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Commit 9c6c149b authored by Jesper Nilsson's avatar Jesper Nilsson Committed by Linus Walleij

pinctrl: Add bindings for ARTPEC-6 pinmux

Add the bindings for the pinmux functions in the
ARTPEC-6 SoC, including bias and drive strength.
Signed-off-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Rob Herring's avatarRob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij's avatarLinus Walleij <linus.walleij@linaro.org>
parent 4781c22c
Axis ARTPEC-6 Pin Controller
Required properties:
- compatible: "axis,artpec6-pinctrl".
- reg: Should contain the register physical address and length for the pin
controller.
A pinctrl node should contain at least one subnode representing the pinctrl
groups available on the machine. Each subnode will list the mux function
required and what pin group it will use. Each subnode will also configure the
drive strength and bias pullup of the pin group. If either of these options is
not set, its actual value will be unspecified.
Required subnode-properties:
- function: Function to mux.
- groups: Name of the pin group to use for the function above.
Available functions and groups (function: group0, group1...):
gpio: cpuclkoutgrp0, udlclkoutgrp0, i2c1grp0, i2c2grp0,
i2c3grp0, i2s0grp0, i2s1grp0, i2srefclkgrp0, spi0grp0,
spi1grp0, pciedebuggrp0, uart0grp0, uart0grp1, uart1grp0,
uart2grp0, uart2grp1, uart3grp0, uart4grp0, uart5grp0
cpuclkout: cpuclkoutgrp0
udlclkout: udlclkoutgrp0
i2c1: i2c1grp0
i2c2: i2c2grp0
i2c3: i2c3grp0
i2s0: i2s0grp0
i2s1: i2s1grp0
i2srefclk: i2srefclkgrp0
spi0: spi0grp0
spi1: spi1grp0
pciedebug: pciedebuggrp0
uart0: uart0grp0, uart0grp1
uart1: uart1grp0
uart2: uart2grp0, uart2grp1
uart3: uart3grp0
uart4: uart4grp0
uart5: uart5grp0
nand: nandgrp0
sdio0: sdio0grp0
sdio1: sdio1grp0
ethernet: ethernetgrp0
Optional subnode-properties (see pinctrl-bindings.txt):
- drive-strength: 4, 6, 8, 9 mA. For SD and NAND pins, this is for 3.3V VCCQ3.
- bias-pull-up
- bias-disable
Examples:
pinctrl@f801d000 {
compatible = "axis,artpec6-pinctrl";
reg = <0xf801d000 0x400>;
pinctrl_uart0: uart0grp {
function = "uart0";
groups = "uart0grp0";
drive-strength = <4>;
bias-pull-up;
};
pinctrl_uart3: uart3grp {
function = "uart3";
groups = "uart3grp0";
};
};
uart0: uart@f8036000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0xf8036000 0x1000>;
interrupts = <0 104 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&pll2div24>, <&apb_pclk>;
clock-names = "uart_clk", "apb_pclk";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart0>;
};
uart3: uart@f8039000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0xf8039000 0x1000>;
interrupts = <0 128 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&pll2div24>, <&apb_pclk>;
clock-names = "uart_clk", "apb_pclk";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart3>;
};
......@@ -1088,6 +1088,7 @@ L: linux-arm-kernel@axis.com
F: arch/arm/mach-artpec
F: arch/arm/boot/dts/artpec6*
F: drivers/clk/axis
F: Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt
ARM/ASPEED MACHINE SUPPORT
M: Joel Stanley <joel@jms.id.au>
......
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