Re: [PATCH v3 07/15] phy: tegra: xusb: Add sleepwalk and suspend/resume

Thierry Reding
2020-09-28T13:11:26Z

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On Wed, Sep 09, 2020 at 04:10:33PM +0800, JC Kuo wrote:
> This commit adds sleepwalk/wake and suspend/resume interfaces
> to Tegra XUSB PHY driver.
>
> Tegra XUSB host controller driver makes use of sleepwalk functions
> to enable/disable sleepwalk circuit which is in always-on partition
> and can respond to USB resume signals when controller is not powered.
> Sleepwalk can be enabled/disabled for any USB UPHY individually.
>
> - tegra_xusb_padctl_enable_phy_sleepwalk()
> - tegra_xusb_padctl_disable_phy_sleepwalk()
>
> Tegra XUSB host controller driver makes use of wake functions to
> enable/disable/query wake circuit which is in always-on partition
> can wake system up when USB resume happens.
> Wake circuit can be enabled/disabled for any USB PHY individually.
>
> - tegra_xusb_padctl_enable_phy_wake()
> - tegra_xusb_padctl_disable_phy_wake()
> - tegra_xusb_padctl_remote_wake_detected()
>
> This commit also adds two system suspend stubs that can be used to
> save and restore XUSB PADCTL context during system suspend and
> resume.
> - tegra_xusb_padctl_suspend_noirq()
> - tegra_xusb_padctl_resume_noirq()
>
> Signed-off-by: JC Kuo <jckuo@nvidia.com>
> ---
> v3:
> commit message improvement, no change in code
>
> drivers/phy/tegra/xusb.c | 73 ++++++++++++++++++++++++++++++++++
> drivers/phy/tegra/xusb.h | 9 +++++
> include/linux/phy/tegra/xusb.h | 8 ++++
> 3 files changed, 90 insertions(+)

Acked-by: Thierry Reding <treding@nvidia.com>

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