diff options
| -rw-r--r-- | arch/arm/include/asm/arch-kirkwood/spi.h | 11 | ||||
| -rw-r--r-- | drivers/spi/kirkwood_spi.c | 36 |
2 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-kirkwood/spi.h b/arch/arm/include/asm/arch-kirkwood/spi.h index 1d5043f94f..c79bed7ed9 100644 --- a/arch/arm/include/asm/arch-kirkwood/spi.h +++ b/arch/arm/include/asm/arch-kirkwood/spi.h @@ -37,6 +37,17 @@ struct kwspi_registers { u32 irq_mask; /* 0x10614 */ }; +/* They are used to define CONFIG_SYS_KW_SPI_MPP + * each of the below #defines selects which mpp is + * configured for each SPI signal in spi_claim_bus + * bit 0: selects pin for MOSI (MPP1 if 0, MPP6 if 1) + * bit 1: selects pin for SCK (MPP2 if 0, MPP10 if 1) + * bit 2: selects pin for MISO (MPP3 if 0, MPP11 if 1) + */ +#define MOSI_MPP6 (1 << 0) +#define SCK_MPP10 (1 << 1) +#define MISO_MPP11 (1 << 2) + #define KWSPI_CLKPRESCL_MASK 0x1f #define KWSPI_CSN_ACT 1 /* Activates serial memory interface */ #define KWSPI_SMEMRDY (1 << 1) /* SerMem Data xfer ready */ diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c index 01e1d11972..db4bb0ae61 100644 --- a/drivers/spi/kirkwood_spi.c +++ b/drivers/spi/kirkwood_spi.c @@ -83,13 +83,49 @@ void spi_free_slave(struct spi_slave *slave) free(slave); } +#if defined(CONFIG_SYS_KW_SPI_MPP) +u32 spi_mpp_backup[4]; +#endif + int spi_claim_bus(struct spi_slave *slave) { +#if defined(CONFIG_SYS_KW_SPI_MPP) + u32 config; + u32 spi_mpp_config[4]; + + config = CONFIG_SYS_KW_SPI_MPP; + + if (config & MOSI_MPP6) + spi_mpp_config[0] = MPP6_SPI_MOSI; + else + spi_mpp_config[0] = MPP1_SPI_MOSI; + + if (config & SCK_MPP10) + spi_mpp_config[1] = MPP10_SPI_SCK; + else + spi_mpp_config[1] = MPP2_SPI_SCK; + + if (config & MISO_MPP11) + spi_mpp_config[2] = MPP11_SPI_MISO; + else + spi_mpp_config[2] = MPP3_SPI_MISO; + + spi_mpp_config[3] = 0; + spi_mpp_backup[3] = 0; + + /* set new spi mpp and save current mpp config */ + kirkwood_mpp_conf(spi_mpp_config, spi_mpp_backup); + +#endif + return 0; } void spi_release_bus(struct spi_slave *slave) { +#if defined(CONFIG_SYS_KW_SPI_MPP) + kirkwood_mpp_conf(spi_mpp_backup, NULL); +#endif } #ifndef CONFIG_SPI_CS_IS_VALID |
