From 8403e2ec8d4c759f821996d3bc43ca7c512ac9a0 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 25 Nov 2013 09:47:01 +0100 Subject: [PATCH] ahci: imx: Pull out the clock enable/disable calls The same code for enabling and disabling SATA clock was found in multiple places in the driver. Implement functions that enable/disable the SATA clock and use them in such places instead of duplicating the code. Signed-off-by: Marek Vasut Reviewed-by: Shawn Guo Cc: Richard Zhu Cc: Linux-IDE Signed-off-by: Tejun Heo --- drivers/ata/ahci_imx.c | 143 +++++++++++++++++++++-------------------- 1 file changed, 75 insertions(+), 68 deletions(-) diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c index 3e23e9941dad..6214411349de 100644 --- a/drivers/ata/ahci_imx.c +++ b/drivers/ata/ahci_imx.c @@ -47,6 +47,36 @@ static int ahci_imx_hotplug; module_param_named(hotplug, ahci_imx_hotplug, int, 0644); MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)"); +static int imx_sata_clock_enable(struct device *dev) +{ + struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); + int ret; + + ret = clk_prepare_enable(imxpriv->sata_ref_clk); + if (ret < 0) { + dev_err(dev, "prepare-enable sata_ref clock err:%d\n", ret); + return ret; + } + + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_MPLL_CLK_EN, + IMX6Q_GPR13_SATA_MPLL_CLK_EN); + + usleep_range(1000, 2000); + + return 0; +} + +static void imx_sata_clock_disable(struct device *dev) +{ + struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); + + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_MPLL_CLK_EN, + !IMX6Q_GPR13_SATA_MPLL_CLK_EN); + clk_disable_unprepare(imxpriv->sata_ref_clk); +} + static void ahci_imx_error_handler(struct ata_port *ap) { u32 reg_val; @@ -72,10 +102,7 @@ static void ahci_imx_error_handler(struct ata_port *ap) */ reg_val = readl(mmio + PORT_PHY_CTL); writel(reg_val | PORT_PHY_CTL_PDDQ_LOC, mmio + PORT_PHY_CTL); - regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, - IMX6Q_GPR13_SATA_MPLL_CLK_EN, - !IMX6Q_GPR13_SATA_MPLL_CLK_EN); - clk_disable_unprepare(imxpriv->sata_ref_clk); + imx_sata_clock_disable(ap->dev); imxpriv->no_device = true; } @@ -97,46 +124,9 @@ static int imx6q_sata_init(struct device *dev, void __iomem *mmio) unsigned int reg_val; struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); - imxpriv->gpr = - syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); - if (IS_ERR(imxpriv->gpr)) { - dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n"); - return PTR_ERR(imxpriv->gpr); - } - - ret = clk_prepare_enable(imxpriv->sata_ref_clk); - if (ret < 0) { - dev_err(dev, "prepare-enable sata_ref clock err:%d\n", ret); + ret = imx_sata_clock_enable(dev); + if (ret < 0) return ret; - } - - /* - * set PHY Paremeters, two steps to configure the GPR13, - * one write for rest of parameters, mask of first write - * is 0x07ffffff, and the other one write for setting - * the mpll_clk_en. - */ - regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK - | IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK - | IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK - | IMX6Q_GPR13_SATA_SPD_MODE_MASK - | IMX6Q_GPR13_SATA_MPLL_SS_EN - | IMX6Q_GPR13_SATA_TX_ATTEN_MASK - | IMX6Q_GPR13_SATA_TX_BOOST_MASK - | IMX6Q_GPR13_SATA_TX_LVL_MASK - | IMX6Q_GPR13_SATA_MPLL_CLK_EN - | IMX6Q_GPR13_SATA_TX_EDGE_RATE - , IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB - | IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M - | IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F - | IMX6Q_GPR13_SATA_SPD_MODE_3P0G - | IMX6Q_GPR13_SATA_MPLL_SS_EN - | IMX6Q_GPR13_SATA_TX_ATTEN_9_16 - | IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB - | IMX6Q_GPR13_SATA_TX_LVL_1_025_V); - regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN, - IMX6Q_GPR13_SATA_MPLL_CLK_EN); - usleep_range(100, 200); /* * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL, @@ -164,11 +154,7 @@ static int imx6q_sata_init(struct device *dev, void __iomem *mmio) static void imx6q_sata_exit(struct device *dev) { - struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); - - regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN, - !IMX6Q_GPR13_SATA_MPLL_CLK_EN); - clk_disable_unprepare(imxpriv->sata_ref_clk); + imx_sata_clock_disable(dev); } static int imx_ahci_suspend(struct device *dev) @@ -179,12 +165,8 @@ static int imx_ahci_suspend(struct device *dev) * If no_device is set, The CLKs had been gated off in the * initialization so don't do it again here. */ - if (!imxpriv->no_device) { - regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, - IMX6Q_GPR13_SATA_MPLL_CLK_EN, - !IMX6Q_GPR13_SATA_MPLL_CLK_EN); - clk_disable_unprepare(imxpriv->sata_ref_clk); - } + if (!imxpriv->no_device) + imx_sata_clock_disable(dev); return 0; } @@ -192,22 +174,12 @@ static int imx_ahci_suspend(struct device *dev) static int imx_ahci_resume(struct device *dev) { struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); - int ret; + int ret = 0; - if (!imxpriv->no_device) { - ret = clk_prepare_enable(imxpriv->sata_ref_clk); - if (ret < 0) { - dev_err(dev, "pre-enable sata_ref clock err:%d\n", ret); - return ret; - } - - regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, - IMX6Q_GPR13_SATA_MPLL_CLK_EN, - IMX6Q_GPR13_SATA_MPLL_CLK_EN); - usleep_range(1000, 2000); - } + if (!imxpriv->no_device) + ret = imx_sata_clock_enable(dev); - return 0; + return ret; } static struct ahci_platform_data imx6q_sata_pdata = { @@ -290,6 +262,41 @@ static int imx_ahci_probe(struct platform_device *pdev) ahci_dev->dma_mask = &ahci_dev->coherent_dma_mask; ahci_dev->of_node = dev->of_node; + imxpriv->gpr = + syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); + + if (IS_ERR(imxpriv->gpr)) { + dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n"); + ret = PTR_ERR(imxpriv->gpr); + goto err_out; + } + + /* + * Set PHY Paremeters, two steps to configure the GPR13, + * one write for rest of parameters, mask of first write + * is 0x07ffffff, and the other one write for setting + * the mpll_clk_en happens in imx_sata_clock_enable(). + */ + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK | + IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK | + IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK | + IMX6Q_GPR13_SATA_SPD_MODE_MASK | + IMX6Q_GPR13_SATA_MPLL_SS_EN | + IMX6Q_GPR13_SATA_TX_ATTEN_MASK | + IMX6Q_GPR13_SATA_TX_BOOST_MASK | + IMX6Q_GPR13_SATA_TX_LVL_MASK | + IMX6Q_GPR13_SATA_MPLL_CLK_EN | + IMX6Q_GPR13_SATA_TX_EDGE_RATE, + IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB | + IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | + IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | + IMX6Q_GPR13_SATA_SPD_MODE_3P0G | + IMX6Q_GPR13_SATA_MPLL_SS_EN | + IMX6Q_GPR13_SATA_TX_ATTEN_9_16 | + IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB | + IMX6Q_GPR13_SATA_TX_LVL_1_025_V); + ret = platform_device_add_resources(ahci_pdev, res, 2); if (ret) goto err_out; -- 2.20.1