linux-kernel - Re: [PATCH v2] gpio/xilinx: Use correct address when setting initial values.

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Date:	Thu, 16 Jul 2015 13:28:18 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Raphaël Teysseyre <rteysseyre@...il.com>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Michal Simek <michal.simek@...inx.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...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 v2] gpio/xilinx: Use correct address when setting initial values.

On Wed, Jun 24, 2015 at 9:19 AM, Raphaël Teysseyre <rteysseyre@...il.com> wrote:

> xgpio_save_regs() is used in this driver to setup the initial
> values of the registers in the hardware.
>
> The relevant registers at that time are:
> 0x0 -> channel 0 data (32 bits, one for each GPIO on this channel).
> 0x4 -> channel 0 tri, controls in/out status for each GPIO of this channel.
> 0x8 -> channel 1 data
> 0xC -> channel 1 tri
>
> gpio-xilinx.c defines these:
> XGPIO_DATA_OFFSET   (0x0)
> XGPIO_TRI_OFFSET    (0x4)
> XGPIO_CHANNEL_OFFSET    0x8
>
> Before this patch, the "data" register value of channel 1 was written
> at 0x4 intead of 0x8 (overwriting the channel 0 "tri" register),
> and the "tri" register value for channel 1 was written at 0x8 instead of 0xC.
>
> Signed-off-by: Raphaël Teysseyre <rteysseyre@...il.com>

Patch applied with review tags.

Yours,
Linus Walleij
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