Commit a630d54d authored by Thierry Reding's avatar Thierry Reding Committed by Kishon Vijay Abraham I
Browse files

phy: tegra: xusb: Add support for power supplies 



Support enabling various supplies needed to provide power to the PLLs
and logic used to drive the USB, PCI and SATA pads.

Reviewed-by: default avatarJC Kuo <jckuo@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 5311a7b8

drivers/phy/tegra/xusb.c

+33 −1
Original line number Diff line number Diff line
@@ -864,6 +864,7 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev) 
	struct tegra_xusb_padctl *padctl;

	const struct of_device_id *match;

	struct resource *res;

	unsigned int i;

	int err;



	/* for backwards compatibility with old device trees */
@@ -901,14 +902,38 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev) 
		goto remove;

	}



	padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,

					sizeof(*padctl->supplies), GFP_KERNEL);

	if (!padctl->supplies) {

		err = -ENOMEM;

		goto remove;

	}



	for (i = 0; i < padctl->soc->num_supplies; i++)

		padctl->supplies[i].supply = padctl->soc->supply_names[i];



	err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,

				      padctl->supplies);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to get regulators: %d\n", err);

		goto remove;

	}



	err = reset_control_deassert(padctl->rst);

	if (err < 0)

		goto remove;



	err = regulator_bulk_enable(padctl->soc->num_supplies,

				    padctl->supplies);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);

		goto reset;

	}



	err = tegra_xusb_setup_pads(padctl);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to setup pads: %d\n", err);

		goto reset;

		goto power_down;

	}



	err = tegra_xusb_setup_ports(padctl);
@@ -921,6 +946,8 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev) 


remove_pads:

	tegra_xusb_remove_pads(padctl);

power_down:

	regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);

reset:

	reset_control_assert(padctl->rst);

remove:
@@ -936,6 +963,11 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev) 
	tegra_xusb_remove_ports(padctl);

	tegra_xusb_remove_pads(padctl);



	err = regulator_bulk_disable(padctl->soc->num_supplies,

				     padctl->supplies);

	if (err < 0)

		dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);



	err = reset_control_assert(padctl->rst);

	if (err < 0)

		dev_err(&pdev->dev, "failed to assert reset: %d\n", err);

drivers/phy/tegra/xusb.h

+5 −0
Original line number Diff line number Diff line
@@ -370,6 +370,9 @@ struct tegra_xusb_padctl_soc { 
	} ports;



	const struct tegra_xusb_padctl_ops *ops;



	const char * const *supply_names;

	unsigned int num_supplies;

};



struct tegra_xusb_padctl {
@@ -393,6 +396,8 @@ struct tegra_xusb_padctl { 
	unsigned int enable;



	struct clk *clk;



	struct regulator_bulk_data *supplies;

};



static inline void padctl_writel(struct tegra_xusb_padctl *padctl, u32 value,