| Message ID | 1397487482-3816-1-git-send-email-richard.genoud@gmail.com |
|---|---|
| State | Accepted, archived |
| Commit | 7f40605a2661d17275a1aa245498f4a12ad9ca9a |
| Headers | show |
Hi Richard, On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: > RTS pin is an active low pin. > For now, this doesn't change anything as the ACTIVE_LOW flag is not > handled in atmel_serial, but it will be in 3.16. > > Signed-off-by: Richard Genoud <richard.genoud@gmail.com> > --- > Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt > index 17c1042b2df8..2f7aad71b3c9 100644 > --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt > +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt > @@ -35,7 +35,7 @@ Example: > clock-names = "usart"; > atmel,use-dma-rx; > atmel,use-dma-tx; > - rts-gpios = <&pioD 15 0>; > + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; I was told we should not use macros here. If it is still the truth: rts-gpios = <&pioD 15 1>; Ludovic > }; > > - use DMA: > -- > 1.8.5.5 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
2014-04-14 17:22 GMT+02:00 Ludovic Desroches <ludovic.desroches@atmel.com>: > Hi Richard, > > On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: >> RTS pin is an active low pin. >> For now, this doesn't change anything as the ACTIVE_LOW flag is not >> handled in atmel_serial, but it will be in 3.16. >> >> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> >> --- >> Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt >> index 17c1042b2df8..2f7aad71b3c9 100644 >> --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt >> +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt >> @@ -35,7 +35,7 @@ Example: >> clock-names = "usart"; >> atmel,use-dma-rx; >> atmel,use-dma-tx; >> - rts-gpios = <&pioD 15 0>; >> + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; > > I was told we should not use macros here. If it is still the truth: > > rts-gpios = <&pioD 15 1>; That's right ! I do not totally get why, but macros aren't used in the documentation (maybe that macros names may change, whereas numbers wont'). I'll resend this. Thanks ! Richard. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 14/04/2014 17:22, Ludovic Desroches wrote: > Hi Richard, > > On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: >> RTS pin is an active low pin. >> For now, this doesn't change anything as the ACTIVE_LOW flag is not >> handled in atmel_serial, but it will be in 3.16. >> >> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> >> --- >> Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt >> index 17c1042b2df8..2f7aad71b3c9 100644 >> --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt >> +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt >> @@ -35,7 +35,7 @@ Example: >> clock-names = "usart"; >> atmel,use-dma-rx; >> atmel,use-dma-tx; >> - rts-gpios = <&pioD 15 0>; >> + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; > > I was told we should not use macros here. If it is still the truth: > > rts-gpios = <&pioD 15 1>; But I'd really like to know if macros are forbidden in DT documentation and why... Because, IMHO, <&pioD 15 1> talks less that <&pioD 15 GPIO_ACTIVE_LOW>. Which is a shame in a documentation. Rob, any idea on that ? (actually, I missed some uses of GPIO_ACTIVE_ macros in Documentation :) git grep GPIO_ACTIVE Documentation/devicetree/bindings/ Documentation/devicetree/bindings/gpio/gpio-davinci.txt: gpios = <&gpio 10 GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/gpio/gpio-davinci.txt: gpios = <&gpio 11 GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/gpio/gpio-lp3943.txt: gpios = <&gpioex 9 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/gpio/gpio-lp3943.txt: gpios = <&gpioex 10 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt: GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt: GPIO_ACTIVE_HIGH Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt: GPIO_ACTIVE_LOW Documentation/devicetree/bindings/gpio/gpio-tz1090.txt: GPIO_ACTIVE_HIGH Documentation/devicetree/bindings/gpio/gpio-tz1090.txt: GPIO_ACTIVE_LOW Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt: GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. Documentation/devicetree/bindings/input/gpio-beeper.txt: gpios = <&gpio3 23 GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/mmc/mmc.txt:also be specified using the OF_GPIO_ACTIVE_LOW flag. This creates an ambiguity Documentation/devicetree/bindings/mmc/mmc.txt:OF_GPIO_ACTIVE_LOW flag clear and specifying the