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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>
This commit is contained in:
Andrew Lunn 2013-12-26 18:25:41 +01:00 committed by Tejun Heo
parent 3a3a8cf51d
commit b7db4f2e15
1 changed files with 27 additions and 0 deletions
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27
drivers/ata/sata_mv.c
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@ -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>
@ -564,6 +565,12 @@ 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,
@ -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 @@ static int mv_platform_probe(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 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;
}