linux-kernel - Re: [PATCH v4 5/5] power: supply: ds2760

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Date:   Fri, 6 Jul 2018 15:43:57 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.co.uk>
To:     Daniel Mack <daniel@...que.org>
Cc:     zbr@...emap.net, robh+dt@...nel.org, mark.rutland@....com,
        szabolcs.gyurko@....hu, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        robert.jarzmik@...e.fr
Subject: Re: [PATCH v4 5/5] power: supply: ds2760_battery: add devicetree
 probing

Hi,

On Fri, Jul 06, 2018 at 07:35:52AM +0200, Daniel Mack wrote:
> Add a matching table for devicetree probing, and optionally set the module
> parameter variables from DT properties.
> 
> Signed-off-by: Daniel Mack <daniel@...que.org>
> ---

Acked-for-power-supply: Sebastian Reichel <sebastian.reichel@...labora.co.uk>

-- Sebastian

>  drivers/power/supply/ds2760_battery.c | 29 ++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/ds2760_battery.c b/drivers/power/supply/ds2760_battery.c
> index aa406a7c65a1..11bed88a89fa 100644
> --- a/drivers/power/supply/ds2760_battery.c
> +++ b/drivers/power/supply/ds2760_battery.c
> @@ -29,6 +29,7 @@
>  #include <linux/power_supply.h>
>  #include <linux/suspend.h>
>  #include <linux/w1.h>
> +#include <linux/of.h>
>  
>  static unsigned int cache_time = 1000;
>  module_param(cache_time, uint, 0644);
> @@ -705,6 +706,24 @@ static int w1_ds2760_add_slave(struct w1_slave *sl)
>  
>  	psy_cfg.drv_data = di;
>  
> +	if (dev->of_node) {
> +		u32 tmp;
> +
> +		psy_cfg.of_node = dev->of_node;
> +
> +		if (!of_property_read_bool(dev->of_node, "maxim,pmod-enabled"))
> +			pmod_enabled = true;
> +
> +		if (!of_property_read_u32(dev->of_node,
> +					  "maxim,cache-time-ms", &tmp))
> +			cache_time = tmp;
> +
> +		if (!of_property_read_u32(dev->of_node,
> +					  "rated-capacity-microamp-hours",
> +					  &tmp))
> +			rated_capacity = tmp / 10; /* property is in mAh */
> +	}
> +
>  	di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
>  
>  	sl->family_data = di;
> @@ -719,7 +738,7 @@ static int w1_ds2760_add_slave(struct w1_slave *sl)
>  
>  	ds2760_battery_write_status(di, status);
>  
> -	/* set rated capacity from module param */
> +	/* set rated capacity from module param or device tree */
>  	if (rated_capacity)
>  		ds2760_battery_write_rated_capacity(di, rated_capacity);
>  
> @@ -769,6 +788,13 @@ static void w1_ds2760_remove_slave(struct w1_slave *sl)
>  	power_supply_unregister(di->bat);
>  }
>  
> +#ifdef CONFIG_OF
> +static const struct of_device_id w1_ds2760_of_ids[] = {
> +	{ .compatible = "maxim,ds2760" },
> +	{}
> +};
> +#endif
> +
>  static struct w1_family_ops w1_ds2760_fops = {
>  	.add_slave	= w1_ds2760_add_slave,
>  	.remove_slave	= w1_ds2760_remove_slave,
> @@ -778,6 +804,7 @@ static struct w1_family_ops w1_ds2760_fops = {
>  static struct w1_family w1_ds2760_family = {
>  	.fid		= W1_FAMILY_DS2760,
>  	.fops		= &w1_ds2760_fops,
> +	.of_match_table	= of_match_ptr(w1_ds2760_of_ids),
>  };
>  module_w1_family(w1_ds2760_family);
>  
> -- 
> 2.17.1
> 

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