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| author | Arnd Bergmann <arnd@arndb.de> | 2014-01-14 11:44:09 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2014-01-29 20:23:22 +0100 |
| commit | 0e4b949e6620689b1d3142e20bca2c9d1f918fda (patch) | |
| tree | 90aa8eada5e819852c0d6be12be7cf25c6615e57 /drivers/net/can/flexcan.c | |
| parent | c044dc2132d19d8c643cdd340f21afcec177c046 (diff) | |
| download | talos-op-linux-0e4b949e6620689b1d3142e20bca2c9d1f918fda.tar.gz talos-op-linux-0e4b949e6620689b1d3142e20bca2c9d1f918fda.zip | |
can: flexcan: fix flexcan driver build for big endian on ARM and little endian on PowerPc
There is no reason to disallow building the driver on big-endian ARM kernels.
Furthermore, the current behavior is actually broken on little-endian PowerPC
as well.
The choice of register accessor functions must purely depend on the CPU
architecture, not which endianess the CPU is running on. Note that we nowadays
allow both big-endian ARM and little-endian PowerPC kernels.
With this patch applied, we will do the right thing in all four combinations.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/flexcan.c')
| -rw-r--r-- | drivers/net/can/flexcan.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index aaed97bee471..320bef2dba42 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -235,9 +235,12 @@ static const struct can_bittiming_const flexcan_bittiming_const = { }; /* - * Abstract off the read/write for arm versus ppc. + * Abstract off the read/write for arm versus ppc. This + * assumes that PPC uses big-endian registers and everything + * else uses little-endian registers, independent of CPU + * endianess. */ -#if defined(__BIG_ENDIAN) +#if defined(CONFIG_PPC) static inline u32 flexcan_read(void __iomem *addr) { return in_be32(addr); |
