[PATCH 0/4] Add Mediatek SoC Pinctrl/GPIO driver for MT8135.

This patch is Mediatek SoC Pinctrl/GPIO driver for MT8135,
it is based on Joe.C' basic device tree support.
See http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/288582.html

This driver include common and MT8135 part, other Mediatek SoCs
will share the common part, and MT8135 part only support MT8135.
MT8135 has GPIO controller, it includes 203 pins.

Hongzhou Yang (3):
ARM: mediatek: Add Pinctrl/GPIO driver for mt8135.
ARM: dts: mt8135: Add pinctrl node for mt8135.
dt-bindings: Add pinctrl bindings for mt65xx/mt81xx.

Joe.C (1):
arm: mediatek: Add config option for mediatek SoCs.

.../devicetree/bindings/pinctrl/pinctrl-mt65xx.txt |   92 +
arch/arm/boot/dts/mt8135-pinfunc.h                 | 1304 +++++++++++
arch/arm/boot/dts/mt8135.dtsi                      |   11 +
arch/arm/mach-mediatek/Kconfig                     |   23 +-
drivers/pinctrl/Kconfig                            |    1 +
drivers/pinctrl/Makefile                           |    1 +
drivers/pinctrl/mediatek/Kconfig                   |   12 +
drivers/pinctrl/mediatek/Makefile                  |    5 +
drivers/pinctrl/mediatek/pinctrl-mt8135.c          |   82 +
drivers/pinctrl/mediatek/pinctrl-mtk-common.c      |  836 +++++++
drivers/pinctrl/mediatek/pinctrl-mtk-common.h      |   95 +
drivers/pinctrl/mediatek/pinctrl-mtk-mt8135.h      | 2460 ++++++++++++++++++++
include/dt-bindings/pinctrl/mt65xx.h               |   27 +
13 files changed, 4946 insertions(+), 3 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-mt65xx.txt
create mode 100644 arch/arm/boot/dts/mt8135-pinfunc.h
create mode 100644 drivers/pinctrl/mediatek/Kconfig
create mode 100644 drivers/pinctrl/mediatek/Makefile
create mode 100644 drivers/pinctrl/mediatek/pinctrl-mt8135.c
create mode 100644 drivers/pinctrl/mediatek/pinctrl-mtk-common.c
create mode 100644 drivers/pinctrl/mediatek/pinctrl-mtk-common.h
create mode 100644 drivers/pinctrl/mediatek/pinctrl-mtk-mt8135.h
create mode 100644 include/dt-bindings/pinctrl/mt65xx.h

--
1.8.1.1.dirty

From: "Joe.C" <redacted>

Add config options for ARCH_MT6589, ARCH_MT8127, ARCH_MT8135. This
allow drivers to isolate support base on these options.

Signed-off-by: Joe.C <redacted>
---
 arch/arm/mach-mediatek/Kconfig | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index 2c043a2..25fe6cf 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig

@@ -1,6 +1,22 @@
-config ARCH_MEDIATEK
-	bool "Mediatek MT6589 SoC" if ARCH_MULTI_V7
+menuconfig ARCH_MEDIATEK
+	bool "Mediatek MT65xx & MT81xx SoC" if ARCH_MULTI_V7
 	select ARM_GIC
 	select MTK_TIMER
 	help
-	  Support for Mediatek Cortex-A7 Quad-Core-SoC MT6589.
+	  Support for Mediatek MT65xx & MT81xx SoCs
+
+if ARCH_MEDIATEK
+
+config MACH_MT6589
+	bool "MediaTek MT6589 SoCs support"
+	default ARCH_MEDIATEK
+
+config MACH_MT8127
+	bool "MediaTek MT8127 SoCs support"
+	default ARCH_MEDIATEK
+
+config MACH_MT8135
+	bool "MediaTek MT8135 SoCs support"
+	default ARCH_MEDIATEK
+
+endif

-- 
1.8.1.1.dirty

From: Hongzhou Yang <redacted>

Add pinctrl node to mt8135.dtsi.

