drivers/watchdog/mlx_wdt.c

56 static void mlxreg_wdt_check_card_reset(struct mlxreg_wdt *wdt)
62 	if (wdt->reset_idx == -EINVAL)
65 	if (!(wdt->wdd.info->options & WDIOF_CARDRESET))
68 	reg_data = &wdt->pdata->data[wdt->reset_idx];
69 	rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
72 			wdt->wdd.bootstatus = WDIOF_CARDRESET;
73 			dev_info(wdt->wdd.parent,
81 	struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
82 	struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->action_idx];
84 	return regmap_update_bits(wdt->regmap, reg_data->reg, ~reg_data->mask,
90 	struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
91 	struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->action_idx];
93 	return regmap_update_bits(wdt->regmap, reg_data->reg, ~reg_data->mask,
99 	struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
100 	struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->ping_idx];
102 	return regmap_write_bits(wdt->regmap, reg_data->reg, ~reg_data->mask,
109 	struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
110 	struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->timeout_idx];
114 	switch (wdt->wdt_type) {
116 		rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
124 		rc = regmap_write(wdt->regmap, reg_data->reg, regval);
128 		rc = regmap_write(wdt->regmap, reg_data->reg, timeout);
133 		if (wdt->regmap_val_sz == 1) {
135 			rc = regmap_write(wdt->regmap, reg_data->reg, regval);
138 				rc = regmap_write(wdt->regmap,
142 			rc = regmap_write(wdt->regmap, reg_data->reg, timeout);
167 	struct mlxreg_wdt *wdt = watchdog_get_drvdata(wdd);
168 	struct mlxreg_core_data *reg_data = &wdt->pdata->data[wdt->tleft_idx];
172 	if (wdt->wdt_type == MLX_WDT_TYPE2) {
173 		rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
176 		if (wdt->regmap_val_sz == 1) {
177 			rc = regmap_read(wdt->regmap, reg_data->reg, &lsb);
179 				rc = regmap_read(wdt->regmap,
184 			rc = regmap_read(wdt->regmap, reg_data->reg, &regval);
212 	.identity	= "mlx-wdt-main",
218 	.identity	= "mlx-wdt-aux",
221 static void mlxreg_wdt_config(struct mlxreg_wdt *wdt,
227 	wdt->reset_idx = -EINVAL;
230 			wdt->action_idx = i;
232 			wdt->timeout_idx = i;
234 			wdt->tleft_idx = i;
236 			wdt->ping_idx = i;
238 			wdt->reset_idx = i;
241 	wdt->pdata = pdata;
244 		wdt->wdd.info = &mlxreg_wdt_main_info;
246 		wdt->wdd.info = &mlxreg_wdt_aux_info;
248 	wdt->wdt_type = pdata->version;
249 	switch (wdt->wdt_type) {
251 		wdt->wdd.ops = &mlxreg_wdt_ops_type1;
252 		wdt->wdd.max_timeout = MLXREG_WDT_MAX_TIMEOUT_TYPE1;
255 		wdt->wdd.ops = &mlxreg_wdt_ops_type2;
256 		wdt->wdd.max_timeout = MLXREG_WDT_MAX_TIMEOUT_TYPE2;
259 		wdt->wdd.ops = &mlxreg_wdt_ops_type2;
260 		wdt->wdd.max_timeout = MLXREG_WDT_MAX_TIMEOUT_TYPE3;
266 	wdt->wdd.min_timeout = MLXREG_WDT_MIN_TIMEOUT;
269 static int mlxreg_wdt_init_timeout(struct mlxreg_wdt *wdt,
274 	timeout = pdata->data[wdt->timeout_idx].health_cntr;
275 	return mlxreg_wdt_set_timeout(&wdt->wdd, timeout);
282 	struct mlxreg_wdt *wdt;
290 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
291 	if (!wdt)
294 	wdt->wdd.parent = dev;
295 	wdt->regmap = pdata->regmap;
296 	rc = regmap_get_val_bytes(wdt->regmap);
300 	wdt->regmap_val_sz = rc;
301 	mlxreg_wdt_config(wdt, pdata);
304 		watchdog_set_nowayout(&wdt->wdd, WATCHDOG_NOWAYOUT);
305 	watchdog_stop_on_reboot(&wdt->wdd);
306 	watchdog_stop_on_unregister(&wdt->wdd);
307 	watchdog_set_drvdata(&wdt->wdd, wdt);
308 	rc = mlxreg_wdt_init_timeout(wdt, pdata);
313 		rc = mlxreg_wdt_start(&wdt->wdd);
316 		set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);
318 	mlxreg_wdt_check_card_reset(wdt);
319 	rc = devm_watchdog_register_device(dev, &wdt->wdd);
330 			.name = "mlx-wdt",
339 MODULE_ALIAS("platform:mlx-wdt");