linux-toradex.git/include/linux/i2c-pnx.h, branch v3.12.45 Linux kernel for Apalis and Colibri modules i2c: pnx: Fix read transactions of >= 2 bytes 2012-09-12T15:52:44+00:00 Roland Stigge stigge@antcom.de 2012-08-08T07:42:32+00:00 c076ada4e4aaf45e1a31ad6de7c6cce36081e045 On transactions with n>=2 bytes, the controller actually wrongly clocks in n+1 bytes. This is caused by the (wrong) assumption that RFE in the Status Register is 1 iff there is no byte already ordered (via a dummy TX byte). This lead to the implementation of synchronized byte ordering, e.g.: Dummy-TX - RX - Dummy-TX - RX - ... But since RFE actually stays high after some Dummy-TX, it rather looks like: Dummy-TX - Dummy-TX - RX - Dummy-TX - RX - (RX) The last RX byte is clocked in by the bus controller, but ignored by the kernel when filling the userspace buffer. This patch fixes the issue by asking for RX via Dummy-TX asynchronously. Introducing a separate counter for TX bytes. Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> 
On transactions with n>=2 bytes, the controller actually wrongly clocks in n+1
bytes. This is caused by the (wrong) assumption that RFE in the Status Register
is 1 iff there is no byte already ordered (via a dummy TX byte). This lead to
the implementation of synchronized byte ordering, e.g.:

Dummy-TX - RX - Dummy-TX - RX - ...

But since RFE actually stays high after some Dummy-TX, it rather looks like:

Dummy-TX - Dummy-TX - RX - Dummy-TX - RX - (RX)

The last RX byte is clocked in by the bus controller, but ignored by the kernel
when filling the userspace buffer.

This patch fixes the issue by asking for RX via Dummy-TX asynchronously.
Introducing a separate counter for TX bytes.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: Add device tree support to i2c-pnx.c 2012-04-22T09:59:47+00:00 Roland Stigge stigge@antcom.de 2012-04-22T09:59:47+00:00 b41a216dafe4dd23c95cb4203de288f773a097a6 This patch adds device tree support to the pnx-i2c driver by using platform resources for memory region and irq and removing dependency on mach includes. The following platforms are affected: * PNX * LPC31xx (WIP) * LPC32xx The patch is based on a patch by Jon Smirl, working on lpc31xx integration Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> 
This patch adds device tree support to the pnx-i2c driver by using platform
resources for memory region and irq and removing dependency on mach includes.

The following platforms are affected:

* PNX
* LPC31xx (WIP)
* LPC32xx

The patch is based on a patch by Jon Smirl, working on lpc31xx integration

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-pnx.c: Use resources in platforms 2012-04-22T09:59:47+00:00 Roland Stigge stigge@antcom.de 2012-04-22T09:59:47+00:00 1451ba3a5fa52d874e03a3380d053f3e6a5fcae4 As a precondition for device tree conversion, the platforms using i2c-pnx.c are converted to using mem and irq resources instead of platform data. Signed-off-by: Roland Stigge <stigge@antcom.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> 
As a precondition for device tree conversion, the platforms using i2c-pnx.c are
converted to using mem and irq resources instead of platform data.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
ARM: PNX4008: move i2c_adapter structure inside the drivers private data 2010-02-12T17:32:41+00:00 Russell King rmk+kernel@arm.linux.org.uk 2009-11-21T12:25:27+00:00 9d7f73632c87ef1b6187eb539d1efd63c3cf0e36 Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: PNX4008: kzalloc i2c drivers internal data 2010-02-12T17:32:40+00:00 Russell King rmk+kernel@arm.linux.org.uk 2009-11-21T12:10:54+00:00 44c5d739181886cff8e3903dfa38cd704f3d9640 Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: PNX4008: Make ioaddr 'void __iomem *' rather than 'u32' 2010-02-12T17:32:40+00:00 Russell King rmk+kernel@arm.linux.org.uk 2009-11-21T11:58:36+00:00 88d968b22fa26d5e3a8cab46fc7c3a21c89a91d3 This avoids unnecessary casting. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This avoids unnecessary casting.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: PNX4008: get i2c clock rate from clk API 2010-02-12T17:32:39+00:00 Russell King rmk+kernel@arm.linux.org.uk 2009-11-20T12:46:07+00:00 6fff3da998ac3cc9ed8a84bf4f19911bd63c8c32 Acked-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Acked-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: PNX4008: move i2c clock start/stop into driver 2010-02-12T17:32:39+00:00 Russell King rmk+kernel@arm.linux.org.uk 2009-11-20T11:12:26+00:00 0321cb83e1c3f3a4282bd620c6cec78c5b80b572 Acked-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Acked-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: PNX4008: move i2c suspend/resume callbacks into driver 2010-02-12T17:32:38+00:00 Russell King rmk+kernel@arm.linux.org.uk 2009-11-20T10:50:34+00:00 a0dcf19f59d4f37150a6b7e115925d72aca15293 Acked-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Acked-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
i2c: i2c-pnx: Made buf type unsigned to prevent sign extension 2009-11-20T00:25:42+00:00 Kevin Wells kevin.wells@nxp.com 2009-11-11T23:23:00+00:00 4ced24c8973f79113444d1e00ee8bd9e74fbf43e Made buf type unsigned to prevent sign extension Signed-off-by: Kevin Wells <kevin.wells@nxp.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org> 
Made buf type unsigned to prevent sign extension

Signed-off-by: Kevin Wells <kevin.wells@nxp.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>