Merge "qcom: spmi-wled: Add support for OVP interrupt handling" (f81ad3ba) · Commits · e / devices / android_kernel_oneplus_sm8150

Documentation/devicetree/bindings/leds/backlight/qcom-spmi-wled.txt

+4 −3

Original line number	Diff line number	Diff line
		@@ -92,7 +92,7 @@ platforms. The PMIC is connected to the host processor via SPMI bus.
		Usage: optional
		Value type: <string>
		Definition: Interrupt names associated with the interrupts.
		Must be "sc-irq".
		Currently supported interrupts are "sc-irq" and "ovp-irq".

		Example:

		@@ -102,8 +102,9 @@ qcom-wled@d800 {
		reg-names = "wled-ctrl-base", "wled-sink-base";
		label = "backlight";

		interrupts = <0x3 0xd8 0x2 IRQ_TYPE_EDGE_RISING>;
		interrupt-names = "sc-irq";
		interrupts = <0x3 0xd8 0x2 IRQ_TYPE_EDGE_RISING>,
		<0x3 0xd8 0x1 IRQ_TYPE_EDGE_RISING>;
		interrupt-names = "sc-irq", "ovp-irq";
		qcom,fs-current-limit = <25000>;
		qcom,current-boost-limit = <970>;
		qcom,switching-freq = <800>;

drivers/video/backlight/qcom-spmi-wled.c

+84 −0

Original line number	Diff line number	Diff line
		@@ -29,8 +29,15 @@
		#define WLED_DEFAULT_BRIGHTNESS 2048
		#define WLED_MAX_BRIGHTNESS 4095

		#define WLED_SOFT_START_DLY_US 10000

		/* WLED control registers */
		#define WLED_CTRL_FAULT_STATUS 0x08
		#define WLED_CTRL_ILIM_FAULT_BIT BIT(0)
		#define WLED_CTRL_OVP_FAULT_BIT BIT(1)
		#define WLED_CTRL_SC_FAULT_BIT BIT(2)

		#define WLED_CTRL_INT_RT_STS 0x10

		#define WLED_CTRL_MOD_ENABLE 0x46
		#define WLED_CTRL_MOD_EN_MASK BIT(7)
		@@ -89,6 +96,7 @@ struct wled_config {
		u32 fs_current;
		u32 string_cfg;
		int sc_irq;
		int ovp_irq;
		bool en_cabc;
		bool ext_pfet_sc_pro_en;
		};
		@@ -105,6 +113,7 @@ struct wled {
		u32 brightness;
		u32 sc_count;
		bool prev_state;
		bool ovp_irq_disabled;
		};

		static int wled_module_enable(struct wled *wled, int val)
		@@ -114,6 +123,28 @@ static int wled_module_enable(struct wled *wled, int val)
		rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
		WLED_CTRL_MOD_ENABLE, WLED_CTRL_MOD_EN_MASK,
		val << WLED_CTRL_MODULE_EN_SHIFT);
		if (rc < 0)
		return rc;
		/*
		* Wait for at least 10ms before enabling OVP fault interrupt after
		* enabling the module so that soft start is completed. Keep the OVP
		* interrupt disabled when the module is disabled.
		*/
		if (val) {
		usleep_range(WLED_SOFT_START_DLY_US,
		WLED_SOFT_START_DLY_US + 1000);

		if (wled->cfg.ovp_irq > 0 && wled->ovp_irq_disabled) {
		enable_irq(wled->cfg.ovp_irq);
		wled->ovp_irq_disabled = false;
		}
		} else {
		if (wled->cfg.ovp_irq > 0 && !wled->ovp_irq_disabled) {
		disable_irq(wled->cfg.ovp_irq);
		wled->ovp_irq_disabled = true;
		}
		}

		return rc;
		}

		@@ -266,12 +297,42 @@ static irqreturn_t wled_sc_irq_handler(int irq, void *_wled)
		return IRQ_HANDLED;
		}

		static irqreturn_t wled_ovp_irq_handler(int irq, void *_wled)
		{
		struct wled *wled = _wled;
		int rc;
		u32 int_sts, fault_sts;

		rc = regmap_read(wled->regmap,
		wled->ctrl_addr + WLED_CTRL_INT_RT_STS, &int_sts);
		if (rc < 0) {
		pr_err("Error in reading WLED_INT_RT_STS rc=%d\n", rc);
		return IRQ_HANDLED;
		}

		rc = regmap_read(wled->regmap, wled->ctrl_addr +
		WLED_CTRL_FAULT_STATUS, &fault_sts);
		if (rc < 0) {
		pr_err("Error in reading WLED_FAULT_STATUS rc=%d\n", rc);
		return IRQ_HANDLED;
		}

		if (fault_sts &
		(WLED_CTRL_OVP_FAULT_BIT \| WLED_CTRL_ILIM_FAULT_BIT))
		pr_err("WLED OVP fault detected, int_sts=%x fault_sts= %x\n",
		int_sts, fault_sts);

		return IRQ_HANDLED;
		}

		static int wled_setup(struct wled *wled)
		{
		int rc, temp, i;
		u8 sink_en = 0;
		u32 val;
		u8 string_cfg = wled->cfg.string_cfg;
		int sc_irq = wled->cfg.sc_irq;
		int ovp_irq = wled->cfg.ovp_irq;

		rc = regmap_update_bits(wled->regmap,
		wled->ctrl_addr + WLED_CTRL_OVP,
		@@ -369,6 +430,25 @@ static int wled_setup(struct wled *wled)
		return rc;
		}

		if (ovp_irq >= 0) {
		rc = devm_request_threaded_irq(&wled->pdev->dev, ovp_irq,
		NULL, wled_ovp_irq_handler, IRQF_ONESHOT,
		"wled_ovp_irq", wled);
		if (rc < 0) {
		dev_err(&wled->pdev->dev, "Unable to request ovp(%d) IRQ(err:%d)\n",
		ovp_irq, rc);
		return rc;
		}

		rc = regmap_read(wled->regmap, wled->ctrl_addr +
		WLED_CTRL_MOD_ENABLE, &val);
		/* disable the OVP irq only if the module is not enabled */
		if (!rc && !(val & WLED_CTRL_MOD_EN_MASK)) {
		disable_irq(ovp_irq);
		wled->ovp_irq_disabled = true;
		}
		}

		return 0;
		}

		@@ -541,6 +621,10 @@ static int wled_configure(struct wled wled, struct device dev)
		if (wled->cfg.sc_irq < 0)
		dev_dbg(&wled->pdev->dev, "sc irq is not used\n");

		wled->cfg.ovp_irq = platform_get_irq_byname(wled->pdev, "ovp-irq");
		if (wled->cfg.ovp_irq < 0)
		dev_dbg(&wled->pdev->dev, "ovp irq is not used\n");

		return 0;
		}