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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2020-09-30 10:20:10 +0200
committerBartosz Golaszewski <bgolaszewski@baylibre.com>2020-11-25 15:36:52 +0100
commit696868d0a79c211b51d0d0f7a1e6805e12d7fb42 (patch)
tree4bd090af37a40a3ae8ff998bb961bfa039946839 /drivers/gpio
parent0c2c7e1323b44548c10f899df565e4c4154600f1 (diff)
gpio: exar: unduplicate address and offset computation
Provide and use helpers for calculating the register address and bit offset instead of hand coding it in every function. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-exar.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
index db366d85b6b4..28b0b4b5fa35 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -33,6 +33,26 @@ struct exar_gpio_chip {
unsigned int first_pin;
};
+static unsigned int
+exar_offset_to_sel_addr(struct exar_gpio_chip *exar_gpio, unsigned int offset)
+{
+ return (offset + exar_gpio->first_pin) / 8 ? EXAR_OFFSET_MPIOSEL_HI
+ : EXAR_OFFSET_MPIOSEL_LO;
+}
+
+static unsigned int
+exar_offset_to_lvl_addr(struct exar_gpio_chip *exar_gpio, unsigned int offset)
+{
+ return (offset + exar_gpio->first_pin) / 8 ? EXAR_OFFSET_MPIOLVL_HI
+ : EXAR_OFFSET_MPIOLVL_LO;
+}
+
+static unsigned int
+exar_offset_to_bit(struct exar_gpio_chip *exar_gpio, unsigned int offset)
+{
+ return (offset + exar_gpio->first_pin) % 8;
+}
+
static void exar_update(struct gpio_chip *chip, unsigned int reg, int val,
unsigned int offset)
{
@@ -52,9 +72,8 @@ static int exar_set_direction(struct gpio_chip *chip, int direction,
unsigned int offset)
{
struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip);
- unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?
- EXAR_OFFSET_MPIOSEL_HI : EXAR_OFFSET_MPIOSEL_LO;
- unsigned int bit = (offset + exar_gpio->first_pin) % 8;
+ unsigned int addr = exar_offset_to_sel_addr(exar_gpio, offset);
+ unsigned int bit = exar_offset_to_bit(exar_gpio, offset);
exar_update(chip, addr, direction, bit);
return 0;
@@ -75,9 +94,8 @@ static int exar_get(struct gpio_chip *chip, unsigned int reg)
static int exar_get_direction(struct gpio_chip *chip, unsigned int offset)
{
struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip);
- unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?
- EXAR_OFFSET_MPIOSEL_HI : EXAR_OFFSET_MPIOSEL_LO;
- unsigned int bit = (offset + exar_gpio->first_pin) % 8;
+ unsigned int addr = exar_offset_to_sel_addr(exar_gpio, offset);
+ unsigned int bit = exar_offset_to_bit(exar_gpio, offset);
if (exar_get(chip, addr) & BIT(bit))
return GPIO_LINE_DIRECTION_IN;
@@ -88,9 +106,8 @@ static int exar_get_direction(struct gpio_chip *chip, unsigned int offset)
static int exar_get_value(struct gpio_chip *chip, unsigned int offset)
{
struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip);
- unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?
- EXAR_OFFSET_MPIOLVL_HI : EXAR_OFFSET_MPIOLVL_LO;
- unsigned int bit = (offset + exar_gpio->first_pin) % 8;
+ unsigned int addr = exar_offset_to_lvl_addr(exar_gpio, offset);
+ unsigned int bit = exar_offset_to_bit(exar_gpio, offset);
return !!(exar_get(chip, addr) & BIT(bit));
}
@@ -99,9 +116,8 @@ static void exar_set_value(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip);
- unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?
- EXAR_OFFSET_MPIOLVL_HI : EXAR_OFFSET_MPIOLVL_LO;
- unsigned int bit = (offset + exar_gpio->first_pin) % 8;
+ unsigned int addr = exar_offset_to_lvl_addr(exar_gpio, offset);
+ unsigned int bit = exar_offset_to_bit(exar_gpio, offset);
exar_update(chip, addr, value, bit);
}