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Commit 1fe7ae1a authored by Rohit Kumar's avatar Rohit Kumar Committed by Gerrit - the friendly Code Review server
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mfd: wcd9xxx: Add support for gpio controlled buck VSEL pin 



This adds support to control VSEL pin of WCD buck connected
via GPIO.

Change-Id: I790bcff561143fafe1c90863b489c68afba304be
Signed-off-by: default avatarRohit Kumar <rohitkr@codeaurora.org>
parent 05e7d36b

Documentation/devicetree/bindings/sound/wcd_codec.txt

+5 −1
Original line number Diff line number Diff line
@@ -12,7 +12,6 @@ Required properties: 
 - qcom,wcd-rst-gpio-node: Phandle reference to the DT node having codec reset gpio

                        configuration. If this property is not defined, it is

                        expected to atleast define "qcom,cdc-reset-gpio" property.



 - cdc-vdd-buck-supply: phandle of buck supply's regulator device tree node.

 - qcom,cdc-vdd-buck-voltage: buck supply's voltage level min and max in mV.

 - qcom,cdc-vdd-buck-current: buck supply's max current in mA.
@@ -142,6 +141,11 @@ Optional properties: 
 - clock-names : clock name defined for external clock.

 - clocks : external clock defined for codec clock.



 - qcom,has-buck-vsel-gpio:  Boolean property to select if WCD_BUCK has VSEL

			controlled by GPIO.

 - qcom,buck-vsel-gpio-node: Phandle reference to the DT node having wcd buck

			VSEL gpio configuration.



Example:



taiko_codec {

drivers/mfd/wcd9xxx-core.c

+4 −0
Original line number Diff line number Diff line
@@ -1280,6 +1280,10 @@ static int wcd9xxx_slim_probe(struct slim_device *slim) 
		ret = -EINVAL;

		goto err_codec;

	}



	if (pdata->has_buck_vsel_gpio)

		msm_cdc_pinctrl_select_active_state(pdata->buck_vsel_ctl_np);



	device_id = slim_get_device_id(slim);

	if (!device_id) {

		dev_err(&slim->dev, "%s: Error, no device id\n", __func__);

drivers/mfd/wcd9xxx-utils.c

+13 −0
Original line number Diff line number Diff line
@@ -342,6 +342,19 @@ struct wcd9xxx_pdata *wcd9xxx_populate_dt_data(struct device *dev) 
		goto err_parse_dt_prop;

	}



	pdata->has_buck_vsel_gpio = of_property_read_bool(dev->of_node,

						"qcom,has-buck-vsel-gpio");

	if (pdata->has_buck_vsel_gpio) {

		pdata->buck_vsel_ctl_np = of_parse_phandle(dev->of_node,

				"qcom,buck-vsel-gpio-node", 0);

		if (!pdata->buck_vsel_ctl_np) {

			dev_err(dev, "%s No entry for %s property in node %s\n",

				__func__, "qcom,buck-vsel-gpio-node",

				dev->of_node->full_name);

			goto err_parse_dt_prop;

		}

	}



	if (!(wcd9xxx_read_of_property_u32(dev, "qcom,cdc-mclk-clk-rate",

					   &prop_val)))

		pdata->mclk_rate = prop_val;

include/linux/mfd/wcd9xxx/pdata.h

+2 −0
Original line number Diff line number Diff line
@@ -179,6 +179,8 @@ struct wcd9xxx_pdata { 
	int irq_base;

	int num_irqs;

	int reset_gpio;

	bool has_buck_vsel_gpio;

	struct device_node *buck_vsel_ctl_np;

	struct device_node *wcd_rst_np;

	struct wcd9xxx_amic amic_settings;

	struct slim_device slimbus_slave_device;