diff options
Diffstat (limited to 'bsps/arm/imxrt/spi/imxrt-lpspi.c')
| -rw-r--r-- | bsps/arm/imxrt/spi/imxrt-lpspi.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/bsps/arm/imxrt/spi/imxrt-lpspi.c b/bsps/arm/imxrt/spi/imxrt-lpspi.c index 7e812d9894..aed4f07f88 100644 --- a/bsps/arm/imxrt/spi/imxrt-lpspi.c +++ b/bsps/arm/imxrt/spi/imxrt-lpspi.c @@ -477,12 +477,15 @@ static int imxrt_lpspi_setup(spi_bus *base) return rv; } -static uint32_t imxrt_lpspi_get_src_freq(void) +static uint32_t imxrt_lpspi_get_src_freq(clock_ip_name_t clock_ip) { uint32_t freq; +#if IMXRT_IS_MIMXRT10xx uint32_t mux; uint32_t divider; + (void) clock_ip; /* Not necessary for i.MXRT1050 */ + mux = CLOCK_GetMux(kCLOCK_LpspiMux); switch (mux) { @@ -504,6 +507,17 @@ static uint32_t imxrt_lpspi_get_src_freq(void) divider = CLOCK_GetDiv(kCLOCK_LpspiDiv) + 1; freq /= divider; +#elif IMXRT_IS_MIMXRT11xx + /* + * FIXME: A future version of the mcux_sdk might provide a better method to + * get the clock instead of this hack. + */ + clock_root_t clock_root = clock_ip + kCLOCK_Root_Lpspi1 - kCLOCK_Lpspi1; + + freq = CLOCK_GetRootClockFreq(clock_root); +#else + #error Getting SPI frequency is not implemented for this chip. +#endif return freq; } @@ -580,7 +594,7 @@ void imxrt_lpspi_init(void) } bus->clock_ip = imxrt_lpspi_clock_ip(bus->regs); - bus->src_clock_hz = imxrt_lpspi_get_src_freq(); + bus->src_clock_hz = imxrt_lpspi_get_src_freq(bus->clock_ip); /* Absolut maximum is 30MHz according to electrical characteristics */ bus->base.max_speed_hz = MIN(bus->src_clock_hz / 2, 30000000); bus->base.delay_usecs = 0; |