Currently the flexcan driver uses hardware local echo. This blindly
echos all transmitted frames to all receiving sockets, regardless what
CAN_RAW_RECV_OWN_MSGS and CAN_RAW_LOOPBACK are set to.

This patch now submits transmitted frames to be echoed in the transmit
complete interrupt, preserving the reference to the sending
socket. This allows the can protocol to correctly handle the local
echo.

Further this patch moves tx_bytes statistic accounting into the tx_complete
handler.
Signed-off-by: NReuben Dowle <reuben.dowle@navico.com>
[mkl: move tx_bytes accounting into tx_complete handler; cleanups]
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

The patch converts flexcan driver to clk_prepare/clk_unprepare by
using helper functions clk_prepare_enable/clk_disable_unprepare.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: David S. Miller <davem@davemloft.net>

This patch converts the drivers in drivers/net/can/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Bhupesh Sharma <bhupesh.sharma@st.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Kurt Van Dijck <kurt.van.dijck@eia.be>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If our CAN device's device tree node has a clock-frequency property,
then use that value for the can devices clock frequency.  If not, fall
back to asking the platform/mach code for the clock frequency associated
with the flexcan device.
Signed-off-by: NRobin Holt <holt@sgi.com>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>,
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>,
Cc: U Bhaskar-B22300 <B22300@freescale.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: socketcan-core@lists.berlios.de,
Cc: netdev@vger.kernel.org,
Cc: PPC list <linuxppc-dev@lists.ozlabs.org>
Cc: devicetree-discuss@lists.ozlabs.org
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

On powerpc, the OpenFirmware devices are not matched without specifying
an of_match array.  Introduce that array as that is used for matching
on the Freescale P1010 processor.
Signed-off-by: NRobin Holt <holt@sgi.com>
Acked-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Cc: U Bhaskar-B22300 <B22300@freescale.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: socketcan-core@lists.berlios.de
Cc: netdev@vger.kernel.org
Cc: PPC list <linuxppc-dev@lists.ozlabs.org>
Cc: devicetree-discuss@lists.ozlabs.org
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Make flexcan driver handle register reads in the appropriate endianess.
This was a basic search and replace and then define some inlines.
Signed-off-by: NRobin Holt <holt@sgi.com>
Acked-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Cc: U Bhaskar-B22300 <B22300@freescale.com>
Cc: socketcan-core@lists.berlios.de
Cc: netdev@vger.kernel.org
Cc: PPC list <linuxppc-dev@lists.ozlabs.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

powerpc does not have a mach-####/clock.h.  When testing, I found neither
arm nor powerpc needed the mach/clock.h at all so I removed it.
Signed-off-by: NRobin Holt <holt@sgi.com>
Acked-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Cc: U Bhaskar-B22300 <B22300@freescale.com>
Cc: socketcan-core@lists.berlios.de
Cc: netdev@vger.kernel.org
Cc: PPC list <linuxppc-dev@lists.ozlabs.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The failed_get label is used after the call to clk_get has succeeded, so it
should be moved up above the call to clk_put.

The failed_req labels doesn't do anything different than failed_get, so
delete it.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression e1,e2;
statement S;
@@

e1 = clk_get@p1(...);
... when != e1 = e2
    when != clk_put(e1)
    when any
if (...) { ... when != clk_put(e1)
               when != if (...) { ... clk_put(e1) ... }
* return@p3 ...;
 } else S
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The priv is part of the memory allocated by alloc_candev().
This patch moved the free it after last usage of priv.
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This core is found on some Freescale SoCs and also some Coldfire
SoCs. Support for Coldfire is missing though at the moment as
they have an older revision of the core which does not have RX FIFO
support.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>