Hi Marcel,
Le 07/09/2017 à 19:25, Marcel Holtmann a écrit :
Hi Fred,
UART devices is expected to be enumerated by SerDev subsystem.
Rename spi_i2c_slave to serial_slave as this is no more specific to spi or
i2c buses.
Signed-off-by: Frédéric Danis <frederic.danis.oss@xxxxxxxxx>
---
drivers/acpi/scan.c | 29 ++++++++++++-----------------
include/acpi/acpi_bus.h | 2 +-
2 files changed, 13 insertions(+), 18 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 70fd550..04c5ecc 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1429,35 +1429,30 @@ static void acpi_init_coherency(struct acpi_device *adev)
adev->flags.coherent_dma = cca;
}
-static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data)
+static int acpi_check_serial_slave(struct acpi_resource *ares, void *data)
{
- bool *is_spi_i2c_slave_p = data;
+ bool *is_serial_slave_p = data;
if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
return 1;
- /*
- * devices that are connected to UART still need to be enumerated to
- * platform bus
- */
- if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
- *is_spi_i2c_slave_p = true;
+ *is_serial_slave_p = true;
/* no need to do more checking */
return -1;
}
isn’t this disabled the I2C support? I mean serial bus doesn’t always mean UART. There are other serial buses and even USB is actually a serial bus.
This will not disable I2C or SPI support but will add UART slave devices
to the devices which are not enumerated during ACPI scan, allowing them
do be enumerated by their respective parents, SerDev in case of UART.
-static bool acpi_is_spi_i2c_slave(struct acpi_device *device)
+static bool acpi_is_serial_slave(struct acpi_device *device)
{
struct list_head resource_list;
- bool is_spi_i2c_slave = false;
+ bool is_serial_slave = false;
INIT_LIST_HEAD(&resource_list);
- acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave,
- &is_spi_i2c_slave);
+ acpi_dev_get_resources(device, &resource_list, acpi_check_serial_slave,
+ &is_serial_slave);
acpi_dev_free_resource_list(&resource_list);
- return is_spi_i2c_slave;
+ return is_serial_slave;
}
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
@@ -1476,7 +1471,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
acpi_bus_get_flags(device);
device->flags.match_driver = false;
device->flags.initialized = true;
- device->flags.spi_i2c_slave = acpi_is_spi_i2c_slave(device);
+ device->flags.serial_slave = acpi_is_serial_slave(device);
acpi_device_clear_enumerated(device);
device_initialize(&device->dev);
dev_set_uevent_suppress(&device->dev, true);
@@ -1763,7 +1758,7 @@ static void acpi_default_enumeration(struct acpi_device *device)
* Do not enumerate SPI/I2C slaves as they will be enumerated by their
* respective parents.
*/
- if (!device->flags.spi_i2c_slave) {
+ if (!device->flags.serial_slave) {
acpi_create_platform_device(device, NULL);
acpi_device_set_enumerated(device);
} else {
@@ -1860,7 +1855,7 @@ static void acpi_bus_attach(struct acpi_device *device)
return;
device->flags.match_driver = true;
- if (ret > 0 && !device->flags.spi_i2c_slave) {
+ if (ret > 0 && !device->flags.serial_slave) {
acpi_device_set_enumerated(device);
goto ok;
}
@@ -1869,7 +1864,7 @@ static void acpi_bus_attach(struct acpi_device *device)
if (ret < 0)
return;
- if (!device->pnp.type.platform_id && !device->flags.spi_i2c_slave)
+ if (!device->pnp.type.platform_id && !device->flags.serial_slave)
acpi_device_set_enumerated(device);
else
acpi_default_enumeration(device);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 68bc6be..49a82f8 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -211,7 +211,7 @@ struct acpi_device_flags {
u32 of_compatible_ok:1;
u32 coherent_dma:1;
u32 cca_seen:1;
- u32 spi_i2c_slave:1;
+ u32 serial_slave:1;
u32 reserved:19;
};
I am not an ACPI expert, but wouldn’t we better have a serial_bus_slave here. And the serial_bus_slave can be either UART or I2C? Or have a pretty good commit message explaining why this is serial_slave only.
I will rename it.
serial_bus_slave can be either SPI, I2C or UART (cf.
http://elixir.free-electrons.com/linux/latest/source/include/acpi/acrestyp.h#L446).
Regards,
Fred
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