^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) * Watchdog driver for DA9063 PMICs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright(c) 2012 Dialog Semiconductor Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Mariusz Wojtasik <mariusz.wojtasik@diasemi.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/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/watchdog.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/da9063/registers.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/da9063/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Watchdog selector to timeout in seconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * 0: WDT disabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * others: timeout = 2048 ms * 2^(TWDSCALE-1).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define DA9063_TWDSCALE_DISABLE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define DA9063_TWDSCALE_MIN 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define DA9063_TWDSCALE_MAX (ARRAY_SIZE(wdt_timeout) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define DA9063_WDT_MIN_TIMEOUT wdt_timeout[DA9063_TWDSCALE_MIN]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define DA9063_WDT_MAX_TIMEOUT wdt_timeout[DA9063_TWDSCALE_MAX]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define DA9063_WDG_TIMEOUT wdt_timeout[3]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define DA9063_RESET_PROTECTION_MS 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static unsigned int da9063_wdt_timeout_to_sel(unsigned int secs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) for (i = DA9063_TWDSCALE_MIN; i <= DA9063_TWDSCALE_MAX; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (wdt_timeout[i] >= secs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return DA9063_TWDSCALE_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * Read the currently active timeout.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * Zero means the watchdog is disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static unsigned int da9063_wdt_read_timeout(struct da9063 *da9063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) regmap_read(da9063->regmap, DA9063_REG_CONTROL_D, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return wdt_timeout[val & DA9063_TWDSCALE_MASK];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static int da9063_wdt_disable_timer(struct da9063 *da9063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) DA9063_TWDSCALE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) DA9063_TWDSCALE_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) da9063_wdt_update_timeout(struct da9063 *da9063, unsigned int timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned int regval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * The watchdog triggers a reboot if a timeout value is already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * programmed because the timeout value combines two functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * in one: indicating the counter limit and starting the watchdog.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * The watchdog must be disabled to be able to change the timeout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * value if the watchdog is already running. Then we can set the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * new timeout value which enables the watchdog again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ret = da9063_wdt_disable_timer(da9063);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) usleep_range(150, 300);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) regval = da9063_wdt_timeout_to_sel(timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) DA9063_TWDSCALE_MASK, regval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static int da9063_wdt_start(struct watchdog_device *wdd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct da9063 *da9063 = watchdog_get_drvdata(wdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ret = da9063_wdt_update_timeout(da9063, wdd->timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) dev_err(da9063->dev, "Watchdog failed to start (err = %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int da9063_wdt_stop(struct watchdog_device *wdd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct da9063 *da9063 = watchdog_get_drvdata(wdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ret = da9063_wdt_disable_timer(da9063);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) dev_alert(da9063->dev, "Watchdog failed to stop (err = %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static int da9063_wdt_ping(struct watchdog_device *wdd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct da9063 *da9063 = watchdog_get_drvdata(wdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ret = regmap_write(da9063->regmap, DA9063_REG_CONTROL_F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) DA9063_WATCHDOG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) dev_alert(da9063->dev, "Failed to ping the watchdog (err = %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int da9063_wdt_set_timeout(struct watchdog_device *wdd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) unsigned int timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct da9063 *da9063 = watchdog_get_drvdata(wdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int ret = 0;
^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) * There are two cases when a set_timeout() will be called:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * 1. The watchdog is off and someone wants to set the timeout for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * further use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * 2. The watchdog is already running and a new timeout value should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * The watchdog can't store a timeout value not equal zero without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * enabling the watchdog, so the timeout must be buffered by the driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (watchdog_active(wdd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = da9063_wdt_update_timeout(da9063, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) dev_err(da9063->dev, "Failed to set watchdog timeout (err = %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) wdd->timeout = wdt_timeout[da9063_wdt_timeout_to_sel(timeout)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int da9063_wdt_restart(struct watchdog_device *wdd, unsigned long action,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct da9063 *da9063 = watchdog_get_drvdata(wdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ret = regmap_write(da9063->regmap, DA9063_REG_CONTROL_F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) DA9063_SHUTDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) dev_alert(da9063->dev, "Failed to shutdown (err = %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static const struct watchdog_info da9063_watchdog_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .identity = "DA9063 Watchdog",
^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 const struct watchdog_ops da9063_watchdog_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .start = da9063_wdt_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .stop = da9063_wdt_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .ping = da9063_wdt_ping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .set_timeout = da9063_wdt_set_timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) .restart = da9063_wdt_restart,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int da9063_wdt_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct da9063 *da9063;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct watchdog_device *wdd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) unsigned int timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (!dev->parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) da9063 = dev_get_drvdata(dev->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (!da9063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) wdd = devm_kzalloc(dev, sizeof(*wdd), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!wdd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) wdd->info = &da9063_watchdog_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) wdd->ops = &da9063_watchdog_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) wdd->min_timeout = DA9063_WDT_MIN_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) wdd->max_timeout = DA9063_WDT_MAX_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) wdd->min_hw_heartbeat_ms = DA9063_RESET_PROTECTION_MS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) wdd->parent = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) wdd->status = WATCHDOG_NOWAYOUT_INIT_STATUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) watchdog_set_restart_priority(wdd, 128);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) watchdog_set_drvdata(wdd, da9063);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) wdd->timeout = DA9063_WDG_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /* Use pre-configured timeout if watchdog is already running. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) timeout = da9063_wdt_read_timeout(da9063);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) wdd->timeout = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* Set timeout, maybe override it with DT value, scale it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) watchdog_init_timeout(wdd, 0, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) da9063_wdt_set_timeout(wdd, wdd->timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /* Update timeout if the watchdog is already running. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) da9063_wdt_update_timeout(da9063, wdd->timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) set_bit(WDOG_HW_RUNNING, &wdd->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return devm_watchdog_register_device(dev, wdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static struct platform_driver da9063_wdt_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) .probe = da9063_wdt_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) .name = DA9063_DRVNAME_WATCHDOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) module_platform_driver(da9063_wdt_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) MODULE_AUTHOR("Mariusz Wojtasik <mariusz.wojtasik@diasemi.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) MODULE_DESCRIPTION("Watchdog driver for Dialog DA9063");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) MODULE_ALIAS("platform:" DA9063_DRVNAME_WATCHDOG);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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