1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Pinctrl driver for the Wondermedia SoC's 4 * 5 * Copyright (c) 2013 Tony Prisk <linux@prisktech.co.nz> 6 */ 7 8 #include <linux/gpio/driver.h> 9 10 /* VT8500 has no enable register in the extgpio bank. */ 11 #define NO_REG 0xFFFF 12 13 #define WMT_PINCTRL_BANK(__en, __dir, __dout, __din, __pen, __pcfg) \ 14 { \ 15 .reg_en = __en, \ 16 .reg_dir = __dir, \ 17 .reg_data_out = __dout, \ 18 .reg_data_in = __din, \ 19 .reg_pull_en = __pen, \ 20 .reg_pull_cfg = __pcfg, \ 21 } 22 23 /* Encode/decode the bank/bit pairs into a pin value */ 24 #define WMT_PIN(__bank, __offset) ((__bank << 5) | __offset) 25 #define WMT_BANK_FROM_PIN(__pin) (__pin >> 5) 26 #define WMT_BIT_FROM_PIN(__pin) (__pin & 0x1f) 27 28 #define WMT_GROUP(__name, __data) \ 29 { \ 30 .name = __name, \ 31 .pins = __data, \ 32 .npins = ARRAY_SIZE(__data), \ 33 } 34 35 struct wmt_pinctrl_bank_registers { 36 u32 reg_en; 37 u32 reg_dir; 38 u32 reg_data_out; 39 u32 reg_data_in; 40 41 u32 reg_pull_en; 42 u32 reg_pull_cfg; 43 }; 44 45 struct wmt_pinctrl_group { 46 const char *name; 47 const unsigned int *pins; 48 const unsigned npins; 49 }; 50 51 struct wmt_pinctrl_data { 52 struct device *dev; 53 struct pinctrl_dev *pctl_dev; 54 55 /* must be initialized before calling wmt_pinctrl_probe */ 56 void __iomem *base; 57 const struct wmt_pinctrl_bank_registers *banks; 58 const struct pinctrl_pin_desc *pins; 59 const char * const *groups; 60 61 u32 nbanks; 62 u32 npins; 63 u32 ngroups; 64 65 struct gpio_chip gpio_chip; 66 struct pinctrl_gpio_range gpio_range; 67 }; 68 69 int wmt_pinctrl_probe(struct platform_device *pdev, 70 struct wmt_pinctrl_data *data); 71