Revert "ramips: increase spi-max-frequency for ipTIME mt7620 devices"

This reverts commit 13a185bf8acb67da4a68873e560876c0e60b1a87.

There was a report that one A1004ns device fails to detect its flash
chip correctly:

[    1.470297] spi-nor spi0.0: unrecognized JEDEC id bytes: e0 10 0c 40 10 08
[    1.484110] spi-nor: probe of spi0.0 failed with error -2

It also uses a different flash chip model:
* in my hand: Winbond W25Q128FVSIG (SOIC-8)
* reported: Macronix MX25L12845EMI-10G (SOP-16)

Reducing spi-max-frequency solved the detection failure. Hence revert.

Reported-by: Koasing <koasing@gmail.com>
Tested-by: Koasing <koasing@gmail.com>
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
(cherry picked from commit 9968a909c248169064446ed40e66d18986d93d11)

diff --git a/target/linux/ramips/dts/mt7620a_iptime.dtsi b/target/linux/ramips/dts/mt7620a_iptime.dtsi
index c7c90ca722c9ce403ac0e7c55ecfcaa860e695fe..5a6fdacb52977c95d3201decd6fd456945b9b750 100644 (file)
--- a/target/linux/ramips/dts/mt7620a_iptime.dtsi
+++ b/target/linux/ramips/dts/mt7620a_iptime.dtsi
@@ -21,7 +21,7 @@
        flash@0 {
                compatible = "jedec,spi-nor";
                reg = <0>;
-               spi-max-frequency = <50000000>;
+               spi-max-frequency = <40000000>;
 
                partitions {
                        compatible = "fixed-partitions";