linux-kernel - Re: [RFC PATCH 2/5] power: generic-adc-battery: Parse more properties from DT

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Date:   Tue, 29 Aug 2017 11:45:52 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.co.uk>
To:     Marek Belisko <marek.belisko@...n-nandra.com>
Cc:     robh+dt@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, hns@...delico.com, pavel@....cz,
        Marek Belisko <marek.belisko@...il.com>
Subject: Re: [RFC PATCH 2/5] power: generic-adc-battery: Parse more
 properties from DT

Hi,

On Tue, Aug 01, 2017 at 10:55:23PM +0200, Marek Belisko wrote:
> From: Marek Belisko <marek.belisko@...il.com>
> 
> Signed-off-by: Marek Belisko <marek.belisko@...il.com>

This should use the infrastructure described here:

Documentation/devicetree/bindings/power/supply/battery.txt

-- Sebastian

> ---
>  drivers/power/supply/generic-adc-battery.c | 68 ++++++++++++++++++++++++++++++
>  1 file changed, 68 insertions(+)
> 
> diff --git a/drivers/power/supply/generic-adc-battery.c b/drivers/power/supply/generic-adc-battery.c
> index b5e9208..d4daa6a 100644
> --- a/drivers/power/supply/generic-adc-battery.c
> +++ b/drivers/power/supply/generic-adc-battery.c
> @@ -23,6 +23,7 @@
>  #include <linux/iio/consumer.h>
>  #include <linux/iio/types.h>
>  #include <linux/power/generic-adc-battery.h>
> +#include <linux/of_gpio.h>
>  
>  #define JITTER_DEFAULT 10 /* hope 10ms is enough */
>  
> @@ -241,6 +242,69 @@ static irqreturn_t gab_charged(int irq, void *dev_id)
>  	return IRQ_HANDLED;
>  }
>  
> +#ifdef CONFIG_OF
> +static struct gab_platform_data *gab_dt_probe(struct platform_device *pdev)
> +{
> +	struct gab_platform_data *pdata;
> +	struct device_node *np = pdev->dev.of_node;
> +	const char *name;
> +	u32 val;
> +	int err;
> +
> +	pdata = devm_kzalloc(&pdev->dev,
> +			sizeof(struct gab_platform_data),
> +			GFP_KERNEL);
> +	if (!pdata)
> +		return ERR_PTR(-ENOMEM);
> +
> +	pdata->gpio_charge_finished  = of_get_gpio(np, 0);
> +
> +	/* parse and fill power_supply_info struct */
> +	err = of_property_read_u32(np, "technology", &val);
> +	if (err) {
> +		dev_info(&pdev->dev, "Battery technology unknown\n");
> +		val = 0;
> +	}
> +	pdata->battery_info.technology = val;
> +
> +	err = of_property_read_string(np, "battery-name", &name);
> +	if (err) {
> +		dev_info(&pdev->dev, "Battery name empty, setting default\n");
> +	}
> +	pdata->battery_info.name = name;
> +
> +	val = 0;
> +	err = of_property_read_u32(np, "charge_empty_design", &val);
> +	pdata->battery_info.charge_empty_design = val;
> +
> +	val = 0;
> +	err = of_property_read_u32(np, "charge_full_design", &val);
> +	pdata->battery_info.charge_full_design = val;
> +
> +	val = 0;
> +	err = of_property_read_u32(np, "voltage_min_design", &val);
> +	pdata->battery_info.voltage_min_design = val;
> +
> +	val = 0;
> +	err = of_property_read_u32(np, "voltage_max-design", &val);
> +	pdata->battery_info.voltage_max_design = val;
> +
> +	return pdata;
> +}
> +
> +static const struct of_device_id of_gab_match[] = {
> +	{ .compatible = "linux,generic-adc-battery", },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, of_gab_match);
> +
> +#else
> +static struct gab_platform_data gab_dt_probe(struct platform_device *pdev)
> +{
> +	ERR_PTR(-ENODEV);
> +}
> +#endif
> +
>  static int gab_probe(struct platform_device *pdev)
>  {
>  	struct gab *adc_bat;
> @@ -258,6 +322,9 @@ static int gab_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  	}
>  
> +	if (pdata == NULL)
> +		pdata = gab_dt_probe(pdev);
> +
>  	psy_cfg.drv_data = adc_bat;
>  	psy_desc = &adc_bat->psy_desc;
>  	psy_desc->name = "generic-adc-batt";//pdata->battery_info.name;
> @@ -418,6 +485,7 @@ static struct platform_driver gab_driver = {
>  	.driver		= {
>  		.name	= "generic-adc-battery",
>  		.pm	= &gab_pm_ops,
> +		.of_match_table = of_gab_match,
>  	},
>  	.probe		= gab_probe,
>  	.remove		= gab_remove,
> -- 
> 2.7.4
> 

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