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authorThierry Reding <treding@nvidia.com>2019-02-21 18:46:33 +0300
committerKishon Vijay Abraham I <kishon@ti.com>2019-04-17 11:42:45 +0300
commita630d54dfa937a937e3faf172ca41b9bd2647c72 (patch)
tree99cd9693ea66fc0134fa452b1659b6d16dc57839 /drivers/phy
parent5311a7b89502592045812f97294f756b1fca132b (diff)
downloadlinux-a630d54dfa937a937e3faf172ca41b9bd2647c72.tar.xz
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: JC Kuo <jckuo@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy')
-rw-r--r--drivers/phy/tegra/xusb.c34
-rw-r--r--drivers/phy/tegra/xusb.h5
2 files changed, 38 insertions, 1 deletions
diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 57a2d08ef6da..e510629f4f1c 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -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);
diff --git a/drivers/phy/tegra/xusb.h b/drivers/phy/tegra/xusb.h
index bb60fc09c752..5d5d22f6cb41 100644
--- a/drivers/phy/tegra/xusb.h
+++ b/drivers/phy/tegra/xusb.h
@@ -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,