@@ -22,6 +22,7 @@
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/slab.h>
+#include <soc/tegra/pmc.h>
#include "xhci.h"
@@ -974,20 +975,6 @@ static int tegra_xusb_probe(struct platform_device *pdev)
if (IS_ERR(tegra->padctl))
return PTR_ERR(tegra->padctl);
- tegra->host_rst = devm_reset_control_get(&pdev->dev, "xusb_host");
- if (IS_ERR(tegra->host_rst)) {
- err = PTR_ERR(tegra->host_rst);
- dev_err(&pdev->dev, "failed to get xusb_host reset: %d\n", err);
- goto put_padctl;
- }
-
- tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss");
- if (IS_ERR(tegra->ss_rst)) {
- err = PTR_ERR(tegra->ss_rst);
- dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n", err);
- goto put_padctl;
- }
-
tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
if (IS_ERR(tegra->host_clk)) {
err = PTR_ERR(tegra->host_clk);
@@ -1051,11 +1038,48 @@ static int tegra_xusb_probe(struct platform_device *pdev)
goto put_padctl;
}
+ if (!pdev->dev.pm_domain) {
+ tegra->host_rst = devm_reset_control_get(&pdev->dev,
+ "xusb_host");
+ if (IS_ERR(tegra->host_rst)) {
+ err = PTR_ERR(tegra->host_rst);
+ dev_err(&pdev->dev,
+ "failed to get xusb_host reset: %d\n", err);
+ goto put_padctl;
+ }
+
+ tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss");
+ if (IS_ERR(tegra->ss_rst)) {
+ err = PTR_ERR(tegra->ss_rst);
+ dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n",
+ err);
+ goto put_padctl;
+ }
+
+ err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA,
+ tegra->ss_clk,
+ tegra->ss_rst);
+ if (err) {
+ dev_err(&pdev->dev,
+ "failed to enable XUSBA domain: %d\n", err);
+ goto put_padctl;
+ }
+
+ err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
+ tegra->host_clk,
+ tegra->host_rst);
+ if (err) {
+ dev_err(&pdev->dev,
+ "failed to enable XUSBC domain: %d\n", err);
+ goto disable_xusba;
+ }
+ }
+
tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies,
sizeof(*tegra->supplies), GFP_KERNEL);
if (!tegra->supplies) {
err = -ENOMEM;
- goto put_padctl;
+ goto disable_xusbc;
}
for (i = 0; i < tegra->soc->num_supplies; i++)
@@ -1065,7 +1089,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
tegra->supplies);
if (err) {
dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
- goto put_padctl;
+ goto disable_xusbc;
}
for (i = 0; i < tegra->soc->num_types; i++)
@@ -1075,7 +1099,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
sizeof(*tegra->phys), GFP_KERNEL);
if (!tegra->phys) {
err = -ENOMEM;
- goto put_padctl;
+ goto disable_xusbc;
}
for (i = 0, k = 0; i < tegra->soc->num_types; i++) {
@@ -1091,7 +1115,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
"failed to get PHY %s: %ld\n", prop,
PTR_ERR(phy));
err = PTR_ERR(phy);
- goto put_padctl;
+ goto disable_xusbc;
}
tegra->phys[k++] = phy;
@@ -1102,7 +1126,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
dev_name(&pdev->dev));
if (!tegra->hcd) {
err = -ENOMEM;
- goto put_padctl;
+ goto disable_xusbc;
}
/*
@@ -1198,6 +1222,12 @@ static int tegra_xusb_probe(struct platform_device *pdev)
disable_rpm:
pm_runtime_disable(&pdev->dev);
usb_put_hcd(tegra->hcd);
+disable_xusbc:
+ if (!&pdev->dev.pm_domain)
+ tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
+disable_xusba:
+ if (!&pdev->dev.pm_domain)
+ tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
put_padctl:
tegra_xusb_padctl_put(tegra->padctl);
return err;
The Tegra XHCI controller requires that the XUSBA (for superspeed) and XUSBC (for host) power-domains are enabled. Commit 8df127456f29 ("soc/tegra: pmc: Enable XUSB partitions on boot") was added to force on these power-domains if the XHCI driver is enabled while proper power-domain support is added, to ensure the device did not hang on boot. However, rather than forcing on these power-domains in the PMC driver we can use the legacy Tegra powergate APIs to turn on these power-domains during the probe of the Tegra XHCI driver. In the near future we plan to move the Tegra XHCI driver to use the generic PM domain framework for power-domains and so to prepare for this only use the legacy Tegra powergate API if there is not PM domain associated with device (ie. dev.pm_domain is NULL). Please note that in the future the superspeed and host resets will be handled by the generic PM domain provider and so these are only these are only needed in the case where there is no generic PM domain. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> --- Changes since V2: - Add Thierry's ACK Changes since V1: - None drivers/usb/host/xhci-tegra.c | 68 +++++++++++++++++++++++++++++++------------ 1 file changed, 49 insertions(+), 19 deletions(-)