[15/20] ARM: imx5: reuse clock CCM mapping in pm code

Commit Message

Shawn Guo May 20, 2014, 8:45 a.m. UTC

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 <[e-mail]>
---
 arch/arm/mach-imx/clk-imx51-imx53.c |  2 ++
 arch/arm/mach-imx/common.h          |  2 ++
 arch/arm/mach-imx/pm-imx5.c         | 17 +++++++++++++----
 3 files changed, 17 insertions(+), 4 deletions(-)

Patch

diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c
index 4b69183..4e95865 100644
--- a/arch/arm/mach-imx/clk-imx51-imx53.c
+++ b/arch/arm/mach-imx/clk-imx51-imx53.c
@@ -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);
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 1d6cf4d..8aa198c 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -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
diff --git a/arch/arm/mach-imx/pm-imx5.c b/arch/arm/mach-imx/pm-imx5.c
index 7dfd005..3544c25 100644
--- a/arch/arm/mach-imx/pm-imx5.c
+++ b/arch/arm/mach-imx/pm-imx5.c
@@ -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);