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92 lines
2.1 KiB
Diff
92 lines
2.1 KiB
Diff
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From 3a1689ea752436917c5ce4487527ed6c444630ee Mon Sep 17 00:00:00 2001
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From: Stefan Wahren <stefan.wahren@i2se.com>
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Date: Wed, 16 Nov 2016 17:52:07 +0000
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Subject: [PATCH] ARM: bcm2835: Add names for the RPi Zero GPIO lines
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This adds the GPIO names for the Raspberry Pi Zero. The GPIO lines
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of the RPi Zero are almost identical to the Model A+ except:
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* GPIO 35, 38, 40 and 45 are not connected
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* Status LED is active low
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Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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arch/arm/boot/dts/bcm2835-rpi-zero.dts | 65 ++++++++++++++++++++++++++++++++++
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1 file changed, 65 insertions(+)
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--- a/arch/arm/boot/dts/bcm2835-rpi-zero.dts
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+++ b/arch/arm/boot/dts/bcm2835-rpi-zero.dts
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@@ -26,6 +26,71 @@
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};
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&gpio {
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+ /*
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+ * This is based on the official GPU firmware DT blob.
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+ *
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+ * Legend:
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+ * "NC" = not connected (no rail from the SoC)
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+ * "FOO" = GPIO line named "FOO" on the schematic
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+ * "FOO_N" = GPIO line named "FOO" on schematic, active low
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+ */
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+ gpio-line-names = "SDA0",
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+ "SCL0",
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+ "SDA1",
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+ "SCL1",
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+ "GPIO_GCLK",
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+ "GPIO5",
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+ "GPIO6",
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+ "SPI_CE1_N",
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+ "SPI_CE0_N",
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+ "SPI_MISO",
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+ "SPI_MOSI",
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+ "SPI_SCLK",
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+ "GPIO12",
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+ "GPIO13",
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+ /* Serial port */
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+ "TXD0",
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+ "RXD0",
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+ "GPIO16",
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+ "GPIO17",
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+ "GPIO18",
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+ "GPIO19",
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+ "GPIO20",
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+ "GPIO21",
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+ "GPIO22",
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+ "GPIO23",
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+ "GPIO24",
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+ "GPIO25",
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+ "GPIO26",
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+ "GPIO27",
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+ "SDA0",
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+ "SCL0",
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+ "NC", /* GPIO30 */
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+ "NC", /* GPIO31 */
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+ "CAM_GPIO1", /* GPIO32 */
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+ "NC", /* GPIO33 */
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+ "NC", /* GPIO34 */
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+ "NC", /* GPIO35 */
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+ "NC", /* GPIO36 */
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+ "NC", /* GPIO37 */
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+ "NC", /* GPIO38 */
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+ "NC", /* GPIO39 */
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+ "NC", /* GPIO40 */
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+ "CAM_GPIO0", /* GPIO41 */
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+ "NC", /* GPIO42 */
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+ "NC", /* GPIO43 */
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+ "NC", /* GPIO44 */
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+ "NC", /* GPIO45 */
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+ "HDMI_HPD_N",
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+ "STATUS_LED_N",
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+ /* Used by SD Card */
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+ "SD_CLK_R",
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+ "SD_CMD_R",
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+ "SD_DATA0_R",
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+ "SD_DATA1_R",
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+ "SD_DATA2_R",
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+ "SD_DATA3_R";
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+
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pinctrl-0 = <&gpioout &alt0 &i2s_alt0>;
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/* I2S interface */
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