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authorAndrew Lunn <andrew@lunn.ch>2013-12-26 18:25:41 +0100
committerTejun Heo <tj@kernel.org>2014-01-20 07:46:15 -0500
commitb7db4f2e15603c394da56a0536a33669f4c87c4f (patch)
tree086a200e4a87f30ce62b16d489a7be3aa17e6c11 /drivers/ata
parent3a3a8cf51df49e61dce7e623fb2bcc1a9e560efe (diff)
SATA: MV: Add support for the optional PHYs
Some Marvell SoCs have a SATA PHY which can be powered off, in order to save power. Make use of the generic phy framework to control these phys. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_mv.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index dc9d4b1ea4ec..20a7517bd339 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -60,6 +60,7 @@
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/clk.h>
+#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/ata_platform.h>
#include <linux/mbus.h>
@@ -565,6 +566,12 @@ struct mv_host_priv {
struct clk *clk;
struct clk **port_clks;
/*
+ * Some devices have a SATA PHY which can be enabled/disabled
+ * in order to save power. These are optional: if the platform
+ * devices does not have any phy, they won't be used.
+ */
+ struct phy **port_phys;
+ /*
* These consistent DMA memory pools give us guaranteed
* alignment for hardware-accessed data structures,
* and less memory waste in accomplishing the alignment.
@@ -4091,6 +4098,11 @@ static int mv_platform_probe(struct platform_device *pdev)
GFP_KERNEL);
if (!hpriv->port_clks)
return -ENOMEM;
+ hpriv->port_phys = devm_kzalloc(&pdev->dev,
+ sizeof(struct phy *) * n_ports,
+ GFP_KERNEL);
+ if (!hpriv->port_phys)
+ return -ENOMEM;
host->private_data = hpriv;
hpriv->n_ports = n_ports;
hpriv->board_idx = chip_soc;
@@ -4112,6 +4124,17 @@ static int mv_platform_probe(struct platform_device *pdev)
hpriv->port_clks[port] = clk_get(&pdev->dev, port_number);
if (!IS_ERR(hpriv->port_clks[port]))
clk_prepare_enable(hpriv->port_clks[port]);
+
+ sprintf(port_number, "port%d", port);
+ hpriv->port_phys[port] = devm_phy_get(&pdev->dev, port_number);
+ if (IS_ERR(hpriv->port_phys[port])) {
+ rc = PTR_ERR(hpriv->port_phys[port]);
+ hpriv->port_phys[port] = NULL;
+ if ((rc != -EPROBE_DEFER) && (rc != -ENODEV))
+ dev_warn(&pdev->dev, "error getting phy");
+ goto err;
+ } else
+ phy_power_on(hpriv->port_phys[port]);
}
/*
@@ -4156,6 +4179,8 @@ err:
clk_disable_unprepare(hpriv->port_clks[port]);
clk_put(hpriv->port_clks[port]);
}
+ if (hpriv->port_phys[port])
+ phy_power_off(hpriv->port_phys[port]);
}
return rc;
@@ -4185,6 +4210,8 @@ static int mv_platform_remove(struct platform_device *pdev)
clk_disable_unprepare(hpriv->port_clks[port]);
clk_put(hpriv->port_clks[port]);
}
+ if (hpriv->port_phys[port])
+ phy_power_off(hpriv->port_phys[port]);
}
return 0;
}