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ata: ceva: Disable Device Sleep capability 

Since CEVA controller does not support Device Sleep capability,
we need to clear that feature by clearing the DEVSLP bit in word78
of IDENTIFY DEVICE data. This patch does the same.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Anurag Kumar Vulisha 2017-08-21 13:17:19 +02:00 committed by Tejun Heo
parent e8fc8b858c
commit ff0d63778c
1 changed files with 18 additions and 0 deletions
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18
drivers/ata/ahci_ceva.c
View File

@ -81,8 +81,26 @@ struct ceva_ahci_priv {
int flags;
};
static unsigned int ceva_ahci_read_id(struct ata_device *dev,
struct ata_taskfile *tf, u16 *id)
{
u32 err_mask;
err_mask = ata_do_dev_read_id(dev, tf, id);
if (err_mask)
return err_mask;
/*
* Since CEVA controller does not support device sleep feature, we
* need to clear DEVSLP (bit 8) in word78 of the IDENTIFY DEVICE data.
*/
id[ATA_ID_FEATURE_SUPP] &= cpu_to_le16(~(1 << 8));
return 0;
}
static struct ata_port_operations ahci_ceva_ops = {
.inherits = &ahci_platform_ops,
.read_id = ceva_ahci_read_id,
};
static const struct ata_port_info ahci_ceva_port_info = {