* [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource()
@ 2021-08-06 11:17 Andy Shevchenko
2021-08-06 11:17 ` [PATCH v3 2/2] platform/surface: aggregator: Use serdev_acpi_get_uart_resource() helper Andy Shevchenko
2021-08-06 12:08 ` [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Hans de Goede
0 siblings, 2 replies; 4+ messages in thread
From: Andy Shevchenko @ 2021-08-06 11:17 UTC (permalink / raw)
To: Hans de Goede, Maximilian Luz, Greg Kroah-Hartman, Lee Jones,
Andy Shevchenko, platform-driver-x86, linux-kernel, linux-serial
Cc: Mark Gross, Rob Herring, Jiri Slaby
The same as for I²C Serial Bus resource split and export
serdev_acpi_get_uart_resource(). We have already a few users
one of which is converted here.
Rationale of this is to consolidate parsing UART Serial Bus
resource in one place as it's done, e.g., for I²C Serial Bus.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
v3: amended kernel doc to have RETURN section (Jiri)
drivers/tty/serdev/core.c | 36 +++++++++++++++++++++++++++++-------
include/linux/serdev.h | 14 ++++++++++++++
2 files changed, 43 insertions(+), 7 deletions(-)
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 92498961fd92..f1324fe99378 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -562,23 +562,45 @@ struct acpi_serdev_lookup {
int index;
};
+/**
+ * serdev_acpi_get_uart_resource - Gets UARTSerialBus resource if type matches
+ * @ares: ACPI resource
+ * @uart: Pointer to UARTSerialBus resource will be returned here
+ *
+ * Checks if the given ACPI resource is of type UARTSerialBus.
+ * In this case, returns a pointer to it to the caller.
+ *
+ * Return: True if resource type is of UARTSerialBus, otherwise false.
+ */
+bool serdev_acpi_get_uart_resource(struct acpi_resource *ares,
+ struct acpi_resource_uart_serialbus **uart)
+{
+ struct acpi_resource_uart_serialbus *sb;
+
+ if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
+ return false;
+
+ sb = &ares->data.uart_serial_bus;
+ if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_UART)
+ return false;
+
+ *uart = sb;
+ return true;
+}
+EXPORT_SYMBOL_GPL(serdev_acpi_get_uart_resource);
+
static int acpi_serdev_parse_resource(struct acpi_resource *ares, void *data)
{
struct acpi_serdev_lookup *lookup = data;
struct acpi_resource_uart_serialbus *sb;
acpi_status status;
- if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
- return 1;
-
- if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
+ if (!serdev_acpi_get_uart_resource(ares, &sb))
return 1;
if (lookup->index != -1 && lookup->n++ != lookup->index)
return 1;
- sb = &ares->data.uart_serial_bus;
-
status = acpi_get_handle(lookup->device_handle,
sb->resource_source.string_ptr,
&lookup->controller_handle);
@@ -586,7 +608,7 @@ static int acpi_serdev_parse_resource(struct acpi_resource *ares, void *data)
return 1;
/*
- * NOTE: Ideally, we would also want to retreive other properties here,
+ * NOTE: Ideally, we would also want to retrieve other properties here,
* once setting them before opening the device is supported by serdev.
*/
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index 9f14f9c12ec4..3368c261ab62 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -327,4 +327,18 @@ static inline int serdev_tty_port_unregister(struct tty_port *port)
}
#endif /* CONFIG_SERIAL_DEV_CTRL_TTYPORT */
+struct acpi_resource;
+struct acpi_resource_uart_serialbus;
+
+#ifdef CONFIG_ACPI
+bool serdev_acpi_get_uart_resource(struct acpi_resource *ares,
+ struct acpi_resource_uart_serialbus **uart);
+#else
+static inline bool serdev_acpi_get_uart_resource(struct acpi_resource *ares,
+ struct acpi_resource_uart_serialbus **uart)
+{
+ return false;
+}
+#endif /* CONFIG_ACPI */
+
#endif /*_LINUX_SERDEV_H */
--
2.30.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v3 2/2] platform/surface: aggregator: Use serdev_acpi_get_uart_resource() helper
2021-08-06 11:17 [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Andy Shevchenko
@ 2021-08-06 11:17 ` Andy Shevchenko
2021-08-06 12:08 ` [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Hans de Goede
1 sibling, 0 replies; 4+ messages in thread
From: Andy Shevchenko @ 2021-08-06 11:17 UTC (permalink / raw)
To: Hans de Goede, Maximilian Luz, Greg Kroah-Hartman, Lee Jones,
Andy Shevchenko, platform-driver-x86, linux-kernel, linux-serial
Cc: Mark Gross, Rob Herring, Jiri Slaby
serdev provides a generic helper to get UART Serial Bus resources.
