diff mbox series

[v5,02/29] spi: Add SPI mode enums

Message ID 20200408165737.v5.2.I83a459a3914c56ca81dcdfa7e01d83c54f7ab914@changeid
State Superseded
Headers show
Series dm: Add programmatic generation of ACPI tables (part A) | expand

Commit Message

Simon Glass April 8, 2020, 10:57 p.m. UTC
With ACPI we need to describe the settings of the SPI bus. Add enums to
handle this.

Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner at br-automation.com>
---

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2:
- Don't bracket the definitions with DM_SPI
- Add trailing commas to enum

 include/spi.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

Comments

Bin Meng April 16, 2020, 5:33 a.m. UTC | #1
On Thu, Apr 9, 2020 at 6:57 AM Simon Glass <sjg at chromium.org> wrote:
>
> With ACPI we need to describe the settings of the SPI bus. Add enums to
> handle this.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> Reviewed-by: Wolfgang Wallner <wolfgang.wallner at br-automation.com>
> ---
>
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2:
> - Don't bracket the definitions with DM_SPI
> - Add trailing commas to enum
>
>  include/spi.h | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>

applied to u-boot-x86, thanks!
diff mbox series

Patch

diff --git a/include/spi.h b/include/spi.h
index 852f570eaa8..2b4929fc79d 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -66,6 +66,39 @@  struct dm_spi_slave_platdata {
 
 #endif /* CONFIG_DM_SPI */
 
+/**
+ * enum spi_clock_phase - indicates  the clock phase to use for SPI (CPHA)
+ *
+ * @SPI_CLOCK_PHASE_FIRST: Data sampled on the first phase
+ * @SPI_CLOCK_PHASE_SECOND: Data sampled on the second phase
+ */
+enum spi_clock_phase {
+	SPI_CLOCK_PHASE_FIRST,
+	SPI_CLOCK_PHASE_SECOND,
+};
+
+/**
+ * enum spi_wire_mode - indicates the number of wires used for SPI
+ *
+ * @SPI_4_WIRE_MODE: Normal bidirectional mode with MOSI and MISO
+ * @SPI_3_WIRE_MODE: Unidirectional version with a single data line SISO
+ */
+enum spi_wire_mode {
+	SPI_4_WIRE_MODE,
+	SPI_3_WIRE_MODE,
+};
+
+/**
+ * enum spi_polarity - indicates the polarity of the SPI bus (CPOL)
+ *
+ * @SPI_POLARITY_LOW: Clock is low in idle state
+ * @SPI_POLARITY_HIGH: Clock is high in idle state
+ */
+enum spi_polarity {
+	SPI_POLARITY_LOW,
+	SPI_POLARITY_HIGH,
+};
+
 /**
  * struct spi_slave - Representation of a SPI slave
  *