linux-kernel - Re: [PATCH v1 3/3] hwmon: (pmbus/mp2975) Use i2c_get_match

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Message-ID: <f874c321-16b9-43f6-95c3-c94b7c9d3cb6@roeck-us.net>
Date: Mon, 25 Mar 2024 09:31:08 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Patrick Rudolph <patrick.rudolph@...ements.com>,
	linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jean Delvare <jdelvare@...e.com>
Subject: Re: [PATCH v1 3/3] hwmon: (pmbus/mp2975) Use i2c_get_match_data()

On Mon, Mar 25, 2024 at 02:07:44PM +0200, Andy Shevchenko wrote:
> Use preferred i2c_get_match_data() instead of of_device_get_match_data()
> to get the driver match data. With this, adjust the includes to explicitly
> include the correct headers.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Appied, with additional change noted below.

> ---
>  drivers/hwmon/pmbus/mp2975.c | 54 +++++++++++++++++++++---------------
>  1 file changed, 32 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/hwmon/pmbus/mp2975.c b/drivers/hwmon/pmbus/mp2975.c
> index bc7558dc87ee..79b4ea325cb2 100644
> --- a/drivers/hwmon/pmbus/mp2975.c
> +++ b/drivers/hwmon/pmbus/mp2975.c
> @@ -10,8 +10,9 @@
>  #include <linux/i2c.h>
>  #include <linux/init.h>
>  #include <linux/kernel.h>
> +#include <linux/mod_devicetable.h>
>  #include <linux/module.h>
> -#include <linux/of_device.h>
> +
>  #include "pmbus.h"
>  
>  /* Vendor specific registers. */
> @@ -98,6 +99,11 @@ static const int mp2975_max_phases[][MP2975_PAGE_NUM] = {
>  	[mp2971] = { MP2971_MAX_PHASE_RAIL1, MP2971_MAX_PHASE_RAIL2 },
>  };
>  
> +struct mp2975_driver_info {
> +	const struct pmbus_driver_info *info;
> +	enum chips chip_id;
> +};
> +
>  struct mp2975_data {
>  	struct pmbus_driver_info info;
>  	enum chips chip_id;
> @@ -111,15 +117,6 @@ struct mp2975_data {
>  	int curr_sense_gain[MP2975_PAGE_NUM];
>  };
>  
> -static const struct i2c_device_id mp2975_id[] = {
> -	{"mp2971", mp2971},
> -	{"mp2973", mp2973},
> -	{"mp2975", mp2975},
> -	{}
> -};
> -
> -MODULE_DEVICE_TABLE(i2c, mp2975_id);
> -
>  static const struct regulator_desc __maybe_unused mp2975_reg_desc[] = {
>  	PMBUS_REGULATOR("vout", 0),
>  	PMBUS_REGULATOR("vout", 1),
> @@ -989,29 +986,34 @@ static const struct pmbus_driver_info mp2973_info = {
>  #endif
>  };
>  
> +static const struct mp2975_driver_info mp2975_ddinfo[] = {
> +	[mp2975] = { .info = &mp2975_info, .chip_id = mp2975 },
> +	[mp2973] = { .info = &mp2973_info, .chip_id = mp2973 },
> +	[mp2971] = { .info = &mp2973_info, .chip_id = mp2971 },
> +};
> +
>  static int mp2975_probe(struct i2c_client *client)
>  {
> +	const struct mp2975_driver_info *ddinfo;
>  	struct pmbus_driver_info *info;
>  	struct mp2975_data *data;
>  	int ret;
>  
> +	ddinfo = i2c_get_match_data(client);
> +	if (!ddinfo)
> +		return -ENODEV;
> +
>  	data = devm_kzalloc(&client->dev, sizeof(struct mp2975_data),
>  			    GFP_KERNEL);
>  	if (!data)
>  		return -ENOMEM;
>  
> -	if (client->dev.of_node)
> -		data->chip_id = (enum chips)(unsigned long)of_device_get_match_data(&client->dev);
> -	else
> -		data->chip_id = i2c_match_id(mp2975_id, client)->driver_data;
> +	data->chip_id = ddinfo->chip_id;
>  
>  	memcpy(data->max_phases, mp2975_max_phases[data->chip_id],
>  	       sizeof(data->max_phases));
>  
> -	if (data->chip_id == mp2975)
> -		memcpy(&data->info, &mp2975_info, sizeof(*info));
> -	else
> -		memcpy(&data->info, &mp2973_info, sizeof(*info));
> +	memcpy(&data->info, ddinfo->info, sizeof(data->info));
>  
>  	info = &data->info;
>  
> @@ -1070,17 +1072,25 @@ static int mp2975_probe(struct i2c_client *client)
>  }
>  
>  static const struct of_device_id __maybe_unused mp2975_of_match[] = {

This is no longer __maybe_unused.

Thanks,
Guenter

> -	{.compatible = "mps,mp2971", .data = (void *)mp2971},
> -	{.compatible = "mps,mp2973", .data = (void *)mp2973},
> -	{.compatible = "mps,mp2975", .data = (void *)mp2975},
> +	{.compatible = "mps,mp2971", .data = &mp2975_ddinfo[mp2971]},
> +	{.compatible = "mps,mp2973", .data = &mp2975_ddinfo[mp2973]},
> +	{.compatible = "mps,mp2975", .data = &mp2975_ddinfo[mp2975]},
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, mp2975_of_match);
>  
> +static const struct i2c_device_id mp2975_id[] = {
> +	{"mp2971", (kernel_ulong_t)&mp2975_ddinfo[mp2971]},
> +	{"mp2973", (kernel_ulong_t)&mp2975_ddinfo[mp2973]},
> +	{"mp2975", (kernel_ulong_t)&mp2975_ddinfo[mp2975]},
> +	{}
> +};
> +MODULE_DEVICE_TABLE(i2c, mp2975_id);
> +
>  static struct i2c_driver mp2975_driver = {
>  	.driver = {
>  		.name = "mp2975",
> -		.of_match_table = of_match_ptr(mp2975_of_match),
> +		.of_match_table = mp2975_of_match,
>  	},
>  	.probe = mp2975_probe,
>  	.id_table = mp2975_id,