2009-07-02 22:29:12 +08:00
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/*
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* Generic GPIO driver for logic cells found in the Nomadik SoC
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*
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* Copyright (C) 2008,2009 STMicroelectronics
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* Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
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* Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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2010-03-03 11:52:34 +08:00
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#include <linux/platform_device.h>
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2009-07-02 22:29:12 +08:00
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#include <linux/io.h>
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2010-05-06 18:14:17 +08:00
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#include <linux/clk.h>
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#include <linux/err.h>
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2009-07-02 22:29:12 +08:00
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#include <linux/gpio.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/slab.h>
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2009-07-02 22:29:12 +08:00
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2010-06-02 13:06:29 +08:00
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#include <plat/pincfg.h>
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2009-07-02 22:29:12 +08:00
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#include <mach/hardware.h>
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#include <mach/gpio.h>
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/*
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* The GPIO module in the Nomadik family of Systems-on-Chip is an
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* AMBA device, managing 32 pins and alternate functions. The logic block
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2010-10-13 19:14:17 +08:00
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* is currently used in the Nomadik and ux500.
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2009-07-02 22:29:12 +08:00
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*
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* Symbols in this file are called "nmk_gpio" for "nomadik gpio"
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*/
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2010-10-13 19:14:17 +08:00
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static const u32 backup_regs[] = {
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NMK_GPIO_PDIS,
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NMK_GPIO_DIR,
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NMK_GPIO_AFSLA,
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NMK_GPIO_AFSLB,
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NMK_GPIO_SLPC,
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NMK_GPIO_RIMSC,
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NMK_GPIO_FIMSC,
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NMK_GPIO_RWIMSC,
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NMK_GPIO_FWIMSC,
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};
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2009-07-02 22:29:12 +08:00
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struct nmk_gpio_chip {
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struct gpio_chip chip;
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void __iomem *addr;
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2010-05-06 18:14:17 +08:00
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struct clk *clk;
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2010-10-14 13:08:03 +08:00
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unsigned int bank;
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2009-07-02 22:29:12 +08:00
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unsigned int parent_irq;
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2010-11-11 16:40:38 +08:00
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int secondary_parent_irq;
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2010-10-14 13:08:03 +08:00
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u32 (*get_secondary_status)(unsigned int bank);
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2010-03-03 11:48:54 +08:00
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spinlock_t lock;
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2009-07-02 22:29:12 +08:00
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/* Keep track of configured edges */
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u32 edge_rising;
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u32 edge_falling;
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2010-10-13 19:14:17 +08:00
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u32 backup[ARRAY_SIZE(backup_regs)];
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/* Bitmap, 1 = pull up, 0 = pull down */
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u32 pull;
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2009-07-02 22:29:12 +08:00
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};
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2010-06-02 12:50:28 +08:00
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static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, int gpio_mode)
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{
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u32 bit = 1 << offset;
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u32 afunc, bfunc;
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afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit;
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bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit;
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if (gpio_mode & NMK_GPIO_ALT_A)
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afunc |= bit;
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if (gpio_mode & NMK_GPIO_ALT_B)
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bfunc |= bit;
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writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA);
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writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
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}
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2010-05-27 19:39:23 +08:00
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static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, enum nmk_gpio_slpm mode)
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{
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u32 bit = 1 << offset;
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u32 slpm;
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slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC);
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if (mode == NMK_GPIO_SLPM_NOCHANGE)
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slpm |= bit;
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else
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slpm &= ~bit;
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writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC);
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}
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2010-05-27 19:29:50 +08:00
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static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, enum nmk_gpio_pull pull)
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{
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u32 bit = 1 << offset;
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u32 pdis;
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pdis = readl(nmk_chip->addr + NMK_GPIO_PDIS);
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if (pull == NMK_GPIO_PULL_NONE)
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pdis |= bit;
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else
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pdis &= ~bit;
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writel(pdis, nmk_chip->addr + NMK_GPIO_PDIS);
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2010-10-13 19:14:17 +08:00
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if (pull == NMK_GPIO_PULL_UP) {
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nmk_chip->pull |= bit;
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2010-05-27 19:29:50 +08:00
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writel(bit, nmk_chip->addr + NMK_GPIO_DATS);
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2010-10-13 19:14:17 +08:00
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} else if (pull == NMK_GPIO_PULL_DOWN) {
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nmk_chip->pull &= ~bit;
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2010-05-27 19:29:50 +08:00
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writel(bit, nmk_chip->addr + NMK_GPIO_DATC);
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2010-10-13 19:14:17 +08:00
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}
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2010-05-27 19:29:50 +08:00
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}
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2010-06-02 13:06:29 +08:00
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static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip,
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unsigned offset)
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{
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
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}
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2010-09-02 18:28:48 +08:00
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static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, int val)
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{
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if (val)
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATS);
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else
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATC);
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}
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static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, int val)
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{
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writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
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__nmk_gpio_set_output(nmk_chip, offset, val);
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}
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2010-06-02 13:06:29 +08:00
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static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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2010-12-03 23:05:37 +08:00
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pin_cfg_t cfg, bool sleep)
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2010-06-02 13:06:29 +08:00
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{
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static const char *afnames[] = {
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[NMK_GPIO_ALT_GPIO] = "GPIO",
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[NMK_GPIO_ALT_A] = "A",
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[NMK_GPIO_ALT_B] = "B",
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[NMK_GPIO_ALT_C] = "C"
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};
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static const char *pullnames[] = {
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[NMK_GPIO_PULL_NONE] = "none",
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[NMK_GPIO_PULL_UP] = "up",
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[NMK_GPIO_PULL_DOWN] = "down",
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[3] /* illegal */ = "??"
