Commit 734b5def authored by Binbin Zhou's avatar Binbin Zhou Committed by Daniel Lezcano
Browse files

thermal/drivers/loongson2: Add Loongson-2K2000 support 



The Loongson-2K2000 and Loongson-2K1000 have similar thermal sensors,
except that the temperature is read differently.

In particular, the temperature output registers of the Loongson-2K2000
are defined in the chip configuration domain and are read in a different
way.

Signed-off-by: default avatarBinbin Zhou <zhoubinbin@loongson.cn>
Acked-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/fdbfdcc3231a36a4ee0bcf1377ddcbd6f8c944b5.1713837379.git.zhoubinbin@loongson.cn
parent c8c43536

drivers/thermal/loongson2_thermal.c

+51 −13
Original line number Diff line number Diff line
@@ -30,12 +30,20 @@ 
					 LOONGSON2_THSENS_INT_HIGH)

#define LOONGSON2_THSENS_OUT_MASK	0xFF



/*

 * This flag is used to indicate the temperature reading

 * method of the Loongson-2K2000

 */

#define LS2K2000_THSENS_OUT_FLAG	BIT(0)



struct loongson2_thermal_chip_data {

	unsigned int thermal_sensor_sel;

	unsigned int flags;

};



struct loongson2_thermal_data {

	void __iomem *regs;

	void __iomem *ctrl_reg;

	void __iomem *temp_reg;

	const struct loongson2_thermal_chip_data *chip_data;

};
@@ -48,7 +56,7 @@ static void loongson2_set_ctrl_regs(struct loongson2_thermal_data *data, 


	reg_ctrl = ctrl_data + HECTO;

	reg_ctrl |= enable ? 0x100 : 0;

	writew(reg_ctrl, data->regs + ctrl_reg + reg_off);

	writew(reg_ctrl, data->ctrl_reg + ctrl_reg + reg_off);

}



static int loongson2_thermal_set(struct loongson2_thermal_data *data,
@@ -63,13 +71,24 @@ static int loongson2_thermal_set(struct loongson2_thermal_data *data, 
	return 0;

}



static int loongson2_thermal_get_temp(struct thermal_zone_device *tz, int *temp)

static int loongson2_2k1000_get_temp(struct thermal_zone_device *tz, int *temp)

{

	int val;

	struct loongson2_thermal_data *data = thermal_zone_device_priv(tz);



	val = readl(data->ctrl_reg + LOONGSON2_THSENS_OUT_REG);

	*temp = ((val & LOONGSON2_THSENS_OUT_MASK) - HECTO) * KILO;



	return 0;

}



static int loongson2_2k2000_get_temp(struct thermal_zone_device *tz, int *temp)

{

	u32 reg_val;

	int val;

	struct loongson2_thermal_data *data = thermal_zone_device_priv(tz);



	reg_val = readl(data->regs + LOONGSON2_THSENS_OUT_REG);

	*temp = ((reg_val & LOONGSON2_THSENS_OUT_MASK) - HECTO) * KILO;

	val = readl(data->temp_reg);

	*temp = ((val & 0xffff) * 820 / 0x4000 - 311) * KILO;



	return 0;

}
@@ -79,7 +98,7 @@ static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) 
	struct thermal_zone_device *tzd = dev;

	struct loongson2_thermal_data *data = thermal_zone_device_priv(tzd);



	writeb(LOONGSON2_THSENS_INT_EN, data->regs + LOONGSON2_THSENS_STATUS_REG);

	writeb(LOONGSON2_THSENS_INT_EN, data->ctrl_reg + LOONGSON2_THSENS_STATUS_REG);



	thermal_zone_device_update(tzd, THERMAL_EVENT_UNSPECIFIED);
@@ -93,8 +112,8 @@ static int loongson2_thermal_set_trips(struct thermal_zone_device *tz, int low, 
	return loongson2_thermal_set(data, low/MILLI, high/MILLI, true);

}



static const struct thermal_zone_device_ops loongson2_of_thermal_ops = {

	.get_temp = loongson2_thermal_get_temp,

static struct thermal_zone_device_ops loongson2_of_thermal_ops = {

	.get_temp = loongson2_2k1000_get_temp,

	.set_trips = loongson2_thermal_set_trips,

};
@@ -111,15 +130,24 @@ static int loongson2_thermal_probe(struct platform_device *pdev) 


	data->chip_data = device_get_match_data(dev);



	data->regs = devm_platform_ioremap_resource(pdev, 0);

	if (IS_ERR(data->regs))

		return PTR_ERR(data->regs);

	data->ctrl_reg = devm_platform_ioremap_resource(pdev, 0);

	if (IS_ERR(data->ctrl_reg))

		return PTR_ERR(data->ctrl_reg);



	/* The temperature output register is separate for Loongson-2K2000 */

	if (data->chip_data->flags & LS2K2000_THSENS_OUT_FLAG) {

		data->temp_reg = devm_platform_ioremap_resource(pdev, 1);

		if (IS_ERR(data->temp_reg))

			return PTR_ERR(data->temp_reg);



		loongson2_of_thermal_ops.get_temp = loongson2_2k2000_get_temp;

	}



	irq = platform_get_irq(pdev, 0);

	if (irq < 0)

		return irq;



	writeb(LOONGSON2_THSENS_INT_EN, data->regs + LOONGSON2_THSENS_STATUS_REG);

	writeb(LOONGSON2_THSENS_INT_EN, data->ctrl_reg + LOONGSON2_THSENS_STATUS_REG);



	loongson2_thermal_set(data, 0, 0, false);
@@ -148,6 +176,12 @@ static int loongson2_thermal_probe(struct platform_device *pdev) 


static const struct loongson2_thermal_chip_data loongson2_thermal_ls2k1000_data = {

	.thermal_sensor_sel = 0,

	.flags = 0,

};



static const struct loongson2_thermal_chip_data loongson2_thermal_ls2k2000_data = {

	.thermal_sensor_sel = 0,

	.flags = LS2K2000_THSENS_OUT_FLAG,

};



static const struct of_device_id of_loongson2_thermal_match[] = {
@@ -155,6 +189,10 @@ static const struct of_device_id of_loongson2_thermal_match[] = { 
		.compatible = "loongson,ls2k1000-thermal",

		.data = &loongson2_thermal_ls2k1000_data,

	},

	{

		.compatible = "loongson,ls2k2000-thermal",

		.data = &loongson2_thermal_ls2k2000_data,

	},

	{ /* end */ }

};

MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match);