[PATCH 05/14] pinctrl-snapdragon: Get rid of custom drive-strength values

[Sumit Garg]

Use standard pinconf drive-strength values from Linux DT bindings rather
than ones based on custom u-boot header. These changes are in direction
to make u-boot DTs for Qcom SoCs to be compatible with standard Linux
DT bindings.

Also, add support for pinconf bias-pull-up.

Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
---
 arch/arm/dts/dragonboard410c.dts              |  3 +--
 arch/arm/dts/dragonboard820c.dts              |  3 +--
 arch/arm/dts/qcom-ipq4019.dtsi                |  1 -
 arch/arm/dts/qcs404-evb.dts                   |  1 -
 arch/arm/mach-snapdragon/pinctrl-snapdragon.c |  8 ++++++-
 .../dt-bindings/pinctrl/pinctrl-snapdragon.h  | 22 -------------------
 6 files changed, 9 insertions(+), 29 deletions(-)
 delete mode 100644 include/dt-bindings/pinctrl/pinctrl-snapdragon.h

diff --git a/arch/arm/dts/dragonboard410c.dts b/arch/arm/dts/dragonboard410c.dts
index 59cf45eb17..9230dd3fd9 100644
--- a/arch/arm/dts/dragonboard410c.dts
+++ b/arch/arm/dts/dragonboard410c.dts
@@ -9,7 +9,6 @@
 
 #include "skeleton64.dtsi"
 #include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/pinctrl/pinctrl-snapdragon.h>
 
 / {
 	model = "Qualcomm Technologies, Inc. Dragonboard 410c";
@@ -71,7 +70,7 @@
 			blsp1_uart: uart {
 				function = "blsp1_uart";
 				pins = "GPIO_4", "GPIO_5";
-				drive-strength = <DRIVE_STRENGTH_8MA>;
+				drive-strength = <8>;
 				bias-disable;
 			};
 		};
diff --git a/arch/arm/dts/dragonboard820c.dts b/arch/arm/dts/dragonboard820c.dts
index aaca681d2e..ad201d4874 100644
--- a/arch/arm/dts/dragonboard820c.dts
+++ b/arch/arm/dts/dragonboard820c.dts
@@ -8,7 +8,6 @@
 /dts-v1/;
 
 #include "skeleton64.dtsi"
-#include <dt-bindings/pinctrl/pinctrl-snapdragon.h>
 
 / {
 	model = "Qualcomm Technologies, Inc. DB820c";
@@ -71,7 +70,7 @@
 			blsp8_uart: uart {
 				function = "blsp_uart8";
 				pins = "GPIO_4", "GPIO_5";
-				drive-strength = <DRIVE_STRENGTH_8MA>;
+				drive-strength = <8>;
 				bias-disable;
 			};
 		};
diff --git a/arch/arm/dts/qcom-ipq4019.dtsi b/arch/arm/dts/qcom-ipq4019.dtsi
index 181732d262..6edc69da67 100644
--- a/arch/arm/dts/qcom-ipq4019.dtsi
+++ b/arch/arm/dts/qcom-ipq4019.dtsi
@@ -9,7 +9,6 @@
 
 #include "skeleton.dtsi"
 #include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/pinctrl/pinctrl-snapdragon.h>
 #include <dt-bindings/clock/qcom,ipq4019-gcc.h>
 #include <dt-bindings/reset/qcom,ipq4019-reset.h>
 
diff --git a/arch/arm/dts/qcs404-evb.dts b/arch/arm/dts/qcs404-evb.dts
index c8bcf9f71d..cc70afa4c8 100644
--- a/arch/arm/dts/qcs404-evb.dts
+++ b/arch/arm/dts/qcs404-evb.dts
@@ -9,7 +9,6 @@
 
 #include "skeleton64.dtsi"
 #include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/pinctrl/pinctrl-snapdragon.h>
 #include <dt-bindings/clock/qcom,gcc-qcs404.h>
 
 / {
diff --git a/arch/arm/mach-snapdragon/pinctrl-snapdragon.c b/arch/arm/mach-snapdragon/pinctrl-snapdragon.c
index ab884ab6bf..826dc51486 100644
--- a/arch/arm/mach-snapdragon/pinctrl-snapdragon.c
+++ b/arch/arm/mach-snapdragon/pinctrl-snapdragon.c
@@ -28,8 +28,9 @@ struct msm_pinctrl_priv {
 #define TLMM_GPIO_DISABLE BIT(9)
 
 static const struct pinconf_param msm_conf_params[] = {
-	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 3 },
+	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 2 },
 	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
+	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 3 },
 };
 
 static int msm_get_functions_count(struct udevice *dev)
@@ -89,6 +90,7 @@ static int msm_pinconf_set(struct udevice *dev, unsigned int pin_selector,
 
 	switch (param) {
 	case PIN_CONFIG_DRIVE_STRENGTH:
+		argument = (argument / 2) - 1;
 		clrsetbits_le32(priv->base + GPIO_CONFIG_OFFSET(pin_selector),
 				TLMM_DRV_STRENGTH_MASK, argument << 6);
 		break;
@@ -96,6 +98,10 @@ static int msm_pinconf_set(struct udevice *dev, unsigned int pin_selector,
 		clrbits_le32(priv->base + GPIO_CONFIG_OFFSET(pin_selector),
 			     TLMM_GPIO_PULL_MASK);
 		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		clrsetbits_le32(priv->base + GPIO_CONFIG_OFFSET(pin_selector),
+				TLMM_GPIO_PULL_MASK, argument);
+		break;
 	default:
 		return 0;
 	}
diff --git a/include/dt-bindings/pinctrl/pinctrl-snapdragon.h b/include/dt-bindings/pinctrl/pinctrl-snapdragon.h
deleted file mode 100644
index 615affb6f2..0000000000
--- a/include/dt-bindings/pinctrl/pinctrl-snapdragon.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * This header provides constants for Qualcomm Snapdragon pinctrl bindings.
- *
- * (C) Copyright 2018 Ramon Fried <ramon.fried at gmail.com>
- *
- */
-
-#ifndef _DT_BINDINGS_PINCTRL_SNAPDRAGON_H
-#define _DT_BINDINGS_PINCTRL_SNAPDRAGON_H
-
-/* GPIO Drive Strength */
-#define DRIVE_STRENGTH_2MA        0
-#define DRIVE_STRENGTH_4MA        1
-#define DRIVE_STRENGTH_6MA        2
-#define DRIVE_STRENGTH_8MA        3
-#define DRIVE_STRENGTH_10MA       4
-#define DRIVE_STRENGTH_12MA       5
-#define DRIVE_STRENGTH_14MA       6
-#define DRIVE_STRENGTH_16MA       7
-
-#endif
-- 
2.34.1