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    Subject[PATCH 3.12 097/144] ahci: imx: Explicitly clear IMX6Q_GPR13_SATA_MPLL_CLK_EN
    Date
    3.12-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Marek Vasut <marex@denx.de>

    commit 10becdb402af4fd4808a0491a726b96128c41076 upstream.

    We must clear this IMX6Q_GPR13_SATA_MPLL_CLK_EN bit on i.MX6Q, otherwise
    Linux will fail to find the attached drive on some boards.

    This entire fix was:
    Reported-by: Eric Nelson <eric.nelson@boundarydevices.com>

    Signed-off-by: Marek Vasut <marex@denx.de>
    Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
    Cc: Richard Zhu <r65037@freescale.com>
    Cc: Linux-IDE <linux-ide@vger.kernel.org>
    Signed-off-by: Tejun Heo <tj@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/ata/ahci_imx.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/drivers/ata/ahci_imx.c
    +++ b/drivers/ata/ahci_imx.c
    @@ -60,7 +60,7 @@ static int imx6q_sata_init(struct device
    /*
    * 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
    + * 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
    @@ -71,6 +71,7 @@ static int imx6q_sata_init(struct device
    | 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



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