Signed-off-by: Hongzhou Yang <redacted>
---
 arch/arm/boot/dts/mt8135.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/boot/dts/mt8135.dtsi b/arch/arm/boot/dts/mt8135.dtsi
index 90a56ad..1bfd3d0 100644
--- a/arch/arm/boot/dts/mt8135.dtsi
+++ b/arch/arm/boot/dts/mt8135.dtsi

@@ -15,6 +15,8 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include "skeleton64.dtsi"
+#include "mt8135-pinfunc.h"
+#include <dt-bindings/pinctrl/mt65xx.h>
 
 / {
 	compatible = "mediatek,mt8135";

@@ -111,5 +113,14 @@
 			      <0 0x10214000 0 0x2000>,
 			      <0 0x10216000 0 0x2000>;
 		};
+
+		pio: pinctrl at 10005000 {
+			compatible = "mediatek,mt8135-pinctrl";
+			reg = <0 0x10005000 0 0x1000>,
+			      <0 0x1020C000 0 0x1000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
 	};
 };

-- 
1.8.1.1.dirty

From: Hongzhou Yang <redacted>

Add devicetree bindings for Mediatek SoC pinctrl driver.

Signed-off-by: Hongzhou Yang <redacted>
---
 .../devicetree/bindings/pinctrl/pinctrl-mt65xx.txt | 92 ++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-mt65xx.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt65xx.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt65xx.txt
new file mode 100644
index 0000000..e2deff6
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt65xx.txt

@@ -0,0 +1,92 @@
+* Mediatek MT65XX Pin Controller
+
+The Mediatek's Pin controller is used to control GPIO pins.
+
+Required properties:
+- compatible: value should be either of the following.
+    (a) "mediatek,mt8135-pinctrl", compatible with mt8135 pinctrl.
+- reg: Should contain the register physical address and length for the
+  pin controller.
+- gpio-controller : Marks the device node as a gpio controller.
+- #gpio-cells: number of cells in GPIO specifier. Since the generic GPIO
+  binding is used, the amount of cells must be specified as 2. See the below
+  mentioned gpio binding representation for description of particular cells.
+
+	Eg: <&pio 6 0>
+	<[phandle of the gpio controller node]
+	[pin number within the gpio controller]
+	[flags]>
+
+	Values for gpio specifier:
+	- Pin number: is a value between 0 to 202.
+	- Flags:  bit field of flags, as defined in <dt-bindings/gpio/gpio.h>.
+            Only the following flags are supported:
+            0 - GPIO_ACTIVE_HIGH
+            1 - GPIO_ACTIVE_LOW
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices.
+
+A pinctrl node should contain at least one subnodes representing the
+pinctrl groups available on the machine. Each subnode will list the
+pins it needs, and how they should be configured, with regard to muxer
+configuration and pullups. If one of these options is
+not set, its actual value will be unspecified.
+
+Required subnode-properties:
+
+- mediatek,pinfunc: List of gpio number and function to mux.
+
+The mediatek,pinfunc can use defines directly,
+which are already defind in boot/dts/mt8135-pinfunc.h.
+
+Optional subnode-properties:
+- mediatek,pull: Integer, defines in dt-bindings/pinctrl/mt65xx.h.
+    MT_PIN_PULL_DISABLE: No resistor
+    MT_PIN_CONF_PULL_UP: Pull-up resistor
+    MT_PIN_CONF_PULL_DOWN: Pull-down resistor
+
+The mediatek,pull can be either a single value or an array.
+If it is a single value, that means all pins use use this value for same.
+If it is an array, the means one value per pin.
+
+Examples:
+
+pinctrl at 01c20800 {
+	compatible = "mediatek,mt8135-pinctrl";
+	reg = <0x01c20800 0x400>;
+	gpio-controller;
+	#gpio-cells = <2>;
+
+	i2c0_pins_a: i2c0 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_100_SDA0__FUNC_SDA0 MT8135_PIN_101_SCL0__FUNC_SCL0>;
+		mediatek,pull = <MT_PIN_PULL_DISABLE>;
+	};
+
+	i2c1_pins_a: i2c1 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_195_SDA1__FUNC_SDA1 MT8135_PIN_196_SCL1__FUNC_SCL1>;
+		mediatek,pull = <MT_PIN_PULL_DISABLE>;
+	};
+
+	i2c2_pins_a: i2c2 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_193_SDA2__FUNC_SDA2 MT8135_PIN_194_SCL2__FUNC_SCL2>;
+		mediatek,pull = <MT_PIN_PULL_DISABLE>;
+	};
+
+	i2c3_pins_a: i2c3 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_35_SCL3__FUNC_SCL3 MT8135_PIN_36_SDA3__FUNC_SDA3>;
+		mediatek,pull = <MT_PIN_PULL_DISABLE>;
+	};
+
+	uart2_pins_a: uart2 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_53_URXD2__FUNC_URXD2 MT8135_PIN_54_UTXD2__FUNC_UTXD2>;
+		mediatek,pull = <MT_PIN_PULL_DISABLE>;
+	};
+
+	uart3_pins_a: uart3 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_191_URXD3__FUNC_URXD3 MT8135_PIN_192_UTXD3__FUNC_UTXD3>;
+		mediatek,pull = <MT_PIN_PULL_DISABLE>;
+	};
+	...
+
+};