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};
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static const char *slpmnames[] = {
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2010-09-02 18:28:05 +08:00
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[NMK_GPIO_SLPM_INPUT] = "input/wakeup",
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[NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup",
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2010-06-02 13:06:29 +08:00
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};
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int pin = PIN_NUM(cfg);
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int pull = PIN_PULL(cfg);
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int af = PIN_ALT(cfg);
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int slpm = PIN_SLPM(cfg);
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2010-09-02 18:28:48 +08:00
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int output = PIN_DIR(cfg);
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int val = PIN_VAL(cfg);
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2010-06-02 13:06:29 +08:00
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2010-12-03 23:05:37 +08:00
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dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n",
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pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm],
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2010-09-02 18:28:48 +08:00
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output ? "output " : "input",
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output ? (val ? "high" : "low") : "");
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2010-12-03 23:05:37 +08:00
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if (sleep) {
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int slpm_pull = PIN_SLPM_PULL(cfg);
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int slpm_output = PIN_SLPM_DIR(cfg);
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int slpm_val = PIN_SLPM_VAL(cfg);
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/*
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* The SLPM_* values are normal values + 1 to allow zero to
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* mean "same as normal".
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*/
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if (slpm_pull)
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pull = slpm_pull - 1;
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if (slpm_output)
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output = slpm_output - 1;
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if (slpm_val)
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val = slpm_val - 1;
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dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
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pin,
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slpm_pull ? pullnames[pull] : "same",
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slpm_output ? (output ? "output" : "input") : "same",
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slpm_val ? (val ? "high" : "low") : "same");
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}
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2010-09-02 18:28:48 +08:00
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if (output)
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__nmk_gpio_make_output(nmk_chip, offset, val);
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else {
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__nmk_gpio_make_input(nmk_chip, offset);
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__nmk_gpio_set_pull(nmk_chip, offset, pull);
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}
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2010-06-02 13:06:29 +08:00
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__nmk_gpio_set_slpm(nmk_chip, offset, slpm);
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__nmk_gpio_set_mode(nmk_chip, offset, af);
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}
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/**
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* nmk_config_pin - configure a pin's mux attributes
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* @cfg: pin confguration
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*
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* Configures a pin's mode (alternate function or GPIO), its pull up status,
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* and its sleep mode based on the specified configuration. The @cfg is
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* usually one of the SoC specific macros defined in mach/<soc>-pins.h. These
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* are constructed using, and can be further enhanced with, the macros in
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* plat/pincfg.h.
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*
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* If a pin's mode is set to GPIO, it is configured as an input to avoid
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* side-effects. The gpio can be manipulated later using standard GPIO API
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* calls.
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*/
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2010-12-03 23:05:37 +08:00
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int nmk_config_pin(pin_cfg_t cfg, bool sleep)
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2010-06-02 13:06:29 +08:00
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{
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struct nmk_gpio_chip *nmk_chip;
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int gpio = PIN_NUM(cfg);
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unsigned long flags;
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nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
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if (!nmk_chip)
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return -EINVAL;
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spin_lock_irqsave(&nmk_chip->lock, flags);
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2010-12-03 23:05:37 +08:00
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__nmk_config_pin(nmk_chip, gpio - nmk_chip->chip.base, cfg, sleep);
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2010-06-02 13:06:29 +08:00
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spin_unlock_irqrestore(&nmk_chip->lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(nmk_config_pin);
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/**
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* nmk_config_pins - configure several pins at once
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* @cfgs: array of pin configurations
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* @num: number of elments in the array
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*
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* Configures several pins using nmk_config_pin(). Refer to that function for
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* further information.
