In order to work appropriately, the max11043 ADC chip and probably others, needs SPI master samples the data at the correct edge. From max11043 datasheet: "The data at DIN is latched on the rising edge of SCLK". Same to DOUT.
This patch add Master Sample Data Mode bit in normal sample mode. Signed-off-by: Vinicius Maciel <[email protected]> --- drivers/spi/spi-sun4i.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-sun4i.c b/drivers/spi/spi-sun4i.c index c5cd635c28f3..6325be2ce8d9 100644 --- a/drivers/spi/spi-sun4i.c +++ b/drivers/spi/spi-sun4i.c @@ -44,6 +44,7 @@ #define SUN4I_CTL_CS_MANUAL BIT(16) #define SUN4I_CTL_CS_LEVEL BIT(17) #define SUN4I_CTL_TP BIT(18) +#define SUN4I_CTL_SDM BIT(20) #define SUN4I_INT_CTL_REG 0x0c #define SUN4I_INT_CTL_RF_F34 BIT(4) @@ -407,7 +408,8 @@ static int sun4i_spi_runtime_resume(struct device *dev) } sun4i_spi_write(sspi, SUN4I_CTL_REG, - SUN4I_CTL_ENABLE | SUN4I_CTL_MASTER | SUN4I_CTL_TP); + SUN4I_CTL_ENABLE | SUN4I_CTL_MASTER | SUN4I_CTL_TP | + SUN4I_CTL_SDM); return 0; -- 2.11.0 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
