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| author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-04-14 10:38:37 +0200 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-04-14 10:38:37 +0200 |
| commit | 8dc16cf9dd6196d99969d12741df186a61a2f9a3 (patch) | |
| tree | 9a708a8fc9cfaa2cedbcb60900d72c3807b3e522 /drivers/spi/mxc_spi.c | |
| parent | f84a7b8f54db51172a50926be8b2224413977f75 (diff) | |
| parent | 0f1411bc8dade4472ca802f46f75714e67301bb0 (diff) | |
| download | u-boot-imx-8dc16cf9dd6196d99969d12741df186a61a2f9a3.zip u-boot-imx-8dc16cf9dd6196d99969d12741df186a61a2f9a3.tar.gz u-boot-imx-8dc16cf9dd6196d99969d12741df186a61a2f9a3.tar.bz2 | |
Merge branch 'u-boot-imx/master' into 'u-boot-arm/master'
Diffstat (limited to 'drivers/spi/mxc_spi.c')
| -rw-r--r-- | drivers/spi/mxc_spi.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c index cb48019..5bed858 100644 --- a/drivers/spi/mxc_spi.c +++ b/drivers/spi/mxc_spi.c @@ -137,11 +137,15 @@ static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs, return -1; } - /* Reset spi */ - reg_write(®s->ctrl, 0); - reg_write(®s->ctrl, MXC_CSPICTRL_EN); - - reg_ctrl = reg_read(®s->ctrl); + /* + * Reset SPI and set all CSs to master mode, if toggling + * between slave and master mode we might see a glitch + * on the clock line + */ + reg_ctrl = MXC_CSPICTRL_MODE_MASK; + reg_write(®s->ctrl, reg_ctrl); + reg_ctrl |= MXC_CSPICTRL_EN; + reg_write(®s->ctrl, reg_ctrl); /* * The following computation is taken directly from Freescale's code. @@ -174,9 +178,6 @@ static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs, reg_ctrl = (reg_ctrl & ~MXC_CSPICTRL_POSTDIV(0x0F)) | MXC_CSPICTRL_POSTDIV(post_div); - /* always set to master mode */ - reg_ctrl |= 1 << (cs + 4); - /* We need to disable SPI before changing registers */ reg_ctrl &= ~MXC_CSPICTRL_EN; |