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*/
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int nmk_config_pins(pin_cfg_t *cfgs, int num)
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{
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int ret = 0;
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int i;
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for (i = 0; i < num; i++) {
|
2010-12-03 23:05:37 +08:00
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ret = nmk_config_pin(cfgs[i], false);
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2010-06-02 13:06:29 +08:00
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if (ret)
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL(nmk_config_pins);
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2010-12-03 23:05:37 +08:00
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int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num)
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{
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int ret = 0;
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int i;
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for (i = 0; i < num; i++) {
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ret = nmk_config_pin(cfgs[i], true);
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if (ret)
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break;
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}
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return ret;
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}
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|
|
EXPORT_SYMBOL(nmk_config_pins_sleep);
|
|
|
|
|
2010-05-27 19:39:23 +08:00
|
|
|
/**
|
|
|
|
* nmk_gpio_set_slpm() - configure the sleep mode of a pin
|
|
|
|
* @gpio: pin number
|
|
|
|
* @mode: NMK_GPIO_SLPM_INPUT or NMK_GPIO_SLPM_NOCHANGE,
|
|
|
|
*
|
|
|
|
* Sets the sleep mode of a pin. If @mode is NMK_GPIO_SLPM_INPUT, the pin is
|
|
|
|
* changed to an input (with pullup/down enabled) in sleep and deep sleep. If
|
|
|
|
* @mode is NMK_GPIO_SLPM_NOCHANGE, the pin remains in the state it was
|
|
|
|
* configured even when in sleep and deep sleep.
|
2010-09-02 18:28:05 +08:00
|
|
|
*
|
|
|
|
* On DB8500v2 onwards, this setting loses the previous meaning and instead
|
|
|
|
* indicates if wakeup detection is enabled on the pin. Note that
|
|
|
|
* enable_irq_wake() will automatically enable wakeup detection.
|
2010-05-27 19:39:23 +08:00
|
|
|
*/
|
|
|
|
int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
|
|
|
|
if (!nmk_chip)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
|
|
__nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base, mode);
|
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-05-27 19:29:50 +08:00
|
|
|
/**
|
|
|
|
* nmk_gpio_set_pull() - enable/disable pull up/down on a gpio
|
|
|
|
* @gpio: pin number
|
|
|
|
* @pull: one of NMK_GPIO_PULL_DOWN, NMK_GPIO_PULL_UP, and NMK_GPIO_PULL_NONE
|
|
|
|
*
|
|
|
|
* Enables/disables pull up/down on a specified pin. This only takes effect if
|
|
|
|
* the pin is configured as an input (either explicitly or by the alternate
|
|
|
|
* function).
|
|
|
|
*
|
|
|
|
* NOTE: If enabling the pull up/down, the caller must ensure that the GPIO is
|
|
|
|
* configured as an input. Otherwise, due to the way the controller registers
|
|
|
|
* work, this function will change the value output on the pin.
|
|
|
|
*/
|
|
|
|
int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
|
|
|
|
if (!nmk_chip)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
|
|
__nmk_gpio_set_pull(nmk_chip, gpio - nmk_chip->chip.base, pull);
|
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
/* Mode functions */
|
2010-10-13 19:14:17 +08:00
|
|
|
/**
|
|
|
|
* nmk_gpio_set_mode() - set the mux mode of a gpio pin
|
|
|
|
* @gpio: pin number
|
|
|
|
* @gpio_mode: one of NMK_GPIO_ALT_GPIO, NMK_GPIO_ALT_A,
|
|
|
|
* NMK_GPIO_ALT_B, and NMK_GPIO_ALT_C
|
|
|
|
*
|
|
|
|
* Sets the mode of the specified pin to one of the alternate functions or
|
|
|
|
* plain GPIO.
|
|
|
|
*/
|
2009-07-02 22:29:12 +08:00
|
|
|
int nmk_gpio_set_mode(int gpio, int gpio_mode)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
|
|
|
|
if (!nmk_chip)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
