1 /* 2 * Pinctrl driver for the Wondermedia SoC's 3 * 4 * Copyright (c) 2013 Tony Prisk <linux@prisktech.co.nz> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 */ 15 16 #include <linux/gpio.h> 17 18 /* VT8500 has no enable register in the extgpio bank. */ 19 #define NO_REG 0xFFFF 20 21 #define WMT_PINCTRL_BANK(__en, __dir, __dout, __din, __pen, __pcfg) \ 22 { \ 23 .reg_en = __en, \ 24 .reg_dir = __dir, \ 25 .reg_data_out = __dout, \ 26 .reg_data_in = __din, \ 27 .reg_pull_en = __pen, \ 28 .reg_pull_cfg = __pcfg, \ 29 } 30 31 /* Encode/decode the bank/bit pairs into a pin value */ 32 #define WMT_PIN(__bank, __offset) ((__bank << 5) | __offset) 33 #define WMT_BANK_FROM_PIN(__pin) (__pin >> 5) 34 #define WMT_BIT_FROM_PIN(__pin) (__pin & 0x1f) 35 36 #define WMT_GROUP(__name, __data) \ 37 { \ 38 .name = __name, \ 39 .pins = __data, \ 40 .npins = ARRAY_SIZE(__data), \ 41 } 42 43 struct wmt_pinctrl_bank_registers { 44 u32 reg_en; 45 u32 reg_dir; 46 u32 reg_data_out; 47 u32 reg_data_in; 48 49 u32 reg_pull_en; 50 u32 reg_pull_cfg; 51 }; 52 53 struct wmt_pinctrl_group { 54 const char *name; 55 const unsigned int *pins; 56 const unsigned npins; 57 }; 58 59 struct wmt_pinctrl_data { 60 struct device *dev; 61 struct pinctrl_dev *pctl_dev; 62 63 /* must be initialized before calling wmt_pinctrl_probe */ 64 void __iomem *base; 65 const struct wmt_pinctrl_bank_registers *banks; 66 const struct pinctrl_pin_desc *pins; 67 const char * const *groups; 68 69 u32 nbanks; 70 u32 npins; 71 u32 ngroups; 72 73 struct gpio_chip gpio_chip; 74 struct pinctrl_gpio_range gpio_range; 75 }; 76 77 int wmt_pinctrl_probe(struct platform_device *pdev, 78 struct wmt_pinctrl_data *data); 79 int wmt_pinctrl_remove(struct platform_device *pdev); 80