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drivers: staging: fbtft: fbtft-bus.c: Fix different address space warning on I/O mem

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To fix sparse warning of incorrect type in assignment
(different address space), added annotation __iomem to
vmem8 and modified direct reads with ioread8().

Signed-off-by: Tolga Ceylan <tolga.ceylan@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tolga Ceylan 2015-05-01 23:40:35 -07:00 • committed by Greg Kroah-Hartman
parent bae97e8110
commit 02eb884f4e
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/fbtft/fbtft-bus.c
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@ -184,7 +184,7 @@ EXPORT_SYMBOL(fbtft_write_vmem16_bus8);
/* 16 bit pixel over 9-bit SPI bus: dc + high byte, dc + low byte */
int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len)
{
u8 *vmem8;
u8 __iomem *vmem8;
u16 *txbuf16 = par->txbuf.buf;
size_t remain;
size_t to_copy;
@ -212,12 +212,12 @@ int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len)
#ifdef __LITTLE_ENDIAN
for (i = 0; i < to_copy; i += 2) {
txbuf16[i] = 0x0100 | vmem8[i+1];
txbuf16[i+1] = 0x0100 | vmem8[i];
txbuf16[i] = 0x0100 | ioread8(vmem8 + i + 1);
txbuf16[i + 1] = 0x0100 | ioread8(vmem8 + i);
}
#else
for (i = 0; i < to_copy; i++)
txbuf16[i] = 0x0100 | vmem8[i];
txbuf16[i] = 0x0100 | ioread8(vmem8 + i);
#endif
vmem8 = vmem8 + to_copy;
ret = par->fbtftops.write(par, par->txbuf.buf, to_copy*2);