2010-06-02 12:50:28 +08:00
|
|
|
__nmk_gpio_set_mode(nmk_chip, gpio - nmk_chip->chip.base, gpio_mode);
|
2009-07-02 22:29:12 +08:00
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nmk_gpio_set_mode);
|
|
|
|
|
|
|
|
int nmk_gpio_get_mode(int gpio)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
u32 afunc, bfunc, bit;
|
|
|
|
|
|
|
|
nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
|
|
|
|
if (!nmk_chip)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
bit = 1 << (gpio - nmk_chip->chip.base);
|
|
|
|
|
|
|
|
afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit;
|
|
|
|
bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit;
|
|
|
|
|
|
|
|
return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(nmk_gpio_get_mode);
|
|
|
|
|
|
|
|
|
|
|
|
/* IRQ functions */
|
|
|
|
static inline int nmk_gpio_get_bitmask(int gpio)
|
|
|
|
{
|
|
|
|
return 1 << (gpio % 32);
|
|
|
|
}
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
static void nmk_gpio_irq_ack(struct irq_data *d)
|
2009-07-02 22:29:12 +08:00
|
|
|
{
|
|
|
|
int gpio;
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
gpio = NOMADIK_IRQ_TO_GPIO(d->irq);
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
2009-07-02 22:29:12 +08:00
|
|
|
if (!nmk_chip)
|
|
|
|
return;
|
|
|
|
writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC);
|
|
|
|
}
|
|
|
|
|
2010-06-16 13:09:34 +08:00
|
|
|
enum nmk_gpio_irq_type {
|
|
|
|
NORMAL,
|
|
|
|
WAKE,
|
|
|
|
};
|
|
|
|
|
2010-05-06 17:42:42 +08:00
|
|
|
static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
|
2010-06-16 13:09:34 +08:00
|
|
|
int gpio, enum nmk_gpio_irq_type which,
|
|
|
|
bool enable)
|
2009-07-02 22:29:12 +08:00
|
|
|
{
|
2010-06-16 13:09:34 +08:00
|
|
|
u32 rimsc = which == WAKE ? NMK_GPIO_RWIMSC : NMK_GPIO_RIMSC;
|
|
|
|
u32 fimsc = which == WAKE ? NMK_GPIO_FWIMSC : NMK_GPIO_FIMSC;
|
2010-05-06 17:42:42 +08:00
|
|
|
u32 bitmask = nmk_gpio_get_bitmask(gpio);
|
|
|
|
u32 reg;
|
2009-07-02 22:29:12 +08:00
|
|
|
|
2010-05-06 17:42:42 +08:00
|
|
|
/* we must individually set/clear the two edges */
|
2009-07-02 22:29:12 +08:00
|
|
|
if (nmk_chip->edge_rising & bitmask) {
|
2010-06-16 13:09:34 +08:00
|
|
|
reg = readl(nmk_chip->addr + rimsc);
|
2010-05-06 17:42:42 +08:00
|
|
|
if (enable)
|
|
|
|
reg |= bitmask;
|
|
|
|
else
|
|
|
|
reg &= ~bitmask;
|
2010-06-16 13:09:34 +08:00
|
|
|
writel(reg, nmk_chip->addr + rimsc);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
|
|
|
if (nmk_chip->edge_falling & bitmask) {
|
2010-06-16 13:09:34 +08:00
|
|
|
reg = readl(nmk_chip->addr + fimsc);
|
2010-05-06 17:42:42 +08:00
|
|
|
if (enable)
|
|
|
|
reg |= bitmask;
|
|
|
|
else
|
|
|
|
reg &= ~bitmask;
|
2010-06-16 13:09:34 +08:00
|
|
|
writel(reg, nmk_chip->addr + fimsc);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
2010-05-06 17:42:42 +08:00
|
|
|
}
|
2009-07-02 22:29:12 +08:00
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
static int nmk_gpio_irq_modify(struct irq_data *d, enum nmk_gpio_irq_type which,
|
2010-06-16 13:09:34 +08:00
|
|
|
bool enable)
|
2009-07-02 22:29:12 +08:00
|
|
|
{
|
|
|
|
int gpio;
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
unsigned long flags;
|
2010-05-06 17:42:42 +08:00
|
|
|
u32 bitmask;
|
2009-07-02 22:29:12 +08:00
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
gpio = NOMADIK_IRQ_TO_GPIO(d->irq);
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
2009-07-02 22:29:12 +08:00
|
|
|
bitmask = nmk_gpio_get_bitmask(gpio);
|
|
|
|
if (!nmk_chip)
|
2010-06-16 13:09:34 +08:00
|
|
|
return -EINVAL;
|
2009-07-02 22:29:12 +08:00
|
|
|
|
|
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
2010-06-16 13:09:34 +08:00
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, which, enable);
|
2009-07-02 22:29:12 +08:00
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
2010-06-16 13:09:34 +08:00
|
|
|
|
|
|
|
return 0;
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
static void nmk_gpio_irq_mask(struct irq_data *d)
|
2010-05-06 17:42:42 +08:00
|
|
|
{
|
2010-11-29 18:16:48 +08:00
|
|
|
nmk_gpio_irq_modify(d, NORMAL, false);
|
2010-06-16 13:09:34 +08:00
|
|
|
}
|
2010-05-06 17:42:42 +08:00
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
static void nmk_gpio_irq_unmask(struct irq_data *d)
|
2010-05-06 17:42:42 +08:00
|
|
|
{
|
