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Commit 1124870d authored by Devesh Jhunjhunwala's avatar Devesh Jhunjhunwala Committed by Subbaraman Narayanamurthy
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pwm: qpnp: Add support to read the LPG LUT size from device tree 



Add support to read the qcom,lpg-lut-size property from
the device tree instead of using the value returned by the
of_get_address API.

CRs-Fixed: 1060896
Change-Id: I0f84baf29a141719dd44dabb67e9d599d9646d49
Signed-off-by: default avatarDevesh Jhunjhunwala <deveshj@codeaurora.org>
parent 8ec8b328

Documentation/devicetree/bindings/pwm/pwm-qpnp.txt

+1 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ Required device bindings: 
- reg-names:		Name for the above register.

			"qpnp-lpg-channel-base" = physical base address of the

			controller's LPG channel register.

- qcom,lpg-lut-size:	LPG LUT size.

- qcom,channel-id:	channel Id for the PWM.

- qcom,supported-sizes:	Supported PWM sizes.

			Following three pwm sizes lists are supported by PWM/LPG controllers.

drivers/pwm/pwm-qpnp.c

+9 −2
Original line number Diff line number Diff line
@@ -1879,7 +1879,7 @@ static int qpnp_parse_dt_config(struct platform_device *pdev, 
	int			rc, enable, lut_entry_size, list_size, i;

	const char		*lable;

	const __be32		*prop;

	u64			size;

	u32			size;

	struct device_node	*node;

	int found_pwm_subnode = 0;

	int found_lpg_subnode = 0;
@@ -1968,11 +1968,18 @@ static int qpnp_parse_dt_config(struct platform_device *pdev, 
		return rc;



	prop = of_get_address_by_name(pdev->dev.of_node, QPNP_LPG_LUT_BASE,

			&size, 0);

			0, 0);

	if (!prop) {

		chip->flags |= QPNP_PWM_LUT_NOT_SUPPORTED;

	} else {

		lpg_config->lut_base_addr = be32_to_cpu(*prop);

		rc = of_property_read_u32(of_node, "qcom,lpg-lut-size", &size);

		if (rc < 0) {

			dev_err(&pdev->dev, "Error reading qcom,lpg-lut-size, rc=%d\n",

					rc);

			return rc;

		}



		/*

		 * Each entry of LUT is of 2 bytes for generic LUT and of 1 byte

		 * for KPDBL/GLED LUT.