diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.14/001-spi-spi-gpio-Add-dt-support-for-a-single-device-with.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.14/001-spi-spi-gpio-Add-dt-support-for-a-single-device-with.patch | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/target/linux/brcm63xx/patches-3.14/001-spi-spi-gpio-Add-dt-support-for-a-single-device-with.patch b/target/linux/brcm63xx/patches-3.14/001-spi-spi-gpio-Add-dt-support-for-a-single-device-with.patch deleted file mode 100644 index d4a36e8e39..0000000000 --- a/target/linux/brcm63xx/patches-3.14/001-spi-spi-gpio-Add-dt-support-for-a-single-device-with.patch +++ /dev/null @@ -1,91 +0,0 @@ -From d1d81802522ade84128a2c66c0d500e372474dca Mon Sep 17 00:00:00 2001 -From: Torsten Fleischer <torfl6749@gmail.com> -Date: Mon, 3 Nov 2014 17:17:55 +0100 -Subject: [PATCH] spi: spi-gpio: Add dt support for a single device with no - chip select - -In order to describe a single slave device that has no chip select line -the 'num-chipselects' property has to be <0> and the 'cs-gpios' property -doesn't need to be set. - -Signed-off-by: Torsten Fleischer <torfl6749@gmail.com> -Signed-off-by: Mark Brown <broonie@kernel.org> ---- - Documentation/devicetree/bindings/spi/spi-gpio.txt | 6 ++++-- - drivers/spi/spi-gpio.c | 21 +++++++++++++++------ - 2 files changed, 19 insertions(+), 8 deletions(-) - ---- a/Documentation/devicetree/bindings/spi/spi-gpio.txt -+++ b/Documentation/devicetree/bindings/spi/spi-gpio.txt -@@ -8,8 +8,10 @@ Required properties: - - gpio-sck: GPIO spec for the SCK line to use - - gpio-miso: GPIO spec for the MISO line to use - - gpio-mosi: GPIO spec for the MOSI line to use -- - cs-gpios: GPIOs to use for chipselect lines -- - num-chipselects: number of chipselect lines -+ - cs-gpios: GPIOs to use for chipselect lines. -+ Not needed if num-chipselects = <0>. -+ - num-chipselects: Number of chipselect lines. Should be <0> if a single device -+ with no chip select is connected. - - Example: - ---- a/drivers/spi/spi-gpio.c -+++ b/drivers/spi/spi-gpio.c -@@ -425,6 +425,7 @@ static int spi_gpio_probe(struct platfor - struct spi_gpio_platform_data *pdata; - u16 master_flags = 0; - bool use_of = 0; -+ int num_devices; - - status = spi_gpio_probe_dt(pdev); - if (status < 0) -@@ -434,16 +435,21 @@ static int spi_gpio_probe(struct platfor - - pdata = dev_get_platdata(&pdev->dev); - #ifdef GENERIC_BITBANG -- if (!pdata || !pdata->num_chipselect) -+ if (!pdata || (!use_of && !pdata->num_chipselect)) - return -ENODEV; - #endif - -+ if (use_of && !SPI_N_CHIPSEL) -+ num_devices = 1; -+ else -+ num_devices = SPI_N_CHIPSEL; -+ - status = spi_gpio_request(pdata, dev_name(&pdev->dev), &master_flags); - if (status < 0) - return status; - - master = spi_alloc_master(&pdev->dev, sizeof(*spi_gpio) + -- (sizeof(int) * SPI_N_CHIPSEL)); -+ (sizeof(int) * num_devices)); - if (!master) { - status = -ENOMEM; - goto gpio_free; -@@ -458,7 +464,7 @@ static int spi_gpio_probe(struct platfor - master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); - master->flags = master_flags; - master->bus_num = pdev->id; -- master->num_chipselect = SPI_N_CHIPSEL; -+ master->num_chipselect = num_devices; - master->setup = spi_gpio_setup; - master->cleanup = spi_gpio_cleanup; - #ifdef CONFIG_OF -@@ -473,9 +479,12 @@ static int spi_gpio_probe(struct platfor - * property of the node. - */ - -- for (i = 0; i < SPI_N_CHIPSEL; i++) -- spi_gpio->cs_gpios[i] = -- of_get_named_gpio(np, "cs-gpios", i); -+ if (!SPI_N_CHIPSEL) -+ spi_gpio->cs_gpios[0] = SPI_GPIO_NO_CHIPSELECT; -+ else -+ for (i = 0; i < SPI_N_CHIPSEL; i++) -+ spi_gpio->cs_gpios[i] = -+ of_get_named_gpio(np, "cs-gpios", i); - } - #endif - |