CONFIG_SYS_CLK_FREQ is the standard way to set the system clock frequency. On MPC83xx, CONFIG_83XX_CLKIN is used for this purpose. Hence, the obvious way is to replace CONFIG_83XX_CLKIN with CONFIG_SYS_CLK_FREQ.
A few MPC83xx boards use the CONFIG_83XX_CLKIN variable for computing CONFIG_SYS_NS16550_CLK. This makes it harder to replace CONFIG_83XX_CLKIN.
But the value of the multiplicator can be read from the SPMR register.
Hence, replace the static calculations with a call to a new get_bus_freq function, as other architectures do.
Signed-off-by: Mario Six mario.six@gdsys.cc --- arch/powerpc/cpu/mpc83xx/spl_minimal.c | 8 ++++++++ include/configs/MPC8315ERDB.h | 2 +- include/configs/ids8313.h | 2 +- 3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/cpu/mpc83xx/spl_minimal.c b/arch/powerpc/cpu/mpc83xx/spl_minimal.c index 746f1febba..3315ee05e1 100644 --- a/arch/powerpc/cpu/mpc83xx/spl_minimal.c +++ b/arch/powerpc/cpu/mpc83xx/spl_minimal.c @@ -89,3 +89,11 @@ void puts(const char *str) while (*str) putc(*str++); } + +ulong get_bus_freq(ulong dummy) +{ + volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; + u8 spmf = (im->clk.spmr & SPMR_SPMF) >> SPMR_SPMF_SHIFT; + + return CONFIG_83XX_CLKIN * spmf; +} diff --git a/include/configs/MPC8315ERDB.h b/include/configs/MPC8315ERDB.h index dd60ce8538..8466e867bb 100644 --- a/include/configs/MPC8315ERDB.h +++ b/include/configs/MPC8315ERDB.h @@ -274,7 +274,7 @@ */ #define CONFIG_SYS_NS16550_SERIAL #define CONFIG_SYS_NS16550_REG_SIZE 1 -#define CONFIG_SYS_NS16550_CLK (CONFIG_83XX_CLKIN * 2) +#define CONFIG_SYS_NS16550_CLK (get_bus_freq(0))
#define CONFIG_SYS_BAUDRATE_TABLE \ {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200} diff --git a/include/configs/ids8313.h b/include/configs/ids8313.h index 6a222e9757..b371b3b1ba 100644 --- a/include/configs/ids8313.h +++ b/include/configs/ids8313.h @@ -315,7 +315,7 @@ {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 115200} #define CONFIG_SYS_NS16550_COM1 (CONFIG_SYS_IMMR + 0x4500) #define CONFIG_SYS_NS16550_COM2 (CONFIG_SYS_IMMR + 0x4600) -#define CONFIG_SYS_NS16550_CLK (CONFIG_83XX_CLKIN * 2) +#define CONFIG_SYS_NS16550_CLK (get_bus_freq(0))
#define CONFIG_HAS_FSL_DR_USB #define CONFIG_SYS_SCCR_USBDRCM 3