Hi Roger,
On Wednesday 08 January 2014 03:17 PM, Roger Quadros wrote:
> From: Balaji T K <balaj...@ti.com>
>
> Some platforms have a PHY hooked up to the
> SATA controller. The PHY needs to be initialized
> and powered up for SATA to work. We do that
> using the PHY framework.
>
> [Roger Q] Cleaned up.
>
> CC: Tejun Heo <t...@kernel.org>
> Signed-off-by: Balaji T K <balaj...@ti.com>
> Signed-off-by: Roger Quadros <rog...@ti.com>
> ---
> drivers/ata/ahci.h | 2 ++
> drivers/ata/ahci_platform.c | 28 +++++++++++++++++++++++++++-
> 2 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
> index 2289efd..f9bbada 100644
> --- a/drivers/ata/ahci.h
> +++ b/drivers/ata/ahci.h
> @@ -37,6 +37,7 @@
>
> #include <linux/clk.h>
> #include <linux/libata.h>
> +#include <linux/phy/phy.h>
>
> /* Enclosure Management Control */
> #define EM_CTRL_MSG_TYPE 0x000f0000
> @@ -322,6 +323,7 @@ struct ahci_host_priv {
> u32 em_buf_sz; /* EM buffer size in byte */
> u32 em_msg_type; /* EM message type */
> struct clk *clk; /* Only for platforms
> supporting clk */
> + struct phy *phy; /* If platform uses phy */
> void *plat_data; /* Other platform data */
> };
>
> diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
> index d5ced13..f61093b 100644
> --- a/drivers/ata/ahci_platform.c
> +++ b/drivers/ata/ahci_platform.c
> @@ -142,6 +142,21 @@ static int ahci_probe(struct platform_device *pdev)
> }
> }
>
> + hpriv->phy = devm_phy_get(dev, "sata-phy");
> + if (IS_ERR(hpriv->phy)) {
> + dev_dbg(dev, "can't get sata-phy\n");
> + /* return only if -EPROBE_DEFER */
> + if (PTR_ERR(hpriv->phy) == -EPROBE_DEFER) {
> + rc = -EPROBE_DEFER;
> + goto disable_unprepare_clk;
> + }
> + }
> +
> + if (!IS_ERR(hpriv->phy)) {
> + phy_init(hpriv->phy);
Don't we have to check the return values of phy_init and phy_power_on? Is it
not needed because it is an optional phy?
Thanks
Kishon
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