From: Florian Fainelli f.fainelli@gmail.com
commit 2b2c47d9e1fe90311b725125d6252a859ee87a79 upstream.
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 Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/ata/ahci_brcm.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c index ac9eae50..bada93d 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) @@ -433,6 +435,11 @@ static int brcm_ahci_probe(struct platform_device *pdev) if (IS_ERR(priv->top_ctrl)) return PTR_ERR(priv->top_ctrl);
+ /* Reset is optional depending on platform */ + priv->rcdev = devm_reset_control_get(&pdev->dev, "ahci"); + if (!IS_ERR_OR_NULL(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;