diff mbox series

[v3,10/13] phy: tegra: xusb: Disable trk clk when not in use

Message ID 20221114124053.1873316-11-waynec@nvidia.com
State New
Headers show
Series Enable USB host and device functions on Jetson | expand

Commit Message

Wayne Chang Nov. 14, 2022, 12:40 p.m. UTC 
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>
---
V2 -> V3:nothing has changed
V1 -> V2:update the commit message.
 drivers/phy/tegra/xusb-tegra186.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Jon Hunter Nov. 15, 2022, 12:19 p.m. UTC | #1 
On 14/11/2022 12:40, Wayne Chang wrote:
> 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>
> ---
> V2 -> V3:nothing has changed
> V1 -> V2:update the commit message.
>   drivers/phy/tegra/xusb-tegra186.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c
> index 0996ede63387..f121b4ffbbfd 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);
>   }
>   


Reviewed-by: Jon Hunter <jonathanh@nvidia.com>

Thanks
Jon
Vinod Koul Jan. 12, 2023, 5:23 p.m. UTC | #2 
On 14-11-22, 20:40, Wayne Chang wrote:
> 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.

Applied, thanks
diff mbox series

Patch

diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c
index 0996ede63387..f121b4ffbbfd 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);
 }