From: York Sun <yorksun@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v4 3/9] kmp204x: I2C deblocking support
Date: Mon, 3 Feb 2014 12:26:00 -0800 [thread overview]
Message-ID: <52EFFB58.80706@freescale.com> (raw)
In-Reply-To: <1391413540-13244-1-git-send-email-valentin.longchamp@keymile.com>
On 02/02/2014 11:45 PM, Valentin Longchamp wrote:
> From: Rainer Boschung <rainer.boschung@keymile.com>
>
> This patch adds support for using some GPIOs that are connected to the
> I2C bus to force the bus lines state and perform some bus deblocking
> sequences.
>
> The KM common deblocking algorithm from board/keymile/common/common.c is
> used. The GPIO lines used for deblocking the I2C bus are some external
> GPIOs provided by the QRIO CPLD:
> - SCL = GPIOA_20
> - SDA = GPIOA_21
>
> The QRIO GPIOs act in an open-drain-like manner, for 0 the line is
> driven low and for 1 the GPIO is set as input and the line gets
> pulled-up.
>
> Signed-off-by: Rainer Boschung <rainer.boschung@keymile.com>
> Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
>
> ---
>
> Changes in v4:
> - fix usage of the #define names that got wrong in the merge process
>
> Changes in v3:
> - rewrite the commit message and and the comments for more clarity
> - fix the GPIO numbers that where not correct
>
> Changes in v2: None
>
Applied to u-boot-mpc85xx master branch.
York
next prev parent reply other threads:[~2014-02-03 20:26 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 10:49 [U-Boot] [PATCH v2 0/9] Further support for the kmp204x architecture Valentin Longchamp
2014-01-27 10:49 ` [U-Boot] [PATCH v2 1/9] kmp204x: support for QRIO1 bootcounter Valentin Longchamp
2014-02-03 20:22 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 2/9] kmp204x: introduce QRIO GPIO functions Valentin Longchamp
2014-02-03 20:23 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 3/9] kmp204x: I2C deblocking for I2C-bus1 added Valentin Longchamp
2014-01-30 2:30 ` York Sun
2014-01-30 7:32 ` Valentin Longchamp
2014-01-30 9:17 ` Boschung, Rainer
2014-01-30 17:40 ` York Sun
2014-01-31 12:46 ` [U-Boot] [PATCH v3 3/9] kmp204x: I2C deblocking support Valentin Longchamp
2014-01-31 17:41 ` York Sun
2014-02-03 7:45 ` [U-Boot] [PATCH v4 " Valentin Longchamp
2014-02-03 20:26 ` York Sun [this message]
2014-01-27 10:49 ` [U-Boot] [PATCH v2 4/9] kmp204x: implement workaround for A-006559 Valentin Longchamp
2014-02-03 20:23 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 5/9] kmp204x: add support for the kmcoge4 board Valentin Longchamp
2014-02-03 20:23 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 6/9] kmp204x: update I2C field of RCW Valentin Longchamp
2014-02-03 20:24 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 7/9] KM: add the KM_UBI_PART_BOOT_OPTS #define Valentin Longchamp
2014-02-03 20:24 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 8/9] kmp204x: enable support for SPANSION SPI NOR Valentin Longchamp
2014-02-03 20:25 ` York Sun
2014-01-27 10:49 ` [U-Boot] [PATCH v2 9/9] kmp204x: initial support for PCIe FPGA configuration Valentin Longchamp
2014-02-03 20:25 ` York Sun
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