diff options
author | Alexander Shiyan <shc_work@mail.ru> | 2013-12-07 14:08:23 +0400 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2013-12-12 14:28:12 +0100 |
commit | bcc0562c776e4b09c7b9f24cddb8724fbe7a3fa5 (patch) | |
tree | 44b4671b569138254e39a8b4577e840592742564 | |
parent | 61e7380403efbaf5f796e8cf979827c602bf6c50 (diff) | |
download | linux-stable-bcc0562c776e4b09c7b9f24cddb8724fbe7a3fa5.tar.gz linux-stable-bcc0562c776e4b09c7b9f24cddb8724fbe7a3fa5.tar.bz2 linux-stable-bcc0562c776e4b09c7b9f24cddb8724fbe7a3fa5.zip |
gpio: 74x164: Driver cleanup
- Removed excess "spi" field from private data.
- Removed excess check for spi_get_drvdata() in remove().
- Removed unneeded message in remove().
- Simplify error path in probe().
- Fixed warnings by scripts/checkfile.pl.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
-rw-r--r-- | drivers/gpio/gpio-74x164.c | 43 |
1 files changed, 16 insertions, 27 deletions
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c index 4d4e15ca67e0..e4ae29824c32 100644 --- a/drivers/gpio/gpio-74x164.c +++ b/drivers/gpio/gpio-74x164.c @@ -20,7 +20,6 @@ #define GEN_74X164_NUMBER_GPIOS 8 struct gen_74x164_chip { - struct spi_device *spi; u8 *buffer; struct gpio_chip gpio_chip; struct mutex lock; @@ -34,6 +33,7 @@ static struct gen_74x164_chip *gpio_to_74x164_chip(struct gpio_chip *gc) static int __gen_74x164_write_config(struct gen_74x164_chip *chip) { + struct spi_device *spi = to_spi_device(chip->gpio_chip.dev); struct spi_message message; struct spi_transfer *msg_buf; int i, ret = 0; @@ -54,12 +54,12 @@ static int __gen_74x164_write_config(struct gen_74x164_chip *chip) * byte of the buffer will end up in the last register. */ for (i = chip->registers - 1; i >= 0; i--) { - msg_buf[i].tx_buf = chip->buffer +i; + msg_buf[i].tx_buf = chip->buffer + i; msg_buf[i].len = sizeof(u8); spi_message_add_tail(msg_buf + i, &message); } - ret = spi_sync(chip->spi, &message); + ret = spi_sync(spi, &message); kfree(msg_buf); @@ -122,35 +122,32 @@ static int gen_74x164_probe(struct spi_device *spi) if (!chip) return -ENOMEM; - mutex_init(&chip->lock); - spi_set_drvdata(spi, chip); - chip->spi = spi; - chip->gpio_chip.label = spi->modalias; chip->gpio_chip.direction_output = gen_74x164_direction_output; chip->gpio_chip.get = gen_74x164_get_value; chip->gpio_chip.set = gen_74x164_set_value; chip->gpio_chip.base = -1; - if (of_property_read_u32(spi->dev.of_node, "registers-number", &chip->registers)) { - dev_err(&spi->dev, "Missing registers-number property in the DT.\n"); - ret = -EINVAL; - goto exit_destroy; + if (of_property_read_u32(spi->dev.of_node, "registers-number", + &chip->registers)) { + dev_err(&spi->dev, + "Missing registers-number property in the DT.\n"); + return -EINVAL; } chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers; chip->buffer = devm_kzalloc(&spi->dev, chip->registers, GFP_KERNEL); - if (!chip->buffer) { - ret = -ENOMEM; - goto exit_destroy; - } + if (!chip->buffer) + return -ENOMEM; chip->gpio_chip.can_sleep = true; chip->gpio_chip.dev = &spi->dev; chip->gpio_chip.owner = THIS_MODULE; + mutex_init(&chip->lock); + ret = __gen_74x164_write_config(chip); if (ret) { dev_err(&spi->dev, "Failed writing: %d\n", ret); @@ -158,31 +155,23 @@ static int gen_74x164_probe(struct spi_device *spi) } ret = gpiochip_add(&chip->gpio_chip); - if (ret) - goto exit_destroy; - - return ret; + if (!ret) + return 0; exit_destroy: mutex_destroy(&chip->lock); + return ret; } static int gen_74x164_remove(struct spi_device *spi) { - struct gen_74x164_chip *chip; + struct gen_74x164_chip *chip = spi_get_drvdata(spi); int ret; - chip = spi_get_drvdata(spi); - if (chip == NULL) - return -ENODEV; - ret = gpiochip_remove(&chip->gpio_chip); if (!ret) mutex_destroy(&chip->lock); - else - dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n", - ret); return ret; } |