[PATCH 3/7] pinctrl: exynos: Rework pin_to_bank_base() to obtain data by name

[Sam Protsenko]

Rework pin_to_bank_base() function to obtain bank data structure by bank
name instead of getting bank base address by pin name, and rename it to
get_bank() to reflect this change. This in turn leads to the extraction
of parse_pin(), so the caller has to use it before calling get_bank().

No functional change. This is a refactoring commit which prepares
pinctrl driver code for handling different sizes of register fields,
which will be added next.

Signed-off-by: Sam Protsenko <semen.protse...@linaro.org>
---
 drivers/pinctrl/exynos/pinctrl-exynos.c | 27 +++++++++++++------------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/pinctrl/exynos/pinctrl-exynos.c 
b/drivers/pinctrl/exynos/pinctrl-exynos.c
index 2d194ba0a4b5..d908927135b6 100644
--- a/drivers/pinctrl/exynos/pinctrl-exynos.c
+++ b/drivers/pinctrl/exynos/pinctrl-exynos.c
@@ -50,17 +50,14 @@ static void parse_pin(const char *pin_name, u32 *pin, char 
*bank_name)
        *pin = pin_name[++idx] - '0';
 }
 
-/* given a pin-name, return the address of pin config registers */
-static unsigned long pin_to_bank_base(struct udevice *dev, const char 
*pin_name,
-                                               u32 *pin)
+/* given a bank name, find out the pin bank structure */
+static const struct samsung_pin_bank_data *get_bank(struct udevice *dev,
+                                                   const char *bank_name)
 {
        struct exynos_pinctrl_priv *priv = dev_get_priv(dev);
        const struct samsung_pin_ctrl *pin_ctrl_array = priv->pin_ctrl;
        const struct samsung_pin_bank_data *bank_data;
-       u32 nr_banks, pin_ctrl_idx = 0, idx = 0, bank_base;
-       char bank[10];
-
-       parse_pin(pin_name, pin, bank);
+       u32 nr_banks, pin_ctrl_idx = 0, idx = 0;
 
        /* lookup the pin bank data using the pin bank name */
        while (true) {
@@ -75,15 +72,13 @@ static unsigned long pin_to_bank_base(struct udevice *dev, 
const char *pin_name,
                for (idx = 0; idx < nr_banks; idx++) {
                        debug("pinctrl[%d] bank_data[%d] name is: %s\n",
                                        pin_ctrl_idx, idx, bank_data[idx].name);
-                       if (!strcmp(bank, bank_data[idx].name)) {
-                               bank_base = priv->base + bank_data[idx].offset;
-                               break;
-                       }
+                       if (!strcmp(bank_name, bank_data[idx].name))
+                               return &bank_data[idx];
                }
                pin_ctrl_idx++;
        }
 
-       return bank_base;
+       return NULL;
 }
 
 /**
@@ -93,6 +88,7 @@ static unsigned long pin_to_bank_base(struct udevice *dev, 
const char *pin_name,
  */
 int exynos_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 {
+       struct exynos_pinctrl_priv *priv = dev_get_priv(dev);
        const void *fdt = gd->fdt_blob;
        int node = dev_of_offset(config);
        unsigned int count, idx, pin_num;
@@ -113,10 +109,15 @@ int exynos_pinctrl_set_state(struct udevice *dev, struct 
udevice *config)
        pindrv = fdtdec_get_int(fdt, node, "samsung,pin-drv", -1);
 
        for (idx = 0; idx < count; idx++) {
+               const struct samsung_pin_bank_data *bank;
+               char bank_name[10];
+
                name = fdt_stringlist_get(fdt, node, "samsung,pins", idx, NULL);
                if (!name)
                        continue;
-               reg = pin_to_bank_base(dev, name, &pin_num);
+               parse_pin(name, &pin_num, bank_name);
+               bank = get_bank(dev, bank_name);
+               reg = priv->base + bank->offset;
 
                if (pinfunc != -1) {
                        value = readl(reg + PIN_CON);
-- 
2.39.2