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Commit 10becdb4 authored by Marek Vasut's avatar Marek Vasut Committed by Tejun Heo
Browse files

ahci: imx: Explicitly clear IMX6Q_GPR13_SATA_MPLL_CLK_EN 



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: default avatarEric Nelson <eric.nelson@boundarydevices.com>

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Reviewed-by: default avatarShawn Guo <shawn.guo@linaro.org>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Linux-IDE <linux-ide@vger.kernel.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
parent 87809942

drivers/ata/ahci_imx.c

+2 −1
Original line number Diff line number Diff line
@@ -113,7 +113,7 @@ static int imx6q_sata_init(struct device *dev, void __iomem *mmio) 
	/*

	 * 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
@@ -124,6 +124,7 @@ static int imx6q_sata_init(struct device *dev, void __iomem *mmio) 
			| 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