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ARM: imx5: reuse clock CCM mapping in pm code 

The imx5 pm code needs to access CCM registers.  Let's remove the use
of CCM static mapping in pm code by reusing the dynamic mapping created
in clock code.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
hifive-unleashed-5.1
Shawn Guo 2014-05-20 13:41:36 +08:00
parent 20484c13ca
commit 4ef5e38701
3 changed files with 17 additions and 4 deletions
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2
arch/arm/mach-imx/clk-imx51-imx53.c
View File

@ -133,6 +133,8 @@ static void __init mx5_clocks_common_init(void __iomem *ccm_base)
{
int i;
imx5_pm_set_ccm_base(ccm_base);
clk[IMX5_CLK_DUMMY] = imx_clk_fixed("dummy", 0);
clk[IMX5_CLK_CKIL] = imx_obtain_fixed_clock("ckil", 0);
clk[IMX5_CLK_OSC] = imx_obtain_fixed_clock("osc", 0);

2
arch/arm/mach-imx/common.h
View File

@ -143,8 +143,10 @@ void imx6q_pm_set_ccm_base(void __iomem *base);
#ifdef CONFIG_PM
void imx5_pm_init(void);
void imx5_pm_set_ccm_base(void __iomem *base);
#else
static inline void imx5_pm_init(void) {}
static inline void imx5_pm_set_ccm_base(void __iomem *base) {}
#endif
#ifdef CONFIG_NEON

17
arch/arm/mach-imx/pm-imx5.c
View File

@ -21,8 +21,7 @@
#include "cpuidle.h"
#include "hardware.h"
#define MX51_CCM_BASE MX51_IO_ADDRESS(MX51_CCM_BASE_ADDR)
#define MXC_CCM_CLPCR (MX51_CCM_BASE + 0x54)
#define MXC_CCM_CLPCR 0x54
#define MXC_CCM_CLPCR_LPM_OFFSET 0
#define MXC_CCM_CLPCR_LPM_MASK 0x3
#define MXC_CCM_CLPCR_STBY_COUNT_OFFSET 9
@ -57,6 +56,13 @@
*/
#define IMX5_DEFAULT_CPU_IDLE_STATE WAIT_UNCLOCKED_POWER_OFF
static void __iomem *ccm_base;
void __init imx5_pm_set_ccm_base(void __iomem *base)
{
ccm_base = base;
}
/*
* set cpu low power mode before WFI instruction. This function is called
* mx5 because it can be used for mx51, and mx53.
@ -70,7 +76,8 @@ static void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode)
/* always allow platform to issue a deep sleep mode request */
plat_lpc = __raw_readl(MXC_CORTEXA8_PLAT_LPC) &
~(MXC_CORTEXA8_PLAT_LPC_DSM);
ccm_clpcr = __raw_readl(MXC_CCM_CLPCR) & ~(MXC_CCM_CLPCR_LPM_MASK);
ccm_clpcr = __raw_readl(ccm_base + MXC_CCM_CLPCR) &
~(MXC_CCM_CLPCR_LPM_MASK);
arm_srpgcr = __raw_readl(MXC_SRPG_ARM_SRPGCR) & ~(MXC_SRPGCR_PCR);
empgc0 = __raw_readl(MXC_SRPG_EMPGC0_SRPGCR) & ~(MXC_SRPGCR_PCR);
empgc1 = __raw_readl(MXC_SRPG_EMPGC1_SRPGCR) & ~(MXC_SRPGCR_PCR);
@ -108,7 +115,7 @@ static void mx5_cpu_lp_set(enum mxc_cpu_pwr_mode mode)
}
__raw_writel(plat_lpc, MXC_CORTEXA8_PLAT_LPC);
__raw_writel(ccm_clpcr, MXC_CCM_CLPCR);
__raw_writel(ccm_clpcr, ccm_base + MXC_CCM_CLPCR);
__raw_writel(arm_srpgcr, MXC_SRPG_ARM_SRPGCR);
__raw_writel(arm_srpgcr, MXC_SRPG_NEON_SRPGCR);
@ -188,6 +195,8 @@ static int __init imx5_pm_common_init(void)
arm_pm_idle = imx5_pm_idle;
WARN_ON(!ccm_base);
/* Set the registers to the default cpu idle state. */
mx5_cpu_lp_set(IMX5_DEFAULT_CPU_IDLE_STATE);