Support loading clk speed via DM instead of requiring ad-hoc code.
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschm...@gmail.com>
---
drivers/spi/cadence_qspi.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index e2e54cd277..0b89115885 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -5,6 +5,7 @@
*/
#include <common.h>
+#include <clk.h>
#include <dm.h>
#include <fdtdec.h>
#include <malloc.h>
@@ -22,12 +23,27 @@ static int cadence_spi_write_speed(struct udevice *bus,
uint hz)
{
struct cadence_spi_platdata *plat = bus->platdata;
struct cadence_spi_priv *priv = dev_get_priv(bus);
+ unsigned int ref_clk_hz;
+ struct clk clk;
+ int ret;
+
+ ret = clk_get_by_index(bus, 0, &clk);
+ if (ret) {
+#ifdef CONFIG_CQSPI_REF_CLK
+ ref_clk_hz = CONFIG_CQSPI_REF_CLK;
+#else
+ return ret;
+#endif
+ } else {
+ ref_clk_hz = clk_get_rate(&clk);
+ clk_free(&clk);
+ }
cadence_qspi_apb_config_baudrate_div(priv->regbase,
- CONFIG_CQSPI_REF_CLK, hz);
+ ref_clk_hz, hz);
/* Reconfigure delay timing if speed is changed. */
- cadence_qspi_apb_delay(priv->regbase, CONFIG_CQSPI_REF_CLK, hz,
+ cadence_qspi_apb_delay(priv->regbase, ref_clk_hz, hz,
plat->tshsl_ns, plat->tsd2d_ns,
plat->tchsh_ns, plat->tslch_ns);
--
2.20.1
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
