Messages in this thread | | | Date | Wed, 20 Nov 2013 18:05:29 +0100 | From | boris brezillon <> | Subject | Re: [PATCH 1/9] ARM: at91/dt: add rm9200 spi0 chip select pins definitions |
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On 20/11/2013 16:59, boris brezillon wrote: > On 20/11/2013 15:56, Jean-Christophe PLAGNIOL-VILLARD wrote: >> On 13:02 Wed 28 Aug , Boris BREZILLON wrote: >>> Add spi0 cs pinctrl pins definitions. >>> >>> Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> >>> --- >>> arch/arm/boot/dts/at91rm9200.dtsi | 20 ++++++++++++++++++++ >>> 1 file changed, 20 insertions(+) >>> >>> diff --git a/arch/arm/boot/dts/at91rm9200.dtsi >>> b/arch/arm/boot/dts/at91rm9200.dtsi >>> index f770655..69b76c7 100644 >>> --- a/arch/arm/boot/dts/at91rm9200.dtsi >>> +++ b/arch/arm/boot/dts/at91rm9200.dtsi >>> @@ -486,6 +486,26 @@ >>> AT91_PIOA 1 AT91_PERIPH_A >>> AT91_PINCTRL_NONE /* PA1 periph A SPI0_MOSI pin */ >>> AT91_PIOA 2 AT91_PERIPH_A >>> AT91_PINCTRL_NONE>; /* PA2 periph A SPI0_SPCK pin */ >>> }; >>> + >>> + pinctrl_spi0_cs0: spi0_cs0-0 { >>> + atmel,pins = >>> + <AT91_PIOA 3 AT91_PERIPH_A >>> AT91_PINCTRL_NONE>; /* PA3 periph A SPI0_NPCS0 pin */ >>> + }; >>> + >>> + pinctrl_spi0_cs1: spi0_cs1-0 { >>> + atmel,pins = >>> + <AT91_PIOA 4 AT91_PERIPH_GPIO >>> AT91_PINCTRL_MULTI_DRIVE>; /* PA4 GPIO SPI0_NPCS1 pin */ >>> + }; >>> + >>> + pinctrl_spi0_cs2: spi0_cs2-0 { >>> + atmel,pins = >>> + <AT91_PIOA 5 AT91_PERIPH_GPIO >>> AT91_PINCTRL_MULTI_DRIVE>; /* PA5 GPIO SPI0_NPCS2 pin */ >>> + }; >>> + >>> + pinctrl_spi0_cs3: spi0_cs3-0 { >>> + atmel,pins = >>> + <AT91_PIOA 6 AT91_PERIPH_GPIO >>> AT91_PINCTRL_MULTI_DRIVE>; /* PA6 GPIO SPI0_NPCS3 pin */ >>> + }; >> nack the pin are not multidrive there is only one master > Right, this is a mistake. > > But the pins should be configured as OUTPUT with HIGH level > (see > http://lxr.free-electrons.com/source/arch/arm/mach-at91/at91rm9200_devices.c#L589). >
Okay, my mistake again, declaring "cs-gpios" property should suffice (the atmel spi driver will configure it accordingly when probing the spi device).
> >> >> Best Regards, >> J. >>> }; >>> pioA: gpio@fffff400 { >>> -- >>> 1.7.9.5 >>> > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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