1 files changed, 23 insertions, 8 deletions

diff --git a/arch/arm/mach-cns3xxx/pm.c b/arch/arm/mach-cns3xxx/pm.c
index 725e1a4fc23..38e44706fea 100644
--- a/arch/arm/mach-cns3xxx/pm.c
+++ b/arch/arm/mach-cns3xxx/pm.c
@@ -6,18 +6,25 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/io.h>
 #include <linux/delay.h>
 #include <mach/system.h>
 #include <mach/cns3xxx.h>
 
 void cns3xxx_pwr_clk_en(unsigned int block)
 {
-        PM_CLK_GATE_REG |= (block & PM_CLK_GATE_REG_MASK);
+        u32 reg = __raw_readl(PM_CLK_GATE_REG);
+
+        reg |= (block & PM_CLK_GATE_REG_MASK);
+        __raw_writel(reg, PM_CLK_GATE_REG);
 }
 
 void cns3xxx_pwr_power_up(unsigned int block)
 {
-        PM_PLL_HM_PD_CTRL_REG &= ~(block & CNS3XXX_PWR_PLL_ALL);
+        u32 reg = __raw_readl(PM_PLL_HM_PD_CTRL_REG);
+
+        reg &= ~(block & CNS3XXX_PWR_PLL_ALL);
+        __raw_writel(reg, PM_PLL_HM_PD_CTRL_REG);
 
         /* Wait for 300us for the PLL output clock locked. */
         udelay(300);
@@ -25,22 +32,29 @@ void cns3xxx_pwr_power_up(unsigned int block)
 
 void cns3xxx_pwr_power_down(unsigned int block)
 {
+        u32 reg = __raw_readl(PM_PLL_HM_PD_CTRL_REG);
+
         /* write '1' to power down */
-        PM_PLL_HM_PD_CTRL_REG |= (block & CNS3XXX_PWR_PLL_ALL);
+        reg |= (block & CNS3XXX_PWR_PLL_ALL);
+        __raw_writel(reg, PM_PLL_HM_PD_CTRL_REG);
 };
 
 static void cns3xxx_pwr_soft_rst_force(unsigned int block)
 {
+        u32 reg = __raw_readl(PM_SOFT_RST_REG);
+
         /*
          * bit 0, 28, 29 => program low to reset,
          * the other else program low and then high
          */
         if (block & 0x30000001) {
-                PM_SOFT_RST_REG &= ~(block & PM_SOFT_RST_REG_MASK);
+                reg &= ~(block & PM_SOFT_RST_REG_MASK);
         } else {
-                PM_SOFT_RST_REG &= ~(block & PM_SOFT_RST_REG_MASK);
-                PM_SOFT_RST_REG |= (block & PM_SOFT_RST_REG_MASK);
+                reg &= ~(block & PM_SOFT_RST_REG_MASK);
+                reg |= (block & PM_SOFT_RST_REG_MASK);
         }
+
+        __raw_writel(reg, PM_SOFT_RST_REG);
 }
 
 void cns3xxx_pwr_soft_rst(unsigned int block)
@@ -73,12 +87,13 @@ void arch_reset(char mode, const char *cmd)
  */
 int cns3xxx_cpu_clock(void)
 {
+        u32 reg = __raw_readl(PM_CLK_CTRL_REG);
         int cpu;
         int cpu_sel;
         int div_sel;
 
-        cpu_sel = (PM_CLK_CTRL_REG >> PM_CLK_CTRL_REG_OFFSET_PLL_CPU_SEL) & 0xf;
-        div_sel = (PM_CLK_CTRL_REG >> PM_CLK_CTRL_REG_OFFSET_CPU_CLK_DIV) & 0x3;
+        cpu_sel = (reg >> PM_CLK_CTRL_REG_OFFSET_PLL_CPU_SEL) & 0xf;
+        div_sel = (reg >> PM_CLK_CTRL_REG_OFFSET_CPU_CLK_DIV) & 0x3;
 
         cpu = (300 + ((cpu_sel / 3) * 100) + ((cpu_sel % 3) * 33)) >> div_sel;