[PATCH v4 02/12] ata: ahci_brcm: Fix use of BCM7216 reset controller

Jim Quinlan
2020-06-05T21:27:22Z

A reset controller "rescal" is shared between the AHCI driver and the PCIe
driver for the BrcmSTB 7216 chip. The code is modified to allow this
sharing and to deassert() properly.

Signed-off-by: Jim Quinlan <jquinlan@broadcom.com>

Fixes: 272ecd60a636 ("ata: ahci_brcm: BCM7216 reset is self de-asserting")
Fixes: c345ec6a50e9 ("ata: ahci_brcm: Support BCM7216 reset controller
name")
---
drivers/ata/ahci_brcm.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 6853dbb4131d..c4ea555573dd 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -428,7 +428,6 @@ static int brcm_ahci_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
struct device *dev = &pdev->dev;
- const char *reset_name = NULL;
struct brcm_ahci_priv *priv;
struct ahci_host_priv *hpriv;
struct resource *res;
@@ -452,11 +451,11 @@ static int brcm_ahci_probe(struct platform_device *pdev)

/* Reset is optional depending on platform and named differently */
if (priv->version == BRCM_SATA_BCM7216)
- reset_name = "rescal";
+ priv->rcdev = devm_reset_control_get_optional_shared(&pdev->dev,
+ "rescal");
else
- reset_name = "ahci";
-
- priv->rcdev = devm_reset_control_get_optional(&pdev->dev, reset_name);
+ priv->rcdev = devm_reset_control_get_optional(&pdev->dev,
+ "ahci");
if (IS_ERR(priv->rcdev))
return PTR_ERR(priv->rcdev);

@@ -479,10 +478,7 @@ static int brcm_ahci_probe(struct platform_device *pdev)
break;
}

- if (priv->version == BRCM_SATA_BCM7216)
- ret = reset_control_reset(priv->rcdev);
- else
- ret = reset_control_deassert(priv->rcdev);
+ ret = reset_control_deassert(priv->rcdev);
if (ret)
return ret;

--
2.17.1