diff options
| -rw-r--r-- | drivers/spi/spi-cadence-quadspi.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index 4219113cf36b..676313e1bdad 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -1119,6 +1119,14 @@ static void cqspi_config_baudrate_div(struct cqspi_st *cqspi) /* Recalculate the baudrate divisor based on QSPI specification. */ div = DIV_ROUND_UP(ref_clk_hz, 2 * cqspi->sclk) - 1; + /* Maximum baud divisor */ + if (div > CQSPI_REG_CONFIG_BAUD_MASK) { + div = CQSPI_REG_CONFIG_BAUD_MASK; + dev_warn(&cqspi->pdev->dev, + "Unable to adjust clock <= %d hz. Reduced to %d hz\n", + cqspi->sclk, ref_clk_hz/((div+1)*2)); + } + reg = readl(reg_base + CQSPI_REG_CONFIG); reg &= ~(CQSPI_REG_CONFIG_BAUD_MASK << CQSPI_REG_CONFIG_BAUD_LSB); reg |= (div & CQSPI_REG_CONFIG_BAUD_MASK) << CQSPI_REG_CONFIG_BAUD_LSB; |