[PATCH v3 10/13] phy: tegra: xusb: Disable trk clk when not in use
From: Wayne Chang <hidden>
Date: 2022-11-14 12:42:45
Also in:
linux-devicetree, linux-i2c, linux-tegra, linux-usb, lkml
Subsystem:
generic phy framework, tegra xusb padctl driver, the rest · Maintainers:
Vinod Koul, JC Kuo, Linus Torvalds
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 <redacted> --- 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); }
--
2.25.1
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