pinctrl: sprd: Add Spreadtrum pin control driver

This patch adds the pin control driver for Spreadtrum SC9860 platform.

Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/Kconfig

@@ -350,6 +350,7 @@ source "drivers/pinctrl/qcom/Kconfig"
 source "drivers/pinctrl/samsung/Kconfig"
 source "drivers/pinctrl/sh-pfc/Kconfig"
 source "drivers/pinctrl/spear/Kconfig"
+source "drivers/pinctrl/sprd/Kconfig"
 source "drivers/pinctrl/stm32/Kconfig"
 source "drivers/pinctrl/sunxi/Kconfig"
 source "drivers/pinctrl/tegra/Kconfig"

drivers/pinctrl/Makefile

@@ -56,6 +56,7 @@ obj-$(CONFIG_ARCH_QCOM)		+= qcom/
 obj-$(CONFIG_PINCTRL_SAMSUNG)	+= samsung/
 obj-$(CONFIG_PINCTRL_SH_PFC)	+= sh-pfc/
 obj-$(CONFIG_PINCTRL_SPEAR)	+= spear/
+obj-y				+= sprd/
 obj-$(CONFIG_PINCTRL_STM32)	+= stm32/
 obj-$(CONFIG_PINCTRL_SUNXI)	+= sunxi/
 obj-y				+= ti/

drivers/pinctrl/sprd/Kconfig

@@ -0,0 +1,17 @@
+#
+# Spreadtrum pin control drivers
+#
+
+config PINCTRL_SPRD
+	bool "Spreadtrum pinctrl driver"
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select GENERIC_PINMUX_FUNCTIONS
+	help
+	  Say Y here to enable Spreadtrum pinctrl driver
+
+config PINCTRL_SPRD_SC9860
+	bool "Spreadtrum SC9860 pinctrl driver"
+	help
+	  Say Y here to enable Spreadtrum SC9860 pinctrl driver

drivers/pinctrl/sprd/Makefile

@@ -0,0 +1,2 @@
+obj-$(CONFIG_PINCTRL_SPRD)		+= pinctrl-sprd.o
+obj-$(CONFIG_PINCTRL_SPRD_SC9860)	+= pinctrl-sprd-sc9860.o

drivers/pinctrl/sprd/pinctrl-sprd.h

@@ -0,0 +1,67 @@
+/*
+ * Driver header file for pin controller driver
+ * Copyright (C) 2017 Spreadtrum  - http://www.spreadtrum.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 in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef __PINCTRL_SPRD_H__
+#define __PINCTRL_SPRD_H__
+
+struct platform_device;
+
+#define NUM_OFFSET	(20)
+#define TYPE_OFFSET	(16)
+#define BIT_OFFSET	(8)
+#define WIDTH_OFFSET	(4)
+
+#define SPRD_PIN_INFO(num, type, offset, width, reg)	\
+		(((num) & 0xFFF) << NUM_OFFSET |	\
+		 ((type) & 0xF) << TYPE_OFFSET |	\
+		 ((offset) & 0xFF) << BIT_OFFSET |	\
+		 ((width) & 0xF) << WIDTH_OFFSET |	\
+		 ((reg) & 0xF))
+
+#define SPRD_PINCTRL_PIN(pin)	SPRD_PINCTRL_PIN_DATA(pin, #pin)
+
+#define SPRD_PINCTRL_PIN_DATA(a, b)				\
+	{							\
+		.name = b,					\
+		.num = (((a) >> NUM_OFFSET) & 0xfff),		\
+		.type = (((a) >> TYPE_OFFSET) & 0xf),		\
+		.bit_offset = (((a) >> BIT_OFFSET) & 0xff),	\
+		.bit_width = ((a) >> WIDTH_OFFSET & 0xf),	\
+		.reg = ((a) & 0xf)				\
+	}
+
+enum pin_type {
+	GLOBAL_CTRL_PIN,
+	COMMON_PIN,
+	MISC_PIN,
+};
+
+struct sprd_pins_info {
+	const char *name;
+	unsigned int num;
+	enum pin_type type;
+
+	/* for global control pins configuration */
+	unsigned long bit_offset;
+	unsigned long bit_width;
+	unsigned int reg;
+};
+
+int sprd_pinctrl_core_probe(struct platform_device *pdev,
+			    struct sprd_pins_info *sprd_soc_pin_info,
+			    int pins_cnt);
+int sprd_pinctrl_remove(struct platform_device *pdev);
+void sprd_pinctrl_shutdown(struct platform_device *pdev);
+
+#endif /* __PINCTRL_SPRD_H__ */