linux-kernel - Re: [PATCH v1 25/33] ata/drivers/ahci

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Date:   Mon, 11 Jul 2022 08:18:56 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     Daniel Lezcano <daniel.lezcano@...exp.org>,
        daniel.lezcano@...aro.org, rafael@...nel.org
Cc:     rui.zhang@...el.com, khilman@...libre.com, abailon@...libre.com,
        amitk@...nel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" 
        <linux-ide@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v1 25/33] ata/drivers/ahci_imx: Switch to new of thermal
 API

On 7/11/22 06:24, Daniel Lezcano wrote:
> The thermal OF code has a new API allowing to migrate the OF
> initialization to a simpler approach.
> 
> Use this new API.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...exp.org>
> ---
>  drivers/ata/ahci_imx.c | 15 ++++++++++-----
>  1 file changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
> index 79aa9f285312..5ad9a890e71a 100644
> --- a/drivers/ata/ahci_imx.c
> +++ b/drivers/ata/ahci_imx.c
> @@ -327,7 +327,7 @@ static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio)
>  }
>  
>  /* SATA AHCI temperature monitor */
> -static int sata_ahci_read_temperature(void *dev, int *temp)
> +static int __sata_ahci_read_temperature(void *dev, int *temp)
>  {
>  	u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum;
>  	u32 str1, str2, str3, str4;
> @@ -416,6 +416,11 @@ static int sata_ahci_read_temperature(void *dev, int *temp)
>  	return 0;
>  }
>  
> +static int sata_ahci_read_temperature(struct thermal_zone_device *tz, int *temp)
> +{
> +	return __sata_ahci_read_temperature(tz->devdata, temp);
> +}
> +
>  static ssize_t sata_ahci_show_temp(struct device *dev,
>  				   struct device_attribute *da,
>  				   char *buf)
> @@ -423,14 +428,14 @@ static ssize_t sata_ahci_show_temp(struct device *dev,
>  	unsigned int temp = 0;
>  	int err;
>  
> -	err = sata_ahci_read_temperature(dev, &temp);
> +	err = __sata_ahci_read_temperature(dev, &temp);
>  	if (err < 0)
>  		return err;
>  
>  	return sprintf(buf, "%u\n", temp);
>  }

I do not see why the above changes are necessary. Please explain.

>  
> -static const struct thermal_zone_of_device_ops fsl_sata_ahci_of_thermal_ops = {
> +static struct thermal_zone_device_ops fsl_sata_ahci_of_thermal_ops = {

Why remove the const ?

>  	.get_temp = sata_ahci_read_temperature,
>  };
>  
> @@ -1131,8 +1136,8 @@ static int imx_ahci_probe(struct platform_device *pdev)
>  			ret = PTR_ERR(hwmon_dev);
>  			goto disable_clk;
>  		}
> -		devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
> -					     &fsl_sata_ahci_of_thermal_ops);
> +		devm_thermal_of_zone_register(hwmon_dev, 0, hwmon_dev,
> +					      &fsl_sata_ahci_of_thermal_ops);

This is the only change that seems necessary.

>  		dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev));
>  	}
>  

And it is hard to review a patch without the full series for context.
Please send all patches next time.


-- 
Damien Le Moal
Western Digital Research