pinctrl: mediatek: Add Pinctrl/GPIO driver for mt6397.

Add mt6397 support using mediatek common pinctrl driver.

mt6397 is a PMIC, and pinctrl/GPIO is part of 6397 chip.
Pinctrl/GPIO driver should obtain regmap from PMIC,
so adding this support to common code.

Also, mt6397 is no need to support interrupt controller,
so changing common code to skip it.
Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/Kconfig

@@ -23,4 +23,10 @@ config PINCTRL_MT8173
 	default ARM64 && ARCH_MEDIATEK
 	select PINCTRL_MTK_COMMON
 
+# For PMIC
+config PINCTRL_MT6397
+	bool "Mediatek MT6397 pin control" if COMPILE_TEST && !MFD_MT6397
+	default MFD_MT6397
+	select PINCTRL_MTK_COMMON
+
 endif

drivers/pinctrl/mediatek/Makefile

@@ -4,3 +4,4 @@ obj-$(CONFIG_PINCTRL_MTK_COMMON)	+= pinctrl-mtk-common.o
 # SoC Drivers
 obj-$(CONFIG_PINCTRL_MT8135)		+= pinctrl-mt8135.o
 obj-$(CONFIG_PINCTRL_MT8173)		+= pinctrl-mt8173.o
+obj-$(CONFIG_PINCTRL_MT6397)		+= pinctrl-mt6397.o

drivers/pinctrl/mediatek/pinctrl-mt6397.c

+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Hongzhou.Yang <hongzhou.yang@mediatek.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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/mfd/mt6397/core.h>
+
+#include "pinctrl-mtk-common.h"
+#include "pinctrl-mtk-mt6397.h"
+
+#define MT6397_PIN_REG_BASE  0xc000
+
+static const struct mtk_pinctrl_devdata mt6397_pinctrl_data = {
+	.pins = mtk_pins_mt6397,
+	.npins = ARRAY_SIZE(mtk_pins_mt6397),
+	.dir_offset = (MT6397_PIN_REG_BASE + 0x000),
+	.ies_offset = MTK_PINCTRL_NOT_SUPPORT,
+	.smt_offset = MTK_PINCTRL_NOT_SUPPORT,
+	.pullen_offset = (MT6397_PIN_REG_BASE + 0x020),
+	.pullsel_offset = (MT6397_PIN_REG_BASE + 0x040),
+	.dout_offset = (MT6397_PIN_REG_BASE + 0x080),
+	.din_offset = (MT6397_PIN_REG_BASE + 0x0a0),
+	.pinmux_offset = (MT6397_PIN_REG_BASE + 0x0c0),
+	.type1_start = 41,
+	.type1_end = 41,
+	.port_shf = 3,
+	.port_mask = 0x3,
+	.port_align = 2,
+};
+
+static int mt6397_pinctrl_probe(struct platform_device *pdev)
+{
+	struct mt6397_chip *mt6397;
+
+	mt6397 = dev_get_drvdata(pdev->dev.parent);
+	return mtk_pctrl_init(pdev, &mt6397_pinctrl_data, mt6397->regmap);
+}
+
+static const struct of_device_id mt6397_pctrl_match[] = {
+	{ .compatible = "mediatek,mt6397-pinctrl", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mt6397_pctrl_match);
+
+static struct platform_driver mtk_pinctrl_driver = {
+	.probe = mt6397_pinctrl_probe,
+	.driver = {
+		.name = "mediatek-mt6397-pinctrl",
+		.owner = THIS_MODULE,
+		.of_match_table = mt6397_pctrl_match,
+	},
+};
+
+static int __init mtk_pinctrl_init(void)
+{
+	return platform_driver_register(&mtk_pinctrl_driver);
+}
+
+module_init(mtk_pinctrl_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek MT6397 Pinctrl Driver");
+MODULE_AUTHOR("Hongzhou Yang <hongzhou.yang@mediatek.com>");

drivers/pinctrl/mediatek/pinctrl-mt8135.c

@@ -342,7 +342,7 @@ static const struct mtk_pinctrl_devdata mt8135_pinctrl_data = {
 
 static int mt8135_pinctrl_probe(struct platform_device *pdev)
 {
-	return mtk_pctrl_init(pdev, &mt8135_pinctrl_data);
+	return mtk_pctrl_init(pdev, &mt8135_pinctrl_data, NULL);
 }
 
 static const struct of_device_id mt8135_pctrl_match[] = {

drivers/pinctrl/mediatek/pinctrl-mt8173.c

@@ -361,7 +361,7 @@ static const struct mtk_pinctrl_devdata mt8173_pinctrl_data = {
 
 static int mt8173_pinctrl_probe(struct platform_device *pdev)
 {
-	return mtk_pctrl_init(pdev, &mt8173_pinctrl_data);
+	return mtk_pctrl_init(pdev, &mt8173_pinctrl_data, NULL);
 }
 
 static const struct of_device_id mt8173_pctrl_match[] = {

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

@@ -1207,7 +1207,8 @@ static struct pinctrl_desc mtk_pctrl_desc = {
 };
 
 int mtk_pctrl_init(struct platform_device *pdev,
-		const struct mtk_pinctrl_devdata *data)
+		const struct mtk_pinctrl_devdata *data,
+		struct regmap *regmap)
 {
 	struct pinctrl_pin_desc *pins;
 	struct mtk_pinctrl *pctl;
@@ -1233,6 +1234,11 @@ int mtk_pctrl_init(struct platform_device *pdev,
 		pctl->regmap1 = syscon_node_to_regmap(node);
 		if (IS_ERR(pctl->regmap1))
 			return PTR_ERR(pctl->regmap1);
+	} else if (regmap) {
+		pctl->regmap1  = regmap;
+	} else {
+		dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n");
+		return -EINVAL;
 	}
 
 	/* Only 8135 has two base addr, other SoCs have only one. */
@@ -1278,7 +1284,7 @@ int mtk_pctrl_init(struct platform_device *pdev,
 	pctl->chip->ngpio = pctl->devdata->npins;
 	pctl->chip->label = dev_name(&pdev->dev);
 	pctl->chip->dev = &pdev->dev;
-	pctl->chip->base = 0;
+	pctl->chip->base = -1;
 
 	ret = gpiochip_add(pctl->chip);
 	if (ret) {
@@ -1294,6 +1300,9 @@ int mtk_pctrl_init(struct platform_device *pdev,
 		goto chip_error;
 	}
 
+	if (of_find_property(np, "interrupt-controller", NULL))
+		return 0;
+
 	/* Get EINT register base from dts. */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {

drivers/pinctrl/mediatek/pinctrl-mtk-common.h

@@ -269,7 +269,8 @@ struct mtk_pinctrl {
 };
 
 int mtk_pctrl_init(struct platform_device *pdev,
-		const struct mtk_pinctrl_devdata *data);
+		const struct mtk_pinctrl_devdata *data,
+		struct regmap *regmap);
 
 int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap,
 		const struct mtk_pin_spec_pupd_set_samereg *pupd_infos,