On 27-08-2013 15:04, Marek Vasut wrote:
Dear Jagan Teki,
Hi
On Tue, Aug 27, 2013 at 2:51 PM, Marek Vasut marex@denx.de wrote:
Dear Jagan Teki,
Hi,
On Tue, Aug 27, 2013 at 2:35 PM, Marek Vasut marex@denx.de wrote:
Dear Stefano Babic,
On 26/08/2013 17:45, Marek Vasut wrote: > The chipselect must be written into the CTRL0 register after the > SSP block is reset, otherwise the block will always use ChipSelect > #0. > > Signed-off-by: Marek Vasut marex@denx.de > Cc: Fabio Estevam fabio.estevam@freescale.com > Cc: Jagannadha Sutradharudu Teki jagannadh.teki@gmail.com > Cc: Otavio Salvador otavio@ossystems.com.br > Cc: Stefano Babic sbabic@denx.de > --- > > drivers/spi/mxs_spi.c | 12 +++--------- > 1 file changed, 3 insertions(+), 9 deletions(-) > > V2: Clean up a warning that "ssp_regs" are not used > > diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c > index 3cf7142..2b9f395 100644 > --- a/drivers/spi/mxs_spi.c > +++ b/drivers/spi/mxs_spi.c > @@ -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;
Acked-by: Stefano Babic sbabic@denx.de
Can we push this via IMX tree ?
I have a simple concern about commit head msg. spi: mxs: spi: mxs_spi:
I preferred the second one as rest are follow the same, just for unification. Please send the v2, if your OK. then I will push it on my tree.
Can you fix that before pushing? I am fine either way.
OK, sure I will do that.
Thanks a lot!
Best regards, Marek Vasut
Applied to u-boot-spi/master
-- Thanks, Jagan.