mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 10:40:15 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

usb: dwc3: pci: Set "linux,phy_charger_detect" property on some Bay Trail boards

Browse source 
Some Android x86 tablets with a Bay Trail (BYT) SoC and a Crystal Cove
PMIC, which does not support charger-detection, rely on the TUSB1211 phy
for charger-detection.

Windows tablets with the same SoC + PMIC often use an extra chip for
charger-detection like the FSA831A. But since on Android tablets
the designers already need to add a TUSB1211 phy to support device/gadget
mode the phy is used to do charger-detection instead.

These Android x86 tablets can be identified by the unique combination of
a Bay Trail SoC (already checked for by PCI-ids) + a Crystal Cove PMIC +
not using the standard ACPI battery and ac drivers. Where as on Windows
tablets the standard ACPI battery and ac drivers will be used on BYT
boards with a Crystal Cove PMIC.

Set a special kernel-internal (so not part of the dt-bindings)
"linux,phy_charger_detect" property on these boards, which tells the
tusb1210 driver to enable charger-detection.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220213130524.18748-5-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2022-02-13 14:05:19 +01:00 committed by Greg Kroah-Hartman
parent e285cb4039
commit 582ab24e09
1 changed files with 24 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/usb/dwc3/dwc3-pci.c
View file

@ -119,6 +119,14 @@ static const struct property_entry dwc3_pci_intel_properties[] = {
{}
};
static const struct property_entry dwc3_pci_intel_phy_charger_detect_properties[] = {
PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
PROPERTY_ENTRY_BOOL("linux,phy_charger_detect"),
PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
{}
};
static const struct property_entry dwc3_pci_mrfld_properties[] = {
PROPERTY_ENTRY_STRING("dr_mode", "otg"),
PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
@ -161,6 +169,10 @@ static const struct software_node dwc3_pci_intel_swnode = {
.properties = dwc3_pci_intel_properties,
};
static const struct software_node dwc3_pci_intel_phy_charger_detect_swnode = {
.properties = dwc3_pci_intel_phy_charger_detect_properties,
};
static const struct software_node dwc3_pci_intel_mrfld_swnode = {
.properties = dwc3_pci_mrfld_properties,
};
@ -228,6 +240,18 @@ static int dwc3_pci_quirks(struct dwc3_pci *dwc,
gpiod_put(gpio);
usleep_range(10000, 11000);
}
/*
* Some Android tablets with a Crystal Cove PMIC
* (INT33FD), rely on the TUSB1211 phy for charger
* detection. These can be identified by them _not_
* using the standard ACPI battery and ac drivers.
*/
if (acpi_dev_present("INT33FD", "1", 2) &&
acpi_quirk_skip_acpi_ac_and_battery()) {
dev_info(&pdev->dev, "Using TUSB1211 phy for charger detection\n");
swnode = &dwc3_pci_intel_phy_charger_detect_swnode;
}
}
}