1 // SPDX-License-Identifier: GPL-2.0
3  * The Gateworks System Controller (GSC) is a multi-function
6  * system functions such as push-button monitoring, multiple ADC's for
40 		 * -EAGAIN returned when the i2c host controller is busy  in gsc_write()
41 		 * -EIO returned when i2c device is busy  in gsc_write()
43 		if (ret != -EAGAIN && ret != -EIO)  in gsc_write()
59 		 * -EAGAIN returned when the i2c host controller is busy  in gsc_read()
60 		 * -EIO returned when i2c device is busy  in gsc_read()
62 		if (ret != -EAGAIN && ret != -EIO)  in gsc_read()
72  * gsc_powerdown - API to use GSC to power down board for a specific time
74  * secs - number of seconds to remain powered off
81 	dev_info(&gsc->i2c->dev, "GSC powerdown for %ld seconds\n",  in gsc_powerdown()
85 	ret = regmap_bulk_write(gsc->regmap, GSC_TIME_ADD, regs, 4);  in gsc_powerdown()
89 	ret = regmap_update_bits(gsc->regmap, GSC_CTRL_1,  in gsc_powerdown()
95 	ret = regmap_update_bits(gsc->regmap, GSC_CTRL_1,  in gsc_powerdown()
109 	const char *name = attr->attr.name;  in gsc_show()
113 		rz = sprintf(buf, "%d\n", gsc->fwver);  in gsc_show()
115 		rz = sprintf(buf, "0x%04x\n", gsc->fwcrc);  in gsc_show()
126 	const char *name = attr->attr.name;  in gsc_store()
187 	.name = "gateworks-gsc",
200 	struct device *dev = &client->dev;  in gsc_probe()
208 		return -ENOMEM;  in gsc_probe()
210 	gsc->dev = &client->dev;  in gsc_probe()
211 	gsc->i2c = client;  in gsc_probe()
214 	gsc->regmap = devm_regmap_init(dev, &gsc_regmap_bus, client,  in gsc_probe()
216 	if (IS_ERR(gsc->regmap))  in gsc_probe()
217 		return PTR_ERR(gsc->regmap);  in gsc_probe()
219 	if (regmap_read(gsc->regmap, GSC_FW_VER, &reg))  in gsc_probe()
220 		return -EIO;  in gsc_probe()
221 	gsc->fwver = reg;  in gsc_probe()
223 	regmap_read(gsc->regmap, GSC_FW_CRC, &reg);  in gsc_probe()
224 	gsc->fwcrc = reg;  in gsc_probe()
225 	regmap_read(gsc->regmap, GSC_FW_CRC + 1, &reg);  in gsc_probe()
226 	gsc->fwcrc |= reg << 8;  in gsc_probe()
228 	gsc->i2c_hwmon = devm_i2c_new_dummy_device(dev, client->adapter,  in gsc_probe()
230 	if (IS_ERR(gsc->i2c_hwmon)) {  in gsc_probe()
232 		return PTR_ERR(gsc->i2c_hwmon);  in gsc_probe()
235 	ret = devm_regmap_add_irq_chip(dev, gsc->regmap, client->irq,  in gsc_probe()
243 		 gsc->fwver, gsc->fwcrc);  in gsc_probe()
245 	ret = sysfs_create_group(&dev->kobj, &attr_group);  in gsc_probe()
251 		sysfs_remove_group(&dev->kobj, &attr_group);  in gsc_probe()
260 	sysfs_remove_group(&client->dev.kobj, &attr_group);  in gsc_remove()
267 		.name	= "gateworks-gsc",