pinctrl: samsung: Add support for SoC-specific suspend/resume callbacks

SoC-specific driver might require additional save and restore of
registers. This patch adds pair of SoC-specific callbacks per pinctrl
device to account for this.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 9 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c
index 15db2580c145..63ac22e89678 100644
--- a/drivers/pinctrl/pinctrl-samsung.c
+++ b/drivers/pinctrl/pinctrl-samsung.c
@@ -1010,6 +1010,9 @@ static void samsung_pinctrl_suspend_dev(
                                  reg, bank->pm_save[PINCFG_TYPE_FUNC]);
                 }
         }
+
+        if (ctrl->suspend)
+                ctrl->suspend(drvdata);
 }
 
 /**
@@ -1026,6 +1029,9 @@ static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata)
         void __iomem *virt_base = drvdata->virt_base;
         int i;
 
+        if (ctrl->resume)
+                ctrl->resume(drvdata);
+
         for (i = 0; i < ctrl->nr_banks; i++) {
                 struct samsung_pin_bank *bank = &ctrl->pin_banks[i];
                 void __iomem *reg = virt_base + bank->pctl_offset;
diff --git a/drivers/pinctrl/pinctrl-samsung.h b/drivers/pinctrl/pinctrl-samsung.h
index 9f5cc811b8cf..b316d9fe9b6b 100644
--- a/drivers/pinctrl/pinctrl-samsung.h
+++ b/drivers/pinctrl/pinctrl-samsung.h
@@ -187,6 +187,9 @@ struct samsung_pin_ctrl {
 
         int             (*eint_gpio_init)(struct samsung_pinctrl_drv_data *);
         int             (*eint_wkup_init)(struct samsung_pinctrl_drv_data *);
+        void            (*suspend)(struct samsung_pinctrl_drv_data *);
+        void            (*resume)(struct samsung_pinctrl_drv_data *);
+
         char            *label;
 };