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hwmon: (max6639) : Configure based on DT property

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Remove platform data & initialize with defaults
configuration & overwrite based on DT properties.

Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com>
Message-ID: <20241007090426.811736-1-naresh.solanki@9elements.com>
[groeck: Dropped some unnecessary empty lines]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Naresh Solanki 2024-10-07 14:34:24 +05:30 committed by Guenter Roeck
parent 79bc0af904
commit 7506ebcd66
2 changed files with 60 additions and 38 deletions
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83
drivers/hwmon/max6639.c
View File

@ -19,7 +19,6 @@
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/platform_data/max6639.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
@ -531,14 +530,49 @@ static int rpm_range_to_reg(int range)
return 1; /* default: 4000 RPM */
}
static int max6639_probe_child_from_dt(struct i2c_client *client,
struct device_node *child,
struct max6639_data *data)
{
struct device *dev = &client->dev;
u32 i;
int err, val;
err = of_property_read_u32(child, "reg", &i);
if (err) {
dev_err(dev, "missing reg property of %pOFn\n", child);
return err;
}
if (i > 1) {
dev_err(dev, "Invalid fan index reg %d\n", i);
return -EINVAL;
}
err = of_property_read_u32(child, "pulses-per-revolution", &val);
if (!err) {
if (val < 1 || val > 5) {
dev_err(dev, "invalid pulses-per-revolution %d of %pOFn\n", val, child);
return -EINVAL;
}
data->ppr[i] = val;
}
err = of_property_read_u32(child, "max-rpm", &val);
if (!err)
data->rpm_range[i] = rpm_range_to_reg(val);
return 0;
}
static int max6639_init_client(struct i2c_client *client,
struct max6639_data *data)
{
struct max6639_platform_data *max6639_info =
dev_get_platdata(&client->dev);
int i;
int rpm_range = 1; /* default: 4000 RPM */
int err, ppr;
struct device *dev = &client->dev;
const struct device_node *np = dev->of_node;
struct device_node *child;
int i, err;
/* Reset chip to default values, see below for GCONFIG setup */
err = regmap_write(data->regmap, MAX6639_REG_GCONFIG, MAX6639_GCONFIG_POR);
@ -546,21 +580,29 @@ static int max6639_init_client(struct i2c_client *client,
return err;
/* Fans pulse per revolution is 2 by default */
if (max6639_info && max6639_info->ppr > 0 &&
max6639_info->ppr < 5)
ppr = max6639_info->ppr;
else
ppr = 2;
data->ppr[0] = 2;
data->ppr[1] = 2;
data->ppr[0] = ppr;
data->ppr[1] = ppr;
/* default: 4000 RPM */
data->rpm_range[0] = 1;
data->rpm_range[1] = 1;
if (max6639_info)
rpm_range = rpm_range_to_reg(max6639_info->rpm_range);
data->rpm_range[0] = rpm_range;
data->rpm_range[1] = rpm_range;
for_each_child_of_node(np, child) {
if (strcmp(child->name, "fan"))
continue;
err = max6639_probe_child_from_dt(client, child, data);
if (err) {
of_node_put(child);
return err;
}
}
for (i = 0; i < MAX6639_NUM_CHANNELS; i++) {
err = regmap_set_bits(data->regmap, MAX6639_REG_OUTPUT_MASK, BIT(1 - i));
if (err)
return err;
/* Set Fan pulse per revolution */
err = max6639_set_ppr(data, i, data->ppr[i]);
if (err)
@ -573,12 +615,7 @@ static int max6639_init_client(struct i2c_client *client,
return err;
/* Fans PWM polarity high by default */
if (max6639_info) {
if (max6639_info->pwm_polarity == 0)
err = regmap_write(data->regmap, MAX6639_REG_FAN_CONFIG2a(i), 0x00);
else
err = regmap_write(data->regmap, MAX6639_REG_FAN_CONFIG2a(i), 0x02);
}
err = regmap_write(data->regmap, MAX6639_REG_FAN_CONFIG2a(i), 0x00);
if (err)
return err;

15
include/linux/platform_data/max6639.h
View File

@ -1,15 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_MAX6639_H
#define _LINUX_MAX6639_H
#include <linux/types.h>
/* platform data for the MAX6639 temperature sensor and fan control */
struct max6639_platform_data {
bool pwm_polarity; /* Polarity low (0) or high (1, default) */
int ppr; /* Pulses per rotation 1..4 (default == 2) */
int rpm_range; /* 2000, 4000 (default), 8000 or 16000 */
};
#endif /* _LINUX_MAX6639_H */