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