From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 737071B87E9; Tue, 12 Aug 2025 19:15:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755026154; cv=none; b=UQekfkpWB80YR0nAJfPdv0unSv6E4sW127tF0xrlCVgPWAJvtPYtVAtUsw+X8zjETCnrowqM6HZBbnOvO1WHP26i8Essb02Q2tmLqihiewE+q90knEFC9uf9p6tFaOF7m/MiwKzvoauAAkj+CnwP8SIwE9Iq3X9jw2KwBoocYOc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755026154; c=relaxed/simple; bh=/LiMFLrIBmabOwrhkzFcc9/xBENsIT8AU08UG0WFnqA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aml9+K9DRdUABGBVTZHwtvTaEmnVZEihFsm8JJpuUdljcQjMwAlp2wj388rjmOG3zElJxf/WnJ0A8pAxVWV6od4NLp/3QMmbZT7tJVUVyFa5Wz7nSbRlu3/u8mVcmZp7pH9XeYU/Rv/2QQPPw91v5sD1TDoQseL46Nx1AnXdCgc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Ih7e3VbJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Ih7e3VbJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ECDCFC4CEF0; Tue, 12 Aug 2025 19:15:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755026154; bh=/LiMFLrIBmabOwrhkzFcc9/xBENsIT8AU08UG0WFnqA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ih7e3VbJ4JUZKL0DpM54eEvGVFrXtVANxYwK+Co/UpfRLcqVuT/08RWYnkNwjmXvK G+Yf4t9lOsMy7BshQ4td+BBeOCZKu/vJky2/SsIzQC44yWplBHcIvKE9ujFXB3qS97 LVK9pRlr1nUw9OFgDKhuI17W8ItsAsra17Ptgar0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Konrad Dybcio , Neil Armstrong , Luca Weiss , Dmitry Baryshkov , Abel Vesa , Vinod Koul , Sasha Levin Subject: [PATCH 6.15 251/480] phy: qualcomm: phy-qcom-eusb2-repeater: Dont zero-out registers Date: Tue, 12 Aug 2025 19:47:39 +0200 Message-ID: <20250812174407.805008582@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250812174357.281828096@linuxfoundation.org> References: <20250812174357.281828096@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luca Weiss [ Upstream commit 31bc94de76026c527f82c238f414539a14f0f3e6 ] Zeroing out registers does not happen in the downstream kernel, and will "tune" the repeater in surely unexpected ways since most registers don't have a reset value of 0x0. Stop doing that and instead just set the registers that are in the init sequence (though long term I don't think there's actually PMIC-specific init sequences, there's board specific tuning, but that's a story for another day). Fixes: 99a517a582fc ("phy: qualcomm: phy-qcom-eusb2-repeater: Zero out untouched tuning regs") Reviewed-by: Konrad Dybcio Reviewed-by: Neil Armstrong Signed-off-by: Luca Weiss Reviewed-by: Dmitry Baryshkov Reviewed-by: Abel Vesa Link: https://lore.kernel.org/r/20250617-eusb2-repeater-tuning-v2-2-ed6c484f18ee@fairphone.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- .../phy/qualcomm/phy-qcom-eusb2-repeater.c | 87 +++++++------------ 1 file changed, 32 insertions(+), 55 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c index 6bd1b3c75c77..d7493c2294ef 100644 --- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c +++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c @@ -37,32 +37,13 @@ #define EUSB2_TUNE_EUSB_EQU 0x5A #define EUSB2_TUNE_EUSB_HS_COMP_CUR 0x5B -enum eusb2_reg_layout { - TUNE_EUSB_HS_COMP_CUR, - TUNE_EUSB_EQU, - TUNE_EUSB_SLEW, - TUNE_USB2_HS_COMP_CUR, - TUNE_USB2_PREEM, - TUNE_USB2_EQU, - TUNE_USB2_SLEW, - TUNE_SQUELCH_U, - TUNE_HSDISC, - TUNE_RES_FSDIF, - TUNE_IUSB2, - TUNE_USB2_CROSSOVER, - NUM_TUNE_FIELDS, - - FORCE_VAL_5 = NUM_TUNE_FIELDS, - FORCE_EN_5, - - EN_CTL1, - - RPTR_STATUS, - LAYOUT_SIZE, +struct eusb2_repeater_init_tbl_reg { + unsigned int reg; + unsigned int value; }; struct eusb2_repeater_cfg { - const u32 *init_tbl; + const struct eusb2_repeater_init_tbl_reg *init_tbl; int init_tbl_num; const char * const *vreg_list; int num_vregs; @@ -82,16 +63,16 @@ static const char * const pm8550b_vreg_l[] = { "vdd18", "vdd3", }; -static const u32 pm8550b_init_tbl[NUM_TUNE_FIELDS] = { - [TUNE_IUSB2] = 0x8, - [TUNE_SQUELCH_U] = 0x3, - [TUNE_USB2_PREEM] = 0x5, +static const struct eusb2_repeater_init_tbl_reg pm8550b_init_tbl[] = { + { EUSB2_TUNE_IUSB2, 0x8 }, + { EUSB2_TUNE_SQUELCH_U, 0x3 }, + { EUSB2_TUNE_USB2_PREEM, 0x5 }, }; -static const u32 smb2360_init_tbl[NUM_TUNE_FIELDS] = { - [TUNE_IUSB2] = 0x5, - [TUNE_SQUELCH_U] = 0x3, - [TUNE_USB2_PREEM] = 0x2, +static const struct eusb2_repeater_init_tbl_reg smb2360_init_tbl[] = { + { EUSB2_TUNE_IUSB2, 0x5 }, + { EUSB2_TUNE_SQUELCH_U, 0x3 }, + { EUSB2_TUNE_USB2_PREEM, 0x2 }, }; static const struct eusb2_repeater_cfg pm8550b_eusb2_cfg = { @@ -129,17 +110,10 @@ static int eusb2_repeater_init(struct phy *phy) struct eusb2_repeater *rptr = phy_get_drvdata(phy); struct device_node *np = rptr->dev->of_node; struct regmap *regmap = rptr->regmap; - const u32 *init_tbl = rptr->cfg->init_tbl; - u8 tune_usb2_preem = init_tbl[TUNE_USB2_PREEM]; - u8 tune_hsdisc = init_tbl[TUNE_HSDISC]; - u8 tune_iusb2 = init_tbl[TUNE_IUSB2]; u32 base = rptr->base; - u32 val; + u32 poll_val; int ret; - - of_property_read_u8(np, "qcom,tune-usb2-amplitude", &tune_iusb2); - of_property_read_u8(np, "qcom,tune-usb2-disc-thres", &tune_hsdisc); - of_property_read_u8(np, "qcom,tune-usb2-preem", &tune_usb2_preem); + u8 val; ret = regulator_bulk_enable(rptr->cfg->num_vregs, rptr->vregs); if (ret) @@ -147,21 +121,24 @@ static int eusb2_repeater_init(struct phy *phy) regmap_write(regmap, base + EUSB2_EN_CTL1, EUSB2_RPTR_EN); - regmap_write(regmap, base + EUSB2_TUNE_EUSB_HS_COMP_CUR, init_tbl[TUNE_EUSB_HS_COMP_CUR]); - regmap_write(regmap, base + EUSB2_TUNE_EUSB_EQU, init_tbl[TUNE_EUSB_EQU]); - regmap_write(regmap, base + EUSB2_TUNE_EUSB_SLEW, init_tbl[TUNE_EUSB_SLEW]); - regmap_write(regmap, base + EUSB2_TUNE_USB2_HS_COMP_CUR, init_tbl[TUNE_USB2_HS_COMP_CUR]); - regmap_write(regmap, base + EUSB2_TUNE_USB2_EQU, init_tbl[TUNE_USB2_EQU]); - regmap_write(regmap, base + EUSB2_TUNE_USB2_SLEW, init_tbl[TUNE_USB2_SLEW]); - regmap_write(regmap, base + EUSB2_TUNE_SQUELCH_U, init_tbl[TUNE_SQUELCH_U]); - regmap_write(regmap, base + EUSB2_TUNE_RES_FSDIF, init_tbl[TUNE_RES_FSDIF]); - regmap_write(regmap, base + EUSB2_TUNE_USB2_CROSSOVER, init_tbl[TUNE_USB2_CROSSOVER]); - - regmap_write(regmap, base + EUSB2_TUNE_USB2_PREEM, tune_usb2_preem); - regmap_write(regmap, base + EUSB2_TUNE_HSDISC, tune_hsdisc); - regmap_write(regmap, base + EUSB2_TUNE_IUSB2, tune_iusb2); - - ret = regmap_read_poll_timeout(regmap, base + EUSB2_RPTR_STATUS, val, val & RPTR_OK, 10, 5); + /* Write registers from init table */ + for (int i = 0; i < rptr->cfg->init_tbl_num; i++) + regmap_write(regmap, base + rptr->cfg->init_tbl[i].reg, + rptr->cfg->init_tbl[i].value); + + /* Override registers from devicetree values */ + if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &val)) + regmap_write(regmap, base + EUSB2_TUNE_USB2_PREEM, val); + + if (!of_property_read_u8(np, "qcom,tune-usb2-disc-thres", &val)) + regmap_write(regmap, base + EUSB2_TUNE_HSDISC, val); + + if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &val)) + regmap_write(regmap, base + EUSB2_TUNE_IUSB2, val); + + /* Wait for status OK */ + ret = regmap_read_poll_timeout(regmap, base + EUSB2_RPTR_STATUS, poll_val, + poll_val & RPTR_OK, 10, 5); if (ret) dev_err(rptr->dev, "initialization timed-out\n"); -- 2.39.5