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kw_spi: add weak functions board_spi_claim/release_bus 

This allows a final, board specific, step in the claim/relase_bus
function for the SPI controller, which may be needed for some hardware
designs.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
This commit is contained in:
Valentin Longchamp 2012-06-01 01:31:03 +00:00 committed by Albert ARIBAUD
parent ac486e3ba1
commit 24934fea0c
1 changed files with 12 additions and 1 deletions
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13
drivers/spi/kirkwood_spi.c
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@ -87,6 +87,11 @@ void spi_free_slave(struct spi_slave *slave)
u32 spi_mpp_backup[4]; u32 spi_mpp_backup[4];
#endif #endif
__attribute__((weak)) int board_spi_claim_bus(struct spi_slave *slave)
{
return 0;
}
int spi_claim_bus(struct spi_slave *slave) int spi_claim_bus(struct spi_slave *slave)
{ {
#if defined(CONFIG_SYS_KW_SPI_MPP) #if defined(CONFIG_SYS_KW_SPI_MPP)
@ -118,7 +123,11 @@ int spi_claim_bus(struct spi_slave *slave)
#endif #endif
return 0; return board_spi_claim_bus(slave);
}
__attribute__((weak)) void board_spi_release_bus(struct spi_slave *slave)
{
} }
void spi_release_bus(struct spi_slave *slave) void spi_release_bus(struct spi_slave *slave)
@ -126,6 +135,8 @@ void spi_release_bus(struct spi_slave *slave)
#if defined(CONFIG_SYS_KW_SPI_MPP) #if defined(CONFIG_SYS_KW_SPI_MPP)
kirkwood_mpp_conf(spi_mpp_backup, NULL); kirkwood_mpp_conf(spi_mpp_backup, NULL);
#endif #endif
board_spi_release_bus(slave);
} }
#ifndef CONFIG_SPI_CS_IS_VALID #ifndef CONFIG_SPI_CS_IS_VALID