Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * gpiolib support for Wolfson WM8994
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2009 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/mfd/wm8994/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/mfd/wm8994/pdata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/mfd/wm8994/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/mfd/wm8994/registers.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) struct wm8994_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct wm8994 *wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct gpio_chip gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) static int wm8994_gpio_request(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	switch (wm8994->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	case WM8958:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		switch (offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static int wm8994_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			       WM8994_GPN_DIR, WM8994_GPN_DIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static int wm8994_gpio_get(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	ret = wm8994_reg_read(wm8994, WM8994_GPIO_1 + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (ret & WM8994_GPN_LVL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) static int wm8994_gpio_direction_out(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 				     unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		value = WM8994_GPN_LVL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			       WM8994_GPN_DIR | WM8994_GPN_LVL, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		value = WM8994_GPN_LVL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, WM8994_GPN_LVL, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int wm8994_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 				  unsigned long config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	switch (pinconf_to_config_param(config)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				       WM8994_GPN_OP_CFG_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 				       WM8994_GPN_OP_CFG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	case PIN_CONFIG_DRIVE_PUSH_PULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 				       WM8994_GPN_OP_CFG_MASK, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	return -ENOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	return regmap_irq_get_virq(wm8994->irq_data, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static const char *wm8994_gpio_fn(u16 fn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	switch (fn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	case WM8994_GP_FN_PIN_SPECIFIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		return "pin-specific";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	case WM8994_GP_FN_GPIO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return "GPIO";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	case WM8994_GP_FN_SDOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return "SDOUT";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	case WM8994_GP_FN_IRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return "IRQ";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	case WM8994_GP_FN_TEMPERATURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		return "Temperature";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	case WM8994_GP_FN_MICBIAS1_DET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return "MICBIAS1 detect";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	case WM8994_GP_FN_MICBIAS1_SHORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return "MICBIAS1 short";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	case WM8994_GP_FN_MICBIAS2_DET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		return "MICBIAS2 detect";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	case WM8994_GP_FN_MICBIAS2_SHORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		return "MICBIAS2 short";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	case WM8994_GP_FN_FLL1_LOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		return "FLL1 lock";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	case WM8994_GP_FN_FLL2_LOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return "FLL2 lock";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	case WM8994_GP_FN_SRC1_LOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		return "SRC1 lock";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	case WM8994_GP_FN_SRC2_LOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		return "SRC2 lock";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	case WM8994_GP_FN_DRC1_ACT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		return "DRC1 activity";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	case WM8994_GP_FN_DRC2_ACT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		return "DRC2 activity";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	case WM8994_GP_FN_DRC3_ACT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		return "DRC3 activity";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	case WM8994_GP_FN_WSEQ_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		return "Write sequencer";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	case WM8994_GP_FN_FIFO_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		return "FIFO error";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	case WM8994_GP_FN_OPCLK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return "OPCLK";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	case WM8994_GP_FN_THW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return "Thermal warning";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	case WM8994_GP_FN_DCS_DONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		return "DC servo";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	case WM8994_GP_FN_FLL1_OUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		return "FLL1 output";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	case WM8994_GP_FN_FLL2_OUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		return "FLL1 output";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		return "Unknown";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	for (i = 0; i < chip->ngpio; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		int gpio = i + chip->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		int reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		const char *label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		/* We report the GPIO even if it's not requested since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		 * we're also reporting things like alternate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		 * functions which apply even when the GPIO is not in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		 * use as a GPIO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		label = gpiochip_is_requested(chip, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		if (!label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			label = "Unrequested";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		seq_printf(s, " gpio-%-3d (%-20.20s) ", gpio, label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		reg = wm8994_reg_read(wm8994, WM8994_GPIO_1 + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		if (reg < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			dev_err(wm8994->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				"GPIO control %d read failed: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 				gpio, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			seq_printf(s, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		if (reg & WM8994_GPN_DIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			seq_printf(s, "in ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			seq_printf(s, "out ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		if (reg & WM8994_GPN_PU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			seq_printf(s, "pull up ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		if (reg & WM8994_GPN_PD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			seq_printf(s, "pull down ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		if (reg & WM8994_GPN_POL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			seq_printf(s, "inverted ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			seq_printf(s, "noninverted ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		if (reg & WM8994_GPN_OP_CFG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			seq_printf(s, "open drain ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			seq_printf(s, "push-pull ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		seq_printf(s, "%s (%x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			   wm8994_gpio_fn(reg & WM8994_GPN_FN_MASK), reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) #define wm8994_gpio_dbg_show NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static const struct gpio_chip template_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	.label			= "wm8994",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	.owner			= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	.request		= wm8994_gpio_request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	.direction_input	= wm8994_gpio_direction_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	.get			= wm8994_gpio_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	.direction_output	= wm8994_gpio_direction_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	.set			= wm8994_gpio_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	.set_config		= wm8994_gpio_set_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	.to_irq			= wm8994_gpio_to_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	.dbg_show		= wm8994_gpio_dbg_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	.can_sleep		= true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int wm8994_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	struct wm8994_pdata *pdata = dev_get_platdata(wm8994->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct wm8994_gpio *wm8994_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	wm8994_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm8994_gpio),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 				   GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (wm8994_gpio == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	wm8994_gpio->wm8994 = wm8994;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	wm8994_gpio->gpio_chip = template_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	wm8994_gpio->gpio_chip.ngpio = WM8994_GPIO_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	wm8994_gpio->gpio_chip.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	if (pdata && pdata->gpio_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		wm8994_gpio->gpio_chip.base = pdata->gpio_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		wm8994_gpio->gpio_chip.base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	ret = devm_gpiochip_add_data(&pdev->dev, &wm8994_gpio->gpio_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 				     wm8994_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		dev_err(&pdev->dev, "Could not register gpiochip, %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 			ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	platform_set_drvdata(pdev, wm8994_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static struct platform_driver wm8994_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.driver.name	= "wm8994-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.probe		= wm8994_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static int __init wm8994_gpio_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	return platform_driver_register(&wm8994_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) subsys_initcall(wm8994_gpio_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static void __exit wm8994_gpio_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	platform_driver_unregister(&wm8994_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) module_exit(wm8994_gpio_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) MODULE_DESCRIPTION("GPIO interface for WM8994");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) MODULE_ALIAS("platform:wm8994-gpio");