diff options
| -rw-r--r-- | src/soc/cavium/cn81xx/include/soc/spi.h | 1 | ||||
| -rw-r--r-- | src/soc/cavium/cn81xx/spi.c | 21 |
2 files changed, 22 insertions, 0 deletions
diff --git a/src/soc/cavium/cn81xx/include/soc/spi.h b/src/soc/cavium/cn81xx/include/soc/spi.h index bb69daac91..33f0f2988b 100644 --- a/src/soc/cavium/cn81xx/include/soc/spi.h +++ b/src/soc/cavium/cn81xx/include/soc/spi.h @@ -29,6 +29,7 @@ void spi_set_clock(const size_t bus, const size_t speed_hz, const size_t idle_low, const size_t idle_cycles); +uint64_t spi_get_clock(const size_t bus); void spi_set_lsbmsb(const size_t bus, const size_t lsb_first); void spi_init_custom(const size_t bus, const size_t speed_hz, diff --git a/src/soc/cavium/cn81xx/spi.c b/src/soc/cavium/cn81xx/spi.c index 5a5865e36e..6527f22ea1 100644 --- a/src/soc/cavium/cn81xx/spi.c +++ b/src/soc/cavium/cn81xx/spi.c @@ -218,6 +218,27 @@ void spi_set_clock(const size_t bus, } /** + * Get current SPI clock frequency in Hz. + * + * @param bus The SPI bus to operate on + */ +uint64_t spi_get_clock(const size_t bus) +{ + union cavium_spi_cfg cfg; + + assert(bus < ARRAY_SIZE(cavium_spi_slaves)); + if (bus >= ARRAY_SIZE(cavium_spi_slaves)) + return 0; + + struct cavium_spi *regs = cavium_spi_slaves[bus].regs; + const uint64_t sclk = thunderx_get_io_clock(); + + cfg.u = read64(®s->cfg); + + return (sclk / (2ULL * cfg.s.clkdiv)); +} + +/** * Set SPI LSB/MSB first. * * @param bus The SPI bus to operate on |