1 // SPDX-License-Identifier: GPL-2.0
19  * TempSensor reset. The RSTN can be de-asserted once the analog core has
21  * 0:reset  1:de-assert
27  * Tpu(min 50us) after PD is de-asserted. RSTN should be held low until the
41  * Temp(C)=DOUT*Y/4094 - K
65 	writel(SFCTEMP_PD, sfctemp->regs);  in sfctemp_power_up()
68 	writel(0, sfctemp->regs);  in sfctemp_power_up()
72 	/* de-assert reset */  in sfctemp_power_up()
73 	writel(SFCTEMP_RSTN, sfctemp->regs);  in sfctemp_power_up()
79 	writel(SFCTEMP_PD, sfctemp->regs);  in sfctemp_power_down()
84 	writel(SFCTEMP_RSTN | SFCTEMP_RUN, sfctemp->regs);  in sfctemp_run()
90 	writel(SFCTEMP_RSTN, sfctemp->regs);  in sfctemp_stop()
97 	mutex_lock(&sfctemp->lock);  in sfctemp_enable()
98 	if (sfctemp->enabled)  in sfctemp_enable()
101 	ret = clk_prepare_enable(sfctemp->clk_bus);  in sfctemp_enable()
104 	ret = reset_control_deassert(sfctemp->rst_bus);  in sfctemp_enable()
108 	ret = clk_prepare_enable(sfctemp->clk_sense);  in sfctemp_enable()
111 	ret = reset_control_deassert(sfctemp->rst_sense);  in sfctemp_enable()
117 	sfctemp->enabled = true;  in sfctemp_enable()
119 	mutex_unlock(&sfctemp->lock);  in sfctemp_enable()
123 	clk_disable_unprepare(sfctemp->clk_sense);  in sfctemp_enable()
125 	reset_control_assert(sfctemp->rst_bus);  in sfctemp_enable()
127 	clk_disable_unprepare(sfctemp->clk_bus);  in sfctemp_enable()
129 	mutex_unlock(&sfctemp->lock);  in sfctemp_enable()
135 	mutex_lock(&sfctemp->lock);  in sfctemp_disable()
136 	if (!sfctemp->enabled)  in sfctemp_disable()
141 	reset_control_assert(sfctemp->rst_sense);  in sfctemp_disable()
142 	clk_disable_unprepare(sfctemp->clk_sense);  in sfctemp_disable()
143 	reset_control_assert(sfctemp->rst_bus);  in sfctemp_disable()
144 	clk_disable_unprepare(sfctemp->clk_bus);  in sfctemp_disable()
145 	sfctemp->enabled = false;  in sfctemp_disable()
147 	mutex_unlock(&sfctemp->lock);  in sfctemp_disable()
160 	mutex_lock(&sfctemp->lock);  in sfctemp_convert()
161 	if (!sfctemp->enabled) {  in sfctemp_convert()
162 		ret = -ENODATA;  in sfctemp_convert()
167 	*val = (long)((readl(sfctemp->regs) & SFCTEMP_DOUT_MSK) >> SFCTEMP_DOUT_POS)  in sfctemp_convert()
168 		* SFCTEMP_Y1000 / SFCTEMP_Z - SFCTEMP_K1000;  in sfctemp_convert()
172 	mutex_unlock(&sfctemp->lock);  in sfctemp_convert()
203 			*val = sfctemp->enabled;  in sfctemp_read()
208 			return -EINVAL;  in sfctemp_read()
211 		return -EINVAL;  in sfctemp_read()
228 			return -EINVAL;  in sfctemp_write()
230 			return -EINVAL;  in sfctemp_write()
233 		return -EINVAL;  in sfctemp_write()
256 	struct device *dev = &pdev->dev;  in sfctemp_probe()
263 		return -ENOMEM;  in sfctemp_probe()
266 	mutex_init(&sfctemp->lock);  in sfctemp_probe()
268 	sfctemp->regs = devm_platform_ioremap_resource(pdev, 0);  in sfctemp_probe()
269 	if (IS_ERR(sfctemp->regs))  in sfctemp_probe()
270 		return PTR_ERR(sfctemp->regs);  in sfctemp_probe()
272 	sfctemp->clk_sense = devm_clk_get(dev, "sense");  in sfctemp_probe()
273 	if (IS_ERR(sfctemp->clk_sense))  in sfctemp_probe()
274 		return dev_err_probe(dev, PTR_ERR(sfctemp->clk_sense),  in sfctemp_probe()
277 	sfctemp->clk_bus = devm_clk_get(dev, "bus");  in sfctemp_probe()
278 	if (IS_ERR(sfctemp->clk_bus))  in sfctemp_probe()
279 		return dev_err_probe(dev, PTR_ERR(sfctemp->clk_bus),  in sfctemp_probe()
282 	sfctemp->rst_sense = devm_reset_control_get_exclusive(dev, "sense");  in sfctemp_probe()
283 	if (IS_ERR(sfctemp->rst_sense))  in sfctemp_probe()
284 		return dev_err_probe(dev, PTR_ERR(sfctemp->rst_sense),  in sfctemp_probe()
287 	sfctemp->rst_bus = devm_reset_control_get_exclusive(dev, "bus");  in sfctemp_probe()
288 	if (IS_ERR(sfctemp->rst_bus))  in sfctemp_probe()
289 		return dev_err_probe(dev, PTR_ERR(sfctemp->rst_bus),  in sfctemp_probe()
292 	ret = reset_control_assert(sfctemp->rst_sense);  in sfctemp_probe()
296 	ret = reset_control_assert(sfctemp->rst_bus);  in sfctemp_probe()
314 	{ .compatible = "starfive,jh7100-temp" },
315 	{ .compatible = "starfive,jh7110-temp" },