diff options
| author | Bartosz Golaszewski <brgl@bgdev.pl> | 2017-06-09 14:41:28 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-06-20 10:18:55 +0300 |
| commit | b652336d3fb70b95a5b0a5ea3a32e7116b15be29 (patch) | |
| tree | 9eb90868ac9f4afe3b88e80fa33ec0e41361a178 /drivers | |
| parent | b6c2e77d34ff775e4cf4ca803877dafd74737551 (diff) | |
| download | linux-b652336d3fb70b95a5b0a5ea3a32e7116b15be29.tar.xz | |
gpio: mockup: improve readability
We currently shift bits here and there without actually explaining
what we're doing. Add some helper variables with names indicating
their purpose to improve the code readability.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-mockup.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index d95d37aeb91f..0cb6cbacc069 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -27,6 +27,11 @@ #define GPIO_MOCKUP_NAME "gpio-mockup" #define GPIO_MOCKUP_MAX_GC 10 +/* + * We're storing two values per chip: the GPIO base and the number + * of GPIO lines. + */ +#define GPIO_MOCKUP_MAX_RANGES (GPIO_MOCKUP_MAX_GC * 2) enum { GPIO_MOCKUP_DIR_OUT = 0, @@ -62,7 +67,7 @@ struct gpio_mockup_dbgfs_private { int offset; }; -static int gpio_mockup_ranges[GPIO_MOCKUP_MAX_GC << 1]; +static int gpio_mockup_ranges[GPIO_MOCKUP_MAX_RANGES]; static int gpio_mockup_params_nr; module_param_array(gpio_mockup_ranges, int, &gpio_mockup_params_nr, 0400); @@ -329,23 +334,24 @@ static int gpio_mockup_add(struct device *dev, static int gpio_mockup_probe(struct platform_device *pdev) { - struct gpio_mockup_chip *chips; + int ret, i, base, ngpio, num_chips; struct device *dev = &pdev->dev; - int ret, i, base, ngpio; + struct gpio_mockup_chip *chips; char *chip_name; if (gpio_mockup_params_nr < 2 || (gpio_mockup_params_nr % 2)) return -EINVAL; - chips = devm_kzalloc(dev, - sizeof(*chips) * (gpio_mockup_params_nr >> 1), - GFP_KERNEL); + /* Each chip is described by two values. */ + num_chips = gpio_mockup_params_nr / 2; + + chips = devm_kzalloc(dev, sizeof(*chips) * num_chips, GFP_KERNEL); if (!chips) return -ENOMEM; platform_set_drvdata(pdev, chips); - for (i = 0; i < gpio_mockup_params_nr >> 1; i++) { + for (i = 0; i < num_chips; i++) { base = gpio_mockup_ranges[i * 2]; if (base == -1) |