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-rw-r--r--drivers/clk/samsung/clk-exynos5250.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index 870e18b9a687..1fad4c5e3f5d 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -24,6 +24,8 @@
#define APLL_CON0 0x100
#define SRC_CPU 0x200
#define DIV_CPU0 0x500
+#define PWR_CTRL1 0x1020
+#define PWR_CTRL2 0x1024
#define MPLL_LOCK 0x4000
#define MPLL_CON0 0x4100
#define SRC_CORE1 0x4204
@@ -84,6 +86,23 @@
#define SRC_CDREX 0x20200
#define PLL_DIV2_SEL 0x20a24
+/*Below definitions are used for PWR_CTRL settings*/
+#define PWR_CTRL1_CORE2_DOWN_RATIO (7 << 28)
+#define PWR_CTRL1_CORE1_DOWN_RATIO (7 << 16)
+#define PWR_CTRL1_DIV2_DOWN_EN (1 << 9)
+#define PWR_CTRL1_DIV1_DOWN_EN (1 << 8)
+#define PWR_CTRL1_USE_CORE1_WFE (1 << 5)
+#define PWR_CTRL1_USE_CORE0_WFE (1 << 4)
+#define PWR_CTRL1_USE_CORE1_WFI (1 << 1)
+#define PWR_CTRL1_USE_CORE0_WFI (1 << 0)
+
+#define PWR_CTRL2_DIV2_UP_EN (1 << 25)
+#define PWR_CTRL2_DIV1_UP_EN (1 << 24)
+#define PWR_CTRL2_DUR_STANDBY2_VAL (1 << 16)
+#define PWR_CTRL2_DUR_STANDBY1_VAL (1 << 8)
+#define PWR_CTRL2_CORE2_UP_RATIO (1 << 4)
+#define PWR_CTRL2_CORE1_UP_RATIO (1 << 0)
+
/* list of PLLs to be registered */
enum exynos5250_plls {
apll, mpll, cpll, epll, vpll, gpll, bpll,
@@ -102,6 +121,8 @@ static struct samsung_clk_reg_dump *exynos5250_save;
static unsigned long exynos5250_clk_regs[] __initdata = {
SRC_CPU,
DIV_CPU0,
+ PWR_CTRL1,
+ PWR_CTRL2,
SRC_CORE1,
SRC_TOP0,
SRC_TOP1,
@@ -736,6 +757,7 @@ static struct of_device_id ext_clk_match[] __initdata = {
static void __init exynos5250_clk_init(struct device_node *np)
{
struct samsung_clk_provider *ctx;
+ unsigned int tmp;
if (np) {
reg_base = of_iomap(np, 0);
@@ -776,6 +798,26 @@ static void __init exynos5250_clk_init(struct device_node *np)
samsung_clk_register_gate(ctx, exynos5250_gate_clks,
ARRAY_SIZE(exynos5250_gate_clks));
+ /*
+ * Enable arm clock down (in idle) and set arm divider
+ * ratios in WFI/WFE state.
+ */
+ tmp = (PWR_CTRL1_CORE2_DOWN_RATIO | PWR_CTRL1_CORE1_DOWN_RATIO |
+ PWR_CTRL1_DIV2_DOWN_EN | PWR_CTRL1_DIV1_DOWN_EN |
+ PWR_CTRL1_USE_CORE1_WFE | PWR_CTRL1_USE_CORE0_WFE |
+ PWR_CTRL1_USE_CORE1_WFI | PWR_CTRL1_USE_CORE0_WFI);
+ __raw_writel(tmp, reg_base + PWR_CTRL1);
+
+ /*
+ * Enable arm clock up (on exiting idle). Set arm divider
+ * ratios when not in idle along with the standby duration
+ * ratios.
+ */
+ tmp = (PWR_CTRL2_DIV2_UP_EN | PWR_CTRL2_DIV1_UP_EN |
+ PWR_CTRL2_DUR_STANDBY2_VAL | PWR_CTRL2_DUR_STANDBY1_VAL |
+ PWR_CTRL2_CORE2_UP_RATIO | PWR_CTRL2_CORE1_UP_RATIO);
+ __raw_writel(tmp, reg_base + PWR_CTRL2);
+
exynos5250_clk_sleep_init();
pr_info("Exynos5250: clock setup completed, armclk=%ld\n",