1 // SPDX-License-Identifier: GPL-2.0
20 #include <linux/hwmon-sysfs.h>
25 #include <linux/platform_data/x86/simatic-ipc-base.h>
28 #include "simatic-ipc-batt.h"
39 	struct gpio_desc *gpios[3];  member
47 	if (priv.gpios[2]) {  in simatic_ipc_batt_read_gpio()
48 		gpiod_set_value(priv.gpios[2], 1);  in simatic_ipc_batt_read_gpio()
52 	if (gpiod_get_value_cansleep(priv.gpios[0]))  in simatic_ipc_batt_read_gpio()
54 	else if (gpiod_get_value_cansleep(priv.gpios[1]))  in simatic_ipc_batt_read_gpio()
57 	if (priv.gpios[2])  in simatic_ipc_batt_read_gpio()
58 		gpiod_set_value(priv.gpios[2], 0);  in simatic_ipc_batt_read_gpio()
73 	if (!request_muxed_region(res->start, resource_size(res), res->name)) {  in simatic_ipc_batt_read_io()
75 		return -EBUSY;  in simatic_ipc_batt_read_io()
108 static int simatic_ipc_batt_read(struct device *dev, enum hwmon_sensor_types type,  in simatic_ipc_batt_read()
109 				 u32 attr, int channel, long *val)  in simatic_ipc_batt_read()
119 		return -EOPNOTSUPP;  in simatic_ipc_batt_read()
126 					   u32 attr, int channel)  in simatic_ipc_batt_is_visible()
149 int simatic_ipc_batt_remove(struct platform_device *pdev, struct gpiod_lookup_table *table)  in simatic_ipc_batt_remove()
156 int simatic_ipc_batt_probe(struct platform_device *pdev, struct gpiod_lookup_table *table)  in simatic_ipc_batt_probe()
159 	struct device *dev = &pdev->dev;  in simatic_ipc_batt_probe()
162 	int err;  in simatic_ipc_batt_probe()
164 	plat = pdev->dev.platform_data;  in simatic_ipc_batt_probe()
165 	priv.devmode = plat->devmode;  in simatic_ipc_batt_probe()
173 		table->dev_id = dev_name(dev);  in simatic_ipc_batt_probe()
179 		return -ENODEV;  in simatic_ipc_batt_probe()
182 	priv.gpios[0] = devm_gpiod_get_index(dev, "CMOSBattery empty", 0, GPIOD_IN);  in simatic_ipc_batt_probe()
183 	if (IS_ERR(priv.gpios[0])) {  in simatic_ipc_batt_probe()
184 		err = PTR_ERR(priv.gpios[0]);  in simatic_ipc_batt_probe()
185 		priv.gpios[0] = NULL;  in simatic_ipc_batt_probe()
188 	priv.gpios[1] = devm_gpiod_get_index(dev, "CMOSBattery low", 1, GPIOD_IN);  in simatic_ipc_batt_probe()
189 	if (IS_ERR(priv.gpios[1])) {  in simatic_ipc_batt_probe()
190 		err = PTR_ERR(priv.gpios[1]);  in simatic_ipc_batt_probe()
191 		priv.gpios[1] = NULL;  in simatic_ipc_batt_probe()
195 	if (table->table[2].key) {  in simatic_ipc_batt_probe()
200 		priv.gpios[2] = devm_gpiod_get_index(dev, "CMOSBattery meter", 2, flags);  in simatic_ipc_batt_probe()
201 		if (IS_ERR(priv.gpios[2])) {  in simatic_ipc_batt_probe()
202 			err = PTR_ERR(priv.gpios[2]);  in simatic_ipc_batt_probe()
203 			priv.gpios[2] = NULL;  in simatic_ipc_batt_probe()
207 		priv.gpios[2] = NULL;  in simatic_ipc_batt_probe()
231 static int simatic_ipc_batt_io_remove(struct platform_device *pdev)  in simatic_ipc_batt_io_remove()
236 static int simatic_ipc_batt_io_probe(struct platform_device *pdev)  in simatic_ipc_batt_io_probe()