diff options
Diffstat (limited to 'drivers/clk/samsung/clk-exynos3250.c')
| -rw-r--r-- | drivers/clk/samsung/clk-exynos3250.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/clk/samsung/clk-exynos3250.c b/drivers/clk/samsung/clk-exynos3250.c index 7a17bd40d1dd..dc85f8e7a2d7 100644 --- a/drivers/clk/samsung/clk-exynos3250.c +++ b/drivers/clk/samsung/clk-exynos3250.c @@ -87,6 +87,22 @@ #define SRC_CPU 0x14200 #define DIV_CPU0 0x14500 #define DIV_CPU1 0x14504 +#define PWR_CTRL1 0x15020 +#define PWR_CTRL2 0x15024 + +/* Below definitions are used for PWR_CTRL settings */ +#define PWR_CTRL1_CORE2_DOWN_RATIO(x) (((x) & 0x7) << 28) +#define PWR_CTRL1_CORE1_DOWN_RATIO(x) (((x) & 0x7) << 16) +#define PWR_CTRL1_DIV2_DOWN_EN (1 << 9) +#define PWR_CTRL1_DIV1_DOWN_EN (1 << 8) +#define PWR_CTRL1_USE_CORE3_WFE (1 << 7) +#define PWR_CTRL1_USE_CORE2_WFE (1 << 6) +#define PWR_CTRL1_USE_CORE1_WFE (1 << 5) +#define PWR_CTRL1_USE_CORE0_WFE (1 << 4) +#define PWR_CTRL1_USE_CORE3_WFI (1 << 3) +#define PWR_CTRL1_USE_CORE2_WFI (1 << 2) +#define PWR_CTRL1_USE_CORE1_WFI (1 << 1) +#define PWR_CTRL1_USE_CORE0_WFI (1 << 0) /* list of PLLs to be registered */ enum exynos3250_plls { @@ -168,6 +184,8 @@ static unsigned long exynos3250_cmu_clk_regs[] __initdata = { SRC_CPU, DIV_CPU0, DIV_CPU1, + PWR_CTRL1, + PWR_CTRL2, }; static int exynos3250_clk_suspend(void) @@ -748,6 +766,27 @@ static struct samsung_pll_clock exynos3250_plls[nr_plls] __initdata = { UPLL_LOCK, UPLL_CON0, NULL), }; +static void __init exynos3_core_down_clock(void) +{ + unsigned int tmp; + + /* + * Enable arm clock down (in idle) and set arm divider + * ratios in WFI/WFE state. + */ + tmp = (PWR_CTRL1_CORE2_DOWN_RATIO(7) | PWR_CTRL1_CORE1_DOWN_RATIO(7) | + 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); + + /* + * Disable the clock up feature on Exynos4x12, in case it was + * enabled by bootloader. + */ + __raw_writel(0x0, reg_base + PWR_CTRL2); +} + static void __init exynos3250_cmu_init(struct device_node *np) { struct samsung_clk_provider *ctx; @@ -775,6 +814,10 @@ static void __init exynos3250_cmu_init(struct device_node *np) samsung_clk_register_div(ctx, div_clks, ARRAY_SIZE(div_clks)); samsung_clk_register_gate(ctx, gate_clks, ARRAY_SIZE(gate_clks)); + exynos3_core_down_clock(); + exynos3250_clk_sleep_init(); + + samsung_clk_of_add_provider(np, ctx); } CLK_OF_DECLARE(exynos3250_cmu, "samsung,exynos3250-cmu", exynos3250_cmu_init); |