Use it instead of an open coded variant.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
---
v3: no changes
drivers/platform/surface/aggregator/core.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/drivers/platform/surface/aggregator/core.c b/drivers/platform/surface/aggregator/core.c
index 279d9df19c01..c61bbeeec2df 100644
--- a/drivers/platform/surface/aggregator/core.c
+++ b/drivers/platform/surface/aggregator/core.c
@@ -301,20 +301,13 @@ static acpi_status ssam_serdev_setup_via_acpi_crs(struct acpi_resource *rsc,
void *ctx)
{
struct serdev_device *serdev = ctx;
- struct acpi_resource_common_serialbus *serial;
struct acpi_resource_uart_serialbus *uart;
bool flow_control;
int status = 0;
- if (rsc->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
+ if (!serdev_acpi_get_uart_resource(rsc, &uart))
return AE_OK;
- serial = &rsc->data.common_serial_bus;
- if (serial->type != ACPI_RESOURCE_SERIAL_TYPE_UART)
- return AE_OK;
-
- uart = &rsc->data.uart_serial_bus;
-
/* Set up serdev device. */
serdev_device_set_baudrate(serdev, uart->default_baud_rate);
--
2.30.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource()
2021-08-06 11:17 [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Andy Shevchenko
2021-08-06 11:17 ` [PATCH v3 2/2] platform/surface: aggregator: Use serdev_acpi_get_uart_resource() helper Andy Shevchenko
@ 2021-08-06 12:08 ` Hans de Goede
2021-08-13 7:13 ` Greg Kroah-Hartman
1 sibling, 1 reply; 4+ messages in thread
From: Hans de Goede @ 2021-08-06 12:08 UTC (permalink / raw)
To: Andy Shevchenko, Maximilian Luz, Greg Kroah-Hartman, Lee Jones,
platform-driver-x86, linux-kernel, linux-serial
Cc: Mark Gross, Rob Herring, Jiri Slaby
Hi,
On 8/6/21 1:17 PM, Andy Shevchenko wrote:
> The same as for I²C Serial Bus resource split and export
> serdev_acpi_get_uart_resource(). We have already a few users
> one of which is converted here.
>
> Rationale of this is to consolidate parsing UART Serial Bus
> resource in one place as it's done, e.g., for I²C Serial Bus.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
As mentioned before I believe it is best if this series is
merged in its entirety through to the tty tree, here is my
ack for patch 2/2 for that:
Acked-by: Hans de Goede <hdegoede@redhat.com>
Greg, can you pickup the entire series please?
Regards,
Hans
> ---
> v3: amended kernel doc to have RETURN section (Jiri)
> drivers/tty/serdev/core.c | 36 +++++++++++++++++++++++++++++-------
> include/linux/serdev.h | 14 ++++++++++++++
> 2 files changed, 43 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index 92498961fd92..f1324fe99378 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -562,23 +562,45 @@ struct acpi_serdev_lookup {
> int index;
> };
>
> +/**
> + * serdev_acpi_get_uart_resource - Gets UARTSerialBus resource if type matches
> + * @ares: ACPI resource
> + * @uart: Pointer to UARTSerialBus resource will be returned here
> + *
> + * Checks if the given ACPI resource is of type UARTSerialBus.
> + * In this case, returns a pointer to it to the caller.
> + *
> + * Return: True if resource type is of UARTSerialBus, otherwise false.
