pinctrl: samsung: Match pin banks with their device nodes

This patch is a preparation for converting the pinctrl-samsung driver to
one GPIO chip and IRQ domain per bank. It binds banks defined by
internal driver data with bank nodes in device tree.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 15 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c
index 94e13780a6a6..f266710a1b04 100644
--- a/drivers/pinctrl/pinctrl-samsung.c
+++ b/drivers/pinctrl/pinctrl-samsung.c
@@ -794,6 +794,7 @@ static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data(
         int id;
         const struct of_device_id *match;
         const struct device_node *node = pdev->dev.of_node;
+        struct device_node *np;
         struct samsung_pin_ctrl *ctrl;
         struct samsung_pin_bank *bank;
         int i;
@@ -816,6 +817,18 @@ static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data(
                 }
         }
 
+        for_each_child_of_node(node, np) {
+                if (!of_find_property(np, "gpio-controller", NULL))
+                        continue;
+                bank = ctrl->pin_banks;
+                for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+                        if (!strcmp(bank->name, np->name)) {
+                                bank->of_node = np;
+                                break;
+                        }
+                }
+        }
+
         ctrl->base = pin_base;
         pin_base += ctrl->nr_pins;
 
diff --git a/drivers/pinctrl/pinctrl-samsung.h b/drivers/pinctrl/pinctrl-samsung.h
index b8956934cda6..5c53f32cca06 100644
--- a/drivers/pinctrl/pinctrl-samsung.h
+++ b/drivers/pinctrl/pinctrl-samsung.h
@@ -111,6 +111,7 @@ struct samsung_pinctrl_drv_data;
  * @eint_type: type of the external interrupt supported by the bank.
  * @irq_base: starting controller local irq number of the bank.
  * @name: name to be prefixed for each pin in this pin bank.
+ * @of_node: OF node of the bank.
  */
 struct samsung_pin_bank {
         u32             pctl_offset;
@@ -124,6 +125,7 @@ struct samsung_pin_bank {
         enum eint_type  eint_type;
         u32             irq_base;
         char            *name;
+        struct device_node *of_node;
 };
 
 /**