2010-11-29 18:16:48 +08:00
|
|
|
nmk_gpio_irq_modify(d, NORMAL, true);
|
2010-06-16 13:09:34 +08:00
|
|
|
}
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
|
2010-06-16 13:09:34 +08:00
|
|
|
{
|
2010-09-02 18:28:05 +08:00
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
unsigned long flags;
|
|
|
|
int gpio;
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
gpio = NOMADIK_IRQ_TO_GPIO(d->irq);
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
2010-09-02 18:28:05 +08:00
|
|
|
if (!nmk_chip)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
|
|
#ifdef CONFIG_ARCH_U8500
|
|
|
|
if (cpu_is_u8500v2()) {
|
|
|
|
__nmk_gpio_set_slpm(nmk_chip, gpio,
|
|
|
|
on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
|
|
|
|
: NMK_GPIO_SLPM_WAKEUP_DISABLE);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
|
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
|
|
|
|
|
|
return 0;
|
2010-05-06 17:42:42 +08:00
|
|
|
}
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
|
2009-07-02 22:29:12 +08:00
|
|
|
{
|
2010-11-29 18:16:48 +08:00
|
|
|
struct irq_desc *desc = irq_to_desc(d->irq);
|
2010-06-16 13:09:34 +08:00
|
|
|
bool enabled = !(desc->status & IRQ_DISABLED);
|
|
|
|
bool wake = desc->wake_depth;
|
2009-07-02 22:29:12 +08:00
|
|
|
int gpio;
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
unsigned long flags;
|
|
|
|
u32 bitmask;
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
gpio = NOMADIK_IRQ_TO_GPIO(d->irq);
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
2009-07-02 22:29:12 +08:00
|
|
|
bitmask = nmk_gpio_get_bitmask(gpio);
|
|
|
|
if (!nmk_chip)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (type & IRQ_TYPE_LEVEL_HIGH)
|
|
|
|
return -EINVAL;
|
|
|
|
if (type & IRQ_TYPE_LEVEL_LOW)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
|
|
|
2010-05-06 17:43:55 +08:00
|
|
|
if (enabled)
|
2010-06-16 13:09:34 +08:00
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, false);
|
|
|
|
|
|
|
|
if (wake)
|
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, false);
|
2010-05-06 17:43:55 +08:00
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
nmk_chip->edge_rising &= ~bitmask;
|
|
|
|
if (type & IRQ_TYPE_EDGE_RISING)
|
|
|
|
nmk_chip->edge_rising |= bitmask;
|
|
|
|
|
|
|
|
nmk_chip->edge_falling &= ~bitmask;
|
|
|
|
if (type & IRQ_TYPE_EDGE_FALLING)
|
|
|
|
nmk_chip->edge_falling |= bitmask;
|
|
|
|
|
2010-05-06 17:43:55 +08:00
|
|
|
if (enabled)
|
2010-06-16 13:09:34 +08:00
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, true);
|
|
|
|
|
|
|
|
if (wake)
|
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, true);
|
2009-07-02 22:29:12 +08:00
|
|
|
|
2010-05-06 17:43:55 +08:00
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
2009-07-02 22:29:12 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct irq_chip nmk_gpio_irq_chip = {
|
|
|
|
.name = "Nomadik-GPIO",
|
2010-11-29 18:16:48 +08:00
|
|
|
.irq_ack = nmk_gpio_irq_ack,
|
|
|
|
.irq_mask = nmk_gpio_irq_mask,
|
|
|
|
.irq_unmask = nmk_gpio_irq_unmask,
|
|
|
|
.irq_set_type = nmk_gpio_irq_set_type,
|
|
|
|
.irq_set_wake = nmk_gpio_irq_set_wake,
|
2009-07-02 22:29:12 +08:00
|
|
|
};
|
|
|
|
|
2010-10-14 13:08:03 +08:00
|
|
|
static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc,
|
|
|
|
u32 status)
|
2009-07-02 22:29:12 +08:00
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
2010-03-03 11:50:27 +08:00
|
|
|
struct irq_chip *host_chip = get_irq_chip(irq);
|
2009-07-02 22:29:12 +08:00
|
|
|
unsigned int first_irq;
|
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
if (host_chip->irq_mask_ack)
|
|
|
|
host_chip->irq_mask_ack(&desc->irq_data);
|
2010-03-03 11:50:27 +08:00
|
|
|
else {
|
2010-11-29 18:16:48 +08:00
|
|
|
host_chip->irq_mask(&desc->irq_data);
|
|
|
|
if (host_chip->irq_ack)
|
|
|
|
host_chip->irq_ack(&desc->irq_data);
|
2010-03-03 11:50:27 +08:00
|
|
|
}
|
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
nmk_chip = get_irq_data(irq);
|
|
|
|
first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
|
2010-10-14 13:08:03 +08:00
|
|
|
while (status) {
|
|
|
|
int bit = __ffs(status);
|
|
|
|
|
|
|
|
generic_handle_irq(first_irq + bit);
|
|
|
|
status &= ~BIT(bit);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
2010-03-03 11:50:27 +08:00
|
|
|
|
2010-11-29 18:16:48 +08:00
|
|
|
