scottk/OpenCellular
1
0
Fork 0
mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2026-01-11 18:35:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

anx7688: Add custom vbus function

Browse Source 
On ANX7688, POWER_STATUS.VBusPresent is averaged 16 times, so its
value may not be set to 1 quickly enough during power role swap.
Therefore, we use a proprietary register to read the unfiltered VBus
value.

BRANCH=oak
BUG=chrome-os-partner:55221
TEST=LG monitor works over type-C, power role swap looks good

Change-Id: I68572c34440be65882f431bb892ed032da05bd0a
Reviewed-on: https://chromium-review.googlesource.com/364351
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Nicolas Boichat
2016-07-29 11:25:09 +08:00
committed by chrome-bot
parent b387bdf40e
commit e3297d7255
1 changed files with 16 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
driver/tcpm/anx7688.c
View File

@@ -160,12 +160,27 @@ static int anx7688_mux_set(int i2c_addr, mux_state_t mux_state)
return tcpc_write(port, TCPC_REG_CONFIG_STD_OUTPUT, reg);
}
#ifdef CONFIG_USB_PD_VBUS_DETECT_TCPC
static int anx7688_tcpm_get_vbus_level(int port)
{
int reg = 0;
/* On ANX7688, POWER_STATUS.VBusPresent (bit 2) is averaged 16 times, so
* its value may not be set to 1 quickly enough during power role swap.
* Therefore, we use a proprietary register to read the unfiltered VBus
* value. See crosbug.com/p/55221 .
*/
i2c_read8(I2C_PORT_TCPC, 0x50, 0x40, &reg);
return ((reg & 0x10) ? 1 : 0);
}
#endif
/* ANX7688 is a TCPCI compatible port controller */
const struct tcpm_drv anx7688_tcpm_drv = {
.init = &anx7688_init,
.get_cc = &tcpci_tcpm_get_cc,
#ifdef CONFIG_USB_PD_VBUS_DETECT_TCPC
.get_vbus_level = &tcpci_tcpm_get_vbus_level,
.get_vbus_level = &anx7688_tcpm_get_vbus_level,
#endif
.set_cc = &tcpci_tcpm_set_cc,
.set_polarity = &tcpci_tcpm_set_polarity,