> + */
> +bool serdev_acpi_get_uart_resource(struct acpi_resource *ares,
> + struct acpi_resource_uart_serialbus **uart)
> +{
> + struct acpi_resource_uart_serialbus *sb;
> +
> + if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
> + return false;
> +
> + sb = &ares->data.uart_serial_bus;
> + if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_UART)
> + return false;
> +
> + *uart = sb;
> + return true;
> +}
> +EXPORT_SYMBOL_GPL(serdev_acpi_get_uart_resource);
> +
> static int acpi_serdev_parse_resource(struct acpi_resource *ares, void *data)
> {
> struct acpi_serdev_lookup *lookup = data;
> struct acpi_resource_uart_serialbus *sb;
> acpi_status status;
>
> - if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
> - return 1;
> -
> - if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
> + if (!serdev_acpi_get_uart_resource(ares, &sb))
> return 1;
>
> if (lookup->index != -1 && lookup->n++ != lookup->index)
> return 1;
>
> - sb = &ares->data.uart_serial_bus;
> -
> status = acpi_get_handle(lookup->device_handle,
> sb->resource_source.string_ptr,
> &lookup->controller_handle);
> @@ -586,7 +608,7 @@ static int acpi_serdev_parse_resource(struct acpi_resource *ares, void *data)
> return 1;
>
> /*
> - * NOTE: Ideally, we would also want to retreive other properties here,
> + * NOTE: Ideally, we would also want to retrieve other properties here,
> * once setting them before opening the device is supported by serdev.
> */
>
> diff --git a/include/linux/serdev.h b/include/linux/serdev.h
> index 9f14f9c12ec4..3368c261ab62 100644
> --- a/include/linux/serdev.h
> +++ b/include/linux/serdev.h
> @@ -327,4 +327,18 @@ static inline int serdev_tty_port_unregister(struct tty_port *port)
> }
> #endif /* CONFIG_SERIAL_DEV_CTRL_TTYPORT */
>
> +struct acpi_resource;
> +struct acpi_resource_uart_serialbus;
> +
> +#ifdef CONFIG_ACPI
> +bool serdev_acpi_get_uart_resource(struct acpi_resource *ares,
> + struct acpi_resource_uart_serialbus **uart);
> +#else
> +static inline bool serdev_acpi_get_uart_resource(struct acpi_resource *ares,
> + struct acpi_resource_uart_serialbus **uart)
> +{
> + return false;
> +}
> +#endif /* CONFIG_ACPI */
> +
> #endif /*_LINUX_SERDEV_H */
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource()
2021-08-06 12:08 ` [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Hans de Goede
@ 2021-08-13 7:13 ` Greg Kroah-Hartman
0 siblings, 0 replies; 4+ messages in thread
From: Greg Kroah-Hartman @ 2021-08-13 7:13 UTC (permalink / raw)
To: Hans de Goede
Cc: Andy Shevchenko, Maximilian Luz, Lee Jones, platform-driver-x86,
linux-kernel, linux-serial, Mark Gross, Rob Herring, Jiri Slaby
On Fri, Aug 06, 2021 at 02:08:42PM +0200, Hans de Goede wrote:
> Hi,
>
> On 8/6/21 1:17 PM, Andy Shevchenko wrote:
> > The same as for I²C Serial Bus resource split and export
> > serdev_acpi_get_uart_resource(). We have already a few users
> > one of which is converted here.
> >
> > Rationale of this is to consolidate parsing UART Serial Bus
> > resource in one place as it's done, e.g., for I²C Serial Bus.
> >
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> > Reviewed-by: Hans de Goede <hdegoede@redhat.com>
>
> As mentioned before I believe it is best if this series is
> merged in its entirety through to the tty tree, here is my
> ack for patch 2/2 for that:
>
> Acked-by: Hans de Goede <hdegoede@redhat.com>
>
> Greg, can you pickup the entire series please?
Now picked up, thanks.
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-08-06 11:17 [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Andy Shevchenko
2021-08-06 11:17 ` [PATCH v3 2/2] platform/surface: aggregator: Use serdev_acpi_get_uart_resource() helper Andy Shevchenko
2021-08-06 12:08 ` [PATCH v3 1/2] serdev: Split and export serdev_acpi_get_uart_resource() Hans de Goede
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