linux-kernel - [PATCH v3 03/13] phy: usb: Put USB phys into IDDQ on suspend to save power in S2 mode

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Message-Id: <20191210132132.41509-4-alcooperx@gmail.com>
Date:   Tue, 10 Dec 2019 08:21:22 -0500
From:   Al Cooper <alcooperx@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Al Cooper <alcooperx@...il.com>,
        bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Srinath Mannam <srinath.mannam@...adcom.com>
Subject: [PATCH v3 03/13] phy: usb: Put USB phys into IDDQ on suspend to save power in S2 mode

Currently the Phy driver will put the USB phys into the max
power saving mode (IDDQ) when there is no corresponding XHCI, EHCI
or OHCI client (through rmmod, unbind or if the driver is not
builtin). This change will also put the Phys into IDDQ mode
on suspend so that S2 will get the additional power savings.

Signed-off-by: Al Cooper <alcooperx@...il.com>
---
 drivers/phy/broadcom/phy-brcm-usb-init.c |  2 --
 drivers/phy/broadcom/phy-brcm-usb.c      | 11 +++++++++--
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.c b/drivers/phy/broadcom/phy-brcm-usb-init.c
index bd473d12ab28..ac7f7995c11f 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init.c
+++ b/drivers/phy/broadcom/phy-brcm-usb-init.c
@@ -1002,8 +1002,6 @@ void brcm_usb_uninit_common(struct brcm_usb_init_params *params)
 
 void brcm_usb_uninit_eohci(struct brcm_usb_init_params *params)
 {
-	if (USB_CTRL_MASK_FAMILY(params, USB_PM, USB20_HC_RESETB))
-		USB_CTRL_UNSET_FAMILY(params, USB_PM, USB20_HC_RESETB);
 }
 
 void brcm_usb_uninit_xhci(struct brcm_usb_init_params *params)
diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c
index 217e3702ef4e..634afc803778 100644
--- a/drivers/phy/broadcom/phy-brcm-usb.c
+++ b/drivers/phy/broadcom/phy-brcm-usb.c
@@ -381,8 +381,15 @@ static int brcm_usb_phy_suspend(struct device *dev)
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 
 	if (priv->init_count) {
-		clk_disable_unprepare(priv->usb_20_clk);
-		clk_disable_unprepare(priv->usb_30_clk);
+		if (priv->phys[BRCM_USB_PHY_3_0].inited)
+			brcm_usb_uninit_xhci(&priv->ini);
+		if (priv->phys[BRCM_USB_PHY_2_0].inited)
+			brcm_usb_uninit_eohci(&priv->ini);
+		brcm_usb_uninit_common(&priv->ini);
+		if (priv->phys[BRCM_USB_PHY_3_0].inited)
+			clk_disable_unprepare(priv->usb_30_clk);
+		if (priv->phys[BRCM_USB_PHY_2_0].inited)
+			clk_disable_unprepare(priv->usb_20_clk);
 	}
 	return 0;
 }
-- 
2.17.1