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drivers: spi_dw: add HSSI register layout

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The Synopsys Designware SPI peripheral exists in two versions with
slightly different register layouts. Added a Kconfig option that makes the
driver compatible with the HSSI register layout.

Signed-off-by: Rafał Kuźnia <rafal.kuznia@nordicsemi.no>
This commit is contained in:
Rafał Kuźnia 2024-04-26 12:43:14 +02:00 committed by Carles Cufí
parent 35429debb6
commit 8ec1e0cdaf
2 changed files with 17 additions and 4 deletions
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6
drivers/spi/Kconfig.dw
View file

@ -20,4 +20,10 @@ config SPI_DW_ACCESS_WORD_ONLY
DesignWare SPI only allows word access, byte access will raise
exception.
config SPI_DW_HSSI
bool "Designware SPI HSSI variant"
help
Use register layout compatible with the SPI DW HSSI variant of the
peripheral.
endif # SPI_DW

15
drivers/spi/spi_dw.h
View file

@ -179,19 +179,26 @@ static int reg_test_bit(uint8_t bit, mm_reg_t addr, uint32_t off)
/* Common registers settings, bits etc... */
/* CTRLR0 settings */
#if !IS_ENABLED(CONFIG_SPI_DW_HSSI)
#define DW_SPI_CTRLR0_SCPH_BIT (6)
#define DW_SPI_CTRLR0_SCPOL_BIT (7)
#define DW_SPI_CTRLR0_TMOD_SHIFT (8)
#define DW_SPI_CTRLR0_SLV_OE_BIT (10)
#define DW_SPI_CTRLR0_SRL_BIT (11)
#else
/* The register layout is different in the HSSI variant */
#define DW_SPI_CTRLR0_SCPH_BIT (8)
#define DW_SPI_CTRLR0_SCPOL_BIT (9)
#define DW_SPI_CTRLR0_TMOD_SHIFT (10)
#define DW_SPI_CTRLR0_SLV_OE_BIT (12)
#define DW_SPI_CTRLR0_SRL_BIT (13)
#endif
#define DW_SPI_CTRLR0_SCPH BIT(DW_SPI_CTRLR0_SCPH_BIT)
#define DW_SPI_CTRLR0_SCPOL BIT(DW_SPI_CTRLR0_SCPOL_BIT)
#define DW_SPI_CTRLR0_SRL BIT(DW_SPI_CTRLR0_SRL_BIT)
#define DW_SPI_CTRLR0_SLV_OE_BIT (10)
#define DW_SPI_CTRLR0_SLV_OE BIT(DW_SPI_CTRLR0_SLV_OE_BIT)
#define DW_SPI_CTRLR0_TMOD_SHIFT (8)
#define DW_SPI_CTRLR0_TMOD_TX_RX (0)
#define DW_SPI_CTRLR0_TMOD_TX (1 << DW_SPI_CTRLR0_TMOD_SHIFT)
#define DW_SPI_CTRLR0_TMOD_RX (2 << DW_SPI_CTRLR0_TMOD_SHIFT)