Commit b9c7aff4 authored by Viresh Kumar's avatar Viresh Kumar Committed by Len Brown
Browse files

drivers/thermal/spear_thermal.c: add Device Tree probing capability 



SPEAr platforms now support DT and so must convert all drivers to support
DT.  This patch adds DT probing support for SPEAr thermal sensor driver
and updates its documentation too.

Also, as SPEAr is the only user of this driver and is only available with
DT, make this an only DT driver.  So, platform_data is completely removed
and passed via DT now.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@st.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: default avatarVincenzo Frascino <vincenzo.frascino@st.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 76e10d15

Documentation/devicetree/bindings/thermal/spear-thermal.txt

0 → 100644
+14 −0
Original line number Diff line number Diff line 
* SPEAr Thermal



Required properties:

- compatible : "st,thermal-spear1340"

- reg : Address range of the thermal registers

- st,thermal-flags: flags used to enable thermal sensor



Example:



	thermal@fc000000 {

		compatible = "st,thermal-spear1340";

		reg = <0xfc000000 0x1000>;

		st,thermal-flags = <0x7000>;

	};

drivers/thermal/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ config SPEAR_THERMAL 
	bool "SPEAr thermal sensor driver"

	depends on THERMAL

	depends on PLAT_SPEAR

	depends on OF

	help

	  Enable this to plug the SPEAr thermal sensor driver into the Linux

	  thermal framework

drivers/thermal/spear_thermal.c

+16 −10
Original line number Diff line number Diff line
@@ -20,9 +20,9 @@ 
#include <linux/err.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/of.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/platform_data/spear_thermal.h>

#include <linux/thermal.h>



#define MD_FACTOR	1000
@@ -103,21 +103,20 @@ static int spear_thermal_probe(struct platform_device *pdev) 
{

	struct thermal_zone_device *spear_thermal = NULL;

	struct spear_thermal_dev *stdev;

	struct spear_thermal_pdata *pdata;

	int ret = 0;

	struct device_node *np = pdev->dev.of_node;

	struct resource *stres = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	int ret = 0, val;



	if (!np || !of_property_read_u32(np, "st,thermal-flags", &val)) {

		dev_err(&pdev->dev, "Failed: DT Pdata not passed\n");

		return -EINVAL;

	}



	if (!stres) {

		dev_err(&pdev->dev, "memory resource missing\n");

		return -ENODEV;

	}



	pdata = dev_get_platdata(&pdev->dev);

	if (!pdata) {

		dev_err(&pdev->dev, "platform data is NULL\n");

		return -EINVAL;

	}



	stdev = devm_kzalloc(&pdev->dev, sizeof(*stdev), GFP_KERNEL);

	if (!stdev) {

		dev_err(&pdev->dev, "kzalloc fail\n");
@@ -144,7 +143,7 @@ static int spear_thermal_probe(struct platform_device *pdev) 
		goto put_clk;

	}



	stdev->flags = pdata->thermal_flags;

	stdev->flags = val;

	writel_relaxed(stdev->flags, stdev->thermal_base);



	spear_thermal = thermal_zone_device_register("spear_thermal", 0,
@@ -189,6 +188,12 @@ static int spear_thermal_exit(struct platform_device *pdev) 
	return 0;

}



static const struct of_device_id spear_thermal_id_table[] = {

	{ .compatible = "st,thermal-spear1340" },

	{}

};

MODULE_DEVICE_TABLE(of, spear_thermal_id_table);



static struct platform_driver spear_thermal_driver = {

	.probe = spear_thermal_probe,

	.remove = spear_thermal_exit,
@@ -196,6 +201,7 @@ static struct platform_driver spear_thermal_driver = { 
		.name = "spear_thermal",

		.owner = THIS_MODULE,

		.pm = &spear_thermal_pm_ops,

		.of_match_table = of_match_ptr(spear_thermal_id_table),

	},

};

include/linux/platform_data/spear_thermal.h

deleted100644 → 0
+0 −26
Original line number Diff line number Diff line 
/*

 * SPEAr thermal driver platform data.

 *

 * Copyright (C) 2011-2012 ST Microelectronics

 * Author: Vincenzo Frascino <vincenzo.frascino@st.com>

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#ifndef SPEAR_THERMAL_H

#define SPEAR_THERMAL_H



/* SPEAr Thermal Sensor Platform Data */

struct spear_thermal_pdata {

	/* flags used to enable thermal sensor */

	unsigned int thermal_flags;

};



#endif /* SPEAR_THERMAL_H */

CRA Git | Maintained and supported by SUSTech CRA and CCSE