On 02/17/2015 03:29 PM, Simon Glass wrote:
At present the driver does not properly honour the requested SPI CS
deactivation delay since the SPI bus is changed in the claim_bus() method.
Everything the claim_bus() method does can be done when the device is probed
(setting the speed and mode) and at the start of a new transfer (where the
fifo_status is already cleared). So drop this method.
Also, until the delay is complete, we should not touch the bus, so make sure
that spi_cs_activate() is called before other things are done in the xfer()
method.
diff --git a/drivers/spi/tegra114_spi.c b/drivers/spi/tegra114_spi.c
- setbits_le32(®s->command1, SPI_CMD1_M_S | SPI_CMD1_CS_SW_HW |
- (priv->mode << SPI_CMD1_MODE_SHIFT));
...
+ setbits_le32(&priv->regs->command1, SPI_CMD1_M_S | SPI_CMD1_CS_SW_HW |
+ (priv->mode << SPI_CMD1_MODE_SHIFT) | SPI_CMD1_CS_SW_VAL);
Is that addition of SPI_CMD1_CS_SW_VAL there relative to the old code
intended?
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