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

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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: Viresh Kumar <[email protected]>
Cc: Dan Carpenter <[email protected]>
Reviewed-by: Vincenzo Frascino <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Viresh Kumar 2012-05-29 11:18:51 -07:00 • committed by Len Brown
commit b9c7aff481
4 changed files with 31 additions and 36 deletions
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1
drivers/thermal/Kconfig
View file

@ -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

26
drivers/thermal/spear_thermal.c
View file

@ -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),
},
};