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MIPS: Netlogic: Platform changes for XLR/XLS I2C

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Add platform code for XLR/XLS I2C controller and devices. Add
devices on the I2C bus on the XLR/XLS developement boards.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3757/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jayachandran C 2012-07-24 17:28:54 +02:00 committed by Ralf Baechle
parent 3a2f9b9905
commit 77c8da014a
2 changed files with 55 additions and 0 deletions
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4
arch/mips/configs/nlm_xlr_defconfig
View File

@ -367,6 +367,10 @@ CONFIG_SERIAL_8250_RSA=y
CONFIG_HW_RANDOM=y
CONFIG_HW_RANDOM_TIMERIOMEM=m
CONFIG_RAW_DRIVER=m
CONFIG_I2C=y
CONFIG_I2C_XLR=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_DS1374=y
# CONFIG_HWMON is not set
# CONFIG_VGA_CONSOLE is not set
# CONFIG_HID_SUPPORT is not set

51
arch/mips/netlogic/xlr/platform.c
View File

@ -14,6 +14,7 @@
#include <linux/resource.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/i2c.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/xlr/iomap.h>
@ -186,3 +187,53 @@ int xls_platform_usb_init(void)
arch_initcall(xls_platform_usb_init);
#endif
#ifdef CONFIG_I2C
static struct i2c_board_info nlm_i2c_board_info1[] __initdata = {
/* All XLR boards have this RTC and Max6657 Temp Chip */
[0] = {
.type = "ds1374",
.addr = 0x68
},
[1] = {
.type = "lm90",
.addr = 0x4c
},
};
static struct resource i2c_resources[] = {
[0] = {
.start = 0, /* filled at init */
.end = 0,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device nlm_xlr_i2c_1 = {
.name = "xlr-i2cbus",
.id = 1,
.num_resources = 1,
.resource = i2c_resources,
};
static int __init nlm_i2c_init(void)
{
int err = 0;
unsigned int offset;
/* I2C bus 0 does not have any useful devices, configure only bus 1 */
offset = NETLOGIC_IO_I2C_1_OFFSET;
nlm_xlr_i2c_1.resource[0].start = CPHYSADDR(nlm_mmio_base(offset));
nlm_xlr_i2c_1.resource[0].end = nlm_xlr_i2c_1.resource[0].start + 0xfff;
platform_device_register(&nlm_xlr_i2c_1);
err = i2c_register_board_info(1, nlm_i2c_board_info1,
ARRAY_SIZE(nlm_i2c_board_info1));
if (err < 0)
pr_err("nlm-i2c: cannot register board I2C devices\n");
return err;
}
arch_initcall(nlm_i2c_init);
#endif