diff options
| -rw-r--r-- | Documentation/devicetree/bindings/mfd/mc13xxx.txt | 47 | ||||
| -rw-r--r-- | drivers/leds/leds-mc13783.c | 112 |
2 files changed, 140 insertions, 19 deletions
diff --git a/Documentation/devicetree/bindings/mfd/mc13xxx.txt b/Documentation/devicetree/bindings/mfd/mc13xxx.txt index abd9e3cb2db..1413f39912d 100644 --- a/Documentation/devicetree/bindings/mfd/mc13xxx.txt +++ b/Documentation/devicetree/bindings/mfd/mc13xxx.txt @@ -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>; diff --git a/drivers/leds/leds-mc13783.c b/drivers/leds/leds-mc13783.c index 15fa5e86abc..021adc11162 100644 --- a/drivers/leds/leds-mc13783.c +++ b/drivers/leds/leds-mc13783.c @@ -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; |