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leds: ns2: convert to fwnode API 

Convert from OF api to fwnode API, so that it is possible to bind this
driver without device-tree.

The fwnode API does not expose a function to read a specific element of
an array. We therefore change the types of the ns2_led_modval structure
so that we can read the whole modval array with one fwnode call.

Signed-off-by: Marek Behún <kabel@kernel.org>
Tested-by: Simon Guinot <simon.guinot@sequanux.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Marek Behún 2020-09-26 22:11:30 +02:00 committed by Pavel Machek
parent 108f4664e3
commit 940cca1ab5
1 changed files with 26 additions and 29 deletions
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55
drivers/leds/leds-ns2.c
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@ -24,11 +24,16 @@ enum ns2_led_modes {
NS_V2_LED_SATA,
};
/*
* If the size of this structure or types of its members is changed,
* the filling of array modval in function ns2_led_register must be changed
* accordingly.
*/
struct ns2_led_modval {
enum ns2_led_modes mode;
int cmd_level;
int slow_level;
};
u32 mode;
u32 cmd_level;
u32 slow_level;
} __packed;
/*
* The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
@ -167,27 +172,28 @@ static struct attribute *ns2_led_attrs[] = {
};
ATTRIBUTE_GROUPS(ns2_led);
static int ns2_led_register(struct device *dev, struct device_node *np,
static int ns2_led_register(struct device *dev, struct fwnode_handle *node,
struct ns2_led *led)
{
struct led_init_data init_data = {};
struct ns2_led_modval *modval;
enum ns2_led_modes mode;
int nmodes, ret, i;
int nmodes, ret;
led->cmd = devm_gpiod_get_from_of_node(dev, np, "cmd-gpio", 0,
GPIOD_ASIS, np->name);
led->cmd = devm_fwnode_gpiod_get_index(dev, node, "cmd", 0, GPIOD_ASIS,
fwnode_get_name(node));
if (IS_ERR(led->cmd))
return PTR_ERR(led->cmd);
led->slow = devm_gpiod_get_from_of_node(dev, np, "slow-gpio", 0,
GPIOD_ASIS, np->name);
led->slow = devm_fwnode_gpiod_get_index(dev, node, "slow", 0,
GPIOD_ASIS,
fwnode_get_name(node));
if (IS_ERR(led->slow))
return PTR_ERR(led->slow);
ret = of_property_count_u32_elems(np, "modes-map");
ret = fwnode_property_count_u32(node, "modes-map");
if (ret < 0 || ret % 3) {
dev_err(dev, "Missing or malformed modes-map for %pOF\n", np);
dev_err(dev, "Missing or malformed modes-map for %pfw\n", node);
return -EINVAL;
}
@ -196,16 +202,8 @@ static int ns2_led_register(struct device *dev, struct device_node *np,
if (!modval)
return -ENOMEM;
for (i = 0; i < nmodes; i++) {
u32 val;
of_property_read_u32_index(np, "modes-map", 3 * i, &val);
modval[i].mode = val;
of_property_read_u32_index(np, "modes-map", 3 * i + 1, &val);
modval[i].cmd_level = val;
of_property_read_u32_index(np, "modes-map", 3 * i + 2, &val);
modval[i].slow_level = val;
}
fwnode_property_read_u32_array(node, "modes-map", (void *)modval,
nmodes * 3);
rwlock_init(&led->rw_lock);
@ -228,11 +226,11 @@ static int ns2_led_register(struct device *dev, struct device_node *np,
led->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
led->cdev.brightness = (mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;
init_data.fwnode = of_fwnode_handle(np);
init_data.fwnode = node;
ret = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
if (ret)
dev_err(dev, "Failed to register LED for node %pOF\n", np);
dev_err(dev, "Failed to register LED for node %pfw\n", node);
return ret;
}
@ -246,13 +244,12 @@ MODULE_DEVICE_TABLE(of, of_ns2_leds_match);
static int ns2_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np, *child;
struct fwnode_handle *child;
struct ns2_led *leds;
int count;
int ret;
np = dev_of_node(dev);
count = of_get_available_child_count(np);
count = device_get_child_node_count(dev);
if (!count)
return -ENODEV;
@ -260,10 +257,10 @@ static int ns2_led_probe(struct platform_device *pdev)
if (!leds)
return -ENOMEM;
for_each_available_child_of_node(np, child) {
device_for_each_child_node(dev, child) {
ret = ns2_led_register(dev, child, leds++);
if (ret) {
of_node_put(child);
fwnode_handle_put(child);
return ret;
}
}