Add the SPI / UART switch logic into the Tegra2 SPI driver so that it can co-exist with the NS16550 UART.
We need the ns16550.h header for NS16550_t for now.
Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v2: - Add pinmux logic to SPI driver - Rename uart/spi_enable() to pinmux_select_uart/spi()
drivers/spi/tegra2_spi.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/spi/tegra2_spi.c b/drivers/spi/tegra2_spi.c index 1ad7161..86a64df 100644 --- a/drivers/spi/tegra2_spi.c +++ b/drivers/spi/tegra2_spi.c @@ -28,9 +28,11 @@ #include <spi.h> #include <asm/io.h> #include <asm/gpio.h> +#include <ns16550.h> #include <asm/arch/clk_rst.h> #include <asm/arch/clock.h> #include <asm/arch/pinmux.h> +#include <asm/arch/uart-spi-switch.h> #include <asm/arch/tegra2_spi.h>
struct tegra_spi_slave { @@ -139,6 +141,16 @@ int spi_claim_bus(struct spi_slave *slave) */ pinmux_set_func(PINGRP_GMD, PMUX_FUNC_SFLASH); pinmux_tristate_disable(PINGRP_LSPI); + +#ifndef CONFIG_SPI_UART_SWITCH + /* + * NOTE: + * Only set PinMux bits 3:2 to SPI here on boards that don't have the + * SPI UART switch or subsequent UART data won't go out! See + * spi_uart_switch(). + */ + /* TODO: pinmux_set_func(PINGRP_GMC, PMUX_FUNC_SFLASH); */ +#endif return 0; }
@@ -156,6 +168,8 @@ void spi_cs_activate(struct spi_slave *slave) { struct tegra_spi_slave *spi = to_tegra_spi(slave);
+ pinmux_select_spi(); + /* CS is negated on Tegra, so drive a 1 to get a 0 */ setbits_le32(&spi->regs->command, SPI_CMD_CS_VAL); }