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Merge branch 'master' of git://git.denx.de/u-boot-spi

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This commit is contained in:
Tom Rini 2013-09-16 20:02:50 -04:00
commit bc23d96b75
2 changed files with 15 additions and 10 deletions
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13
common/cmd_sf.c
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@ -152,8 +152,10 @@ static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
{
debug("offset=%#x, sector_size=%#x, len=%#zx\n",
offset, flash->sector_size, len);
if (spi_flash_read(flash, offset, len, cmp_buf))
/* Read the entire sector so to allow for rewriting */
if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
return "read";
/* Compare only what is meaningful (len) */
if (memcmp(cmp_buf, buf, len) == 0) {
debug("Skip region %x size %zx: no change\n",
offset, len);
@ -163,8 +165,17 @@ static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
/* Erase the entire sector */
if (spi_flash_erase(flash, offset, flash->sector_size))
return "erase";
/* Write the initial part of the block from the source */
if (spi_flash_write(flash, offset, len, buf))
return "write";
/* If it's a partial sector, rewrite the existing part */
if (len != flash->sector_size) {
/* Rewrite the original data to the end of the sector */
if (spi_flash_write(flash, offset + len,
flash->sector_size - len, &cmp_buf[len]))
return "write";
}
return NULL;
}

12
drivers/spi/mxs_spi.c
View File

@ -56,8 +56,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
struct mxs_spi_slave *mxs_slave;
struct mxs_ssp_regs *ssp_regs;
int reg;
if (!spi_cs_is_valid(bus, cs)) {
printf("mxs_spi: invalid bus %d / chip select %d\n", bus, cs);
@ -74,13 +72,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
mxs_slave->max_khz = max_hz / 1000;
mxs_slave->mode = mode;
mxs_slave->regs = mxs_ssp_regs_by_bus(bus);
ssp_regs = mxs_slave->regs;
reg = readl(&ssp_regs->hw_ssp_ctrl0);
reg &= ~(MXS_SSP_CHIPSELECT_MASK);
reg |= cs << MXS_SSP_CHIPSELECT_SHIFT;
writel(reg, &ssp_regs->hw_ssp_ctrl0);
return &mxs_slave->slave;
err_init:
@ -102,7 +94,9 @@ int spi_claim_bus(struct spi_slave *slave)
mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
writel(SSP_CTRL0_BUS_WIDTH_ONE_BIT, &ssp_regs->hw_ssp_ctrl0);
writel((slave->cs << MXS_SSP_CHIPSELECT_SHIFT) |
SSP_CTRL0_BUS_WIDTH_ONE_BIT,
&ssp_regs->hw_ssp_ctrl0);
reg = SSP_CTRL1_SSP_MODE_SPI | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS;
reg |= (mxs_slave->mode & SPI_CPOL) ? SSP_CTRL1_POLARITY : 0;