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leds: pca963x: Make use of device property API

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Make use of device property API in this driver so that both OF based
system and ACPI based system can use this driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
This commit is contained in:
Andy Shevchenko 2019-03-25 16:02:07 +02:00 committed by Jacek Anaszewski
parent 967f69de81
commit 0b6034d84b
1 changed files with 21 additions and 23 deletions
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44
drivers/leds/leds-pca963x.c
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@ -32,6 +32,7 @@
#include <linux/leds.h> #include <linux/leds.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/property.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/platform_data/leds-pca963x.h> #include <linux/platform_data/leds-pca963x.h>
@ -277,16 +278,15 @@ static int pca963x_blink_set(struct led_classdev *led_cdev,
return 0; return 0;
} }
#if IS_ENABLED(CONFIG_OF)
static struct pca963x_platform_data * static struct pca963x_platform_data *
pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip) pca963x_get_pdata(struct i2c_client *client, struct pca963x_chipdef *chip)
{ {
struct device_node *np = client->dev.of_node, *child;
struct pca963x_platform_data *pdata; struct pca963x_platform_data *pdata;
struct led_info *pca963x_leds; struct led_info *pca963x_leds;
struct fwnode_handle *child;
int count; int count;
count = of_get_child_count(np); count = device_get_child_node_count(&client->dev);
if (!count || count > chip->n_leds) if (!count || count > chip->n_leds)
return ERR_PTR(-ENODEV); return ERR_PTR(-ENODEV);
@ -295,18 +295,22 @@ pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
if (!pca963x_leds) if (!pca963x_leds)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
for_each_child_of_node(np, child) { device_for_each_child_node(&client->dev, child) {
struct led_info led = {}; struct led_info led = {};
u32 reg; u32 reg;
int res; int res;
res = of_property_read_u32(child, "reg", &reg); res = fwnode_property_read_u32(child, "reg", &reg);
if ((res != 0) || (reg >= chip->n_leds)) if ((res != 0) || (reg >= chip->n_leds))
continue; continue;
led.name =
of_get_property(child, "label", NULL) ? : child->name; res = fwnode_property_read_string(child, "label", &led.name);
led.default_trigger = if ((res != 0) && is_of_node(child))
of_get_property(child, "linux,default-trigger", NULL); led.name = to_of_node(child)->name;
fwnode_property_read_string(child, "linux,default-trigger",
&led.default_trigger);
pca963x_leds[reg] = led; pca963x_leds[reg] = led;
} }
pdata = devm_kzalloc(&client->dev, pdata = devm_kzalloc(&client->dev,
@ -318,22 +322,23 @@ pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
pdata->leds.num_leds = chip->n_leds; pdata->leds.num_leds = chip->n_leds;
/* default to open-drain unless totem pole (push-pull) is specified */ /* default to open-drain unless totem pole (push-pull) is specified */
if (of_property_read_bool(np, "nxp,totem-pole")) if (device_property_read_bool(&client->dev, "nxp,totem-pole"))
pdata->outdrv = PCA963X_TOTEM_POLE; pdata->outdrv = PCA963X_TOTEM_POLE;
else else
pdata->outdrv = PCA963X_OPEN_DRAIN; pdata->outdrv = PCA963X_OPEN_DRAIN;
/* default to software blinking unless hardware blinking is specified */ /* default to software blinking unless hardware blinking is specified */
if (of_property_read_bool(np, "nxp,hw-blink")) if (device_property_read_bool(&client->dev, "nxp,hw-blink"))
pdata->blink_type = PCA963X_HW_BLINK; pdata->blink_type = PCA963X_HW_BLINK;
else else
pdata->blink_type = PCA963X_SW_BLINK; pdata->blink_type = PCA963X_SW_BLINK;
if (of_property_read_u32(np, "nxp,period-scale", &chip->scaling)) if (device_property_read_u32(&client->dev, "nxp,period-scale",
&chip->scaling))
chip->scaling = 1000; chip->scaling = 1000;
/* default to non-inverted output, unless inverted is specified */ /* default to non-inverted output, unless inverted is specified */
if (of_property_read_bool(np, "nxp,inverted-out")) if (device_property_read_bool(&client->dev, "nxp,inverted-out"))
pdata->dir = PCA963X_INVERTED; pdata->dir = PCA963X_INVERTED;
else else
pdata->dir = PCA963X_NORMAL; pdata->dir = PCA963X_NORMAL;
@ -349,13 +354,6 @@ static const struct of_device_id of_pca963x_match[] = {
{}, {},
}; };
MODULE_DEVICE_TABLE(of, of_pca963x_match); MODULE_DEVICE_TABLE(of, of_pca963x_match);
#else
static struct pca963x_platform_data *
pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
{
return ERR_PTR(-ENODEV);
}
#endif
static int pca963x_probe(struct i2c_client *client, static int pca963x_probe(struct i2c_client *client,
const struct i2c_device_id *id) const struct i2c_device_id *id)
@ -370,7 +368,7 @@ static int pca963x_probe(struct i2c_client *client,
pdata = dev_get_platdata(&client->dev); pdata = dev_get_platdata(&client->dev);
if (!pdata) { if (!pdata) {
pdata = pca963x_dt_init(client, chip); pdata = pca963x_get_pdata(client, chip);
if (IS_ERR(pdata)) { if (IS_ERR(pdata)) {
dev_warn(&client->dev, "could not parse configuration\n"); dev_warn(&client->dev, "could not parse configuration\n");
pdata = NULL; pdata = NULL;
@ -476,7 +474,7 @@ static int pca963x_remove(struct i2c_client *client)
static struct i2c_driver pca963x_driver = { static struct i2c_driver pca963x_driver = {
.driver = { .driver = {
.name = "leds-pca963x", .name = "leds-pca963x",
.of_match_table = of_match_ptr(of_pca963x_match), .of_match_table = of_pca963x_match,
}, },
.probe = pca963x_probe, .probe = pca963x_probe,
.remove = pca963x_remove, .remove = pca963x_remove,