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| author | Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> | 2025-05-07 15:50:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-04 14:41:52 +0200 |
| commit | 1efbe2c7a0f4487faea5d490c5e90b1363121339 (patch) | |
| tree | 4e3d03a11c0f2bef2cbb0382036c6755e9b47796 /drivers/phy | |
| parent | cf60d19721bc4c6c60918cf9aa28c6164ed48cc3 (diff) | |
| download | linux-1efbe2c7a0f4487faea5d490c5e90b1363121339.tar.gz linux-1efbe2c7a0f4487faea5d490c5e90b1363121339.tar.bz2 linux-1efbe2c7a0f4487faea5d490c5e90b1363121339.zip | |
phy: renesas: rcar-gen3-usb2: Assert PLL reset on PHY power off
[ Upstream commit 9ce71e85b29eb63e48e294479742e670513f03a0 ]
Assert PLL reset on PHY power off. This saves power.
Fixes: f3b5a8d9b50d ("phy: rcar-gen3-usb2: Add R-Car Gen3 USB2 PHY driver")
Cc: stable@vger.kernel.org
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://lore.kernel.org/r/20250507125032.565017-5-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/renesas/phy-rcar-gen3-usb2.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c index 793f07617117..9a6391361a0b 100644 --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c @@ -537,9 +537,17 @@ static int rcar_gen3_phy_usb2_power_off(struct phy *p) struct rcar_gen3_chan *channel = rphy->ch; int ret = 0; - scoped_guard(spinlock_irqsave, &channel->lock) + scoped_guard(spinlock_irqsave, &channel->lock) { rphy->powered = false; + if (rcar_gen3_are_all_rphys_power_off(channel)) { + u32 val = readl(channel->base + USB2_USBCTR); + + val |= USB2_USBCTR_PLL_RST; + writel(val, channel->base + USB2_USBCTR); + } + } + if (channel->vbus) ret = regulator_disable(channel->vbus); |