host_chip->irq_unmask(&desc->irq_data);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
|
|
|
|
2010-10-14 13:08:03 +08:00
|
|
|
static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip = get_irq_data(irq);
|
|
|
|
u32 status = readl(nmk_chip->addr + NMK_GPIO_IS);
|
|
|
|
|
|
|
|
__nmk_gpio_irq_handler(irq, desc, status);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void nmk_gpio_secondary_irq_handler(unsigned int irq,
|
|
|
|
struct irq_desc *desc)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip = get_irq_data(irq);
|
|
|
|
u32 status = nmk_chip->get_secondary_status(nmk_chip->bank);
|
|
|
|
|
|
|
|
__nmk_gpio_irq_handler(irq, desc, status);
|
|
|
|
}
|
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip)
|
|
|
|
{
|
|
|
|
unsigned int first_irq;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
|
2010-03-18 15:05:22 +08:00
|
|
|
for (i = first_irq; i < first_irq + nmk_chip->chip.ngpio; i++) {
|
2009-07-02 22:29:12 +08:00
|
|
|
set_irq_chip(i, &nmk_gpio_irq_chip);
|
|
|
|
set_irq_handler(i, handle_edge_irq);
|
|
|
|
set_irq_flags(i, IRQF_VALID);
|
|
|
|
set_irq_chip_data(i, nmk_chip);
|
2010-05-06 17:45:18 +08:00
|
|
|
set_irq_type(i, IRQ_TYPE_EDGE_FALLING);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
2010-10-14 13:08:03 +08:00
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
set_irq_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler);
|
|
|
|
set_irq_data(nmk_chip->parent_irq, nmk_chip);
|
2010-10-14 13:08:03 +08:00
|
|
|
|
|
|
|
if (nmk_chip->secondary_parent_irq >= 0) {
|
|
|
|
set_irq_chained_handler(nmk_chip->secondary_parent_irq,
|
|
|
|
nmk_gpio_secondary_irq_handler);
|
|
|
|
set_irq_data(nmk_chip->secondary_parent_irq, nmk_chip);
|
|
|
|
}
|
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* I/O Functions */
|
|
|
|
static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
|
|
|
|
writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
u32 bit = 1 << offset;
|
|
|
|
|
|
|
|
return (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
|
|
|
|
int val)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
|
2010-09-02 18:28:48 +08:00
|
|
|
__nmk_gpio_set_output(nmk_chip, offset, val);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
|
|
|
|
2010-05-27 19:22:42 +08:00
|
|
|
static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
|
|
|
|
int val)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
|
2010-09-02 18:28:48 +08:00
|
|
|
__nmk_gpio_make_output(nmk_chip, offset, val);
|
2010-05-27 19:22:42 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-06-16 13:10:43 +08:00
|
|
|
static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
|
|
|
|
return NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base) + offset;
|
|
|
|
}
|
|
|
|
|
2010-03-04 20:09:05 +08:00
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
|
|
|
|
#include <linux/seq_file.h>
|
|
|
|
|
|
|
|
static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
|
|
|
|
{
|
|
|
|
int mode;
|
|
|
|
unsigned i;
|
|
|
|
unsigned gpio = chip->base;
|
|
|
|
int is_out;
|
|
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
const char *modes[] = {
|
|
|
|
[NMK_GPIO_ALT_GPIO] = "gpio",
|
|
|
|
[NMK_GPIO_ALT_A] = "altA",
|
|
|
|
[NMK_GPIO_ALT_B] = "altB",
|
|
|
|
[NMK_GPIO_ALT_C] = "altC",
|
|
|
|
};
|
|
|
|
|
|
|
|
for (i = 0; i < chip->ngpio; i++, gpio++) {
|
|
|
|
const char *label = gpiochip_is_requested(chip, i);
|
|
|
|
bool pull;
|
|
|
|
u32 bit = 1 << i;
|
|
|
|
|
|
|
|
if (!label)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
is_out = readl(nmk_chip->addr + NMK_GPIO_DIR) & bit;
|
|
|
|
pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit);
|
|
|
|
mode = nmk_gpio_get_mode(gpio);
|
|
|
|
seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s",
|
|
|
|
gpio, label,
|
|
|
|
is_out ? "out" : "in ",
|
|
|
|
chip->get
|
|
|
|
? (chip->get(chip, i) ? "hi" : "lo")
|
|
|
|
: "? ",
|
|
|
|
(mode < 0) ? "unknown" : modes[mode],
|
|
|
|
pull ? "pull" : "none");
|
|
|
|
|
|
|
|
if (!is_out) {
|
|
|
|
int irq = gpio_to_irq(gpio);
|
|
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
|
|
|
|
|
|
/* This races with request_irq(), set_irq_type(),
|
|
|
|
* and set_irq_wake() ... but those are "rare".
|
|
|
|
*
|
|
|
|
* More significantly, trigger type flags aren't
|
|
|
|
* currently maintained by genirq.
