arm64: mediatek: Add Pinctrl/GPIO/EINT driver for mt8173.

Add mt8173 support using mediatek common pinctrl driver.
MT8173 have a different ies_smt setting register than mt8135,
so adding this support to common code.
Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/Kconfig

@@ -11,4 +11,8 @@ config PINCTRL_MT8135
 	def_bool MACH_MT8135
 	select PINCTRL_MTK_COMMON
 
+config PINCTRL_MT8173
+	def_bool MACH_MT8173
+	select PINCTRL_MTK_COMMON
+
 endif

drivers/pinctrl/mediatek/Makefile

@@ -3,3 +3,4 @@ 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

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

@@ -32,6 +32,7 @@
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
 #include <linux/delay.h>
+#include <linux/interrupt.h>
 #include <dt-bindings/pinctrl/mt65xx.h>
 
 #include "../core.h"
@@ -111,6 +112,19 @@ static void mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
 {
 	unsigned int reg_addr, offset;
 	unsigned int bit;
+	int ret;
+
+	/*
+	 * Due to some pins are irregular, their input enable and smt
+	 * control register are discontinuous, but they are mapping together.
+	 * So we need this special handle.
+	 */
+	if (pctl->devdata->spec_ies_smt_set) {
+		ret = pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin),
+			pin, pctl->devdata->port_align, value);
+		if (!ret)
+			return;
+	}
 
 	bit = BIT(pin & 0xf);
 

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

@@ -154,6 +154,11 @@ struct mtk_eint_offsets {
  *  up/down bit, R0 and R1 resistor bit, so they need special pull setting.
  *  If special setting is success, this should return 0, otherwise it should
  *  return non-zero value.
+ * @spec_ies_smt_set: Some pins are irregular, their input enable and smt
+ * control register are discontinuous, but they are mapping together. That
+ * means when user set smt, input enable is set at the same time. So they
+ * also need special control. If special control is success, this should
+ * return 0, otherwise return non-zero value.
  *
  * @dir_offset: The direction register offset.
  * @pullen_offset: The pull-up/pull-down enable register offset.
@@ -177,6 +182,8 @@ struct mtk_pinctrl_devdata {
 	unsigned int	n_pin_drv_grps;
 	int (*spec_pull_set)(struct regmap *reg, unsigned int pin,
 			unsigned char align, bool isup, unsigned int arg);
+	int (*spec_ies_smt_set)(struct regmap *reg, unsigned int pin,
+			unsigned char align, int value);
 	unsigned int dir_offset;
 	unsigned int ies_offset;
 	unsigned int smt_offset;