diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2015-11-23 14:29:13 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2015-11-24 11:02:50 -0800 |
| commit | feb63bec886ccd0abcb8961717ec9911fd7948a3 (patch) | |
| tree | 1140453f19999dd5d5fdd9939b9e4b6b706fc02c | |
| parent | 3df2228c147728b516e85f8d010b0905be182045 (diff) | |
| download | chrome-ec-feb63bec886ccd0abcb8961717ec9911fd7948a3.tar.gz | |
chell: Apply USB EQ settings to PS8740 USB mux
Apply the recommended USB EQ settings for Tx and Rx channel
loss compensation to the PS8740 USB mux chip. This is called
after the driver is initialized and sets up the chip for the
first time.
BUG=chrome-os-partner:47074
BRANCH=none
TEST=build and boot on chell, read back registers to verify
> i2cxfer r 1 0x34 0x32
0x60 [96]
> i2cxfer r 1 0x34 0x3b
0x60 [96]
> i2cxfer r 1 0x20 0x32
0x60 [96]
> i2cxfer r 1 0x20 0x3b
0x60 [96]
Change-Id: I95334be9eed2858864787500a7483fa043947148
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/313748
Reviewed-by: Shawn N <shawnn@chromium.org>
| -rw-r--r-- | board/chell/board.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/board/chell/board.c b/board/chell/board.c index 98f8962409..6c31a05dc8 100644 --- a/board/chell/board.c +++ b/board/chell/board.c @@ -20,6 +20,7 @@ #include "keyboard_scan.h" #include "lid_switch.h" #include "pi3usb9281.h" +#include "ps8740.h" #include "power.h" #include "power_button.h" #include "pwm.h" @@ -149,14 +150,26 @@ struct pi3usb9281_config pi3usb9281_chips[] = { BUILD_ASSERT(ARRAY_SIZE(pi3usb9281_chips) == CONFIG_USB_SWITCH_PI3USB9281_CHIP_COUNT); +static int ps8740_tune_mux(const struct usb_mux *mux) +{ + /* Apply same USB EQ settings to both Type-C mux */ + ps8740_tune_usb_eq(mux->port_addr, + PS8740_USB_EQ_TX_6_5_DB, + PS8740_USB_EQ_RX_14_3_DB); + + return EC_SUCCESS; +} + struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_COUNT] = { { .port_addr = 0x34, .driver = &ps8740_usb_mux_driver, + .board_init = &ps8740_tune_mux, }, { .port_addr = 0x20, .driver = &ps8740_usb_mux_driver, + .board_init = &ps8740_tune_mux, } }; |