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| author | Thomas Ryu <smilesr.ryu@samsung.com> | 2011-12-13 20:47:30 +0900 |
|---|---|---|
| committer | Simon Wilson <simonwilson@google.com> | 2012-01-11 18:34:41 -0800 |
| commit | 9345ff5c125a0597bc9deb76ec784b883f616107 (patch) | |
| tree | 377463300c992b912918867b8fc39a61ee251ae9 /arch/arm/mach-s5pv210 | |
| parent | c8c609f0d82e86be9827faf1980b97dea15c529f (diff) | |
| download | kernel_samsung_aries-9345ff5c125a0597bc9deb76ec784b883f616107.zip kernel_samsung_aries-9345ff5c125a0597bc9deb76ec784b883f616107.tar.gz kernel_samsung_aries-9345ff5c125a0597bc9deb76ec784b883f616107.tar.bz2 | |
ARM: S5PC11X: improve USB signal quality
Tunning of PHY0 Tune Register to improve physical characteristics.
This improves the margin of USB eye diagram, which means
the quality of USB signal is also improved.
Signed-off-by: Thomas Ryu <smilesr.ryu@samsung.com>
Diffstat (limited to 'arch/arm/mach-s5pv210')
| -rwxr-xr-x | arch/arm/mach-s5pv210/mach-herring.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm/mach-s5pv210/mach-herring.c b/arch/arm/mach-s5pv210/mach-herring.c index f605dcf..be33104 100755 --- a/arch/arm/mach-s5pv210/mach-herring.c +++ b/arch/arm/mach-s5pv210/mach-herring.c @@ -5977,9 +5977,8 @@ void otg_phy_init(void) writel(readl(S3C_USBOTG_PHYTUNE) | (0x1<<20), S3C_USBOTG_PHYTUNE); - /* set DC level as 6 (6%) */ - writel((readl(S3C_USBOTG_PHYTUNE) & ~(0xf)) | (0x1<<2) | (0x1<<1), - S3C_USBOTG_PHYTUNE); + /* set DC level as 0xf (24%) */ + writel(readl(S3C_USBOTG_PHYTUNE) | 0xf, S3C_USBOTG_PHYTUNE); } EXPORT_SYMBOL(otg_phy_init); |