Initial commit

target/linux/generic/backport-6.6/810-v6.11-hwmon-g672-add-support-for-g761.patch

@@ -0,0 +1,106 @@
+From 6ce402327a6fb714a9f40a0bb59bcbfe383839a5 Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Tue, 4 Jun 2024 18:43:43 +0200
+Subject: [PATCH] hwmon: g672: add support for g761
+
+Add support for g761 PWM Fan Controller.
+
+The g761 is a copy of the g763 with the only difference of supporting
+and internal clock. The internal clock is used if no clocks property is
+defined in device node and in such case the required bit is enabled and
+clock handling is skipped.
+
+The internal clock oscillator runs at 31KHz.
+
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+Link: https://lore.kernel.org/r/20240604164348.542-3-ansuelsmth@gmail.com
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+---
+ drivers/hwmon/g762.c | 33 ++++++++++++++++++++++++++++++---
+ 1 file changed, 30 insertions(+), 3 deletions(-)
+
+--- a/drivers/hwmon/g762.c
++++ b/drivers/hwmon/g762.c
+@@ -69,6 +69,7 @@ enum g762_regs {
+ #define G762_REG_FAN_CMD1_PWM_POLARITY  0x02 /* PWM polarity */
+ #define G762_REG_FAN_CMD1_PULSE_PER_REV 0x01 /* pulse per fan revolution */
+ 
++#define G761_REG_FAN_CMD2_FAN_CLOCK     0x20 /* choose internal clock*/
+ #define G762_REG_FAN_CMD2_GEAR_MODE_1   0x08 /* fan gear mode */
+ #define G762_REG_FAN_CMD2_GEAR_MODE_0   0x04
+ #define G762_REG_FAN_CMD2_FAN_STARTV_1  0x02 /* fan startup voltage */
+@@ -115,6 +116,7 @@ enum g762_regs {
+ 
+ struct g762_data {
+ 	struct i2c_client *client;
++	bool internal_clock;
+ 	struct clk *clk;
+ 
+ 	/* update mutex */
+@@ -566,6 +568,7 @@ static int do_set_fan_startv(struct devi
+ 
+ #ifdef CONFIG_OF
+ static const struct of_device_id g762_dt_match[] = {
++	{ .compatible = "gmt,g761" },
+ 	{ .compatible = "gmt,g762" },
+ 	{ .compatible = "gmt,g763" },
+ 	{ },
+@@ -597,6 +600,21 @@ static int g762_of_clock_enable(struct i
+ 	if (!client->dev.of_node)
+ 		return 0;
+ 
++	data = i2c_get_clientdata(client);
++
++	/*
++	 * Skip CLK detection and handling if we use internal clock.
++	 * This is only valid for g761.
++	 */
++	data->internal_clock = of_device_is_compatible(client->dev.of_node,
++						       "gmt,g761") &&
++			       !of_property_present(client->dev.of_node,
++						    "clocks");
++	if (data->internal_clock) {
++		do_set_clk_freq(&client->dev, 32768);
++		return 0;
++	}
++
+ 	clk = of_clk_get(client->dev.of_node, 0);
+ 	if (IS_ERR(clk)) {
+ 		dev_err(&client->dev, "failed to get clock\n");
+@@ -616,7 +634,6 @@ static int g762_of_clock_enable(struct i
+ 		goto clk_unprep;
+ 	}
+ 
+-	data = i2c_get_clientdata(client);
+ 	data->clk = clk;
+ 
+ 	ret = devm_add_action(&client->dev, g762_of_clock_disable, data);
+@@ -1025,16 +1042,26 @@ ATTRIBUTE_GROUPS(g762);
+ static inline int g762_fan_init(struct device *dev)
+ {
+ 	struct g762_data *data = g762_update_client(dev);
++	int ret;
+ 
+ 	if (IS_ERR(data))
+ 		return PTR_ERR(data);
+ 
++	/* internal_clock can only be set with compatible g761 */
++	if (data->internal_clock)
++		data->fan_cmd2 |= G761_REG_FAN_CMD2_FAN_CLOCK;
++
+ 	data->fan_cmd1 |= G762_REG_FAN_CMD1_DET_FAN_FAIL;
+ 	data->fan_cmd1 |= G762_REG_FAN_CMD1_DET_FAN_OOC;
+ 	data->valid = false;
+ 
+-	return i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1,
+-					 data->fan_cmd1);
++	ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1,
++					data->fan_cmd1);
++	if (ret)
++		return ret;
++
++	return i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD2,
++					 data->fan_cmd2);
+ }
+ 
+ static int g762_probe(struct i2c_client *client)