|
|
|
|
*/
|
|
|
|
if (irq >= 0 && desc->action) {
|
|
|
|
char *trigger;
|
|
|
|
|
|
|
|
switch (desc->status & IRQ_TYPE_SENSE_MASK) {
|
|
|
|
case IRQ_TYPE_NONE:
|
|
|
|
trigger = "(default)";
|
|
|
|
break;
|
|
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
|
|
trigger = "edge-falling";
|
|
|
|
break;
|
|
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
|
|
trigger = "edge-rising";
|
|
|
|
break;
|
|
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
|
|
trigger = "edge-both";
|
|
|
|
break;
|
|
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
|
|
trigger = "level-high";
|
|
|
|
break;
|
|
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
|
|
trigger = "level-low";
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
trigger = "?trigger?";
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
seq_printf(s, " irq-%d %s%s",
|
|
|
|
irq, trigger,
|
|
|
|
(desc->status & IRQ_WAKEUP)
|
|
|
|
? " wakeup" : "");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
seq_printf(s, "\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
#define nmk_gpio_dbg_show NULL
|
|
|
|
#endif
|
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
/* This structure is replicated for each GPIO block allocated at probe time */
|
|
|
|
static struct gpio_chip nmk_gpio_template = {
|
|
|
|
.direction_input = nmk_gpio_make_input,
|
|
|
|
.get = nmk_gpio_get_input,
|
|
|
|
.direction_output = nmk_gpio_make_output,
|
|
|
|
.set = nmk_gpio_set_output,
|
2010-06-16 13:10:43 +08:00
|
|
|
.to_irq = nmk_gpio_to_irq,
|
2010-03-04 20:09:05 +08:00
|
|
|
.dbg_show = nmk_gpio_dbg_show,
|
2009-07-02 22:29:12 +08:00
|
|
|
.can_sleep = 0,
|
|
|
|
};
|
|
|
|
|
2010-09-02 23:13:35 +08:00
|
|
|
static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
2009-07-02 22:29:12 +08:00
|
|
|
{
|
2010-03-03 11:52:34 +08:00
|
|
|
struct nmk_gpio_platform_data *pdata = dev->dev.platform_data;
|
2009-07-02 22:29:12 +08:00
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
struct gpio_chip *chip;
|
2010-03-03 11:52:34 +08:00
|
|
|
struct resource *res;
|
2010-05-06 18:14:17 +08:00
|
|
|
struct clk *clk;
|
2010-10-14 13:08:03 +08:00
|
|
|
int secondary_irq;
|
2010-03-03 11:52:34 +08:00
|
|
|
int irq;
|
2009-07-02 22:29:12 +08:00
|
|
|
int ret;
|
|
|
|
|
2010-03-03 11:52:34 +08:00
|
|
|
if (!pdata)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
|
|
if (!res) {
|
|
|
|
ret = -ENOENT;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
irq = platform_get_irq(dev, 0);
|
|
|
|
if (irq < 0) {
|
|
|
|
ret = irq;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2010-10-14 13:08:03 +08:00
|
|
|
secondary_irq = platform_get_irq(dev, 1);
|
|
|
|
if (secondary_irq >= 0 && !pdata->get_secondary_status) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2010-03-03 11:52:34 +08:00
|
|
|
if (request_mem_region(res->start, resource_size(res),
|
|
|
|
dev_name(&dev->dev)) == NULL) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
2009-07-02 22:29:12 +08:00
|
|
|
|
2010-05-06 18:14:17 +08:00
|
|
|
clk = clk_get(&dev->dev, NULL);
|
|
|
|
if (IS_ERR(clk)) {
|
|
|
|
ret = PTR_ERR(clk);
|
|
|
|
goto out_release;
|
|
|
|
}
|
|
|
|
|
|
|
|
clk_enable(clk);
|
|
|
|
|
2009-07-02 22:29:12 +08:00
|
|
|
nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL);
|
|
|
|
if (!nmk_chip) {
|
|
|
|
ret = -ENOMEM;
|
2010-05-06 18:14:17 +08:00
|
|
|
goto out_clk;
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
|
|
|
/*
|
|
|
|
* The virt address in nmk_chip->addr is in the nomadik register space,
|
|
|
|
* so we can simply convert the resource address, without remapping
|
|
|
|
*/
|
2010-10-14 13:08:03 +08:00
|
|
|
nmk_chip->bank = dev->id;
|
2010-05-06 18:14:17 +08:00
|
|
|
nmk_chip->clk = clk;
|
2010-03-03 11:52:34 +08:00
|
|
|
nmk_chip->addr = io_p2v(res->start);
|
2009-07-02 22:29:12 +08:00
|
|
|
nmk_chip->chip = nmk_gpio_template;
|
2010-03-03 11:52:34 +08:00
|
|
|
nmk_chip->parent_irq = irq;
|
2010-10-14 13:08:03 +08:00
|
|
|
nmk_chip->secondary_parent_irq = secondary_irq;
