^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) // Copyright (c) 2018 Crane Merchandising Systems. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Copyright (C) 2018 Oleh Kravchenko <oleg@kaa.org.ua>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * CR0014114 SPI protocol descrtiption:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * +----+-----------------------------------+----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * | CMD| BRIGHTNESS |CRC |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * +----+-----------------------------------+----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * | | LED0| LED1| LED2| LED3| LED4| LED5| |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * | |R|G|B|R|G|B|R|G|B|R|G|B|R|G|B|R|G|B| |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * | 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * | |1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1| |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * | | 18 | |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * +----+-----------------------------------+----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * | 20 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * +---------------------------------------------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * PS: Boards can be connected to the chain:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * SPI -> board0 -> board1 -> board2 ..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* CR0014114 SPI commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define CR_SET_BRIGHTNESS 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define CR_INIT_REENUMERATE 0x81
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define CR_NEXT_REENUMERATE 0x82
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* CR0014114 default settings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define CR_MAX_BRIGHTNESS GENMASK(6, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define CR_FW_DELAY_MSEC 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define CR_RECOUNT_DELAY (HZ * 3600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define CR_DEV_NAME "cr0014114"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct cr0014114_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct cr0014114 *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct led_classdev ldev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) u8 brightness;
^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) struct cr0014114 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) bool do_recount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) size_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct delayed_work work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct spi_device *spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u8 *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned long delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct cr0014114_led leds[];
^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 void cr0014114_calc_crc(u8 *buf, const size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u8 crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) for (i = 1, crc = 1; i < len - 1; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) crc += buf[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) crc |= BIT(7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* special case when CRC matches the SPI commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (crc == CR_SET_BRIGHTNESS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) crc == CR_INIT_REENUMERATE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) crc == CR_NEXT_REENUMERATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) crc = 0xfe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) buf[len - 1] = crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int cr0014114_recount(struct cr0014114 *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) u8 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) dev_dbg(priv->dev, "LEDs recount is started\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) cmd = CR_INIT_REENUMERATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = spi_write(priv->spi, &cmd, sizeof(cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) cmd = CR_NEXT_REENUMERATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) for (i = 0; i < priv->count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) msleep(CR_FW_DELAY_MSEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ret = spi_write(priv->spi, &cmd, sizeof(cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) goto err;
^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) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) dev_dbg(priv->dev, "LEDs recount is finished\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) dev_err(priv->dev, "with error %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int cr0014114_sync(struct cr0014114 *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) unsigned long udelay, now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* to avoid SPI mistiming with firmware we should wait some time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (time_after(priv->delay, now)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) udelay = jiffies_to_usecs(priv->delay - now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) usleep_range(udelay, udelay + 1);
^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) if (unlikely(priv->do_recount)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ret = cr0014114_recount(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) priv->do_recount = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) msleep(CR_FW_DELAY_MSEC);
^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) priv->buf[0] = CR_SET_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) for (i = 0; i < priv->count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) priv->buf[i + 1] = priv->leds[i].brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) cr0014114_calc_crc(priv->buf, priv->count + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ret = spi_write(priv->spi, priv->buf, priv->count + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) priv->delay = jiffies + msecs_to_jiffies(CR_FW_DELAY_MSEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static void cr0014114_recount_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct cr0014114 *priv = container_of(work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct cr0014114,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) mutex_lock(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) priv->do_recount = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) ret = cr0014114_sync(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) mutex_unlock(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) dev_warn(priv->dev, "sync of LEDs failed %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) schedule_delayed_work(&priv->work, CR_RECOUNT_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static int cr0014114_set_sync(struct led_classdev *ldev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct cr0014114_led *led = container_of(ldev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct cr0014114_led,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) ldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) dev_dbg(led->priv->dev, "Set brightness to %d\n", brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) mutex_lock(&led->priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) led->brightness = (u8)brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) ret = cr0014114_sync(led->priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) mutex_unlock(&led->priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int cr0014114_probe_dt(struct cr0014114 *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) size_t i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct cr0014114_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct fwnode_handle *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct led_init_data init_data = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) device_for_each_child_node(priv->dev, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) led = &priv->leds[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) led->priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) led->ldev.max_brightness = CR_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) led->ldev.brightness_set_blocking = cr0014114_set_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) init_data.fwnode = child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) init_data.devicename = CR_DEV_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) init_data.default_label = ":";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) ret = devm_led_classdev_register_ext(priv->dev, &led->ldev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) &init_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) dev_err(priv->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) "failed to register LED device, err %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) fwnode_handle_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static int cr0014114_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) struct cr0014114 *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) size_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) count = device_get_child_node_count(&spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) dev_err(&spi->dev, "LEDs are not defined in device tree!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) priv = devm_kzalloc(&spi->dev, struct_size(priv, leds, count),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) priv->buf = devm_kzalloc(&spi->dev, count + 2, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (!priv->buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) mutex_init(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) INIT_DELAYED_WORK(&priv->work, cr0014114_recount_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) priv->count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) priv->dev = &spi->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) priv->spi = spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) priv->delay = jiffies -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) msecs_to_jiffies(CR_FW_DELAY_MSEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) priv->do_recount = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ret = cr0014114_sync(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) dev_err(priv->dev, "first recount failed %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) priv->do_recount = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) ret = cr0014114_sync(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) dev_err(priv->dev, "second recount failed %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ret = cr0014114_probe_dt(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /* setup recount work to workaround buggy firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) schedule_delayed_work(&priv->work, CR_RECOUNT_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) spi_set_drvdata(spi, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) static int cr0014114_remove(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct cr0014114 *priv = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) cancel_delayed_work_sync(&priv->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) mutex_destroy(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static const struct of_device_id cr0014114_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) { .compatible = "crane,cr0014114", },
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) MODULE_DEVICE_TABLE(of, cr0014114_dt_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static struct spi_driver cr0014114_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) .probe = cr0014114_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) .remove = cr0014114_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) .name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .of_match_table = cr0014114_dt_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) },
^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) module_spi_driver(cr0014114_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) MODULE_AUTHOR("Oleh Kravchenko <oleg@kaa.org.ua>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) MODULE_DESCRIPTION("cr0014114 LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) MODULE_ALIAS("spi:cr0014114");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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