On Tue, 16 Jun 2015 12:59:07 +0200 Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx> wrote: > The patch > > crypto: caam - Add definition of rd/wr_reg64 for little endian platform > > added support for little endian platforms to the CAAM driver. Namely a > write and read function for 64 bit registers. > The only user of this functions is the Job Ring driver (drivers/crypto/caam/jr.c). > It uses the functions to set the DMA addresses for the input/output rings. > However, at least in the default configuration, the least significant 32 bits are > always in the base+0x0004 address; independent of the endianness of the bytes itself. > That means the addresses do not change with the system endianness. > > DMA addresses are only 32 bits wide on non-64-bit systems, writing the upper 32 bits > of this value to the register for the least significant bits results in the DMA address > being set to 0. > > Fix this by always writing the registers in the same way. > > Suggested-by: Russell King <linux@xxxxxxxxxxxxxxxx> > Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx> > --- > > This patch is only compile-tested for PowerPC and tested on ARM. > According to the datasheets for i.MX6 and P1010 this should be correct, though. I can confirm that this patch works on both QorIQ/PowerPC and ARM devices. -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
