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Commit 5aad0db1 authored by Christian Ruppert's avatar Christian Ruppert Committed by Linus Walleij
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pinctrl: add TB10x pin control driver 



The pinmux driver of the Abilis Systems TB10x platform based on ARC700 CPUs.
Used to control the pinmux and is a prerequisite for the GPIO driver.

Signed-off-by: default avatarChristian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: default avatarPierrick Hascoet <pierrick.hascoet@abilis.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 586a87e6

Documentation/devicetree/bindings/pinctrl/abilis,tb10x-iomux.txt

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Abilis Systems TB10x pin controller

===================================



Required properties

-------------------



- compatible: should be "abilis,tb10x-iomux";

- reg: should contain the physical address and size of the pin controller's

  register range.





Function definitions

--------------------



Functions are defined (and referenced) by sub-nodes of the pin controller.

Every sub-node defines exactly one function (implying a set of pins).

Every function is associated to one named pin group inside the pin controller

driver and these names are used to associate pin group predefinitions to pin

controller sub-nodes.



Required function definition subnode properties:

  - abilis,function: should be set to the name of the function's pin group.



The following pin groups are available:

  - GPIO ports: gpioa, gpiob, gpioc, gpiod, gpioe, gpiof, gpiog,

                gpioh, gpioi, gpioj, gpiok, gpiol, gpiom, gpion

  - Serial TS input ports: mis0, mis1, mis2, mis3, mis4, mis5, mis6, mis7

  - Parallel TS input ports: mip1, mip3, mip5, mip7

  - Serial TS output ports: mos0, mos1, mos2, mos3

  - Parallel TS output port: mop

  - CI+ port: ciplus

  - CableCard (Mcard) port: mcard

  - Smart card ports: stc0, stc1

  - UART ports: uart0, uart1

  - SPI ports: spi1, spi3

  - JTAG: jtag



All other ports of the chip are not multiplexed and thus not managed by this

driver.





GPIO ranges definition

----------------------



The named pin groups of GPIO ports can be used to define GPIO ranges as

explained in Documentation/devicetree/bindings/gpio/gpio.txt.





Example

-------



iomux: iomux@FF10601c {

	compatible = "abilis,tb10x-iomux";

	reg = <0xFF10601c 0x4>;

	pctl_gpio_a: pctl-gpio-a {

		abilis,function = "gpioa";

	};

	pctl_uart0: pctl-uart0 {

		abilis,function = "uart0";

	};

};

uart@FF100000 {

	compatible = "snps,dw-apb-uart";

	reg = <0xFF100000 0x100>;

	clock-frequency = <166666666>;

	interrupts = <25 1>;

	reg-shift = <2>;

	reg-io-width = <4>;

	pinctrl-names = "default";

	pinctrl-0 = <&pctl_uart0>;

};

gpioa: gpio@FF140000 {

	compatible = "abilis,tb10x-gpio";

	reg = <0xFF140000 0x1000>;

	gpio-controller;

	#gpio-cells = <2>;

	ngpio = <3>;

	gpio-ranges = <&iomux 0 0>;

	gpio-ranges-group-names = "gpioa";

};

drivers/pinctrl/Kconfig

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@@ -321,6 +321,10 @@ config PINCTRL_XWAY 
	depends on SOC_TYPE_XWAY

	depends on PINCTRL_LANTIQ



config PINCTRL_TB10X

	bool

	depends on ARC_PLAT_TB10X



endmenu



endif

drivers/pinctrl/Makefile

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@@ -56,6 +56,7 @@ obj-$(CONFIG_PINCTRL_S3C24XX) += pinctrl-s3c24xx.o 
obj-$(CONFIG_PINCTRL_S3C64XX)	+= pinctrl-s3c64xx.o

obj-$(CONFIG_PINCTRL_XWAY)	+= pinctrl-xway.o

obj-$(CONFIG_PINCTRL_LANTIQ)	+= pinctrl-lantiq.o

obj-$(CONFIG_PINCTRL_TB10X)	+= pinctrl-tb10x.o

obj-$(CONFIG_PINCTRL_ST) 	+= pinctrl-st.o

obj-$(CONFIG_PINCTRL_VF610)	+= pinctrl-vf610.o

drivers/pinctrl/pinctrl-tb10x.c

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File added.

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