On 2017-07-17 19:48, Rob Herring wrote:
> On Thu, Jul 13, 2017 at 08:44:26AM +0200, Jan Kiszka wrote:
>> The device-specific property should be prefixed with the vendor name
>> Change this and document the bindings of this platform device.
>
> You are breaking backwards compatibility. You minimally need to state
> that and why that is okay in this case.
There is no previous version yet: The patch that introduced this just
entered for 4.13. Linus remarked that "linux," is the wrong prefix and
wanted this to be changed before this version becomes final.
>
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
>> ---
>> Documentation/devicetree/bindings/gpio/gpio-exar.txt | 5 +++++
>> drivers/gpio/gpio-exar.c | 2 +-
>> drivers/tty/serial/8250/8250_exar.c | 4 ++--
>> 3 files changed, 8 insertions(+), 3 deletions(-)
>> create mode 100644 Documentation/devicetree/bindings/gpio/gpio-exar.txt
>>
>> diff --git a/Documentation/devicetree/bindings/gpio/gpio-exar.txt b/Documentation/devicetree/bindings/gpio/gpio-exar.txt
>> new file mode 100644
>> index 000000000000..452180229b36
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/gpio/gpio-exar.txt
>> @@ -0,0 +1,5 @@
>> +Exportable MPIO interface of Exar UART chips
>> +
>> +Required properties of platform device:
>
> platform device is a Linuxism.
Will drop the term.
>
>> + - exar,first-pin: first exportable pins (0..15)
>> + - ngpios: number of exportable pins (1..16)
>
> Required, but you don't use it?
We do, see the code (parts visible below).
>
>> diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
>> index fb8d304cfa17..0ecd2369c2ca 100644
>> --- a/drivers/gpio/gpio-exar.c
>> +++ b/drivers/gpio/gpio-exar.c
>> @@ -132,7 +132,7 @@ static int gpio_exar_probe(struct platform_device *pdev)
>> if (!p)
>> return -ENOMEM;
>>
>> - ret = device_property_read_u32(&pdev->dev, "linux,first-pin",
>> + ret = device_property_read_u32(&pdev->dev, "exar,first-pin",
>> &first_pin);
>> if (ret)
>> return ret;
>> diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
>> index b5c98e5bf524..c6360fbdf808 100644
>> --- a/drivers/tty/serial/8250/8250_exar.c
>> +++ b/drivers/tty/serial/8250/8250_exar.c
>> @@ -261,7 +261,7 @@ __xr17v35x_register_gpio(struct pci_dev *pcidev,
>> }
>>
>> static const struct property_entry exar_gpio_properties[] = {
>> - PROPERTY_ENTRY_U32("linux,first-pin", 0),
>> + PROPERTY_ENTRY_U32("exar,first-pin", 0),
>> PROPERTY_ENTRY_U32("ngpios", 16),
>> { }
>> };
>> @@ -326,7 +326,7 @@ static int iot2040_rs485_config(struct uart_port *port,
>> }
>>
>> static const struct property_entry iot2040_gpio_properties[] = {
>> - PROPERTY_ENTRY_U32("linux,first-pin", 10),
>> + PROPERTY_ENTRY_U32("exar,first-pin", 10),
>> PROPERTY_ENTRY_U32("ngpios", 1),
>> { }
>> };
>> --
>> 2.12.3
>> --
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Thanks,
Jan
--
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux
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