From: Laxman Dewangan <ldewangan@nvidia.com>
To: w.sang@pengutronix.de, ben-linux@fluff.org,
swarren@wwwdotorg.org, olof@lixom.net
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
Laxman Dewangan <ldewangan@nvidia.com>
Subject: [PATCH V1 1/2] i2c: tegra: fix 10bit address configuration
Date: Tue, 24 Apr 2012 12:49:35 +0530 [thread overview]
Message-ID: <1335251976-31925-2-git-send-email-ldewangan@nvidia.com> (raw)
In-Reply-To: <1335251976-31925-1-git-send-email-ldewangan@nvidia.com>
The slave address of device to be configured in packet
header as follows:
7 bit address: PacketHeader3[7:1]
10 bit address: PacketHeader3[9:0]
Fixing the code to make packet header3 properly.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
drivers/i2c/busses/i2c-tegra.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 55e5ea6..18067b3 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -476,12 +476,15 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
packet_header = msg->len - 1;
i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
- packet_header = msg->addr << I2C_HEADER_SLAVE_ADDR_SHIFT;
- packet_header |= I2C_HEADER_IE_ENABLE;
+ packet_header = I2C_HEADER_IE_ENABLE;
if (!stop)
packet_header |= I2C_HEADER_REPEAT_START;
- if (msg->flags & I2C_M_TEN)
+ if (msg->flags & I2C_M_TEN) {
+ packet_header |= msg->addr;
packet_header |= I2C_HEADER_10BIT_ADDR;
+ } else {
+ packet_header |= msg->addr << I2C_HEADER_SLAVE_ADDR_SHIFT;
+ }
if (msg->flags & I2C_M_IGNORE_NAK)
packet_header |= I2C_HEADER_CONT_ON_NAK;
if (msg->flags & I2C_M_RD)
@@ -557,7 +560,7 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
static u32 tegra_i2c_func(struct i2c_adapter *adap)
{
- return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR;
}
static const struct i2c_algorithm tegra_i2c_algo = {
--
1.7.1.1
next prev parent reply other threads:[~2012-04-24 7:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-24 7:19 [PATCH V1 0/2] i2c: tegra: 10 bit and M_NOSTART support Laxman Dewangan
2012-04-24 7:19 ` Laxman Dewangan [this message]
[not found] ` <1335251976-31925-2-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-04-24 8:58 ` [PATCH V1 1/2] i2c: tegra: fix 10bit address configuration Jean Delvare
[not found] ` <20120424105815.1d9e7d95-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2012-05-03 6:13 ` Laxman Dewangan
[not found] ` <4FA221FA.2030305-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-05-03 8:18 ` Wolfram Sang
[not found] ` <20120503081830.GA9574-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2012-05-03 8:20 ` Laxman Dewangan
[not found] ` <1335251976-31925-1-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-04-24 7:19 ` [PATCH V1 2/2] i2c: tegra: support for I2C_M_NOSTART protocol mangling Laxman Dewangan
[not found] ` <1335251976-31925-3-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-04-24 8:55 ` Jean Delvare
[not found] ` <20120424105557.7ac07232-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2012-04-24 9:21 ` Laxman Dewangan
[not found] ` <4F967089.3050004-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-04-24 11:38 ` Mark Brown
2012-04-24 12:32 ` Jean Delvare
[not found] ` <20120424143241.0d66fd2e-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2012-04-24 12:40 ` Mark Brown
[not found] ` <20120424124030.GD13747-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
2012-04-24 13:01 ` Wolfram Sang
[not found] ` <20120424130118.GD4030-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2012-04-24 13:07 ` Jean Delvare
[not found] ` <20120424150750.36f8c2fc-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2012-04-24 13:28 ` Wolfram Sang
2012-05-10 11:24 ` Laxman Dewangan
[not found] ` <4FABA585.7090600-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-05-10 11:54 ` Jean Delvare
[not found] ` <20120510135411.3ba5bb6d-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2012-05-10 12:20 ` Laxman Dewangan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1335251976-31925-2-git-send-email-ldewangan@nvidia.com \
--to=ldewangan@nvidia.com \
--cc=ben-linux@fluff.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=olof@lixom.net \
--cc=swarren@wwwdotorg.org \
--cc=w.sang@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).