diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2016-10-06 13:15:02 +0200 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2016-11-11 09:07:01 -0800 |
| commit | 731b26a6ac17f24057c559361c6d0cb7cb79baed (patch) | |
| tree | 98d7d4da21d52a6a95e4ca041dc84ef50e752f4e /arch/arm/boot/dts/bcm2835-rpi-b.dts | |
| parent | 43bac4133f405b67857e4c985aecc44a57233bfe (diff) | |
ARM: bcm2835: Add names for the Raspberry Pi GPIO lines
The idea is to give useful names to GPIO lines that an implementer
will be using from userspace, e.g. for maker type projects. These are
user-visible using tools/gpio/lsgpio.c
v2: Major rewrite by anholt: Flatten each GPIO line to a line in the
file for better diffing, prefix all expansion header pins with
"P<number>" or "P5HEADER_P<number>" and drop the mostly-unused
GPIO_GEN<smallnumber> names in favor of GPIO<socgpionumber>, fix
extra '[]' on a couple of lines, fix locations of SD_CARD_DETECT,
CAM_GPIO and STATUS_LED, fix HDMI_HPD polarities, rewrite A+ using
unreleased schematics.
v3: More changes by anholt: Drop P<number> / P5HEADER<number>
prefixes. I had been skeptical about adding them, and was
convinced to drop them by Gottfried (who probably has more
experience with GPIOs in educational contexts than the rest of
us). Also drop [] brackets for "is pinmuxed", which didn't seem
to clarify, and were ambiguous for things like the SPI_*-labeled
pins which may or may not actually be pinmuxed to SPI.
v4: Rename B+'s SDA0/SCL0 to match the other boards, despite the
naming on its schematic.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'arch/arm/boot/dts/bcm2835-rpi-b.dts')
| -rw-r--r-- | arch/arm/boot/dts/bcm2835-rpi-b.dts | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts index 76a254b3219a..71f50e16c646 100644 --- a/arch/arm/boot/dts/bcm2835-rpi-b.dts +++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts @@ -16,6 +16,73 @@ }; &gpio { + /* + * Taken from Raspberry-Pi-Rev-1.0-Model-AB-Schematics.pdf + * RPI00021 sheet 02 + * + * Legend: + * "NC" = not connected (no rail from the SoC) + * "FOO" = GPIO line named "FOO" on the schematic + * "FOO_N" = GPIO line named "FOO" on schematic, active low + */ + gpio-line-names = "SDA0", + "SCL0", + "SDA1", + "SCL1", + "GPIO_GCLK", + "CAM_CLK", + "LAN_RUN", + "SPI_CE1_N", + "SPI_CE0_N", + "SPI_MISO", + "SPI_MOSI", + "SPI_SCLK", + "NC", /* GPIO12 */ + "NC", /* GPIO13 */ + /* Serial port */ + "TXD0", + "RXD0", + "STATUS_LED_N", + "GPIO17", + "GPIO18", + "NC", /* GPIO19 */ + "NC", /* GPIO20 */ + "GPIO21", + "GPIO22", + "GPIO23", + "GPIO24", + "GPIO25", + "NC", /* GPIO26 */ + "CAM_GPIO", + /* Binary number representing build/revision */ + "CONFIG0", + "CONFIG1", + "CONFIG2", + "CONFIG3", + "NC", /* GPIO32 */ + "NC", /* GPIO33 */ + "NC", /* GPIO34 */ + "NC", /* GPIO35 */ + "NC", /* GPIO36 */ + "NC", /* GPIO37 */ + "NC", /* GPIO38 */ + "NC", /* GPIO39 */ + "PWM0_OUT", + "NC", /* GPIO41 */ + "NC", /* GPIO42 */ + "NC", /* GPIO43 */ + "NC", /* GPIO44 */ + "PWM1_OUT", + "HDMI_HPD_P", + "SD_CARD_DET", + /* Used by SD Card */ + "SD_CLK_R", + "SD_CMD_R", + "SD_DATA0_R", + "SD_DATA1_R", + "SD_DATA2_R", + "SD_DATA3_R"; + pinctrl-0 = <&gpioout &alt0>; }; |