Hi,
Marek Vasut wrote:
> 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 <marex@xxxxxxx>
> Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Cc: Richard Zhu <r65037@xxxxxxxxxxxxx>
> Cc: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Linux-IDE <linux-ide@xxxxxxxxxxxxxxx>
> ---
> drivers/ata/ahci_imx.c | 133 ++++++++++++++++++++++++++++---------------------
> 1 file changed, 75 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
> index ae2d73f..c7ee505 100644
> --- a/drivers/ata/ahci_imx.c
> +++ b/drivers/ata/ahci_imx.c
> @@ -47,6 +47,73 @@ 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, bool config)
> +{
> + struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
> + int ret;
> +
> + 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);
> + return ret;
> + }
> +
> + /*
> + * set PHY Paremeters, two steps to configure the GPR13,
> + * one write for rest of parameters, mask of first write
> + * is 0x07fffffd, and the other one write for setting
> + * the mpll_clk_en.
> + */
> + if (config) {
> + 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_TX_EDGE_RATE
> + , IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB
>
I would prefer the comma to be at the end of the line where one usually
looks for it. Also '#define'ing constants for these bitmasks would make
the code more readable.
Lothar Waßmann
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