[PATCH] spi: cadence-qspi: Move ref clock calculation to probe

[Pratyush Yadav]

"assigned-clock-parents" and "assigned-clock-rates" DT properties take
effect only after ofdata_to_platdata() when clk_set_defaults() is called
in device_probe(). Therefore clk get rate() would return a wrong value
in ofdata_to_platdata() when compared with probe. Hence it needs to be
moved to probe.

Tested on u-boot-ti/next.

Signed-off-by: Pratyush Yadav <p.ya...@ti.com>
---
 drivers/spi/cadence_qspi.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index 83b114ffe7..994a5948f1 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -166,11 +166,28 @@ static int cadence_spi_probe(struct udevice *bus)
 {
        struct cadence_spi_platdata *plat = bus->platdata;
        struct cadence_spi_priv *priv = dev_get_priv(bus);
+       struct clk clk;
        int ret;
 
        priv->regbase = plat->regbase;
        priv->ahbbase = plat->ahbbase;
 
+       if (plat->ref_clk_hz == 0) {
+               ret = clk_get_by_index(bus, 0, &clk);
+               if (ret) {
+#ifdef CONFIG_CQSPI_REF_CLK
+                       plat->ref_clk_hz = CONFIG_CQSPI_REF_CLK;
+#else
+                       return ret;
+#endif
+               } else {
+                       plat->ref_clk_hz = clk_get_rate(&clk);
+                       clk_free(&clk);
+                       if (IS_ERR_VALUE(plat->ref_clk_hz))
+                               return plat->ref_clk_hz;
+               }
+       }
+
        ret = reset_get_bulk(bus, &priv->resets);
        if (ret)
                dev_warn(bus, "Can't get reset: %d\n", ret);
@@ -268,8 +285,6 @@ static int cadence_spi_ofdata_to_platdata(struct udevice 
*bus)
 {
        struct cadence_spi_platdata *plat = bus->platdata;
        ofnode subnode;
-       struct clk clk;
-       int ret;
 
        plat->regbase = (void *)devfdt_get_addr_index(bus, 0);
        plat->ahbbase = (void *)devfdt_get_addr_size_index(bus, 1,
@@ -305,20 +320,6 @@ static int cadence_spi_ofdata_to_platdata(struct udevice 
*bus)
        plat->tchsh_ns = ofnode_read_u32_default(subnode, "cdns,tchsh-ns", 20);
        plat->tslch_ns = ofnode_read_u32_default(subnode, "cdns,tslch-ns", 20);
 
-       ret = clk_get_by_index(bus, 0, &clk);
-       if (ret) {
-#ifdef CONFIG_CQSPI_REF_CLK
-               plat->ref_clk_hz = CONFIG_CQSPI_REF_CLK;
-#else
-               return ret;
-#endif
-       } else {
-               plat->ref_clk_hz = clk_get_rate(&clk);
-               clk_free(&clk);
-               if (IS_ERR_VALUE(plat->ref_clk_hz))
-                       return plat->ref_clk_hz;
-       }
-
        debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
              __func__, plat->regbase, plat->ahbbase, plat->max_hz,
              plat->page_size);
-- 
2.25.0