ahci-platform: Add support for an optional regulator for sata-target power
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 8d5a9a7..4befd78 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -185,6 +185,14 @@
return -ENOMEM;
}
+ hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
+ if (IS_ERR(hpriv->target_pwr)) {
+ rc = PTR_ERR(hpriv->target_pwr);
+ if (rc == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ hpriv->target_pwr = NULL;
+ }
+
for (i = 0; i < AHCI_MAX_CLKS; i++) {
/*
* For now we must use clk_get(dev, NULL) for the first clock,
@@ -206,9 +214,15 @@
hpriv->clks[i] = clk;
}
+ if (hpriv->target_pwr) {
+ rc = regulator_enable(hpriv->target_pwr);
+ if (rc)
+ goto free_clk;
+ }
+
rc = ahci_enable_clks(dev, hpriv);
if (rc)
- goto free_clk;
+ goto disable_regulator;
/*
* Some platforms might need to prepare for mmio region access,
@@ -291,6 +305,9 @@
pdata->exit(dev);
disable_unprepare_clk:
ahci_disable_clks(hpriv);
+disable_regulator:
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
free_clk:
ahci_put_clks(hpriv);
return rc;
@@ -307,6 +324,9 @@
ahci_disable_clks(hpriv);
ahci_put_clks(hpriv);
+
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
}
#ifdef CONFIG_PM_SLEEP
@@ -343,6 +363,9 @@
ahci_disable_clks(hpriv);
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
+
return 0;
}
@@ -353,9 +376,15 @@
struct ahci_host_priv *hpriv = host->private_data;
int rc;
+ if (hpriv->target_pwr) {
+ rc = regulator_enable(hpriv->target_pwr);
+ if (rc)
+ return rc;
+ }
+
rc = ahci_enable_clks(dev, hpriv);
if (rc)
- return rc;
+ goto disable_regulator;
if (pdata && pdata->resume) {
rc = pdata->resume(dev);
@@ -377,6 +406,9 @@
disable_unprepare_clk:
ahci_disable_clks(hpriv);
+disable_regulator:
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
return rc;
}