From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59462C49EA6 for ; Thu, 24 Jun 2021 18:41:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 42573613FB for ; Thu, 24 Jun 2021 18:41:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232666AbhFXSn5 (ORCPT ); Thu, 24 Jun 2021 14:43:57 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:41510 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232607AbhFXSnx (ORCPT ); Thu, 24 Jun 2021 14:43:53 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 15OIfK7f028665; Thu, 24 Jun 2021 13:41:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1624560080; bh=ojmbFexRdMH8mKwkR76UTDcC9muBuXEes+AfsG/jM/k=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=FM9mMxv55HgTfKWR+oCMaGs23NyPzxkP9KWe7Cr5hFxRRxX7orESk1v4K/JScoraO gsaY8u4AYvpdOZ6/aSw6UhKFbA3mgs1Tkfdjidhms508r/qHBvTY9WmVJ+1rMB2TGr v/IX1bvcgmYo2ZFO3mk28iUEV3cO31dXKNguBVxw= Received: from DLEE105.ent.ti.com (dlee105.ent.ti.com [157.170.170.35]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 15OIfKJ6107265 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 13:41:20 -0500 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 13:41:20 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 13:41:20 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OIf9Hx041395; Thu, 24 Jun 2021 13:41:17 -0500 From: Pratyush Yadav To: Vinod Koul CC: Nikhil Devshatwar , Tomi Valkeinen , Laurent Pinchart , Paul Kocialkowski , Vignesh Raghavendra , Pratyush Yadav , Chunfeng Yun , Kishon Vijay Abraham I , Peter Chen , , Subject: [PATCH v3 2/7] phy: cdns-dphy: Prepare for Rx support Date: Fri, 25 Jun 2021 00:11:03 +0530 Message-ID: <20210624184108.21312-3-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624184108.21312-1-p.yadav@ti.com> References: <20210624184108.21312-1-p.yadav@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Rx programming sequence differs from the Tx programming sequence. Currently only Tx mode is supported. Move all the Tx related parts into a set of Tx-specific hooks that are then called by the main PHY framework hooks. This way when Rx support is added all that is needed to be done is to plug in the Rx hooks. The clocks "psm" and "pll_ref" are not used by the Rx path so make them optional in the probe and then check if they exist in the power_on() hook. Signed-off-by: Pratyush Yadav --- (no changes since v1) drivers/phy/cadence/cdns-dphy.c | 140 ++++++++++++++++++++++++-------- 1 file changed, 104 insertions(+), 36 deletions(-) diff --git a/drivers/phy/cadence/cdns-dphy.c b/drivers/phy/cadence/cdns-dphy.c index ba042e39cfaf..8656f2102a91 100644 --- a/drivers/phy/cadence/cdns-dphy.c +++ b/drivers/phy/cadence/cdns-dphy.c @@ -75,6 +75,11 @@ struct cdns_dphy; struct cdns_dphy_ops { int (*probe)(struct cdns_dphy *dphy); void (*remove)(struct cdns_dphy *dphy); + int (*power_on)(struct cdns_dphy *dphy); + int (*power_off)(struct cdns_dphy *dphy); + int (*validate)(struct cdns_dphy *dphy, enum phy_mode mode, int submode, + union phy_configure_opts *opts); + int (*configure)(struct cdns_dphy *dphy, union phy_configure_opts *opts); void (*set_psm_div)(struct cdns_dphy *dphy, u8 div); void (*set_clk_lane_cfg)(struct cdns_dphy *dphy, enum cdns_dphy_clk_lane_cfg cfg); @@ -86,12 +91,18 @@ struct cdns_dphy_ops { struct cdns_dphy { struct cdns_dphy_cfg cfg; void __iomem *regs; + struct device *dev; struct clk *psm_clk; struct clk *pll_ref_clk; const struct cdns_dphy_ops *ops; struct phy *phy; }; +struct cdns_dphy_driver_data { + const struct cdns_dphy_ops *tx; + const struct cdns_dphy_ops *rx; +}; + static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy, struct cdns_dphy_cfg *cfg, struct phy_configure_opts_mipi_dphy *opts, @@ -199,20 +210,9 @@ static void cdns_dphy_ref_set_psm_div(struct cdns_dphy *dphy, u8 div) dphy->regs + DPHY_PSM_CFG); } -/* - * This is the reference implementation of DPHY hooks. Specific integration of - * this IP may have to re-implement some of them depending on how they decided - * to wire things in the SoC. - */ -static const struct cdns_dphy_ops ref_dphy_ops = { - .get_wakeup_time_ns = cdns_dphy_ref_get_wakeup_time_ns, - .set_pll_cfg = cdns_dphy_ref_set_pll_cfg, - .set_psm_div = cdns_dphy_ref_set_psm_div, -}; - -static int cdns_dphy_config_from_opts(struct phy *phy, - struct phy_configure_opts_mipi_dphy *opts, - struct cdns_dphy_cfg *cfg) +static int cdns_dphy_tx_config_from_opts(struct phy *phy, + struct phy_configure_opts_mipi_dphy *opts, + struct cdns_dphy_cfg *cfg) { struct cdns_dphy *dphy = phy_get_drvdata(phy); unsigned