| Masahiro Yamada | da333ae | 2014-10-23 22:26:09 +0900 | [diff] [blame] | 1 | config DM_SPI |
| 2 | bool "Enable Driver Model for SPI drivers" |
| 3 | depends on DM |
| 4 | help |
| Simon Glass | f94a1be | 2015-02-05 21:41:35 -0700 | [diff] [blame] | 5 | Enable driver model for SPI. The SPI slave interface |
| 6 | (spi_setup_slave(), spi_xfer(), etc.) is then implemented by |
| 7 | the SPI uclass. Drivers provide methods to access the SPI |
| 8 | buses that they control. The uclass interface is defined in |
| 9 | include/spi.h. The existing spi_slave structure is attached |
| 10 | as 'parent data' to every slave on each bus. Slaves |
| 11 | typically use driver-private data instead of extending the |
| 12 | spi_slave structure. |
| Simon Glass | 892cac7 | 2015-03-06 13:19:05 -0700 | [diff] [blame] | 13 | |
| 14 | config SANDBOX_SPI |
| 15 | bool "Sandbox SPI driver" |
| 16 | depends on SANDBOX && DM |
| 17 | help |
| 18 | Enable SPI support for sandbox. This is an emulation of a real SPI |
| 19 | bus. Devices can be attached to the bus using the device tree |
| 20 | which specifies the driver to use. As an example, see this device |
| 21 | tree fragment from sandbox.dts. It shows that the SPI bus has a |
| 22 | single flash device on chip select 0 which is emulated by the driver |
| 23 | for "sandbox,spi-flash", which is in drivers/mtd/spi/sandbox.c. |
| 24 | |
| 25 | spi@0 { |
| 26 | #address-cells = <1>; |
| 27 | #size-cells = <0>; |
| 28 | reg = <0>; |
| 29 | compatible = "sandbox,spi"; |
| 30 | cs-gpios = <0>, <&gpio_a 0>; |
| 31 | flash@0 { |
| 32 | reg = <0>; |
| 33 | compatible = "spansion,m25p16", "sandbox,spi-flash"; |
| 34 | spi-max-frequency = <40000000>; |
| 35 | sandbox,filename = "spi.bin"; |
| 36 | }; |
| 37 | }; |