|
|
|
|
nmk_chip->get_secondary_status = pdata->get_secondary_status;
|
2010-03-03 11:48:54 +08:00
|
|
|
spin_lock_init(&nmk_chip->lock);
|
2009-07-02 22:29:12 +08:00
|
|
|
|
|
|
|
chip = &nmk_chip->chip;
|
|
|
|
chip->base = pdata->first_gpio;
|
2010-03-18 15:05:22 +08:00
|
|
|
chip->ngpio = pdata->num_gpio;
|
2010-12-08 13:37:54 +08:00
|
|
|
chip->label = pdata->name ?: dev_name(&dev->dev);
|
2009-07-02 22:29:12 +08:00
|
|
|
chip->dev = &dev->dev;
|
|
|
|
chip->owner = THIS_MODULE;
|
|
|
|
|
|
|
|
ret = gpiochip_add(&nmk_chip->chip);
|
|
|
|
if (ret)
|
|
|
|
goto out_free;
|
|
|
|
|
2010-03-03 11:52:34 +08:00
|
|
|
platform_set_drvdata(dev, nmk_chip);
|
2009-07-02 22:29:12 +08:00
|
|
|
|
|
|
|
nmk_gpio_init_irq(nmk_chip);
|
|
|
|
|
|
|
|
dev_info(&dev->dev, "Bits %i-%i at address %p\n",
|
|
|
|
nmk_chip->chip.base, nmk_chip->chip.base+31, nmk_chip->addr);
|
|
|
|
return 0;
|
|
|
|
|
2010-03-03 11:52:34 +08:00
|
|
|
out_free:
|
2009-07-02 22:29:12 +08:00
|
|
|
kfree(nmk_chip);
|
2010-05-06 18:14:17 +08:00
|
|
|
out_clk:
|
|
|
|
clk_disable(clk);
|
|
|
|
clk_put(clk);
|
2010-03-03 11:52:34 +08:00
|
|
|
out_release:
|
|
|
|
release_mem_region(res->start, resource_size(res));
|
|
|
|
out:
|
2009-07-02 22:29:12 +08:00
|
|
|
dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret,
|
|
|
|
pdata->first_gpio, pdata->first_gpio+31);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-10-13 19:14:17 +08:00
|
|
|
#ifdef CONFIG_NOMADIK_GPIO_PM
|
2010-03-17 17:49:04 +08:00
|
|
|
static int nmk_gpio_pm(struct platform_device *dev, bool suspend)
|
|
|
|
{
|
|
|
|
struct nmk_gpio_chip *nmk_chip = platform_get_drvdata(dev);
|
|
|
|
int i;
|
2010-10-13 19:14:17 +08:00
|
|
|
u32 dir;
|
|
|
|
u32 dat;
|
2010-03-17 17:49:04 +08:00
|
|
|
|
2010-10-13 19:14:17 +08:00
|
|
|
for (i = 0; i < ARRAY_SIZE(backup_regs); i++) {
|
2010-03-17 17:49:04 +08:00
|
|
|
if (suspend)
|
2010-10-13 19:14:17 +08:00
|
|
|
nmk_chip->backup[i] = readl(nmk_chip->addr +
|
|
|
|
backup_regs[i]);
|
2010-03-17 17:49:04 +08:00
|
|
|
else
|
2010-10-13 19:14:17 +08:00
|
|
|
writel(nmk_chip->backup[i],
|
|
|
|
nmk_chip->addr + backup_regs[i]);
|
2010-03-17 17:49:04 +08:00
|
|
|
}
|
|
|
|
|
2010-10-13 19:14:17 +08:00
|
|
|
if (!suspend) {
|
|
|
|
/*
|
|
|
|
* Restore pull-up and pull-down on inputs and
|
|
|
|
* outputs.
|
|
|
|
*/
|
|
|
|
dir = readl(nmk_chip->addr + NMK_GPIO_DIR);
|
|
|
|
dat = readl(nmk_chip->addr + NMK_GPIO_DAT);
|
|
|
|
|
|
|
|
writel((nmk_chip->pull & ~dir) |
|
|
|
|
(dat & dir),
|
|
|
|
nmk_chip->addr + NMK_GPIO_DATS);
|
|
|
|
|
|
|
|
writel((~nmk_chip->pull & ~dir) |
|
|
|
|
(~dat & dir),
|
|
|
|
nmk_chip->addr + NMK_GPIO_DATC);
|
|
|
|
}
|
2010-03-17 17:49:04 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nmk_gpio_suspend(struct platform_device *dev, pm_message_t state)
|
|
|
|
{
|
|
|
|
return nmk_gpio_pm(dev, true);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nmk_gpio_resume(struct platform_device *dev)
|
|
|
|
{
|
|
|
|
return nmk_gpio_pm(dev, false);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
#define nmk_gpio_suspend NULL
|
|
|
|
#define nmk_gpio_resume NULL
|
|
|
|
#endif
|
|
|
|
|
2010-03-03 11:52:34 +08:00
|
|
|
static struct platform_driver nmk_gpio_driver = {
|
|
|
|
.driver = {
|
2009-07-02 22:29:12 +08:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = "gpio",
|
|
|
|
},
|
|
|
|
.probe = nmk_gpio_probe,
|
2010-03-17 17:49:04 +08:00
|
|
|
.suspend = nmk_gpio_suspend,
|
|
|
|
.resume = nmk_gpio_resume,
|
2009-07-02 22:29:12 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static int __init nmk_gpio_init(void)
|
|
|
|
{
|
2010-03-03 11:52:34 +08:00
|
|
|
return platform_driver_register(&nmk_gpio_driver);
|
2009-07-02 22:29:12 +08:00
|
|
|
}
|
|
|
|
|
2010-06-02 13:09:52 +08:00
|
|
|
core_initcall(nmk_gpio_init);
|
2009-07-02 22:29:12 +08:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
|
|
|
|
MODULE_DESCRIPTION("Nomadik GPIO Driver");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
|