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authorHongzhou Yang <hongzhou.yang@mediatek.com>2015-01-21 13:28:15 +0800
committerLinus Walleij <linus.walleij@linaro.org>2015-03-18 02:02:14 +0100
commita6df410d420aa4ff316797d352f69e7ebae5ff98 (patch)
tree0dfeffd944810059bf7efa91b32e587c96446964 /drivers/pinctrl/mediatek/pinctrl-mtk-common.h
parentddac96118f3d2c28813ba98cda79c1e29a902e02 (diff)
pinctrl: mediatek: Add Pinctrl/GPIO driver for mt8135.
The mediatek SoCs have GPIO controller that handle both the muxing and GPIOs. The GPIO controller have pinmux, pull enable, pull select, direction and output high/low control. This driver include common driver and mt8135 part. The common driver include the pinctrl driver and GPIO driver. The mt8135 part contain its special device data. Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common.h')
-rw-r--r--drivers/pinctrl/mediatek/pinctrl-mtk-common.h185
1 files changed, 185 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
new file mode 100644
index 000000000000..95a9d57ca1fd
--- /dev/null
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2014 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.
+ */
+
+#ifndef __PINCTRL_MTK_COMMON_H
+#define __PINCTRL_MTK_COMMON_H
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+
+#define NO_EINT_SUPPORT 255
+
+struct mtk_desc_function {
+ const char *name;
+ unsigned char muxval;
+};
+
+struct mtk_desc_eint {
+ unsigned char eintmux;
+ unsigned char eintnum;
+};
+
+struct mtk_desc_pin {
+ struct pinctrl_pin_desc pin;
+ const char *chip;
+ const struct mtk_desc_eint eint;
+ const struct mtk_desc_function *functions;
+};
+
+#define MTK_PIN(_pin, _pad, _chip, _eint, ...) \
+ { \
+ .pin = _pin, \
+ .chip = _chip, \
+ .eint = _eint, \
+ .functions = (struct mtk_desc_function[]){ \
+ __VA_ARGS__, { } }, \
+ }
+
+#define MTK_EINT_FUNCTION(_eintmux, _eintnum) \
+ { \
+ .eintmux = _eintmux, \
+ .eintnum = _eintnum, \
+ }
+
+#define MTK_FUNCTION(_val, _name) \
+ { \
+ .muxval = _val, \
+ .name = _name, \
+ }
+
+#define SET_ADDR(x, y) (x + (y->devdata->port_align))
+#define CLR_ADDR(x, y) (x + (y->devdata->port_align << 1))
+
+struct mtk_pinctrl_group {
+ const char *name;
+ unsigned long config;
+ unsigned pin;
+};
+
+/**
+ * struct mtk_drv_group_desc - Provide driving group data.
+ * @max_drv: The maximum current of this group.
+ * @min_drv: The minimum current of this group.
+ * @low_bit: The lowest bit of this group.
+ * @high_bit: The highest bit of this group.
+ * @step: The step current of this group.
+ */
+struct mtk_drv_group_desc {
+ unsigned char min_drv;
+ unsigned char max_drv;
+ unsigned char low_bit;
+ unsigned char high_bit;
+ unsigned char step;
+};
+
+#define MTK_DRV_GRP(_min, _max, _low, _high, _step) \
+ { \
+ .min_drv = _min, \
+ .max_drv = _max, \
+ .low_bit = _low, \
+ .high_bit = _high, \
+ .step = _step, \
+ }
+
+/**
+ * struct mtk_pin_drv_grp - Provide each pin driving info.
+ * @pin: The pin number.
+ * @offset: The offset of driving register for this pin.
+ * @bit: The bit of driving register for this pin.
+ * @grp: The group for this pin belongs to.
+ */
+struct mtk_pin_drv_grp {
+ unsigned int pin;
+ unsigned int offset;
+ unsigned char bit;
+ unsigned char grp;
+};
+
+#define MTK_PIN_DRV_GRP(_pin, _offset, _bit, _grp) \
+ { \
+ .pin = _pin, \
+ .offset = _offset, \
+ .bit = _bit, \
+ .grp = _grp, \
+ }
+
+/**
+ * struct mtk_pinctrl_devdata - Provide HW GPIO related data.
+ * @pins: An array describing all pins the pin controller affects.
+ * @npins: The number of entries in @pins.
+ *
+ * @grp_desc: The driving group info.
+ * @pin_drv_grp: The driving group for all pins.
+ * @spec_pull_set: Each SoC may have special pins for pull up/down setting,
+ * these pins' pull setting are very different, they have separate pull
+ * 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.
+ *
+ * @dir_offset: The direction register offset.
+ * @pullen_offset: The pull-up/pull-down enable register offset.
+ * @pinmux_offset: The pinmux register offset.
+ *
+ * @type1_start: Some chips have two base addresses for pull select register,
+ * that means some pins use the first address and others use the second. This
+ * member record the start of pin number to use the second address.
+ * @type1_end: The end of pin number to use the second address.
+ *
+ * @port_shf: The shift between two registers.
+ * @port_mask: The mask of register.
+ * @port_align: Provide clear register and set register step.
+ */
+struct mtk_pinctrl_devdata {
+ const struct mtk_desc_pin *pins;
+ unsigned int npins;
+ const struct mtk_drv_group_desc *grp_desc;
+ unsigned int n_grp_cls;
+ const struct mtk_pin_drv_grp *pin_drv_grp;
+ unsigned int n_pin_drv_grps;
+ int (*spec_pull_set)(struct regmap *reg, unsigned int pin,
+ unsigned char align, bool isup, unsigned int arg);
+ unsigned int dir_offset;
+ unsigned int ies_offset;
+ unsigned int smt_offset;
+ unsigned int pullen_offset;
+ unsigned int pullsel_offset;
+ unsigned int drv_offset;
+ unsigned int invser_offset;
+ unsigned int dout_offset;
+ unsigned int din_offset;
+ unsigned int pinmux_offset;
+ unsigned short type1_start;
+ unsigned short type1_end;
+ unsigned char port_shf;
+ unsigned char port_mask;
+ unsigned char port_align;
+};
+
+struct mtk_pinctrl {
+ struct regmap *regmap1;
+ struct regmap *regmap2;
+ struct device *dev;
+ struct gpio_chip *chip;
+ struct mtk_pinctrl_group *groups;
+ unsigned ngroups;
+ const char **grp_names;
+ struct pinctrl_dev *pctl_dev;
+ const struct mtk_pinctrl_devdata *devdata;
+};
+
+int mtk_pctrl_init(struct platform_device *pdev,
+ const struct mtk_pinctrl_devdata *data);
+
+#endif /* __PINCTRL_MTK_COMMON_H */