diff options
| -rw-r--r-- | drivers/pinctrl/samsung/pinctrl-samsung.c | 12 | ||||
| -rw-r--r-- | drivers/pinctrl/samsung/pinctrl-samsung.h | 42 |
2 files changed, 54 insertions, 0 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c index 59f99ea7e65b..021abd7221f8 100644 --- a/drivers/pinctrl/samsung/pinctrl-samsung.c +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c @@ -1060,6 +1060,13 @@ static int samsung_pinctrl_probe(struct platform_device *pdev) if (res) drvdata->irq = res->start; + if (ctrl->retention_data) { + drvdata->retention_ctrl = ctrl->retention_data->init(drvdata, + ctrl->retention_data); + if (IS_ERR(drvdata->retention_ctrl)) + return PTR_ERR(drvdata->retention_ctrl); + } + ret = samsung_gpiolib_register(pdev, drvdata); if (ret) return ret; @@ -1126,6 +1133,8 @@ static void samsung_pinctrl_suspend_dev( if (drvdata->suspend) drvdata->suspend(drvdata); + if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable) + drvdata->retention_ctrl->enable(drvdata); } /** @@ -1173,6 +1182,9 @@ static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata) if (widths[type]) writel(bank->pm_save[type], reg + offs[type]); } + + if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable) + drvdata->retention_ctrl->disable(drvdata); } /** diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h index 6f7ce7539a00..515a61035e54 100644 --- a/drivers/pinctrl/samsung/pinctrl-samsung.h +++ b/drivers/pinctrl/samsung/pinctrl-samsung.h @@ -185,10 +185,48 @@ struct samsung_pin_bank { }; /** + * struct samsung_retention_data: runtime pin-bank retention control data. + * @regs: array of PMU registers to control pad retention. + * @nr_regs: number of registers in @regs array. + * @value: value to store to registers to turn off retention. + * @refcnt: atomic counter if retention control affects more than one bank. + * @priv: retention control code private data + * @enable: platform specific callback to enter retention mode. + * @disable: platform specific callback to exit retention mode. + **/ +struct samsung_retention_ctrl { + const u32 *regs; + int nr_regs; + u32 value; + atomic_t *refcnt; + void *priv; + void (*enable)(struct samsung_pinctrl_drv_data *); + void (*disable)(struct samsung_pinctrl_drv_data *); +}; + +/** + * struct samsung_retention_data: represent a pin-bank retention control data. + * @regs: array of PMU registers to control pad retention. + * @nr_regs: number of registers in @regs array. + * @value: value to store to registers to turn off retention. + * @refcnt: atomic counter if retention control affects more than one bank. + * @init: platform specific callback to initialize retention control. + **/ +struct samsung_retention_data { + const u32 *regs; + int nr_regs; + u32 value; + atomic_t *refcnt; + struct samsung_retention_ctrl *(*init)(struct samsung_pinctrl_drv_data *, + const struct samsung_retention_data *); +}; + +/** * struct samsung_pin_ctrl: represent a pin controller. * @pin_banks: list of pin banks included in this controller. * @nr_banks: number of pin banks. * @nr_ext_resources: number of the extra base address for pin banks. + * @retention_data: configuration data for retention control. * @eint_gpio_init: platform specific callback to setup the external gpio * interrupts for the controller. * @eint_wkup_init: platform specific callback to setup the external wakeup @@ -198,6 +236,7 @@ struct samsung_pin_ctrl { const struct samsung_pin_bank_data *pin_banks; u32 nr_banks; int nr_ext_resources; + const struct samsung_retention_data *retention_data; int (*eint_gpio_init)(struct samsung_pinctrl_drv_data *); int (*eint_wkup_init)(struct samsung_pinctrl_drv_data *); @@ -219,6 +258,7 @@ struct samsung_pin_ctrl { * @nr_function: number of such pin functions. * @pin_base: starting system wide pin number. * @nr_pins: number of pins supported by the controller. + * @retention_ctrl: retention control runtime data. */ struct samsung_pinctrl_drv_data { struct list_head node; @@ -238,6 +278,8 @@ struct samsung_pinctrl_drv_data { unsigned int pin_base; unsigned int nr_pins; + struct samsung_retention_ctrl *retention_ctrl; + void (*suspend)(struct samsung_pinctrl_drv_data *); void (*resume)(struct samsung_pinctrl_drv_data *); }; |