[PATCH v2 0/3] ARM: Keystone: Add pinmuxing support

[PATCH v2 0/3] ARM: Keystone: Add pinmuxing support

[Franklin S Cooper Jr]

Unlike most Keystone 2 devices, K2G supports pinmuxing of its pins. This
patch series enables pinmuxing for Keystone 2 devices.

Version 2 changes:
Rebased on top of linux-next which includes Keerthy patches.

Lokesh Vutla (2):
  ARM: dts: keystone: Header file for pinctrl constants
  ARM: dts: k2g-evm: Add pinmuxing for UART0

Vitaly Andrianov (1):
  ARM: dts: k2g: Add pinctrl support

 arch/arm/boot/dts/keystone-k2g-evm.dts | 11 ++++++++++
 arch/arm/boot/dts/keystone-k2g.dtsi    |  8 +++++++
 include/dt-bindings/pinctrl/keystone.h | 39 ++++++++++++++++++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 include/dt-bindings/pinctrl/keystone.h

-- 
2.7.0

[PATCH v2 1/3] ARM: dts: k2g: Add pinctrl support

[Franklin S Cooper Jr]

From: Vitaly Andrianov <vitalya@ti.com>

Add pinctrl support.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
 arch/arm/boot/dts/keystone-k2g.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/keystone-k2g.dtsi b/arch/arm/boot/dts/keystone-k2g.dtsi
index 7ff2796..b99e879 100644
--- a/arch/arm/boot/dts/keystone-k2g.dtsi
+++ b/arch/arm/boot/dts/keystone-k2g.dtsi
@@ -75,6 +75,13 @@
 		ranges = <0x0 0x0 0x0 0xc0000000>;
 		dma-ranges = <0x80000000 0x8 0x00000000 0x80000000>;
 
+		k2g_pinctrl: pinmux@02621000 {
+			compatible = "pinctrl-single";
+			reg = <0x02621000 0x410>;
+			pinctrl-single,register-width = <32>;
+			pinctrl-single,function-mask = <0x001b0007>;
+		};
+
 		uart0: serial@02530c00 {
 			compatible = "ns16550a";
 			current-speed = <115200>;
-- 
2.7.0

[PATCH v2 2/3] ARM: dts: keystone: Header file for pinctrl constants

[Franklin S Cooper Jr]

From: Lokesh Vutla <lokeshvutla@ti.com>

The pinctrl IP used in some of the Keystone 2 devices differ vs other
TI SoCs. Therefore, create a Keystone specific pinctrl header.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
 arch/arm/boot/dts/keystone-k2g.dtsi    |  1 +
 include/dt-bindings/pinctrl/keystone.h | 39 ++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 include/dt-bindings/pinctrl/keystone.h

diff --git a/arch/arm/boot/dts/keystone-k2g.dtsi b/arch/arm/boot/dts/keystone-k2g.dtsi
index b99e879..3372615 100644
--- a/arch/arm/boot/dts/keystone-k2g.dtsi
+++ b/arch/arm/boot/dts/keystone-k2g.dtsi
@@ -14,6 +14,7 @@
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/pinctrl/keystone.h>
 #include "skeleton.dtsi"
 
 / {
diff --git a/include/dt-bindings/pinctrl/keystone.h b/include/dt-bindings/pinctrl/keystone.h
new file mode 100644
index 0000000..7f97d77
--- /dev/null
+++ b/include/dt-bindings/pinctrl/keystone.h
@@ -0,0 +1,39 @@
+/*
+ * This header provides constants for Keystone pinctrl bindings.
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _DT_BINDINGS_PINCTRL_KEYSTONE_H
+#define _DT_BINDINGS_PINCTRL_KEYSTONE_H
+
+#define MUX_MODE0	0
+#define MUX_MODE1	1
+#define MUX_MODE2	2
+#define MUX_MODE3	3
+#define MUX_MODE4	4
+#define MUX_MODE5	5
+
+#define BUFFER_CLASS_B	(0 << 19)
+#define BUFFER_CLASS_C	(1 << 19)
+#define BUFFER_CLASS_D	(2 << 19)
+#define BUFFER_CLASS_E	(3 << 19)
+
+#define PULL_DISABLE	(1 << 16)
+#define PIN_PULLUP	(1 << 17)
+#define PIN_PULLDOWN	(0 << 17)
+
+#define KEYSTONE_IOPAD_OFFSET(pa, offset) (((pa) & 0xffff) - (offset))
+
+#define K2G_CORE_IOPAD(pa) KEYSTONE_IOPAD_OFFSET((pa), 0x1000)
+
+#endif
-- 
2.7.0

[PATCH v2 3/3] ARM: dts: k2g-evm: Add pinmuxing for UART0

[Franklin S Cooper Jr]

From: Lokesh Vutla <lokeshvutla@ti.com>

Avoid depending on the bootloader or the ROM for configuring the pinmux by
explicitly setting the pinmux here.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
 arch/arm/boot/dts/keystone-k2g-evm.dts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/boot/dts/keystone-k2g-evm.dts b/arch/arm/boot/dts/keystone-k2g-evm.dts
index 5bfd9e7..692fcbb 100644
--- a/arch/arm/boot/dts/keystone-k2g-evm.dts
+++ b/arch/arm/boot/dts/keystone-k2g-evm.dts
@@ -27,6 +27,17 @@
 
 };
 
+&k2g_pinctrl {
+	uart0_pins: pinmux_uart0_pins {
+		pinctrl-single,pins = <
+			K2G_CORE_IOPAD(0x11cc) (BUFFER_CLASS_B | PULL_DISABLE | MUX_MODE0)	/* uart0_rxd.uart0_rxd */
+			K2G_CORE_IOPAD(0x11d0) (BUFFER_CLASS_B | PIN_PULLDOWN | MUX_MODE0)	/* uart0_txd.uart0_txd */
+		>;
+	};
+};
+
 &uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
 	status = "okay";
 };
-- 
2.7.0

Re: [PATCH v2 0/3] ARM: Keystone: Add pinmuxing support

[Santosh Shilimkar]

On 6/9/2016 8:26 AM, Franklin S Cooper Jr wrote:
> Unlike most Keystone 2 devices, K2G supports pinmuxing of its pins. This
> patch series enables pinmuxing for Keystone 2 devices.
>
> Version 2 changes:
> Rebased on top of linux-next which includes Keerthy patches.
>
Series applied. Should start showing up in linux-next soon.

Regards,
Santosh