diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/samsung/pinctrl-exynos.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c index c81df3c843c3..f16f52ab4912 100644 --- a/drivers/pinctrl/samsung/pinctrl-exynos.c +++ b/drivers/pinctrl/samsung/pinctrl-exynos.c @@ -24,6 +24,7 @@ #include <linux/irqdomain.h> #include <linux/irq.h> #include <linux/irqchip/chained_irq.h> +#include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/io.h> #include <linux/slab.h> @@ -632,6 +633,60 @@ static void exynos_pinctrl_resume(struct samsung_pinctrl_drv_data *drvdata) exynos_pinctrl_resume_bank(drvdata, bank); } +/* Retention control for S5PV210 are located at the end of clock controller */ +#define S5P_OTHERS 0xE000 + +#define S5P_OTHERS_RET_IO (1 << 31) +#define S5P_OTHERS_RET_CF (1 << 30) +#define S5P_OTHERS_RET_MMC (1 << 29) +#define S5P_OTHERS_RET_UART (1 << 28) + +static void s5pv210_retention_disable(struct samsung_pinctrl_drv_data *drvdata) +{ + void *clk_base = drvdata->retention_ctrl->priv; + u32 tmp; + + tmp = __raw_readl(clk_base + S5P_OTHERS); + tmp |= (S5P_OTHERS_RET_IO | S5P_OTHERS_RET_CF | S5P_OTHERS_RET_MMC | + S5P_OTHERS_RET_UART); + __raw_writel(tmp, clk_base + S5P_OTHERS); +} + +static struct samsung_retention_ctrl * +s5pv210_retention_init(struct samsung_pinctrl_drv_data *drvdata, + const struct samsung_retention_data *data) +{ + struct samsung_retention_ctrl *ctrl; + struct device_node *np; + void *clk_base; + + ctrl = devm_kzalloc(drvdata->dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return ERR_PTR(-ENOMEM); + + np = of_find_compatible_node(NULL, NULL, "samsung,s5pv210-clock"); + if (!np) { + pr_err("%s: failed to find clock controller DT node\n", + __func__); + return ERR_PTR(-ENODEV); + } + + clk_base = of_iomap(np, 0); + if (!clk_base) { + pr_err("%s: failed to map clock registers\n", __func__); + return ERR_PTR(-EINVAL); + } + + ctrl->priv = clk_base; + ctrl->disable = s5pv210_retention_disable; + + return ctrl; +} + +static const struct samsung_retention_data s5pv210_retention_data __initconst = { + .init = s5pv210_retention_init, +}; + /* pin banks of s5pv210 pin-controller */ static const struct samsung_pin_bank_data s5pv210_pin_bank[] __initconst = { EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00), @@ -679,6 +734,7 @@ const struct samsung_pin_ctrl s5pv210_pin_ctrl[] __initconst = { .eint_wkup_init = exynos_eint_wkup_init, .suspend = exynos_pinctrl_suspend, .resume = exynos_pinctrl_resume, + .retention_data = &s5pv210_retention_data, }, }; |
