^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 the wm831x PMICs
^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
^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/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^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/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/watchdog.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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/wm831x/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/wm831x/pdata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/wm831x/watchdog.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static bool nowayout = WATCHDOG_NOWAYOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) module_param(nowayout, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_PARM_DESC(nowayout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) "Watchdog cannot be stopped once started (default="
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct wm831x_wdt_drvdata {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct watchdog_device wdt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct wm831x *wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int update_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* We can't use the sub-second values here but they're included
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * for completeness. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned int time; /* Seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u16 val; /* WDOG_TO value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) } wm831x_wdt_cfgs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) { 1, 2 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) { 2, 3 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) { 4, 4 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) { 8, 5 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) { 16, 6 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) { 32, 7 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) { 33, 7 }, /* Actually 32.768s so include both, others round down */
^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) static int wm831x_wdt_start(struct watchdog_device *wdt_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct wm831x_wdt_drvdata *driver_data = watchdog_get_drvdata(wdt_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct wm831x *wm831x = driver_data->wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) mutex_lock(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ret = wm831x_reg_unlock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) ret = wm831x_set_bits(wm831x, WM831X_WATCHDOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) WM831X_WDOG_ENA, WM831X_WDOG_ENA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) wm831x_reg_lock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dev_err(wm831x->dev, "Failed to unlock security key: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) mutex_unlock(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int wm831x_wdt_stop(struct watchdog_device *wdt_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct wm831x_wdt_drvdata *driver_data = watchdog_get_drvdata(wdt_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct wm831x *wm831x = driver_data->wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) mutex_lock(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ret = wm831x_reg_unlock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ret = wm831x_set_bits(wm831x, WM831X_WATCHDOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) WM831X_WDOG_ENA, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) wm831x_reg_lock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) dev_err(wm831x->dev, "Failed to unlock security key: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) mutex_unlock(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static int wm831x_wdt_ping(struct watchdog_device *wdt_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct wm831x_wdt_drvdata *driver_data = watchdog_get_drvdata(wdt_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct wm831x *wm831x = driver_data->wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) u16 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mutex_lock(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) reg = wm831x_reg_read(wm831x, WM831X_WATCHDOG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (!(reg & WM831X_WDOG_RST_SRC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) dev_err(wm831x->dev, "Hardware watchdog update unsupported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) reg |= WM831X_WDOG_RESET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ret = wm831x_reg_unlock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) ret = wm831x_reg_write(wm831x, WM831X_WATCHDOG, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) wm831x_reg_lock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) dev_err(wm831x->dev, "Failed to unlock security key: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ret);
^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) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) mutex_unlock(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int wm831x_wdt_set_timeout(struct watchdog_device *wdt_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) unsigned int timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct wm831x_wdt_drvdata *driver_data = watchdog_get_drvdata(wdt_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct wm831x *wm831x = driver_data->wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) for (i = 0; i < ARRAY_SIZE(wm831x_wdt_cfgs); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (wm831x_wdt_cfgs[i].time == timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (i == ARRAY_SIZE(wm831x_wdt_cfgs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = wm831x_reg_unlock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ret = wm831x_set_bits(wm831x, WM831X_WATCHDOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) WM831X_WDOG_TO_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) wm831x_wdt_cfgs[i].val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) wm831x_reg_lock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) dev_err(wm831x->dev, "Failed to unlock security key: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) wdt_dev->timeout = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return ret;
^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 const struct watchdog_info wm831x_wdt_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .identity = "WM831x Watchdog",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static const struct watchdog_ops wm831x_wdt_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .start = wm831x_wdt_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .stop = wm831x_wdt_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .ping = wm831x_wdt_ping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .set_timeout = wm831x_wdt_set_timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int wm831x_wdt_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct wm831x *wm831x = dev_get_drvdata(dev->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct wm831x_pdata *chip_pdata = dev_get_platdata(dev->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct wm831x_watchdog_pdata *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct wm831x_wdt_drvdata *driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct watchdog_device *wm831x_wdt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int reg, ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) ret = wm831x_reg_read(wm831x, WM831X_WATCHDOG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) dev_err(wm831x->dev, "Failed to read watchdog status: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) reg = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (reg & WM831X_WDOG_DEBUG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) dev_warn(wm831x->dev, "Watchdog is paused\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) driver_data = devm_kzalloc(dev, sizeof(*driver_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (!driver_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) mutex_init(&driver_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) driver_data->wm831x = wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) wm831x_wdt = &driver_data->wdt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) wm831x_wdt->info = &wm831x_wdt_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) wm831x_wdt->ops = &wm831x_wdt_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) wm831x_wdt->parent = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) watchdog_set_nowayout(wm831x_wdt, nowayout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) watchdog_set_drvdata(wm831x_wdt, driver_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) reg = wm831x_reg_read(wm831x, WM831X_WATCHDOG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) reg &= WM831X_WDOG_TO_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) for (i = 0; i < ARRAY_SIZE(wm831x_wdt_cfgs); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (wm831x_wdt_cfgs[i].val == reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (i == ARRAY_SIZE(wm831x_wdt_cfgs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) dev_warn(wm831x->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) "Unknown watchdog timeout: %x\n", reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) wm831x_wdt->timeout = wm831x_wdt_cfgs[i].time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* Apply any configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (chip_pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) pdata = chip_pdata->watchdog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) pdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) reg &= ~(WM831X_WDOG_SECACT_MASK | WM831X_WDOG_PRIMACT_MASK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) WM831X_WDOG_RST_SRC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) reg |= pdata->primary << WM831X_WDOG_PRIMACT_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) reg |= pdata->secondary << WM831X_WDOG_SECACT_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) reg |= pdata->software << WM831X_WDOG_RST_SRC_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) ret = wm831x_reg_unlock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) ret = wm831x_reg_write(wm831x, WM831X_WATCHDOG, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) wm831x_reg_lock(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) dev_err(wm831x->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) "Failed to unlock security key: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^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) return devm_watchdog_register_device(dev, &driver_data->wdt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static struct platform_driver wm831x_wdt_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) .probe = wm831x_wdt_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) .name = "wm831x-watchdog",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) module_platform_driver(wm831x_wdt_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) MODULE_AUTHOR("Mark Brown");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) MODULE_DESCRIPTION("WM831x Watchdog");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) MODULE_ALIAS("platform:wm831x-watchdog");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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