pinctrl: lpc18xx: create pin cap lookup helper
Both pconf_get_pin and pconf_set_pin needs to lookup pin cap based
on the pin number. Create a common helper function that both
functions can use that also handles the case where no pin number is
found in the pins array.
This also fixes a small bug in pconf_get_pin where pconf_get_i2c0
would use the pins array index rather than the pin number.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-lpc18xx.c b/drivers/pinctrl/pinctrl-lpc18xx.c
index 15fe1e2..0facb7e 100644
--- a/drivers/pinctrl/pinctrl-lpc18xx.c
+++ b/drivers/pinctrl/pinctrl-lpc18xx.c
@@ -729,6 +729,18 @@
return 0;
}
+static struct lpc18xx_pin_caps *lpc18xx_get_pin_caps(unsigned pin)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
+ if (lpc18xx_pins[i].number == pin)
+ return lpc18xx_pins[i].drv_data;
+ }
+
+ return NULL;
+}
+
static int lpc18xx_pconf_get(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *config)
{
@@ -737,14 +749,11 @@
struct lpc18xx_pin_caps *pin_cap;
int ret, arg = 0;
u32 reg;
- int i;
- for (i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
- if (lpc18xx_pins[i].number == pin)
- pin = i;
- }
+ pin_cap = lpc18xx_get_pin_caps(pin);
+ if (!pin_cap)
+ return -EINVAL;
- pin_cap = lpc18xx_pins[pin].drv_data;
reg = readl(scu->base + pin_cap->offset);
if (pin_cap->type == TYPE_I2C0)
@@ -905,12 +914,10 @@
int ret;
int i;
- for (i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
- if (lpc18xx_pins[i].number == pin)
- break;
- }
+ pin_cap = lpc18xx_get_pin_caps(pin);
+ if (!pin_cap)
+ return -EINVAL;
- pin_cap = lpc18xx_pins[i].drv_data;
reg = readl(scu->base + pin_cap->offset);
for (i = 0; i < num_configs; i++) {