leds: leds-mc13783: Add devicetree support
This patch adds devicetree support for the MC13XXX LED driver. (cooloney@gmail.com: remove unneeded semicolon) Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Bryan Wu <cooloney@gmail.com>hifive-unleashed-5.1
Alexander Shiyan
Bryan Wu
parent
2f18f8d638
commit
25c6579f87
|
|
@ -10,9 +10,44 @@ Optional properties:
|
|||
- fsl,mc13xxx-uses-touch : Indicate the touchscreen controller is being used
|
||||
|
||||
Sub-nodes:
|
||||
- leds : Contain the led nodes and initial register values in property
|
||||
"led-control". Number of register depends of used IC, for MC13783 is 6,
|
||||
for MC13892 is 4, for MC34708 is 1. See datasheet for bits definitions of
|
||||
these registers.
|
||||
- #address-cells: Must be 1.
|
||||
- #size-cells: Must be 0.
|
||||
Each led node should contain "reg", which used as LED ID (described below).
|
||||
Optional properties "label" and "linux,default-trigger" is described in
|
||||
Documentation/devicetree/bindings/leds/common.txt.
|
||||
- regulators : Contain the regulator nodes. The regulators are bound using
|
||||
their names as listed below with their registers and bits for enabling.
|
||||
|
||||
MC13783 LED IDs:
|
||||
0 : Main display
|
||||
1 : AUX display
|
||||
2 : Keypad
|
||||
3 : Red 1
|
||||
4 : Green 1
|
||||
5 : Blue 1
|
||||
6 : Red 2
|
||||
7 : Green 2
|
||||
8 : Blue 2
|
||||
9 : Red 3
|
||||
10 : Green 3
|
||||
11 : Blue 3
|
||||
|
||||
MC13892 LED IDs:
|
||||
0 : Main display
|
||||
1 : AUX display
|
||||
2 : Keypad
|
||||
3 : Red
|
||||
4 : Green
|
||||
5 : Blue
|
||||
|
||||
MC34708 LED IDs:
|
||||
0 : Charger Red
|
||||
1 : Charger Green
|
||||
|
||||
MC13783 regulators:
|
||||
sw1a : regulator SW1A (register 24, bit 0)
|
||||
sw1b : regulator SW1B (register 25, bit 0)
|
||||
|
|
@ -89,6 +124,18 @@ ecspi@70010000 { /* ECSPI1 */
|
|||
interrupt-parent = <&gpio0>;
|
||||
interrupts = <8>;
|
||||
|
||||
leds {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <0>;
|
||||
led-control = <0x000 0x000 0x0e0 0x000>;
|
||||
|
||||
sysled {
|
||||
reg = <3>;
|
||||
label = "system:red:live";
|
||||
linux,default-trigger = "heartbeat";
|
||||
};
|
||||
};
|
||||
|
||||
regulators {
|
||||
sw1_reg: mc13892__sw1 {
|
||||
regulator-min-microvolt = <600000>;
|
||||
|
|
|
|||
|
|
@ -20,6 +20,7 @@
|
|||
#include <linux/init.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/leds.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/mfd/mc13xxx.h>
|
||||
|
||||
|
|
@ -42,7 +43,7 @@ struct mc13xxx_leds {
|
|||
struct mc13xxx *master;
|
||||
struct mc13xxx_led_devtype *devtype;
|
||||
int num_leds;
|
||||
struct mc13xxx_led led[0];
|
||||
struct mc13xxx_led *led;
|
||||
};
|
||||
|
||||
static unsigned int mc13xxx_max_brightness(int id)
|
||||
|
|
@ -120,6 +121,74 @@ static void mc13xxx_led_set(struct led_classdev *led_cdev,
|
|||
schedule_work(&led->work);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
|
||||
struct mc13xxx_leds_platform_data *pdata;
|
||||
struct device_node *parent, *child;
|
||||
struct device *dev = &pdev->dev;
|
||||
int i = 0, ret = -ENODATA;
|
||||
|
||||
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
|
||||
if (!pdata)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
of_node_get(dev->parent->of_node);
|
||||
|
||||
parent = of_find_node_by_name(dev->parent->of_node, "leds");
|
||||
if (!parent)
|
||||
