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Commit b4008bc2 authored by Jack Pham's avatar Jack Pham
Browse files

usb: dwc3: of-simple: add support for GDSC regulator 



On QCOM platforms, the GDSC regulator is required to be enabled
prior to enabling the clocks. Add support for this optional
regulator.

Change-Id: Ic9484af727e8a7176521e9366e38d852c7747995
Signed-off-by: default avatarJack Pham <jackp@codeaurora.org>
parent 83569191

drivers/usb/dwc3/dwc3-of-simple.c

+16 −0
Original line number Diff line number Diff line
@@ -29,11 +29,13 @@ 
#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/pm_runtime.h>

#include <linux/regulator/consumer.h>



struct dwc3_of_simple {

	struct device		*dev;

	struct clk		**clks;

	int			num_clocks;

	struct regulator	*gdsc;

};



static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
@@ -96,6 +98,17 @@ static int dwc3_of_simple_probe(struct platform_device *pdev) 
	platform_set_drvdata(pdev, simple);

	simple->dev = dev;



	simple->gdsc = devm_regulator_get(dev, "USB3_GDSC");

	if (IS_ERR(simple->gdsc)) {

		simple->gdsc = NULL;

	} else {

		ret = regulator_enable(simple->gdsc);

		if (ret) {

			dev_err(dev, "unable to enable usb3 gdsc\n");

			return ret;

		}

	}



	ret = dwc3_of_simple_clk_init(simple, of_clk_get_parent_count(np));

	if (ret)

		return ret;
@@ -128,6 +141,9 @@ static int dwc3_of_simple_remove(struct platform_device *pdev) 
		clk_put(simple->clks[i]);

	}



	if (simple->gdsc)

		regulator_disable(simple->gdsc);



	of_platform_depopulate(dev);



	pm_runtime_put_sync(dev);