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platform/x86: x86-android-tablets: Add support for getting serdev-controller by PCI parent

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On the Vexia EDU ATLA 10 tablet, which ships with Android + a custom Linux
(guadalinex) using the custom Android kernel the UART controllers are not
enumerated as ACPI devices as they typically are.

Instead they are enumerated through PCI and getting the serdev-controller
by ACPI HID + UID does not work.

Add support for getting the serdev-controller by the PCI devfn of its
parent instead.

This also renames the use_pci_devname flag to use_pci since the former
name now no longer is accurate.

Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20241204204227.95757-8-hdegoede@redhat.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Hans de Goede 2024-12-04 21:42:18 +01:00 committed by Ilpo Järvinen
parent dd6db239cb
commit 7d28fb4d16
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
3 changed files with 24 additions and 5 deletions
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22
drivers/platform/x86/x86-android-tablets/core.c
View File

@ -212,7 +212,7 @@ static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info
if (board_info.irq < 0)
return board_info.irq;
if (dev_info->use_pci_devname)
if (dev_info->use_pci)
adap = get_i2c_adap_by_pci_parent(client_info);
else
adap = get_i2c_adap_by_handle(client_info);
@ -271,6 +271,19 @@ static __init int x86_instantiate_spi_dev(const struct x86_dev_info *dev_info, i
return 0;
}
static __init struct device *
get_serdev_controller_by_pci_parent(const struct x86_serdev_info *info)
{
struct pci_dev *pdev;
pdev = pci_get_domain_bus_and_slot(0, 0, info->ctrl.pci.devfn);
if (!pdev)
return ERR_PTR(-EPROBE_DEFER);
/* This puts our reference on pdev and returns a ref on the ctrl */
return get_serdev_controller_from_parent(&pdev->dev, 0, info->ctrl_devname);
}
static __init int x86_instantiate_serdev(const struct x86_dev_info *dev_info, int idx)
{
const struct x86_serdev_info *info = &dev_info->serdev_info[idx];
@ -279,8 +292,11 @@ static __init int x86_instantiate_serdev(const struct x86_dev_info *dev_info, in
struct device *ctrl_dev;
int ret = -ENODEV;
ctrl_dev = get_serdev_controller(info->ctrl.acpi.hid, info->ctrl.acpi.uid, 0,
info->ctrl_devname);
if (dev_info->use_pci)
ctrl_dev = get_serdev_controller_by_pci_parent(info);
else
ctrl_dev = get_serdev_controller(info->ctrl.acpi.hid, info->ctrl.acpi.uid,
0, info->ctrl_devname);
if (IS_ERR(ctrl_dev))
return PTR_ERR(ctrl_dev);

2
drivers/platform/x86/x86-android-tablets/other.c
View File

@ -757,7 +757,7 @@ const struct x86_dev_info vexia_edu_atla10_info __initconst = {
.i2c_client_count = ARRAY_SIZE(vexia_edu_atla10_i2c_clients),
.gpiod_lookup_tables = vexia_edu_atla10_gpios,
.init = vexia_edu_atla10_init,
.use_pci_devname = true,
.use_pci = true,
};
/*

5
drivers/platform/x86/x86-android-tablets/x86-android-tablets.h
View File

@ -62,6 +62,9 @@ struct x86_serdev_info {
const char *hid;
const char *uid;
} acpi;
struct {
unsigned int devfn;
} pci;
} ctrl;
const char *ctrl_devname;
/*
@ -95,7 +98,7 @@ struct x86_dev_info {
int gpio_button_count;
int (*init)(struct device *dev);
void (*exit)(void);
bool use_pci_devname;
bool use_pci;
};
int x86_android_tablet_get_gpiod(const char *chip, int pin, const char *con_id,