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    Subject[PATCH 5/9] ata: ahci_brcm: Allow optional reset controller to be used
    Date
    On BCM63138, we need to reset the AHCI core prior to start utilizing it,
    grab the reset controller device cookie and do that.

    Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
    ---
    drivers/ata/ahci_brcm.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
    index f3d557777d82..d535e87151dc 100644
    --- a/drivers/ata/ahci_brcm.c
    +++ b/drivers/ata/ahci_brcm.c
    @@ -25,6 +25,7 @@
    #include <linux/module.h>
    #include <linux/of.h>
    #include <linux/platform_device.h>
    +#include <linux/reset.h>
    #include <linux/string.h>

    #include "ahci.h"
    @@ -94,6 +95,7 @@ struct brcm_ahci_priv {
    u32 port_mask;
    u32 quirks;
    enum brcm_ahci_version version;
    + struct reset_control *rcdev;
    };

    static inline u32 brcm_sata_readreg(void __iomem *addr)
    @@ -411,6 +413,10 @@ static int brcm_ahci_probe(struct platform_device *pdev)
    if (IS_ERR(priv->top_ctrl))
    return PTR_ERR(priv->top_ctrl);

    + priv->rcdev = of_reset_control_get(pdev->dev.of_node, NULL);
    + if (!IS_ERR(priv->rcdev))
    + reset_control_deassert(priv->rcdev);
    +
    if ((priv->version == BRCM_SATA_BCM7425) ||
    (priv->version == BRCM_SATA_NSP)) {
    priv->quirks |= BRCM_AHCI_QUIRK_NO_NCQ;
    @@ -464,6 +470,9 @@ static int brcm_ahci_remove(struct platform_device *pdev)

    brcm_sata_phys_disable(priv);

    + if (!IS_ERR(priv->rcdev))
    + reset_control_assert(priv->rcdev);
    +
    return 0;
    }

    --
    2.17.1
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