goto out_node_put;
|
||||
|
||||
ret = of_property_read_u32_array(parent, "led-control",
|
||||
pdata->led_control,
|
||||
leds->devtype->num_regs);
|
||||
if (ret)
|
||||
goto out_node_put;
|
||||
|
||||
pdata->num_leds = of_get_child_count(parent);
|
||||
|
||||
pdata->led = devm_kzalloc(dev, pdata->num_leds * sizeof(*pdata->led),
|
||||
GFP_KERNEL);
|
||||
if (!pdata->led) {
|
||||
ret = -ENOMEM;
|
||||
goto out_node_put;
|
||||
}
|
||||
|
||||
for_each_child_of_node(parent, child) {
|
||||
const char *str;
|
||||
u32 tmp;
|
||||
|
||||
if (of_property_read_u32(child, "reg", &tmp))
|
||||
continue;
|
||||
pdata->led[i].id = leds->devtype->led_min + tmp;
|
||||
|
||||
if (!of_property_read_string(child, "label", &str))
|
||||
pdata->led[i].name = str;
|
||||
if (!of_property_read_string(child, "linux,default-trigger",
|
||||
&str))
|
||||
pdata->led[i].default_trigger = str;
|
||||
|
||||
i++;
|
||||
}
|
||||
|
||||
pdata->num_leds = i;
|
||||
ret = i > 0 ? 0 : -ENODATA;
|
||||
|
||||
out_node_put:
|
||||
of_node_put(parent);
|
||||
|
||||
return ret ? ERR_PTR(ret) : pdata;
|
||||
}
|
||||
#else
|
||||
static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
return ERR_PTR(-ENOSYS);
|
||||
}
|
||||
#endif
|
||||
|
||||
static int __init mc13xxx_led_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
|
|
@ -128,32 +197,37 @@ static int __init mc13xxx_led_probe(struct platform_device *pdev)
|
|||
struct mc13xxx_led_devtype *devtype =
|
||||
(struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
|
||||
struct mc13xxx_leds *leds;
|
||||
int i, id, num_leds, ret = -ENODATA;
|
||||
int i, id, ret = -ENODATA;
|
||||
u32 init_led = 0;
|
||||
|
||||
if (!pdata) {
|
||||
dev_err(dev, "Missing platform data\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
num_leds = pdata->num_leds;
|
||||
|
||||
if ((num_leds < 1) ||
|
||||
(num_leds > (devtype->led_max - devtype->led_min + 1))) {
|
||||
dev_err(dev, "Invalid LED count %d\n", num_leds);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
leds = devm_kzalloc(dev, num_leds * sizeof(struct mc13xxx_led) +
|
||||
sizeof(struct mc13xxx_leds), GFP_KERNEL);
|
||||
leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
|
||||
if (!leds)
|
||||
return -ENOMEM;
|
||||
|
||||
leds->devtype = devtype;
|
||||
leds->num_leds = num_leds;
|
||||
leds->master = mcdev;
|
||||
platform_set_drvdata(pdev, leds);
|
||||
|
||||
if (dev->parent->of_node) {
|
||||
pdata = mc13xxx_led_probe_dt(pdev);
|
||||
if (IS_ERR(pdata))
|
||||
return PTR_ERR(pdata);
|
||||
} else if (!pdata)
|
||||
return -ENODATA;
|
||||
|
||||
leds->num_leds = pdata->num_leds;
|
||||
|
||||
if ((leds->num_leds < 1) ||
|
||||
(leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
|
||||
dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
leds->led = devm_kzalloc(dev, leds->num_leds * sizeof(*leds->led),
|
||||
GFP_KERNEL);
|
||||
if (!leds->led)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < devtype->num_regs; i++) {
|
||||
ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
|
||||
pdata->led_control[i]);
|
||||
|
|
@ -161,7 +235,7 @@ static int __init mc13xxx_led_probe(struct platform_device *pdev)
|
|||
return ret;
|
||||
}
|
||||
|
||||
for (i = 0; i < num_leds; i++) {
|
||||
for (i = 0; i < leds->num_leds; i++) {
|
||||
const char *name, *trig;
|
||||
|
||||
ret = -EINVAL;
|
||||
|
|
|
|||
Loading…
Reference in New Issue