1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2022 Hewlett-Packard Enterprise Development Company, L.P. */
23 static bool fan_installed(struct device *dev, int fan)  in fan_installed()  argument
28 	val = readb(drvdata->plreg + OFS_FAN_INST);  in fan_installed()
30 	return !!(val & BIT(fan));  in fan_installed()
33 static long fan_failed(struct device *dev, int fan)  in fan_failed()  argument
38 	val = readb(drvdata->plreg + OFS_FAN_FAIL);  in fan_failed()
40 	return !!(val & BIT(fan));  in fan_failed()
43 static long fan_enabled(struct device *dev, int fan)  in fan_enabled()  argument
50 	 * reported for the PWM will be incorrect. Report fan as  in fan_enabled()
53 	val = readl(drvdata->fn2 + OFS_SEVSTAT);  in fan_enabled()
55 	return !!((val & BIT(POWER_BIT)) && fan_installed(dev, fan));  in fan_enabled()
65 			return -EINVAL;  in gxp_pwm_write()
66 		writeb(val, drvdata->base + channel);  in gxp_pwm_write()
69 		return -EOPNOTSUPP;  in gxp_pwm_write()
80 		return -EOPNOTSUPP;  in gxp_fan_ctrl_write()
94 		return -EOPNOTSUPP;  in gxp_fan_read()
109 	reg = readl(drvdata->fn2 + OFS_SEVSTAT);  in gxp_pwm_read()
112 		*val = fan_installed(dev, channel) ? readb(drvdata->base + channel) : 0;  in gxp_pwm_read()
128 		return -EOPNOTSUPP;  in gxp_fan_ctrl_read()
172 	HWMON_CHANNEL_INFO(fan,
202 	struct device *dev = &pdev->dev;  in gxp_fan_ctrl_probe()
208 		return -ENOMEM;  in gxp_fan_ctrl_probe()
210 	drvdata->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);  in gxp_fan_ctrl_probe()
211 	if (IS_ERR(drvdata->base))  in gxp_fan_ctrl_probe()
212 		return dev_err_probe(dev, PTR_ERR(drvdata->base),  in gxp_fan_ctrl_probe()
215 	drvdata->plreg = devm_platform_ioremap_resource_byname(pdev,  in gxp_fan_ctrl_probe()
217 	if (IS_ERR(drvdata->plreg))  in gxp_fan_ctrl_probe()
218 		return dev_err_probe(dev, PTR_ERR(drvdata->plreg),  in gxp_fan_ctrl_probe()
221 	drvdata->fn2 = devm_platform_ioremap_resource_byname(pdev,  in gxp_fan_ctrl_probe()
223 	if (IS_ERR(drvdata->fn2))  in gxp_fan_ctrl_probe()
224 		return dev_err_probe(dev, PTR_ERR(drvdata->fn2),  in gxp_fan_ctrl_probe()
227 	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev,  in gxp_fan_ctrl_probe()
237 	{ .compatible = "hpe,gxp-fan-ctrl", },
245 		.name	= "gxp-fan-ctrl",
252 MODULE_DESCRIPTION("HPE GXP fan controller");