^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * LED driver for WM831x status LEDs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright(C) 2009 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mfd/wm831x/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/wm831x/pdata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/wm831x/status.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct wm831x_status {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct wm831x *wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) spinlock_t value_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int reg; /* Control register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int reg_val; /* Control register value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int blink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int blink_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int blink_cyc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) enum led_brightness brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define to_wm831x_status(led_cdev) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) container_of(led_cdev, struct wm831x_status, cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static void wm831x_status_set(struct wm831x_status *led)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) mutex_lock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) led->reg_val &= ~(WM831X_LED_SRC_MASK | WM831X_LED_MODE_MASK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) WM831X_LED_DUTY_CYC_MASK | WM831X_LED_DUR_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) spin_lock_irqsave(&led->value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) led->reg_val |= led->src << WM831X_LED_SRC_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (led->blink) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) led->reg_val |= 2 << WM831X_LED_MODE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) led->reg_val |= led->blink_time << WM831X_LED_DUR_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) led->reg_val |= led->blink_cyc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (led->brightness != LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) led->reg_val |= 1 << WM831X_LED_MODE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) spin_unlock_irqrestore(&led->value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) wm831x_reg_write(led->wm831x, led->reg, led->reg_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) mutex_unlock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int wm831x_status_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct wm831x_status *led = to_wm831x_status(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) spin_lock_irqsave(&led->value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) led->brightness = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (value == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) led->blink = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) spin_unlock_irqrestore(&led->value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) wm831x_status_set(led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static int wm831x_status_blink_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) unsigned long *delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) unsigned long *delay_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct wm831x_status *led = to_wm831x_status(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /* Pick some defaults if we've not been given times */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (*delay_on == 0 && *delay_off == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *delay_on = 250;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) *delay_off = 250;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) spin_lock_irqsave(&led->value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* We only have a limited selection of settings, see if we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * support the configuration we're being given */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) switch (*delay_on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) case 1000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) led->blink_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) case 250:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) led->blink_time = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) case 125:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) led->blink_time = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) case 62:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) case 63:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* Actually 62.5ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) led->blink_time = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) ret = -EINVAL;
^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) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) switch (*delay_off / *delay_on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) led->blink_cyc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) led->blink_cyc = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) led->blink_cyc = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) case 8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) led->blink_cyc = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) led->blink = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) led->blink = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) spin_unlock_irqrestore(&led->value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) wm831x_status_set(led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static const char * const led_src_texts[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) "otp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) "power",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) "charger",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) "soft",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static ssize_t wm831x_status_src_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct wm831x_status *led = to_wm831x_status(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) mutex_lock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) for (i = 0; i < ARRAY_SIZE(led_src_texts); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (i == led->src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) ret += sprintf(&buf[ret], "[%s] ", led_src_texts[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) ret += sprintf(&buf[ret], "%s ", led_src_texts[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) mutex_unlock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) ret += sprintf(&buf[ret], "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static ssize_t wm831x_status_src_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct wm831x_status *led = to_wm831x_status(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) i = sysfs_match_string(led_src_texts, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (i >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) mutex_lock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) led->src = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) mutex_unlock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) wm831x_status_set(led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static DEVICE_ATTR(src, 0644, wm831x_status_src_show, wm831x_status_src_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static struct attribute *wm831x_status_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) &dev_attr_src.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ATTRIBUTE_GROUPS(wm831x_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static int wm831x_status_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct wm831x_pdata *chip_pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) struct wm831x_status_pdata pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct wm831x_status *drvdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) int id = pdev->id % ARRAY_SIZE(chip_pdata->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) res = platform_get_resource(pdev, IORESOURCE_REG, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (res == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) dev_err(&pdev->dev, "No register resource\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) drvdata = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_status),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (!drvdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) drvdata->wm831x = wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) drvdata->reg = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (dev_get_platdata(wm831x->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) chip_pdata = dev_get_platdata(wm831x->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) chip_pdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) memset(&pdata, 0, sizeof(pdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (chip_pdata && chip_pdata->status[id])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) memcpy(&pdata, chip_pdata->status[id], sizeof(pdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) pdata.name = dev_name(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) mutex_init(&drvdata->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) spin_lock_init(&drvdata->value_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* We cache the configuration register and read startup values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * from it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) drvdata->reg_val = wm831x_reg_read(wm831x, drvdata->reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (drvdata->reg_val & WM831X_LED_MODE_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) drvdata->brightness = LED_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) drvdata->brightness = LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* Set a default source if configured, otherwise leave the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * current hardware setting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (pdata.default_src == WM831X_STATUS_PRESERVE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) drvdata->src = drvdata->reg_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) drvdata->src &= WM831X_LED_SRC_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) drvdata->src >>= WM831X_LED_SRC_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) drvdata->src = pdata.default_src - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) drvdata->cdev.name = pdata.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) drvdata->cdev.default_trigger = pdata.default_trigger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) drvdata->cdev.brightness_set_blocking = wm831x_status_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) drvdata->cdev.blink_set = wm831x_status_blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) drvdata->cdev.groups = wm831x_status_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) ret = led_classdev_register(wm831x->dev, &drvdata->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) dev_err(&pdev->dev, "Failed to register LED: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) platform_set_drvdata(pdev, drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static int wm831x_status_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct wm831x_status *drvdata = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) led_classdev_unregister(&drvdata->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static struct platform_driver wm831x_status_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) .name = "wm831x-status",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) .probe = wm831x_status_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) .remove = wm831x_status_remove,
^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) module_platform_driver(wm831x_status_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) MODULE_DESCRIPTION("WM831x status LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) MODULE_ALIAS("platform:wm831x-status");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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