linux-kernel - RE: [PATCH] ARM: dts: imx7d-pinfunc: add input mux for UART2 RX DTE mode

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Date:	Thu, 5 May 2016 20:29:05 +0000
From:	Frank Li <frank.li@....com>
To:	Stefan Agner <stefan@...er.ch>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>,
	Fugang Duan <fugang.duan@....com>
CC:	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"Frank.Li@...escale.com" <Frank.Li@...escale.com>,
	"aalonso@...escale.com" <aalonso@...escale.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] ARM: dts: imx7d-pinfunc: add input mux for UART2 RX DTE
 mode



> -----Original Message-----
> From: Stefan Agner [mailto:stefan@...er.ch]
> Sent: Thursday, May 05, 2016 3:12 PM
> To: shawnguo@...nel.org
> Cc: kernel@...gutronix.de; Frank.Li@...escale.com;
> aalonso@...escale.com; devicetree@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; Stefan Agner
> <stefan@...er.ch>
> Subject: [PATCH] ARM: dts: imx7d-pinfunc: add input mux for UART2 RX DTE
> mode
> 
> Add input mux for UART2 RX in DTE mode. This allows to use the pad
> UART2_TX_DATA_ALT0 as UART2 RX. This particular input select seems to be
> missing in current reference manuals (Rev. B), but when looking at the tables
> and other UART input select registers (e.g. UART3) it seems naturally that this
> input mux register also has a fourth pad option for UART2_TX_DATA_ALT0. It
> has also been proven to be required to use UART2 in DTE mode and the
> particular pads on the Colibri iMX7 platform.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>

Acked-by: Frank Li  <Frank.Li@....com>

> ---
>  arch/arm/boot/dts/imx7d-pinfunc.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/imx7d-pinfunc.h b/arch/arm/boot/dts/imx7d-
> pinfunc.h
> index eeda783..3f9f0d9 100644
> --- a/arch/arm/boot/dts/imx7d-pinfunc.h
> +++ b/arch/arm/boot/dts/imx7d-pinfunc.h
> @@ -594,7 +594,7 @@
>  #define MX7D_PAD_UART2_RX_DATA__GPIO4_IO2                         0x0130
> 0x03A0 0x0000 0x5 0x0
>  #define MX7D_PAD_UART2_RX_DATA__ENET2_MDIO                        0x0130
> 0x03A0 0x0000 0x6 0x0
>  #define MX7D_PAD_UART2_TX_DATA__UART2_DCE_TX                      0x0134
> 0x03A4 0x0000 0x0 0x0
> -#define MX7D_PAD_UART2_TX_DATA__UART2_DTE_RX                      0x0134
> 0x03A4 0x0000 0x0 0x0
> +#define MX7D_PAD_UART2_TX_DATA__UART2_DTE_RX                      0x0134
> 0x03A4 0x06FC 0x0 0x3
>  #define MX7D_PAD_UART2_TX_DATA__I2C2_SDA                          0x0134
> 0x03A4 0x05E0 0x1 0x0
>  #define MX7D_PAD_UART2_TX_DATA__SAI3_RX_DATA0                     0x0134
> 0x03A4 0x06C8 0x2 0x0
>  #define MX7D_PAD_UART2_TX_DATA__ECSPI1_RDY                        0x0134
> 0x03A4 0x0000 0x3 0x0
> --
> 2.8.2