respective *-inverted Documentation/devicetree/bindings/net/nfc/trf7970a.txt: ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>, Documentation/devicetree/bindings/net/nfc/trf7970a.txt: <&gpio2 5 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt: ti,power-gpio = <&gpio3 23 GPIO_ACTIVE_HIGH>; /* 87 */ Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt: GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt: gpios = <&pfc 20 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/power/isp1704.txt: nxp,enable-gpio = <&gpio3 3 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/sound/max98090.txt: interrupts = <TEGRA_GPIO(H, 4) GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/sound/rt5640.txt: interrupts = <TEGRA_GPIO(W, 3) GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/sound/rt5640.txt: <&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/sound/tpa6130a2.txt: power-gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt: reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/video/backlight/gpio-backlight.txt: gpios = <&gpio3 4 GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/video/panel-dsi-cm.txt: reset-gpios = <&gpio4 6 GPIO_ACTIVE_HIGH>; Documentation/devicetree/bindings/video/sony,acx565akm.txt: reset-gpios = <&gpio3 26 GPIO_ACTIVE_HIGH>; /* 90 */ Documentation/devicetree/bindings/video/ti,omap-dss.txt: gpios = <&gpio1 0 GPIO_ACTIVE_LOW>; /* 0, power-down */ Documentation/devicetree/bindings/video/ti,omap-dss.txt: gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */ Documentation/devicetree/bindings/video/ti,omap-dss.txt: <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */ Documentation/devicetree/bindings/video/ti,omap-dss.txt: <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */ Documentation/devicetree/bindings/video/ti,tfp410.txt: powerdown-gpios = <&twl_gpio 2 GPIO_ACTIVE_LOW>; Documentation/devicetree/bindings/video/ti,tpd12s015.txt: gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */ Documentation/devicetree/bindings/video/ti,tpd12s015.txt: <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */ Documentation/devicetree/bindings/video/ti,tpd12s015.txt: <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */ Documentation/devicetree/bindings/watchdog/gpio-wdt.txt: gpios = <&gpio3 9 GPIO_ACTIVE_LOW>; Richard. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Apr 15, 2014 at 09:39:59AM +0200, Richard Genoud wrote: > On 14/04/2014 17:22, Ludovic Desroches wrote: > > Hi Richard, > > > > On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: > >> RTS pin is an active low pin. > >> For now, this doesn't change anything as the ACTIVE_LOW flag is not > >> handled in atmel_serial, but it will be in 3.16. > >> > >> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> > >> --- > >> Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- > >> 1 file changed, 1 insertion(+), 1 deletion(-) > >> > >> diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt > >> index 17c1042b2df8..2f7aad71b3c9 100644 > >> --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt > >> +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt > >> @@ -35,7 +35,7 @@ Example: > >> clock-names = "usart"; > >> atmel,use-dma-rx; > >> atmel,use-dma-tx; > >> - rts-gpios = <&pioD 15 0>; > >> + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; > > > > I was told we should not use macros here. If it is still the truth: > > > > rts-gpios = <&pioD 15 1>; > > But I'd really like to know if macros are forbidden in DT documentation and why... > Because, IMHO, <&pioD 15 1> talks less that <&pioD 15 GPIO_ACTIVE_LOW>. > Which is a shame in a documentation. I don't remember who told me that but the reason was that device tree should not depend on Linux and macros are relative to Linux. > > Rob, any idea on that ? > > (actually, I missed some uses of GPIO_ACTIVE_ macros in Documentation :) > git grep GPIO_ACTIVE Documentation/devicetree/bindings/ > Documentation/devicetree/bindings/gpio/gpio-davinci.txt: gpios = <&gpio 10 GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/gpio/gpio-davinci.txt: gpios = <&gpio 11 GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/gpio/gpio-lp3943.txt: gpios = <&gpioex 9 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/gpio/gpio-lp3943.txt: gpios = <&gpioex 10 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt: GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. > Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt: GPIO_ACTIVE_HIGH > Documentation/devicetree/bindings/gpio/gpio-tz1090-pdc.txt: GPIO_ACTIVE_LOW > Documentation/devicetree/bindings/gpio/gpio-tz1090.txt: GPIO_ACTIVE_HIGH > Documentation/devicetree/bindings/gpio/gpio-tz1090.txt: GPIO_ACTIVE_LOW > Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt: GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. > Documentation/devicetree/bindings/input/gpio-beeper.txt: gpios = <&gpio3 23 GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/mmc/mmc.txt:also be specified using the OF_GPIO_ACTIVE_LOW flag. This creates an ambiguity > Documentation/devicetree/bindings/mmc/mmc.txt:OF_GPIO_ACTIVE_LOW flag clear and specifying the respective *-inverted > Documentation/devicetree/bindings/net/nfc/trf7970a.txt: ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>, > Documentation/devicetree/bindings/net/nfc/trf7970a.txt: <&gpio2 5 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/net/wireless/ti,wl1251.txt: ti,power-gpio = <&gpio3 23 GPIO_ACTIVE_HIGH>; /* 87 */ > Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt: GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. > Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt: gpios = <&pfc 20 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/power/isp1704.txt: nxp,enable-gpio = <&gpio3 3 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/sound/max98090.txt: interrupts = <TEGRA_GPIO(H, 4) GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/sound/rt5640.txt: interrupts = <TEGRA_GPIO(W, 3) GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/sound/rt5640.txt: <&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/sound/tpa6130a2.txt: power-gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt: reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/video/backlight/gpio-backlight.txt: gpios = <&gpio3 4 GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/video/panel-dsi-cm.txt: reset-gpios = <&gpio4 6 GPIO_ACTIVE_HIGH>; > Documentation/devicetree/bindings/video/sony,acx565akm.txt: reset-gpios = <&gpio3 26 GPIO_ACTIVE_HIGH>; /* 90 */ > Documentation/devicetree/bindings/video/ti,omap-dss.txt: gpios = <&gpio1 0 GPIO_ACTIVE_LOW>; /* 0, power-down */ > Documentation/devicetree/bindings/video/ti,omap-dss.txt: gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */ > Documentation/devicetree/bindings/video/ti,omap-dss.txt: <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */ > Documentation/devicetree/bindings/video/ti,omap-dss.txt: <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */ > Documentation/devicetree/bindings/video/ti,tfp410.txt: powerdown-gpios = <&twl_gpio 2 GPIO_ACTIVE_LOW>; > Documentation/devicetree/bindings/video/ti,tpd12s015.txt: gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */ > Documentation/devicetree/bindings/video/ti,tpd12s015.txt: <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */ > Documentation/devicetree/bindings/video/ti,tpd12s015.txt: <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */ > Documentation/devicetree/bindings/watchdog/gpio-wdt.txt: gpios = <&gpio3 9 GPIO_ACTIVE_LOW>; > > Richard. > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 15/04/2014 10:00, Ludovic Desroches wrote: > On Tue, Apr 15, 2014 at 09:39:59AM +0200, Richard Genoud wrote: >> On 14/04/2014 17:22, Ludovic Desroches wrote: >>> Hi Richard, >>> >>> On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: >>>> RTS pin is an active low pin. >>>> For now, this doesn't change anything as the ACTIVE_LOW flag is not >>>> handled in atmel_serial, but it will be in 3.16. >>>> >>>> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> >>>> --- >>>> Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- >>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>> >>>> diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt >>>> index 17c1042b2df8..2f7aad71b3c9 100644 >>>> --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt >>>> +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt >>>> @@ -35,7 +35,7 @@ Example: >>>> clock-names = "usart"; >>>> atmel,use-dma-rx; >>>> atmel,use-dma-tx; >>>> - rts-gpios = <&pioD 15 0>; >>>> + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; >>> >>> I was told we should not use macros here. If it is still the truth: >>> >>> rts-gpios = <&pioD 15 1>; >> >> But I'd really like to know if macros are forbidden in DT documentation and why... >> Because, IMHO, <&pioD 15 1> talks less that <&pioD 15 GPIO_ACTIVE_LOW>. >> Which is a shame in a documentation. > > I don't remember who told me that but the reason was that device tree > should not depend on Linux and macros are relative to Linux. > Well, that makes sense, but I thought that include/dt-bindings/ was more DT relative. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Apr 15, 2014 at 10:00 AM, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: > On Tue, Apr 15, 2014 at 09:39:59AM +0200, Richard Genoud wrote: >> On 14/04/2014 17:22, Ludovic Desroches wrote: >> > Hi Richard, >> > >> > On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: >> >> RTS pin is an active low pin. >> >> For now, this doesn't change anything as the ACTIVE_LOW flag is not >> >> handled in atmel_serial, but it will be in 3.16. >> >> >> >> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> >> >> --- >> >> Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- >> >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> >> >> diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt >> >> index 17c1042b2df8..2f7aad71b3c9 100644 >> >> --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt >> >> +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt >> >> @@ -35,7 +35,7 @@ Example: >> >> clock-names = "usart"; >> >> atmel,use-dma-rx; >> >> atmel,use-dma-tx; >> >> - rts-gpios = <&pioD 15 0>; >> >> + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; >> > >> > I was told we should not use macros here. If it is still the truth: >> > >> > rts-gpios = <&pioD 15 1>; >> >> But I'd really like to know if macros are forbidden in DT documentation and why... >> Because, IMHO, <&pioD 15 1> talks less that <&pioD 15 GPIO_ACTIVE_LOW>. >> Which is a shame in a documentation. > > I don't remember who told me that but the reason was that device tree > should not depend on Linux and macros are relative to Linux. These macros are not Linux-specific. They come from include/dt-bindings/* which is part of the OS-neutral bindings, just in a machine-readable form. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
2014-04-22 20:42 GMT+02:00 Linus Walleij <linus.walleij@linaro.org>: > On Tue, Apr 15, 2014 at 10:00 AM, Ludovic Desroches > <ludovic.desroches@atmel.com> wrote: >> On Tue, Apr 15, 2014 at 09:39:59AM +0200, Richard Genoud wrote: >>> On 14/04/2014 17:22, Ludovic Desroches wrote: >>> > Hi Richard, >>> > >>> > On Mon, Apr 14, 2014 at 04:58:02PM +0200, Richard Genoud wrote: >>> >> RTS pin is an active low pin. >>> >> For now, this doesn't change anything as the ACTIVE_LOW flag is not >>> >> handled in atmel_serial, but it will be in 3.16. >>> >> >>> >> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> >>> >> --- >>> >> Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- >>> >> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >> >>> >> diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt >>> >> index 17c1042b2df8..2f7aad71b3c9 100644 >>> >> --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt >>> >> +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt >>> >> @@ -35,7 +35,7 @@ Example: >>> >> clock-names = "usart"; >>> >> atmel,use-dma-rx; >>> >> atmel,use-dma-tx; >>> >> - rts-gpios = <&pioD 15 0>; >>> >> + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; >>> > >>> > I was told we should not use macros here. If it is still the truth: >>> > >>> > rts-gpios = <&pioD 15 1>; >>> >>> But I'd really like to know if macros are forbidden in DT documentation and why... >>> Because, IMHO, <&pioD 15 1> talks less that <&pioD 15 GPIO_ACTIVE_LOW>. >>> Which is a shame in a documentation. >> >> I don't remember who told me that but the reason was that device tree >> should not depend on Linux and macros are relative to Linux. > > These macros are not Linux-specific. > > They come from include/dt-bindings/* which is part of the OS-neutral > bindings, just in a machine-readable form. Thanks for this clarification ! Richard. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt index 17c1042b2df8..2f7aad71b3c9 100644 --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt +++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt @@ -35,7 +35,7 @@ Example: clock-names = "usart"; atmel,use-dma-rx; atmel,use-dma-tx; - rts-gpios = <&pioD 15 0>; + rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>; }; - use DMA:
RTS pin is an active low pin. For now, this doesn't change anything as the ACTIVE_LOW flag is not handled in atmel_serial, but it will be in 3.16. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> --- Documentation/devicetree/bindings/serial/atmel-usart.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)