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authorTuomas Tynkkynen <ttynkkynen@nvidia.com>2013-08-12 17:06:53 +0400
committerFelipe Balbi <balbi@ti.com>2013-08-12 22:29:52 +0400
commite497a24d8e18af510879b2ae059ee20a4a58eae8 (patch)
tree43e213a25bd02b22194b8fa1409a27feeb25fccb /include/linux/usb
parent91e66700029d71d2938e1341172331c58b6bd8b3 (diff)
downloadlinux-e497a24d8e18af510879b2ae059ee20a4a58eae8.tar.xz
usb: phy: tegra: Program new PHY parameters
The Tegra30 TRM recommends configuration of certain PHY parameters for optimal quality. Program the following registers based on device tree parameters: - UTMIP_XCVR_HSSLEW: HS slew rate control. - UTMIP_HSSQUELCH_LEVEL: HS squelch detector level - UTMIP_HSDISCON_LEVEL: HS disconnect detector level. These registers exist in Tegra20, but programming them hasn't been necessary, so these parameters won't be set on Tegra20 to keep the device trees backward compatible. Additionally, the UTMIP_XCVR_SETUP parameter can be set from fuses instead of a software-programmed value, as the optimal value can vary between invidual boards. The boolean property nvidia,xcvr-setup-use-fuses can be used to enable this behaviour. Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'include/linux/usb')
-rw-r--r--include/linux/usb/tegra_usb_phy.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/usb/tegra_usb_phy.h b/include/linux/usb/tegra_usb_phy.h
index d3a63c354db9..1de16c324ec8 100644
--- a/include/linux/usb/tegra_usb_phy.h
+++ b/include/linux/usb/tegra_usb_phy.h
@@ -41,9 +41,13 @@ struct tegra_utmip_config {
u8 elastic_limit;
u8 idle_wait_delay;
u8 term_range_adj;
+ bool xcvr_setup_use_fuses;
u8 xcvr_setup;
u8 xcvr_lsfslew;
u8 xcvr_lsrslew;
+ u8 xcvr_hsslew;
+ u8 hssquelch_level;
+ u8 hsdiscon_level;
};
enum tegra_usb_phy_port_speed {