diff options
| author | Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> | 2024-03-13 10:20:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-26 10:44:53 +0100 |
| commit | 4483ef3c1685290251f7caf18377f793e0901460 (patch) | |
| tree | 37c1534da6bba7bd90ff1d6d6cdb3d2510c28c0d /drivers/usb/dwc2/hcd.c | |
| parent | usb: dwc2: New bit definition in GPWRDN register (diff) | |
| download | linux-4483ef3c1685290251f7caf18377f793e0901460.tar.xz linux-4483ef3c1685290251f7caf18377f793e0901460.zip | |
usb: dwc2: Add hibernation updates for ULPI PHY
Added programmming of ULPI_LATCH_EN_DURING_HIB_ENTRY bit in GPWRDN
register when using ULPI PHY during entry/exit to/from hibernation.
This bit set to 1 during entering to hibernation if ULPI PHY used.
On exiting from hibernation this bit reset to 0.
Applicable for both host and device modes.
Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Link: https://lore.kernel.org/r/e024cb39a7177ec201c873df25ca6365f2e55947.1708948356.git.Minas.Harutyunyan@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2/hcd.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 35c7a4df8e71..cc75a7062910 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -5503,6 +5503,11 @@ int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg) gusbcfg = dwc2_readl(hsotg, GUSBCFG); if (gusbcfg & GUSBCFG_ULPI_UTMI_SEL) { /* ULPI interface */ + udelay(10); + gpwrdn = dwc2_readl(hsotg, GPWRDN); + gpwrdn |= GPWRDN_ULPI_LATCH_EN_DURING_HIB_ENTRY; + dwc2_writel(hsotg, gpwrdn, GPWRDN); + udelay(10); /* Suspend the Phy Clock */ pcgcctl = dwc2_readl(hsotg, PCGCTL); pcgcctl |= PCGCTL_STOPPCLK; @@ -5609,6 +5614,11 @@ int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, dwc2_writel(hsotg, gr->gusbcfg, GUSBCFG); dwc2_writel(hsotg, hr->hcfg, HCFG); + /* Reset ULPI latch */ + gpwrdn = dwc2_readl(hsotg, GPWRDN); + gpwrdn &= ~GPWRDN_ULPI_LATCH_EN_DURING_HIB_ENTRY; + dwc2_writel(hsotg, gpwrdn, GPWRDN); + /* De-assert Wakeup Logic */ gpwrdn = dwc2_readl(hsotg, GPWRDN); gpwrdn &= ~GPWRDN_PMUACTV; |