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Thu, 16 Apr 2020 21:23:11 -0800 Received: from mtkmbs08n2.mediatek.inc (172.21.101.56) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 16 Apr 2020 22:23:14 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 17 Apr 2020 13:23:11 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 17 Apr 2020 13:23:12 +0800 From: Macpaul Lin To: Min Guo , Chunfeng Yun , Kishon Vijay Abraham I , Rob Herring , Matthias Brugger , , , , Subject: [PATCH 2/2] phy: phy-mtk-tphy: introduce force_vbus for u2 phy Date: Fri, 17 Apr 2020 13:23:06 +0800 Message-ID: <1587100986-3104-2-git-send-email-macpaul.lin@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1587100986-3104-1-git-send-email-macpaul.lin@mediatek.com> References: <1587100986-3104-1-git-send-email-macpaul.lin@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: E815C42225B82684929207EFF6F91564BF86715E507A584A4955B6A5F960DCE12000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200416_222328_363387_70E06105 X-CRM114-Status: GOOD ( 11.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Macpaul Lin , Macpaul Lin , Mediatek WSD Upstream Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org For some platforms, they don't have vbus pin connection between usb phy and mac. Hence we need to control force_vbus related registers to keep hardware works normal. This patch add corresponding behavior of force vbus in u2 phy related functions. Signed-off-by: Macpaul Lin --- drivers/phy/mediatek/phy-mtk-tphy.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c index cdbcc49f7115..46f0fea175e5 100644 --- a/drivers/phy/mediatek/phy-mtk-tphy.c +++ b/drivers/phy/mediatek/phy-mtk-tphy.c @@ -99,6 +99,7 @@ #define U3P_U2PHYDTM1 0x06C #define P2C_RG_UART_EN BIT(16) +#define P2C_FORCE_VBUSVALID BIT(13) #define P2C_FORCE_IDDIG BIT(9) #define P2C_RG_VBUSVALID BIT(5) #define P2C_RG_SESSEND BIT(4) @@ -318,6 +319,7 @@ struct mtk_tphy { int nphys; int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */ int src_coef; /* coefficient for slew rate calibrate */ + bool force_vbus; }; static void hs_slew_rate_calibrate(struct mtk_tphy *tphy, @@ -611,13 +613,20 @@ static void u2_phy_instance_set_mode(struct mtk_tphy *tphy, switch (mode) { case PHY_MODE_USB_DEVICE: tmp |= P2C_FORCE_IDDIG | P2C_RG_IDDIG; + if (tphy->force_vbus) + tmp |= P2C_RG_VBUSVALID | P2C_FORCE_VBUSVALID; break; case PHY_MODE_USB_HOST: tmp |= P2C_FORCE_IDDIG; - tmp &= ~P2C_RG_IDDIG; + if (tphy->force_vbus) + tmp &= ~(P2C_RG_VBUSVALID | P2C_FORCE_VBUSVALID); + else + tmp &= ~P2C_RG_IDDIG; break; case PHY_MODE_USB_OTG: tmp &= ~(P2C_FORCE_IDDIG | P2C_RG_IDDIG); + if (tphy->force_vbus) + tmp &= ~(P2C_RG_VBUSVALID | P2C_FORCE_VBUSVALID); break; default: return; @@ -1187,6 +1196,11 @@ static int mtk_tphy_probe(struct platform_device *pdev) retval = PTR_ERR(instance->da_ref_clk); goto put_child; } + + /* + * On some platform, vbus is dis-connected between PHY and MAC. + */ + tphy->force_vbus = device_property_read_bool(dev, "force_vbus"); } provider = devm_of_phy_provider_register(dev, mtk_phy_xlate); -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel