80 lines
2 KiB
C
80 lines
2 KiB
C
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/*
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* Pinctrl driver for the Wondermedia SoC's
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*
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* Copyright (c) 2013 Tony Prisk <linux@prisktech.co.nz>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/gpio.h>
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/* VT8500 has no enable register in the extgpio bank. */
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#define NO_REG 0xFFFF
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#define WMT_PINCTRL_BANK(__en, __dir, __dout, __din, __pen, __pcfg) \
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{ \
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.reg_en = __en, \
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.reg_dir = __dir, \
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.reg_data_out = __dout, \
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.reg_data_in = __din, \
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.reg_pull_en = __pen, \
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.reg_pull_cfg = __pcfg, \
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}
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/* Encode/decode the bank/bit pairs into a pin value */
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#define WMT_PIN(__bank, __offset) ((__bank << 5) | __offset)
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#define WMT_BANK_FROM_PIN(__pin) (__pin >> 5)
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#define WMT_BIT_FROM_PIN(__pin) (__pin & 0x1f)
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#define WMT_GROUP(__name, __data) \
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{ \
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.name = __name, \
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.pins = __data, \
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.npins = ARRAY_SIZE(__data), \
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}
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struct wmt_pinctrl_bank_registers {
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u32 reg_en;
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u32 reg_dir;
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u32 reg_data_out;
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u32 reg_data_in;
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u32 reg_pull_en;
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u32 reg_pull_cfg;
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};
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struct wmt_pinctrl_group {
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const char *name;
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const unsigned int *pins;
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const unsigned npins;
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};
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struct wmt_pinctrl_data {
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struct device *dev;
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struct pinctrl_dev *pctl_dev;
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/* must be initialized before calling wmt_pinctrl_probe */
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void __iomem *base;
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const struct wmt_pinctrl_bank_registers *banks;
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const struct pinctrl_pin_desc *pins;
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const char * const *groups;
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u32 nbanks;
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u32 npins;
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u32 ngroups;
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struct gpio_chip gpio_chip;
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struct pinctrl_gpio_range gpio_range;
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};
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int wmt_pinctrl_probe(struct platform_device *pdev,
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struct wmt_pinctrl_data *data);
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int wmt_pinctrl_remove(struct platform_device *pdev);
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