[U-Boot] [PATCH v2 3/8] spi: cadence_qspi: Better debug information on the SPI clock rate

Phil Edworthy phil.edworthy at renesas.com
Fri Nov 25 15:38:03 CET 2016


Show what the output clock rate actually is.

Signed-off-by: Phil Edworthy <phil.edworthy at renesas.com>
---
 drivers/spi/cadence_qspi_apb.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index b9e0df7..3ae4b5a 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -281,13 +281,13 @@ void cadence_qspi_apb_config_baudrate_div(void *reg_base,
 	div = DIV_ROUND_UP(ref_clk_hz, sclk_hz);
 	div = DIV_ROUND_UP(div, 2) - 1;
 
-	debug("%s: ref_clk %dHz sclk %dHz Div 0x%x\n", __func__,
-	      ref_clk_hz, sclk_hz, div);
-
 	/* ensure the baud rate doesn't exceed the max value */
 	if (div > CQSPI_REG_CONFIG_BAUD_MASK)
 		div = CQSPI_REG_CONFIG_BAUD_MASK;
 
+	debug("%s: ref_clk %dHz sclk %dHz Div 0x%x, actual %dHz\n", __func__,
+	      ref_clk_hz, sclk_hz, div, ref_clk_hz / (2 * (div + 1)));
+
 	reg |= (div << CQSPI_REG_CONFIG_BAUD_LSB);
 	writel(reg, reg_base + CQSPI_REG_CONFIG);
 
-- 
2.7.4



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