Merge "leds: qpnp-wled: add interrupt support" (aa93bbba) · Commits · e / devices / android_kernel_sony_msm8994

Documentation/devicetree/bindings/leds/leds-qpnp-wled.txt

+7 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,11 @@ Required properties:
		"qpnp-wled-ibb-base", "qpnp-wled-lab-base".

		Optional properties for WLED:
		- interrupts : Specifies the interrupts associated with WLED. The available
		interrupts are over voltage protection(ovp) and short circuit(sc).
		The values for ovp and sc are <0x3 0xd8 0x1> and <0x3 0xd8 0x2>.
		- interrupt-names : Specify the interrupt names associated with interrupts. Must be
		one of "ovp-irq" or "sc-irq"
		- linux,name : name of the wled. default is "wled".
		- linux,default-trigger : trigger for the backlight. default is NONE.
		- qcom,fdbk-output : string feedback current output for wled module. The accepted values
		@@ -58,6 +63,8 @@ Example:
		"qpnp-wled-sink-base",
		"qpnp-wled-ibb-base",
		"qpnp-wled-lab-base";
		interrupts = <0x3 0xd8 0x2>;
		interrupt-names = "sc-irq";
		linux,name = "wled";
		linux,default-trigger = "bkl-trigger";
		qcom,fdbk-output = "auto";

drivers/leds/leds-qpnp-wled.c

+71 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,10 @@
		#include <linux/delay.h>
		#include <linux/leds-qpnp-wled.h>

		#define QPNP_IRQ_FLAGS (IRQF_TRIGGER_RISING \| \
		IRQF_TRIGGER_FALLING \| \
		IRQF_ONESHOT)

		/* base addresses */
		#define QPNP_WLED_CTRL_BASE "qpnp-wled-ctrl-base"
		#define QPNP_WLED_SINK_BASE "qpnp-wled-sink-base"
		@@ -152,6 +156,7 @@
		#define QPNP_WLED_TRIGGER_NONE "none"
		#define QPNP_WLED_STR_SIZE 20
		#define QPNP_WLED_MIN_MSLEEP 20
		#define QPNP_WLED_SC_DLY_MS 20

		/* output feedback mode */
		enum qpnp_wled_fdbk_op {
		@@ -242,6 +247,9 @@ struct qpnp_wled {
		enum qpnp_wled_fdbk_op fdbk_op;
		enum qpnp_wled_dim_mode dim_mode;
		enum qpnp_wled_dim_shape dim_shape;
		int ovp_irq;
		int sc_irq;
		u32 sc_cnt;
		u16 ctrl_base;
		u16 sink_base;
		u16 ibb_base;
		@@ -867,6 +875,32 @@ static int qpnp_wled_mod_rdy(struct qpnp_wled *wled, u16 base_addr, bool state)
		return 0;
		}

		/* ovp irq handler */
		static irqreturn_t qpnp_wled_ovp_irq(int irq, void *_wled)
		{
		struct qpnp_wled *wled = _wled;

		dev_dbg(&wled->spmi->dev, "ovp detected\n");

		return IRQ_HANDLED;
		}


		/* short circuit irq handler */
		static irqreturn_t qpnp_wled_sc_irq(int irq, void *_wled)
		{
		struct qpnp_wled *wled = _wled;

		dev_err(&wled->spmi->dev,
		"Short circuit detected %d times\n", ++wled->sc_cnt);

		qpnp_wled_module_en(wled, wled->ctrl_base, false);
		msleep(QPNP_WLED_SC_DLY_MS);
		qpnp_wled_module_en(wled, wled->ctrl_base, true);

		return IRQ_HANDLED;
		}

		/* Configure WLED registers */
		static int qpnp_wled_config(struct qpnp_wled *wled)
		{
		@@ -1190,6 +1224,34 @@ static int qpnp_wled_config(struct qpnp_wled *wled)
		if (rc < 0)
		return rc;

		/* setup ovp and sc irqs */
		if (wled->ovp_irq >= 0) {
		rc = devm_request_threaded_irq(&wled->spmi->dev, wled->ovp_irq,
		NULL, qpnp_wled_ovp_irq,
		QPNP_IRQ_FLAGS,
		"qpnp_wled_ovp_irq", wled);
		if (rc < 0) {
		dev_err(&wled->spmi->dev,
		"Unable to request ovp(%d) IRQ(err:%d)\n",
		wled->ovp_irq, rc);
		return rc;
		}
		}

		if (wled->sc_irq >= 0) {
		wled->sc_cnt = 0;
		rc = devm_request_threaded_irq(&wled->spmi->dev, wled->sc_irq,
		NULL, qpnp_wled_sc_irq,
		QPNP_IRQ_FLAGS,
		"qpnp_wled_sc_irq", wled);
		if (rc < 0) {
		dev_err(&wled->spmi->dev,
		"Unable to request sc(%d) IRQ(err:%d)\n",
		wled->sc_irq, rc);
		return rc;
		}
		}

		return 0;
		}

		@@ -1396,6 +1458,15 @@ static int qpnp_wled_parse_dt(struct qpnp_wled *wled)

		wled->lab_fast_precharge = of_property_read_bool(spmi->dev.of_node,
		"qcom,lab-fast-precharge");

		wled->ovp_irq = spmi_get_irq_byname(spmi, NULL, "ovp-irq");
		if (wled->ovp_irq < 0)
		dev_dbg(&spmi->dev, "ovp irq is not used\n");

		wled->sc_irq = spmi_get_irq_byname(spmi, NULL, "sc-irq");
		if (wled->sc_irq < 0)
		dev_dbg(&spmi->dev, "sc irq is not used\n");

		return 0;
		}