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4 commits

Author SHA1 Message Date
Aaron Ye a94422f686 drivers: spi: Fix the Ambiq apollo4p SPI transmission failure. 
The instruction length can only be 0~5.
Use am_hal_iom_blocking_transfer and specify clearly the TX/RX direction.
Hold CS to continue to RX expected response after instruction transmission.

Signed-off-by: Aaron Ye <aye@ambiq.com>
 2023-10-03 15:24:20 +01:00
Aaron Ye 7cf21d1080 drivers: spi: Fix Ambiq apollo4p SPI reconfiguration. 
The configured SPI should not be configured again.
Otherwise it would cause SPI transmission failure.

Signed-off-by: Aaron Ye <aye@ambiq.com>
 2023-10-03 15:24:20 +01:00
Aaron Ye 4e7d1b0f74 drivers: spi: Fix Ambiq apollo4p SPI mode configuration. 
The commit fixes the SPI mode improper configuration.
Otherwise the MODE_3 and MODE_0 cases would never be entered as expected.

Signed-off-by: Aaron Ye <aye@ambiq.com>
 2023-10-03 15:24:20 +01:00
Mateusz Sierszulski 2b74109f20 drivers: spi: Add Ambiq SPI driver 
This commits adds SPI master driver for Apollo4 SoCs.

Signed-off-by: Mateusz Sierszulski <msierszulski@antmicro.com>
 2023-08-25 10:31:58 +02:00