int dsi_hfp_ext = 0; @@ -232,24 +232,13 @@ static int cdns_dphy_config_from_opts(struct phy *phy, return 0; } -static int cdns_dphy_validate(struct phy *phy, enum phy_mode mode, int submode, - union phy_configure_opts *opts) +static int cdns_dphy_tx_configure(struct cdns_dphy *dphy, + union phy_configure_opts *opts) { struct cdns_dphy_cfg cfg = { 0 }; - - if (mode != PHY_MODE_MIPI_DPHY) - return -EINVAL; - - return cdns_dphy_config_from_opts(phy, &opts->mipi_dphy, &cfg); -} - -static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts) -{ - struct cdns_dphy *dphy = phy_get_drvdata(phy); - struct cdns_dphy_cfg cfg = { 0 }; int ret; - ret = cdns_dphy_config_from_opts(phy, &opts->mipi_dphy, &cfg); + ret = cdns_dphy_tx_config_from_opts(dphy->phy, &opts->mipi_dphy, &cfg); if (ret) return ret; @@ -279,9 +268,21 @@ static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts) return 0; } -static int cdns_dphy_power_on(struct phy *phy) +static int cdns_dphy_tx_validate(struct cdns_dphy *dphy, enum phy_mode mode, + int submode, union phy_configure_opts *opts) { - struct cdns_dphy *dphy = phy_get_drvdata(phy); + struct cdns_dphy_cfg cfg = { 0 }; + + if (submode != PHY_MIPI_DPHY_SUBMODE_TX) + return -EINVAL; + + return cdns_dphy_tx_config_from_opts(dphy->phy, &opts->mipi_dphy, &cfg); +} + +static int cdns_dphy_tx_power_on(struct cdns_dphy *dphy) +{ + if (!dphy->psm_clk || !dphy->pll_ref_clk) + return -EINVAL; clk_prepare_enable(dphy->psm_clk); clk_prepare_enable(dphy->pll_ref_clk); @@ -293,16 +294,77 @@ static int cdns_dphy_power_on(struct phy *phy) return 0; } -static int cdns_dphy_power_off(struct phy *phy) +static int cdns_dphy_tx_power_off(struct cdns_dphy *dphy) { - struct cdns_dphy *dphy = phy_get_drvdata(phy); - clk_disable_unprepare(dphy->pll_ref_clk); clk_disable_unprepare(dphy->psm_clk); return 0; } +static const struct cdns_dphy_ops tx_ref_dphy_ops = { + .power_on = cdns_dphy_tx_power_on, + .power_off = cdns_dphy_tx_power_off, + .validate = cdns_dphy_tx_validate, + .configure = cdns_dphy_tx_configure, + .get_wakeup_time_ns = cdns_dphy_ref_get_wakeup_time_ns, + .set_pll_cfg = cdns_dphy_ref_set_pll_cfg, + .set_psm_div = cdns_dphy_ref_set_psm_div, +}; + +/* + * This is the reference implementation of DPHY hooks. Specific integration of + * this IP may have to re-implement some of them depending on how they decided + * to wire things in the SoC. + */ +static const struct cdns_dphy_driver_data ref_dphy_ops = { + .tx = &tx_ref_dphy_ops, +}; + +static int cdns_dphy_validate(struct phy *phy, enum phy_mode mode, int submode, + union phy_configure_opts *opts) +{ + struct cdns_dphy *dphy = phy_get_drvdata(phy); + + if (mode != PHY_MODE_MIPI_DPHY) + return -EINVAL; + + if (dphy->ops->validate) + return dphy->ops->validate(dphy, mode, submode, opts); + + return 0; +} + +static int cdns_dphy_power_on(struct phy *phy) +{ + struct cdns_dphy *dphy = phy_get_drvdata(phy); + + if (dphy->ops->power_on) + return dphy->ops->power_on(dphy); + + return 0; +} + +static int cdns_dphy_power_off(struct phy *phy) +{ + struct cdns_dphy *dphy = phy_get_drvdata(phy); + + if (dphy->ops->power_off) + return dphy->ops->power_off(dphy); + + return 0; +} + +static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts) +{ + struct cdns_dphy *dphy = phy_get_drvdata(phy); + + if (dphy->ops->configure) + return dphy->ops->configure(dphy, opts); + + return 0; +} + static const struct phy_ops cdns_dphy_ops = { .configure = cdns_dphy_configure, .validate = cdns_dphy_validate, @@ -314,14 +376,20 @@ static int cdns_dphy_probe(struct platform_device *pdev) { struct phy_provider *phy_provider; struct cdns_dphy *dphy; + const struct cdns_dphy_driver_data *ddata; int ret; dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL); if (!dphy) return -ENOMEM; dev_set_drvdata(&pdev->dev, dphy); + dphy->dev = &pdev->dev; - dphy->ops = of_device_get_match_data(&pdev->dev); + ddata = of_device_get_match_data(&pdev->dev); + if (!ddata) + return -EINVAL; + + dphy->ops = ddata->tx; if (!dphy->ops) return -EINVAL; @@ -329,11 +397,11 @@ static int cdns_dphy_probe(struct platform_device *pdev) if (IS_ERR(dphy->regs)) return PTR_ERR(dphy->regs); - dphy->psm_clk = devm_clk_get(&pdev->dev, "psm"); + dphy->psm_clk = devm_clk_get_optional(dphy->dev, "psm"); if (IS_ERR(dphy->psm_clk)) return PTR_ERR(dphy->psm_clk); - dphy->pll_ref_clk = devm_clk_get(&pdev->dev, "pll_ref"); + dphy->pll_ref_clk = devm_clk_get_optional(dphy->dev, "pll_ref"); if (IS_ERR(dphy->pll_ref_clk)) return PTR_ERR(dphy->pll_ref_clk); -- 2.30.0