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Thu, 15 Jun 2023 13:06:24 -0700 (PDT) Received: from stbirv-lnx-2.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id k4-20020a05620a142400b0075ceca53e84sm5721407qkj.15.2023.06.15.13.06.23 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Jun 2023 13:06:24 -0700 (PDT) From: Justin Chen To: linux-phy@lists.infradead.org Cc: bcm-kernel-feedback-list@broadcom.com, florian.fainelli@broadcom.com, Justin Chen , Justin Chen , Al Cooper , Vinod Koul , Kishon Vijay Abraham I , linux-kernel@vger.kernel.org (open list:BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER) Subject: [PATCH 1/2] phy: usb: Turn off phy when port is in suspend Date: Thu, 15 Jun 2023 13:06:16 -0700 Message-Id: <1686859578-45242-2-git-send-email-justin.chen@broadcom.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1686859578-45242-1-git-send-email-justin.chen@broadcom.com> References: <1686859578-45242-1-git-send-email-justin.chen@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230615_130627_760271_A8323444 X-CRM114-Status: GOOD ( 18.33 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============4545129588530576642==" Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org --===============4545129588530576642== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000057212705fe309a2c" --00000000000057212705fe309a2c The COMMONONN bit turns off the PHY when the host controller puts it into suspend state. This can happen during the following... - Nothing is connected to the port - The host controller goes into low power mode whatever due to auto suspend or system suspend. With COMMONONN we also must unset U2_FREECLK_EXISTS since the UTMI clock is fed by the PHY. With these changes we see a power savings of ~12mW when port is in suspend. Reviewed-by: Florian Fainelli Signed-off-by: Justin Chen --- drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c | 15 +++++++++++++-- drivers/phy/broadcom/phy-brcm-usb-init.h | 8 ++++++++ 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c index 76cf4280d7ed..4c10cafded4e 100644 --- a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c +++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c @@ -59,6 +59,8 @@ #define USB_CTLR_TP_DIAG1_wake_MASK BIT(1) #define USB_CTRL_CTLR_CSHCR 0x50 #define USB_CTRL_CTLR_CSHCR_ctl_pme_en_MASK BIT(18) +#define USB_CTRL_P0_U2PHY_CFG1 0x68 +#define USB_CTRL_P0_U2PHY_CFG1_COMMONONN_MASK BIT(10) /* Register definitions for the USB_PHY block in 7211b0 */ #define USB_PHY_PLL_CTL 0x00 @@ -90,6 +92,8 @@ #define BDC_EC_AXIRDA_RTS_MASK GENMASK(31, 28) #define BDC_EC_AXIRDA_RTS_SHIFT 28 +#define USB_XHCI_GBL_GUSB2PHYCFG 0x100 +#define USB_XHCI_GBL_GUSB2PHYCFG_U2_FREECLK_EXISTS_MASK BIT(30) static void usb_mdio_write_7211b0(struct brcm_usb_init_params *params, uint8_t addr, uint16_t data) @@ -140,13 +144,17 @@ static void xhci_soft_reset(struct brcm_usb_init_params *params, int on_off) { void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + void __iomem *xhci_gbl = params->regs[BRCM_REGS_XHCI_GBL]; /* Assert reset */ - if (on_off) + if (on_off) { USB_CTRL_UNSET(ctrl, USB_PM, XHC_SOFT_RESETB); /* De-assert reset */ - else + } else { USB_CTRL_SET(ctrl, USB_PM, XHC_SOFT_RESETB); + /* Required for COMMONONN to be set */ + USB_XHCI_GBL_UNSET(xhci_gbl, GUSB2PHYCFG, U2_FREECLK_EXISTS); + } } static void usb_init_ipp(struct brcm_usb_init_params *params) @@ -320,6 +328,9 @@ static void usb_init_common_7216(struct brcm_usb_init_params *params) /* 1 millisecond - for USB clocks to settle down */ usleep_range(1000, 2000); + /* Disable PHY when port is suspended */ + USB_CTRL_SET(ctrl, P0_U2PHY_CFG1, COMMONONN); + usb_wake_enable_7216(params, false); usb_init_common(params); } diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.h b/drivers/phy/broadcom/phy-brcm-usb-init.h index f9fbf8fb80e5..c1a88f5cd4cd 100644 --- a/drivers/phy/broadcom/phy-brcm-usb-init.h +++ b/drivers/phy/broadcom/phy-brcm-usb-init.h @@ -34,6 +34,14 @@ enum brcmusb_reg_sel { brcm_usb_ctrl_unset(USB_CTRL_REG(base, reg), \ USB_CTRL_##reg##_##field##_MASK) +#define USB_XHCI_GBL_REG(base, reg) ((void __iomem *)base + USB_XHCI_GBL_##reg) +#define USB_XHCI_GBL_SET(base, reg, field) \ + brcm_usb_ctrl_set(USB_XHCI_GBL_REG(base, reg), \ + USB_XHCI_GBL_##reg##_##field##_MASK) +#define USB_XHCI_GBL_UNSET(base, reg, field) \ + brcm_usb_ctrl_unset(USB_XHCI_GBL_REG(base, reg), \ + USB_XHCI_GBL_##reg##_##field##_MASK) + struct brcm_usb_init_params; struct brcm_usb_init_ops { -- 2.7.4 --00000000000057212705fe309a2c Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; 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