diff options
| author | Richard Zhu <r65037@freescale.com> | 2011-12-14 12:55:52 +0800 |
|---|---|---|
| committer | Richard Zhu <r65037@freescale.com> | 2011-12-15 10:14:16 +0800 |
| commit | d1fa9666b6bfd85373a50804ed559709da9369ce (patch) | |
| tree | 5bab98ca12385e910a81955f94df71e94ebe8784 /arch/arm/mach-mx6 | |
| parent | 1f6ec0deec61b2d5c61859fb4d7445c54b70811b (diff) | |
ENGR00170244-2 ARM: AHCI: Enable PDDQ mode on mx6 arm2 board
In order to save the power consumption, enable the
PDDQ mode of AHCI PHY when there is no sata disk
on the port
Signed-off-by: Richard Zhu <r65037@freescale.com>
Diffstat (limited to 'arch/arm/mach-mx6')
| -rw-r--r-- | arch/arm/mach-mx6/board-mx6q_arm2.c | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/arch/arm/mach-mx6/board-mx6q_arm2.c b/arch/arm/mach-mx6/board-mx6q_arm2.c index a6d469790db7..54c7fc0e85d2 100644 --- a/arch/arm/mach-mx6/board-mx6q_arm2.c +++ b/arch/arm/mach-mx6/board-mx6q_arm2.c @@ -818,7 +818,7 @@ static struct viv_gpu_platform_data imx6q_gpu_pdata __initdata = { static int mx6q_arm2_sata_init(struct device *dev, void __iomem *addr) { u32 tmpdata; - int ret = 0, iterations = 20; + int ret = 0; struct clk *clk; /* Enable SATA PWR CTRL_0 of MAX7310 */ @@ -867,23 +867,9 @@ static int mx6q_arm2_sata_init(struct device *dev, void __iomem *addr) tmpdata = clk_get_rate(clk) / 1000; clk_put(clk); - sata_init(addr, tmpdata); - - /* Release resources when there is no device on the port */ - do { - if ((readl(addr + PORT_SATA_SR) & 0xF) == 0) - msleep(25); - else - break; - - if (iterations == 0) { - dev_info(dev, "NO sata disk.\n"); - ret = -ENODEV; - goto release_sata_clk; - } - } while (iterations-- > 0); - - return ret; + ret = sata_init(addr, tmpdata); + if (ret == 0) + return ret; release_sata_clk: clk_disable(sata_clk); |