3  * The Gateworks System Controller (GSC) is a multi-function
15 #include <linux/mfd/gsc.h>
26  * The GSC suffers from an errata where occasionally during
72  * gsc_powerdown - API to use GSC to power down board for a specific time
76 static int gsc_powerdown(struct gsc_dev *gsc, unsigned long secs)  in gsc_powerdown()  argument
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()
108 	struct gsc_dev *gsc = dev_get_drvdata(dev);  in gsc_show()  local
113 		rz = sprintf(buf, "%d\n", gsc->fwver);  in gsc_show()
115 		rz = sprintf(buf, "0x%04x\n", gsc->fwcrc);  in gsc_show()
125 	struct gsc_dev *gsc = dev_get_drvdata(dev);  in gsc_store()  local
131 			gsc_powerdown(gsc, value);  in gsc_store()
158 	{ .compatible = "gw,gsc", },
187 	.name = "gateworks-gsc",
201 	struct gsc_dev *gsc;  in gsc_probe()  local
206 	gsc = devm_kzalloc(dev, sizeof(*gsc), GFP_KERNEL);  in gsc_probe()
207 	if (!gsc)  in gsc_probe()
210 	gsc->dev = &client->dev;  in gsc_probe()
211 	gsc->i2c = client;  in gsc_probe()
212 	i2c_set_clientdata(client, gsc);  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()
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()
267 		.name	= "gateworks-gsc",
276 MODULE_DESCRIPTION("I2C Core interface for GSC");