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author | Felix Fietkau <nbd@openwrt.org> | 2014-08-07 12:40:53 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2014-08-07 12:40:53 +0000 |
commit | e41a0cafff16f2443e587884782172c6d8478771 (patch) | |
tree | 2ab441d85607622857c5d7602918d24312daa7ab /target/linux/ar71xx/patches-3.14/451-gpio-74x164-improve-platform-device-support.patch | |
parent | f75f9606ad6af9f4c62acd45741a7e3880ad7dbb (diff) | |
download | master-31e0f0ae-e41a0cafff16f2443e587884782172c6d8478771.tar.gz master-31e0f0ae-e41a0cafff16f2443e587884782172c6d8478771.tar.bz2 master-31e0f0ae-e41a0cafff16f2443e587884782172c6d8478771.zip |
ar71xx: add linux 3.14 support
Signed-off-by: Zhao, Gang <gang.zhao.42@gmail.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 42038
Diffstat (limited to 'target/linux/ar71xx/patches-3.14/451-gpio-74x164-improve-platform-device-support.patch')
-rw-r--r-- | target/linux/ar71xx/patches-3.14/451-gpio-74x164-improve-platform-device-support.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.14/451-gpio-74x164-improve-platform-device-support.patch b/target/linux/ar71xx/patches-3.14/451-gpio-74x164-improve-platform-device-support.patch new file mode 100644 index 0000000000..ed95f5e25e --- /dev/null +++ b/target/linux/ar71xx/patches-3.14/451-gpio-74x164-improve-platform-device-support.patch @@ -0,0 +1,70 @@ +--- a/drivers/gpio/gpio-74x164.c ++++ b/drivers/gpio/gpio-74x164.c +@@ -107,8 +107,18 @@ static int gen_74x164_direction_output(s + static int gen_74x164_probe(struct spi_device *spi) + { + struct gen_74x164_chip *chip; ++ struct gen_74x164_chip_platform_data *pdata; ++ struct device_node *np; + int ret; + ++ pdata = spi->dev.platform_data; ++ np = spi->dev.of_node; ++ ++ if (!np && !pdata) { ++ dev_err(&spi->dev, "No configuration data available.\n"); ++ return -EINVAL; ++ } ++ + /* + * bits_per_word cannot be configured in platform data + */ +@@ -130,18 +140,27 @@ static int gen_74x164_probe(struct spi_d + 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"); +- return -EINVAL; ++ if (np) { ++ 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; ++ } ++ } else if (pdata) { ++ chip->registers = pdata->num_registers; + } + ++ if (!chip->registers) ++ chip->registers = 1; ++ + chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers; + chip->buffer = devm_kzalloc(&spi->dev, chip->registers, GFP_KERNEL); + if (!chip->buffer) + return -ENOMEM; + ++ if (pdata && pdata->init_data) ++ memcpy(chip->buffer, pdata->init_data, chip->registers); ++ + chip->gpio_chip.can_sleep = true; + chip->gpio_chip.dev = &spi->dev; + chip->gpio_chip.owner = THIS_MODULE; +--- /dev/null ++++ b/include/linux/spi/74x164.h +@@ -0,0 +1,13 @@ ++#ifndef LINUX_SPI_74X164_H ++#define LINUX_SPI_74X164_H ++ ++struct gen_74x164_chip_platform_data { ++ /* number assigned to the first GPIO */ ++ unsigned base; ++ /* number of chained registers */ ++ unsigned num_registers; ++ /* address of a buffer containing initial data */ ++ u8 *init_data; ++}; ++ ++#endif |