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acpi: Support generation of SPI descriptor

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Add a function to write a SPI descriptor to the generated ACPI code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-07-07 13:11:49 -06:00 • committed by Bin Meng
parent 31e1787ec1
commit 70e5e67a4d
5 changed files with 212 additions and 2 deletions
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4
include/spi.h
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@ -13,8 +13,8 @@
#include <linux/bitops.h>
/* SPI mode flags */
#define SPI_CPHA BIT(0) /* clock phase */
#define SPI_CPOL BIT(1) /* clock polarity */
#define SPI_CPHA BIT(0) /* clock phase (1 = SPI_CLOCK_PHASE_SECOND) */
#define SPI_CPOL BIT(1) /* clock polarity (1 = SPI_POLARITY_HIGH) */
#define SPI_MODE_0 (0|0) /* (original MicroWire) */
#define SPI_MODE_1 (0|SPI_CPHA)
#define SPI_MODE_2 (SPI_CPOL|0)