Re: [PATCH v1 25/33] ata/drivers/ahci_imx: Switch to new of thermal API

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On 11/07/2022 01:18, Damien Le Moal wrote:
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@xxxxxxxxxx>
---
  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.

sata_ahci_read_temperature() is used by sata_ahci_show_temp() also.

So in order to change the function prototype for the get_temp ops which does not take a void* but a thermal_zone_device* structure, this function wraps the call.

Do you prefer sata_ahci_read_temperature() becomes sata_ahci_get_temp() and keep __sata_ahci_read_temperature() name untouched ?

-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.




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