-- 
1.8.1.1.dirty

Am Freitag, 19. September 2014, 19:48:26 schrieb 
srv_hongzhou.yang at mediatek.com:

Please use the generic pinconfig for such options instead of defining your own.

For examples on how to do this in a devicetree-context using 
pinconf_generic_parse_dt_config() you could look at

drivers/pinctrl/nomadik/pinctrl-abx500.c
drivers/pinctrl/pinctrl-tz1090.c
drivers/pinctrl/sh-pfc/pinctrl.c


Heiko

+
+The mediatek,pull can be either a single value or an array.
+If it is a single value, that means all pins use use this value for same.
+If it is an array, the means one value per pin.
+
+Examples:
+
+pinctrl at 01c20800 {
+	compatible = "mediatek,mt8135-pinctrl";
+	reg = <0x01c20800 0x400>;
+	gpio-controller;
+	#gpio-cells = <2>;
+
+	i2c0_pins_a: i2c0 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_100_SDA0__FUNC_SDA0
MT8135_PIN_101_SCL0__FUNC_SCL0>; +		mediatek,pull = 

<MT_PIN_PULL_DISABLE>;

+	};
+
+	i2c1_pins_a: i2c1 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_195_SDA1__FUNC_SDA1
MT8135_PIN_196_SCL1__FUNC_SCL1>; +		mediatek,pull = 

<MT_PIN_PULL_DISABLE>;

+	};
+
+	i2c2_pins_a: i2c2 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_193_SDA2__FUNC_SDA2
MT8135_PIN_194_SCL2__FUNC_SCL2>; +		mediatek,pull = 

<MT_PIN_PULL_DISABLE>;

+	};
+
+	i2c3_pins_a: i2c3 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_35_SCL3__FUNC_SCL3
MT8135_PIN_36_SDA3__FUNC_SDA3>; +		mediatek,pull = 

<MT_PIN_PULL_DISABLE>;

+	};
+
+	uart2_pins_a: uart2 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_53_URXD2__FUNC_URXD2
MT8135_PIN_54_UTXD2__FUNC_UTXD2>; +		mediatek,pull = 

<MT_PIN_PULL_DISABLE>;

+	};
+
+	uart3_pins_a: uart3 at 0 {
+		mediatek,pinfunc = <MT8135_PIN_191_URXD3__FUNC_URXD3
MT8135_PIN_192_UTXD3__FUNC_UTXD3>; +		mediatek,pull =
<MT_PIN_PULL_DISABLE>;
+	};
+	...
+
+};