From: Eric Anholt <e...@anholt.net>

The BCM2835-ARM-Peripherals.pdf documentation specifies what the
function selects do for the pins, and there are a bunch of obvious
groupings to be made.  With these created, we'll be able to replace
bcm2835-rpi.dtsi's main "set all of these pins to alt0" with
references to specific groups we want enabled.

Also add pinctrl groups for emmc and sdhost.

Based on patches by Eric Anholt <e...@anholt.net>

Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
 arch/arm/boot/dts/bcm283x.dtsi | 203 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 203 insertions(+)

diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
index 4d9f3ab..68d559e 100644
--- a/arch/arm/boot/dts/bcm283x.dtsi
+++ b/arch/arm/boot/dts/bcm283x.dtsi
@@ -131,6 +131,209 @@
 
                        interrupt-controller;
                        #interrupt-cells = <2>;
+
+                       /* Defines pin muxing groups according to
+                        * BCM2835-ARM-Peripherals.pdf page 102.
+                        *
+                        * While each pin can have its mux selected
+                        * for various functions individually, some
+                        * groups only make sense to switch to a
+                        * particular function together.
+                        */
+                       dpi_gpio0: dpi_gpio0 {
+                               brcm,pins = <0 1 2 3 4 5 6 7 8 9 10 11
+                                            12 13 14 15 16 17 18 19
+                                            20 21 22 23 24 25 26 27>;
+                               brcm,function = <BCM2835_FSEL_ALT2>;
+                       };
+                       emmc_gpio22: emmc_gpio22 {
+                               brcm,pins = <22 23 24 25 26 27>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                       };
+                       emmc_gpio34: emmc_gpio34 {
+                               brcm,pins = <34 35 36 37 38 39>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                               brcm,pull = <BCM2835_PUD_OFF
+                                            BCM2835_PUD_UP
+                                            BCM2835_PUD_UP
+                                            BCM2835_PUD_UP
+                                            BCM2835_PUD_UP
+                                            BCM2835_PUD_UP>;
+                       };
+                       emmc_gpio48: emmc_gpio48 {
+                               brcm,pins = <48 49 50 51 52 53>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                       };
+
+                       gpclk0_gpio4: gpclk0_gpio4 {
+                               brcm,pins = <4>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       gpclk1_gpio5: gpclk1_gpio5 {
+                               brcm,pins = <5>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       gpclk1_gpio42: gpclk1_gpio42 {
+                               brcm,pins = <42>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       gpclk1_gpio44: gpclk1_gpio44 {
+                               brcm,pins = <44>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       gpclk2_gpio6: gpclk2_gpio6 {
+                               brcm,pins = <6>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       gpclk2_gpio43: gpclk2_gpio43 {
+                               brcm,pins = <43>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+
+                       i2c0_gpio0: i2c0_gpio0 {
+                               brcm,pins = <0 1>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       i2c0_gpio32: i2c0_gpio32 {
+                               brcm,pins = <32 34>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       i2c0_gpio44: i2c0_gpio44 {
+                               brcm,pins = <44 45>;
+                               brcm,function = <BCM2835_FSEL_ALT1>;
+                       };
+                       i2c1_gpio2: i2c1_gpio2 {
+                               brcm,pins = <2 3>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       i2c1_gpio44: i2c1_gpio44 {
+                               brcm,pins = <44 45>;
+                               brcm,function = <BCM2835_FSEL_ALT2>;
+                       };
+                       i2c_slave_gpio18: i2c_slave_gpio18 {
+                               brcm,pins = <18 19 20 21>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                       };
+
+                       jtag_gpio4: jtag_gpio4 {
+                               brcm,pins = <4 5 6 12 13>;
+                               brcm,function = <BCM2835_FSEL_ALT4>;
+                       };
+                       jtag_gpio22: jtag_gpio22 {
+                               brcm,pins = <22 23 24 25 26 27>;
+                               brcm,function = <BCM2835_FSEL_ALT4>;
+                       };
+
+                       pcm_gpio18: pcm_gpio18 {
+                               brcm,pins = <18 19 20 21>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       pcm_gpio28: pcm_gpio28 {
+                               brcm,pins = <28 29 30 31>;
+                               brcm,function = <BCM2835_FSEL_ALT2>;
+                       };
+
+                       pwm0_gpio12: pwm0_gpio12 {
+                               brcm,pins = <12>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       pwm0_gpio18: pwm0_gpio18 {
+                               brcm,pins = <18>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       pwm0_gpio40: pwm0_gpio40 {
+                               brcm,pins = <40>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       pwm1_gpio13: pwm1_gpio13 {
+                               brcm,pins = <13>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       pwm1_gpio19: pwm1_gpio19 {
+                               brcm,pins = <19>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       pwm1_gpio41: pwm1_gpio41 {
+                               brcm,pins = <41>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       pwm1_gpio45: pwm1_gpio45 {
+                               brcm,pins = <45>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+
+                       sdhost_gpio48: sdhost_gpio48 {
+                               brcm,pins = <48 49 50 51 52 53>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+
+                       spi0_gpio7: spi0_gpio7 {
+                               brcm,pins = <7 8 9 10 11>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       spi0_gpio35: spi0_gpio35 {
+                               brcm,pins = <35 36 37 38 39>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       spi1_gpio16: spi1_gpio16 {
+                               brcm,pins = <16 17 18 19 20 21>;
+                               brcm,function = <BCM2835_FSEL_ALT4>;
+                       };
+                       spi2_gpio40: spi2_gpio40 {
+                               brcm,pins = <40 41 42 43 44 45>;
+                               brcm,function = <BCM2835_FSEL_ALT4>;
+                       };
+
+                       uart0_gpio14: uart0_gpio14 {
+                               brcm,pins = <14 15>;
+                               brcm,function = <BCM2835_FSEL_ALT0>;
+                       };
+                       /* Separate from the uart0_gpio14 group
+                        * because it conflicts with spi1_gpio16, and
+                        * people often run uart0 on the two pins
+                        * without flow contrl.
+                        */
+                       uart0_ctsrts_gpio16: uart0_ctsrts_gpio16 {
+                               brcm,pins = <16 17>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                       };
+                       uart0_gpio30: uart0_gpio30 {
+                               brcm,pins = <30 31>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                       };
+                       uart0_ctsrts_gpio32: uart0_ctsrts_gpio32 {
+                               brcm,pins = <32 33>;
+                               brcm,function = <BCM2835_FSEL_ALT3>;
+                       };
+
+                       uart1_gpio14: uart1_gpio14 {
+                               brcm,pins = <14 15>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       uart1_ctsrts_gpio16: uart1_ctsrts_gpio16 {
+                               brcm,pins = <16 17>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       uart1_gpio32: uart1_gpio32 {
+                               brcm,pins = <32 33>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       uart1_ctsrts_gpio30: uart1_ctsrts_gpio30 {
+                               brcm,pins = <30 31>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       uart1_gpio36: uart1_gpio36 {
+                               brcm,pins = <36 37 38 39>;
+                               brcm,function = <BCM2835_FSEL_ALT2>;
+                       };
+                       uart1_gpio40: uart1_gpio40 {
+                               brcm,pins = <40 41>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
+                       uart1_ctsrts_gpio42: uart1_ctsrts_gpio42 {
+                               brcm,pins = <42 43>;
+                               brcm,function = <BCM2835_FSEL_ALT5>;
+                       };
                };
 
                uart0: serial@7e201000 {
-- 
1.8.3.1

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