[PATCH 3/3] spi: imx: Use clock framework if enabled

[Marek Vasut]

In case the clock framework is enabled, enable the SPI controller clock
and obtain max frequency from the clock framework.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Jagan Teki <jagan at amarulasolutions.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 drivers/spi/mxc_spi.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c
index 849808fb916..3377200d24f 100644
--- a/drivers/spi/mxc_spi.c
+++ b/drivers/spi/mxc_spi.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <log.h>
 #include <malloc.h>
@@ -617,8 +618,19 @@ static int mxc_spi_probe(struct udevice *bus)
 	if (mxcs->base == FDT_ADDR_T_NONE)
 		return -ENODEV;
 
+#if CONFIG_IS_ENABLED(CLK)
+	struct clk clk;
+	ret = clk_get_by_index(bus, 0, &clk);
+	if (ret)
+		return ret;
+
+	clk_enable(&clk);
+
+	mxcs->max_hz = clk_get_rate(&clk);
+#else
 	mxcs->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
 				      20000000);
+#endif
 
 	return 0;
 }
-- 
2.29.2