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b=rANmVIP9H9py4GgL+8JuHyTwvd3jcMhNprNv8Iken9M4MRx3Gb/XR2YI9TPAOkU0vfC5M3Ucs8RKaVTW0a1/4AWd96bzrrmcK5KnmwsdQZEy90A4SQc/IFhWp5K4Oh/o8PBfkvCBPuSdZqD1GrsW02+pkcIEWp/jknc3ocPv7fI= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) by DU0PR04MB9635.eurprd04.prod.outlook.com (2603:10a6:10:31f::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7068.27; Thu, 7 Dec 2023 19:34:55 +0000 Received: from AM6PR04MB4838.eurprd04.prod.outlook.com ([fe80::95f5:5118:258f:ee40]) by AM6PR04MB4838.eurprd04.prod.outlook.com ([fe80::95f5:5118:258f:ee40%6]) with mapi id 15.20.7068.026; Thu, 7 Dec 2023 19:34:55 +0000 From: Frank Li To: helgaas@kernel.org, manivannan.sadhasivam@linaro.org Cc: Frank.li@nxp.com, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: [PATCH v2 1/9] PCI: imx6: Simplify clock handling by using HAS_CLK_* bitmask Date: Thu, 7 Dec 2023 14:34:22 -0500 Message-Id: <20231207193430.431994-2-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231207193430.431994-1-Frank.Li@nxp.com> References: <20231207193430.431994-1-Frank.Li@nxp.com> X-ClientProxiedBy: SJ0PR03CA0348.namprd03.prod.outlook.com (2603:10b6:a03:39c::23) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|DU0PR04MB9635:EE_ X-MS-Office365-Filtering-Correlation-Id: a7555e79-986e-43bd-0a8c-08dbf75b975e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a7555e79-986e-43bd-0a8c-08dbf75b975e X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB4838.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Dec 2023 19:34:55.8291 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: I60skOHlFAz/6xk0PcXx1eixaze695IF22+r3zcIQDGJJ+EUTlYp20NMVHxSCUol0qx7G8voiuT5ZjS1IznkkA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR04MB9635 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231207_113457_499306_346CA723 X-CRM114-Status: GOOD ( 17.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Refactors the clock handling logic in the imx6 PCI driver by adding HAS_CLK_* bitmask define for drvdata::flags . Simplifies the code and makes it more maintainable, as future additions of SOC support will only require straightforward changes. The drvdata::flags and a bitmask ensures a cleaner and more scalable switch-case structure for handling clocks. Signed-off-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 84 +++++++++++++-------------- 1 file changed, 42 insertions(+), 42 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 74703362aeec7..8a9b527934f80 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -60,6 +60,10 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_IMX6_PHY BIT(0) #define IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE BIT(1) #define IMX6_PCIE_FLAG_SUPPORTS_SUSPEND BIT(2) +#define IMX6_PCIE_FLAG_HAS_CLK_INBOUND_AXI BIT(3) +#define IMX6_PCIE_FLAG_HAS_CLK_AUX BIT(4) + +#define imx6_check_flag(pci, val) (pci->drvdata->flags & val) struct imx6_pcie_drvdata { enum imx6_pcie_variants variant; @@ -550,19 +554,23 @@ static int imx6_pcie_attach_pd(struct device *dev) static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) { - struct dw_pcie *pci = imx6_pcie->pci; - struct device *dev = pci->dev; unsigned int offset; int ret = 0; - switch (imx6_pcie->drvdata->variant) { - case IMX6SX: + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_CLK_INBOUND_AXI)) { ret = clk_prepare_enable(imx6_pcie->pcie_inbound_axi); - if (ret) { - dev_err(dev, "unable to enable pcie_axi clock\n"); - break; - } + if (ret) + return ret; + } + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_CLK_AUX)) { + ret = clk_prepare_enable(imx6_pcie->pcie_aux); + if (ret) + return ret; + } + + switch (imx6_pcie->drvdata->variant) { + case IMX6SX: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_TEST_POWERDOWN, 0); break; @@ -589,12 +597,6 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) case IMX8MQ_EP: case IMX8MP: case IMX8MP_EP: - ret = clk_prepare_enable(imx6_pcie->pcie_aux); - if (ret) { - dev_err(dev, "unable to enable pcie_aux clock\n"); - break; - } - offset = imx6_pcie_grp_offset(imx6_pcie); /* * Set the over ride low and enabled @@ -614,10 +616,13 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie) { - switch (imx6_pcie->drvdata->variant) { - case IMX6SX: + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_CLK_INBOUND_AXI)) clk_disable_unprepare(imx6_pcie->pcie_inbound_axi); - break; + + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_CLK_AUX)) + clk_disable_unprepare(imx6_pcie->pcie_aux); + + switch (imx6_pcie->drvdata->variant) { case IMX6QP: case IMX6Q: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, @@ -631,14 +636,6 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie) IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL); break; - case IMX8MM: - case IMX8MM_EP: - case IMX8MQ: - case IMX8MQ_EP: - case IMX8MP: - case IMX8MP_EP: - clk_disable_unprepare(imx6_pcie->pcie_aux); - break; default: break; } @@ -1316,21 +1313,21 @@ static int imx6_pcie_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie), "pcie clock source missing or invalid\n"); - switch (imx6_pcie->drvdata->variant) { - case IMX6SX: - imx6_pcie->pcie_inbound_axi = devm_clk_get(dev, - "pcie_inbound_axi"); + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_CLK_INBOUND_AXI)) { + imx6_pcie->pcie_inbound_axi = devm_clk_get(dev, "pcie_inbound_axi"); if (IS_ERR(imx6_pcie->pcie_inbound_axi)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_inbound_axi), - "pcie_inbound_axi clock missing or invalid\n"); - break; - case IMX8MQ: - case IMX8MQ_EP: + dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_inbound_axi), + "pcie_inbound_axi clock missing or invalid\n"); + } + + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_CLK_AUX)) { imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux"); if (IS_ERR(imx6_pcie->pcie_aux)) return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux), "pcie_aux clock source missing or invalid\n"); - fallthrough; + } + + switch (imx6_pcie->drvdata->variant) { case IMX7D: if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) imx6_pcie->controller_id = 1; @@ -1353,10 +1350,6 @@ static int imx6_pcie_probe(struct platform_device *pdev) case IMX8MM_EP: case IMX8MP: case IMX8MP_EP: - imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux"); - if (IS_ERR(imx6_pcie->pcie_aux)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux), - "pcie_aux clock source missing or invalid\n"); imx6_pcie->apps_reset = devm_reset_control_get_exclusive(dev, "apps"); if (IS_ERR(imx6_pcie->apps_reset)) @@ -1482,7 +1475,8 @@ static const struct imx6_pcie_drvdata drvdata[] = { .variant = IMX6SX, .flags = IMX6_PCIE_FLAG_IMX6_PHY | IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE | - IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, + IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | + IMX6_PCIE_FLAG_HAS_CLK_INBOUND_AXI, .gpr = "fsl,imx6q-iomuxc-gpr", }, [IMX6QP] = { @@ -1500,30 +1494,36 @@ static const struct imx6_pcie_drvdata drvdata[] = { }, [IMX8MQ] = { .variant = IMX8MQ, + .flags = IMX6_PCIE_FLAG_HAS_CLK_AUX, .gpr = "fsl,imx8mq-iomuxc-gpr", }, [IMX8MM] = { .variant = IMX8MM, - .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, + .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | + IMX6_PCIE_FLAG_HAS_CLK_AUX, .gpr = "fsl,imx8mm-iomuxc-gpr", }, [IMX8MP] = { .variant = IMX8MP, - .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, + .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | + IMX6_PCIE_FLAG_HAS_CLK_AUX, .gpr = "fsl,imx8mp-iomuxc-gpr", }, [IMX8MQ_EP] = { .variant = IMX8MQ_EP, + .flags = IMX6_PCIE_FLAG_HAS_CLK_AUX, .mode = DW_PCIE_EP_TYPE, .gpr = "fsl,imx8mq-iomuxc-gpr", }, [IMX8MM_EP] = { .variant = IMX8MM_EP, + .flags = IMX6_PCIE_FLAG_HAS_CLK_AUX, .mode = DW_PCIE_EP_TYPE, .gpr = "fsl,imx8mm-iomuxc-gpr", }, [IMX8MP_EP] = { .variant = IMX8MP_EP, + .flags = IMX6_PCIE_FLAG_HAS_CLK_AUX, .mode = DW_PCIE_EP_TYPE, .gpr = "fsl,imx8mp-iomuxc-gpr", },