forked from luck/tmp_suning_uos_patched
25f4214e38
Clean all #ifdef's added to OMAP3 clock code to make it COMMON clk ready, not that CONFIG_COMMON_CLK is enabled. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Mike Turquette <mturquette@ti.com> [paul@pwsan.com: remove some ifdefs in mach-omap2/io.c] Signed-off-by: Paul Walmsley <paul@pwsan.com>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/*
|
|
* OMAP36xx-specific clkops
|
|
*
|
|
* Copyright (C) 2010 Texas Instruments, Inc.
|
|
* Copyright (C) 2010 Nokia Corporation
|
|
*
|
|
* Mike Turquette
|
|
* Vijaykumar GN
|
|
* Paul Walmsley
|
|
*
|
|
* Parts of this code are based on code written by
|
|
* Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu,
|
|
* Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#undef DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "clock.h"
|
|
#include "clock36xx.h"
|
|
|
|
|
|
/**
|
|
* omap36xx_pwrdn_clk_enable_with_hsdiv_restore - enable clocks suffering
|
|
* from HSDivider PWRDN problem Implements Errata ID: i556.
|
|
* @clk: DPLL output struct clk
|
|
*
|
|
* 3630 only: dpll3_m3_ck, dpll4_m2_ck, dpll4_m3_ck, dpll4_m4_ck,
|
|
* dpll4_m5_ck & dpll4_m6_ck dividers gets loaded with reset
|
|
* valueafter their respective PWRDN bits are set. Any dummy write
|
|
* (Any other value different from the Read value) to the
|
|
* corresponding CM_CLKSEL register will refresh the dividers.
|
|
*/
|
|
int omap36xx_pwrdn_clk_enable_with_hsdiv_restore(struct clk_hw *clk)
|
|
{
|
|
struct clk_hw_omap *parent;
|
|
struct clk_hw *parent_hw;
|
|
u32 dummy_v, orig_v, clksel_shift;
|
|
int ret;
|
|
|
|
/* Clear PWRDN bit of HSDIVIDER */
|
|
ret = omap2_dflt_clk_enable(clk);
|
|
|
|
parent_hw = __clk_get_hw(__clk_get_parent(clk->clk));
|
|
parent = to_clk_hw_omap(parent_hw);
|
|
|
|
/* Restore the dividers */
|
|
if (!ret) {
|
|
clksel_shift = __ffs(parent->clksel_mask);
|
|
orig_v = __raw_readl(parent->clksel_reg);
|
|
dummy_v = orig_v;
|
|
|
|
/* Write any other value different from the Read value */
|
|
dummy_v ^= (1 << clksel_shift);
|
|
__raw_writel(dummy_v, parent->clksel_reg);
|
|
|
|
/* Write the original divider */
|
|
__raw_writel(orig_v, parent->clksel_reg);
|
|
}
|
|
|
|
return ret;
|
|
}
|