On Tuesday 10 December 2013 06:27 PM, Marek Vasut wrote:
On Friday, December 06, 2013 at 03:24:45 PM, Sourav Poddar wrote:These add api to configure set up registers which will be used for memory mapped operations. These was provided as a pointer in the earlier patch and can be used by the slave devices to configure the master controller as an when required according to the usecases. Signed-off-by: Sourav Poddar<sourav.poddar@xxxxxx> --- drivers/spi/spi-ti-qspi.c | 29 +++++++++++++++++++++++++++++ 1 files changed, 29 insertions(+), 0 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 48294d1..e4a8afc 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -117,6 +117,10 @@ struct ti_qspi { #define MEM_CS (1<< 8) #define MEM_CS_DIS (0<< 8) +#define QSPI_SETUP0_RD_NORMAL (0x0<< 12) +#define QSPI_SETUP0_RD_DUAL (0x1<< 12) +#define QSPI_SETUP0_RD_QUAD (0x3<< 12) + #define QSPI_FRAME 4096 #define QSPI_AUTOSUSPEND_TIMEOUT 2000 @@ -220,6 +224,30 @@ static int ti_qspi_setup(struct spi_device *spi) return 0; } +static void ti_qspi_configure_from_slave(struct spi_device *spi) +{ + struct ti_qspi *qspi = spi_master_get_devdata(spi->master); + struct slave_info info = spi->info; + u32 memval, mode; + + mode = spi->mode& (SPI_RX_DUAL | SPI_RX_QUAD); + memval = (info.read_opcode<< 0) | (info.program_opcode<< 16) | + ((info.addr_width - 1)<< 8) | (info.dummy_cycles<< 10); + + switch (mode) { + case SPI_RX_DUAL: + memval |= QSPI_SETUP0_RD_DUAL; + break; + case SPI_RX_QUAD: + memval |= QSPI_SETUP0_RD_QUAD; + break; + default:You want to catch invalid/unsupported mode here instead, so please add 'case 0:' for 1-bit transfer and treat default: as an error .
Ok. make sense. will change that in v3.
+ memval |= QSPI_SETUP0_RD_NORMAL; + break; + } + ti_qspi_write(qspi, memval, QSPI_SPI_SETUP0_REG); +} + static void ti_qspi_restore_ctx(struct ti_qspi *qspi) { struct ti_qspi_regs *ctx_reg =&qspi->ctx_reg; @@ -488,6 +516,7 @@ static int ti_qspi_probe(struct platform_device *pdev) master->dev.of_node = pdev->dev.of_node; master->bits_per_word_mask = BIT(32 - 1) | BIT(16 - 1) | BIT(8 - 1); master->mmap = true; + master->configure_from_slave = ti_qspi_configure_from_slave; if (!of_property_read_u32(np, "num-cs",&num_cs)) master->num_chipselect = num_cs;Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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