diff mbox series

[V6,4/6] phy: tegra: xusb: Disable trk clk when not in use

Message ID 20230111110450.24617-5-jonathanh@nvidia.com
State Accepted
Headers show
Series Enable USB host on Jetson AGX Orin | expand

Commit Message

Jon Hunter Jan. 11, 2023, 11:04 a.m. UTC 
From: Wayne Chang <waynec@nvidia.com>

Pad tracking is a one-time calibration for Tegra186 and Tegra194.
Clk should be disabled after calibration.

Disable clk after calibration.
While at it add 100us delay for HW recording the calibration value.

Signed-off-by: Wayne Chang <waynec@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
V2 -> V6: no changes
V1 -> V2: update the commit message

 drivers/phy/tegra/xusb-tegra186.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Vinod Koul Jan. 12, 2023, 5:27 p.m. UTC | #1 
On 11-01-23, 11:04, Jon Hunter wrote:
> From: Wayne Chang <waynec@nvidia.com>
> 
> Pad tracking is a one-time calibration for Tegra186 and Tegra194.
> Clk should be disabled after calibration.
> 
> Disable clk after calibration.
> While at it add 100us delay for HW recording the calibration value.

I have applied these two, somehow replied to an older thread..

Sorry for the noise
diff mbox series

Patch

diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c
index 6a8bd87cfdbd..c00d14f27ab4 100644
--- a/drivers/phy/tegra/xusb-tegra186.c
+++ b/drivers/phy/tegra/xusb-tegra186.c
@@ -609,6 +609,10 @@  static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl)
 	value &= ~USB2_PD_TRK;
 	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
 
+	udelay(100);
+
+	clk_disable_unprepare(priv->usb2_trk_clk);
+
 	mutex_unlock(&padctl->lock);
 }
 
@@ -633,8 +637,6 @@  static void tegra186_utmi_bias_pad_power_off(struct tegra_xusb_padctl *padctl)
 	value |= USB2_PD_TRK;
 	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
 
-	clk_disable_unprepare(priv->usb2_trk_clk);
-
 	mutex_unlock(&padctl->lock);
 }