From c77c54e6845c201483a75dfc931f7065d3d35c84 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Sun, 15 Feb 2015 19:45:29 +0000 Subject: ar71xx: add v3.18 support Signed-off-by: John Crispin git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44456 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- ...io-74x164-improve-platform-device-support.patch | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 target/linux/ar71xx/patches-3.18/451-gpio-74x164-improve-platform-device-support.patch (limited to 'target/linux/ar71xx/patches-3.18/451-gpio-74x164-improve-platform-device-support.patch') diff --git a/target/linux/ar71xx/patches-3.18/451-gpio-74x164-improve-platform-device-support.patch b/target/linux/ar71xx/patches-3.18/451-gpio-74x164-improve-platform-device-support.patch new file mode 100644 index 0000000000..ed95f5e25e --- /dev/null +++ b/target/linux/ar71xx/patches-3.18/451-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 -- cgit v1.2.3