From: maxime.ripard@free-electrons.com (Maxime Ripard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 7/7] ARM: dts: cfa10049: Add the 74HC595 gpio expanders
Date: Mon, 10 Sep 2012 11:27:48 +0200 [thread overview]
Message-ID: <504DB294.7050309@free-electrons.com> (raw)
In-Reply-To: <20120910022342.GR26709@S2101-09.ap.freescale.net>
Hi Shawn,
Le 10/09/2012 04:23, Shawn Guo a ?crit :
> On Fri, Sep 07, 2012 at 02:18:16PM +0200, Maxime Ripard wrote:
>> ---
>> arch/arm/boot/dts/imx28-cfa10049.dts | 21 +++++++++++++++++++++
>> 1 file changed, 21 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/imx28-cfa10049.dts b/arch/arm/boot/dts/imx28-cfa10049.dts
>> index 1f7fa50..05c892e 100644
>> --- a/arch/arm/boot/dts/imx28-cfa10049.dts
>> +++ b/arch/arm/boot/dts/imx28-cfa10049.dts
>> @@ -27,6 +27,8 @@
>> fsl,pinmux-ids = <
>> 0x0181 /* MX28_PAD_GPMI_RDN__SSP3_SCK */
>> 0x01c1 /* MX28_PAD_GPMI_RESETN__SSP3_CMD */
>> + 0x0111 /* MX28_PAD_GPMI_CE1N__SSP3_D3 */
>> + 0x01a2 /* MX28_PAD_GPMI_ALE__SSP3_D4 */
>
> What are these two pins used for?
The SSP_D3, D4 and D5 are used as chip select 0, 1 and 2 by the SSP
controller when it runs in the two SPI (motorola and Winbond) modes.
Thus, here, I'm using them as chip selects.
Maxime
--
Maxime Ripard, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
prev parent reply other threads:[~2012-09-10 9:27 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 12:18 [PATCHv2 0/7] gpios: Add daisy-chaining and dt support to 74x164 Maxime Ripard
2012-09-07 12:18 ` [PATCH 1/7] gpio: 74x164: Use module_spi_driver boiler plate function Maxime Ripard
2012-09-07 12:18 ` [PATCH 2/7] gpio: 74x164: Use devm_kzalloc Maxime Ripard
2012-09-07 12:18 ` [PATCH 3/7] gpio: 74x164: Use dynamic gpio number assignment if no pdata is present Maxime Ripard
2012-09-07 14:01 ` Florian Fainelli
2012-09-07 21:04 ` Linus Walleij
2012-09-07 12:18 ` [PATCH 4/7] gpio: 74x164: Add device tree support Maxime Ripard
2012-09-07 21:05 ` Linus Walleij
2012-09-07 12:18 ` [PATCH 5/7] gpio: 74x164: Add support for the daisy-chaining Maxime Ripard
2012-09-07 14:03 ` Florian Fainelli
2012-09-07 21:08 ` Linus Walleij
2012-09-07 21:07 ` Linus Walleij
2012-09-10 1:51 ` Shawn Guo
2012-09-11 16:57 ` Linus Walleij
2012-09-12 2:07 ` Shawn Guo
2012-09-07 12:18 ` [PATCH 6/7] gpio: 74x164: dts: Add documentation for the dt binding Maxime Ripard
2012-09-07 12:18 ` [PATCH 7/7] ARM: dts: cfa10049: Add the 74HC595 gpio expanders Maxime Ripard
2012-09-10 2:23 ` Shawn Guo
2012-09-10 9:27 ` Maxime Ripard [this message]
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