Signed-off-by: Álvaro Fernández Rojas <nolt...@gmail.com>
---
diff --git
a/target/linux/brcm63xx/patches-3.14/376-DT-SPI-GPIO-no-cs-backport.patch
b/target/linux/brcm63xx/patches-3.14/376-DT-SPI-GPIO-no-cs-backport.patch
new file mode 100644
index 0000000..b289d5c
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.14/376-DT-SPI-GPIO-no-cs-backport.patch
@@ -0,0 +1,78 @@
+diff --git a/Documentation/devicetree/bindings/spi/spi-gpio.txt
b/Documentation/devicetree/bindings/spi/spi-gpio.txt
+index 8a824be..a95603b 100644
+--- 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:
+
+diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
+index 9f59553..f0492c9 100644
+--- a/drivers/spi/spi-gpio.c
++++ b/drivers/spi/spi-gpio.c
+@@ -413,6 +413,7 @@ static int spi_gpio_probe(struct platform_device *pdev)
+ 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)
+@@ -422,16 +423,21 @@ static int spi_gpio_probe(struct platform_device *pdev)
+
+ 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;
+@@ -446,7 +452,7 @@ static int spi_gpio_probe(struct platform_device *pdev)
+ 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
+@@ -461,9 +467,12 @@ static int spi_gpio_probe(struct platform_device *pdev)
+ * 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
+
diff --git
a/target/linux/brcm63xx/patches-3.18/376-DT-SPI-GPIO-no-cs-backport.patch
b/target/linux/brcm63xx/patches-3.18/376-DT-SPI-GPIO-no-cs-backport.patch
new file mode 100644
index 0000000..b289d5c
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.18/376-DT-SPI-GPIO-no-cs-backport.patch
@@ -0,0 +1,78 @@
+diff --git a/Documentation/devicetree/bindings/spi/spi-gpio.txt
b/Documentation/devicetree/bindings/spi/spi-gpio.txt
+index 8a824be..a95603b 100644
+--- 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:
+
+diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
+index 9f59553..f0492c9 100644
+--- a/drivers/spi/spi-gpio.c
++++ b/drivers/spi/spi-gpio.c
+@@ -413,6 +413,7 @@ static int spi_gpio_probe(struct platform_device *pdev)
+ 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)
+@@ -422,16 +423,21 @@ static int spi_gpio_probe(struct platform_device *pdev)
+
+ 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;
+@@ -446,7 +452,7 @@ static int spi_gpio_probe(struct platform_device *pdev)
+ 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
+@@ -461,9 +467,12 @@ static int spi_gpio_probe(struct platform_device *pdev)
+ * 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
+
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