ramips: add back the missing periph clock for Ralink RT3883

periph clock is the parent clock of some other clocks.

Link: https://lore.kernel.org/all/CAMhs-H_NS-n2tx5SZpCMiVZtBFzX_nTa_vnS8We0UevkwFq93Q@mail.gmail.com/
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
Link: https://github.com/openwrt/openwrt/pull/16318
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

2 files changed, 55 insertions, 10 deletions

diff --git a/target/linux/ramips/dts/rt3883.dtsi b/target/linux/ramips/dts/rt3883.dtsi
index de89645406..30c0916785 100644
--- a/target/linux/ramips/dts/rt3883.dtsi
+++ b/target/linux/ramips/dts/rt3883.dtsi
@@ -51,7 +51,7 @@
 			compatible = "ralink,rt2880-timer";
 			reg = <0x100 0x20>;
 
-			clocks = <&sysc 3>;
+			clocks = <&sysc 4>;
 
 			interrupt-parent = <&intc>;
 			interrupts = <1>;
@@ -61,7 +61,7 @@
 			compatible = "ralink,rt2880-wdt";
 			reg = <0x120 0x10>;
 
-			clocks = <&sysc 4>;
+			clocks = <&sysc 5>;
 
 			resets = <&sysc 8>;
 			reset-names = "wdt";
@@ -93,7 +93,7 @@
 			compatible = "ralink,rt3883-uart", "ralink,rt2880-uart", "ns16550a";
 			reg = <0x500 0x100>;
 
-			clocks = <&sysc 5>;
+			clocks = <&sysc 6>;
 
 			resets = <&sysc 12>;
 
@@ -170,7 +170,7 @@
 			compatible = "ralink,rt2880-i2c";
 			reg = <0x900 0x100>;
 
-			clocks = <&sysc 6>;
+			clocks = <&sysc 7>;
 
 			resets = <&sysc 16>;
 			reset-names = "i2c";
@@ -188,7 +188,7 @@
 			compatible = "ralink,rt3883-i2s";
 			reg = <0xa00 0x100>;
 
-			clocks = <&sysc 7>;
+			clocks = <&sysc 8>;
 
 			resets = <&sysc 17>;
 			reset-names = "i2s";
@@ -212,7 +212,7 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 
-			clocks = <&sysc 8>;
+			clocks = <&sysc 9>;
 
 			resets = <&sysc 18>;
 			reset-names = "spi";
@@ -229,7 +229,7 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 
-			clocks = <&sysc 9>;
+			clocks = <&sysc 10>;
 
 			resets = <&sysc 18>;
 			reset-names = "spi";
@@ -244,7 +244,7 @@
 			compatible = "ralink,rt3883-uart", "ralink,rt2880-uart", "ns16550a";
 			reg = <0xc00 0x100>;
 
-			clocks = <&sysc 10>;
+			clocks = <&sysc 11>;
 
 			resets = <&sysc 19>;
 
@@ -326,7 +326,7 @@
 		#size-cells = <0>;
 		reg = <0x10100000 0x10000>;
 
-		clocks = <&sysc 11>;
+		clocks = <&sysc 12>;
 
 		resets = <&sysc 21>;
 		reset-names = "fe";
@@ -446,7 +446,7 @@
 		compatible = "ralink,rt3883-wmac", "ralink,rt2880-wmac";
 		reg = <0x10180000 0x40000>;
 
-		clocks = <&sysc 12>;
+		clocks = <&sysc 13>;
 
 		interrupt-parent = <&cpuintc>;
 		interrupts = <6>;
diff --git a/target/linux/ramips/patches-6.6/100-clk-ralink-mtmips-fix-clock-plan-for-Ralink-SoC-RT3883.patch b/target/linux/ramips/patches-6.6/100-clk-ralink-mtmips-fix-clock-plan-for-Ralink-SoC-RT3883.patch
new file mode 100644
index 0000000000..a3d58b78f6
--- /dev/null
+++ b/target/linux/ramips/patches-6.6/100-clk-ralink-mtmips-fix-clock-plan-for-Ralink-SoC-RT3883.patch
@@ -0,0 +1,45 @@
+Subject: [PATCH] clk: ralink: mtmips: fix clock plan for Ralink SoC RT3883
+Date: Tue,  6 Aug 2024 16:29:02 +0200
+Message-Id: <20240806142902.224164-1-sergio.paracuellos@gmail.com>
+
+Clock plan for Ralink SoC RT3883 needs an extra 'periph' clock to properly
+set some peripherals that has this clock as their parent. When this driver
+was mainlined we could not find any active users of this SoC so we cannot
+perform any real tests for it. Now, one user of a Belkin f9k1109 version 1
+device which uses this SoC appear and reported some issues in openWRT:
+- https://github.com/openwrt/openwrt/issues/16054
+The peripherals that are wrong are 'uart', 'i2c', 'i2s' and 'uartlite' which
+has a not defined 'periph' clock as parent. Hence, introduce it to have a
+properly working clock plan for this SoC.
+
+Fixes: 6f3b15586eef ("clk: ralink: add clock and reset driver for MTMIPS SoCs")
+Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
+---
+ drivers/clk/ralink/clk-mtmips.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+--- a/drivers/clk/ralink/clk-mtmips.c
++++ b/drivers/clk/ralink/clk-mtmips.c
+@@ -267,6 +267,11 @@ static struct mtmips_clk_fixed rt305x_fi
+ 	CLK_FIXED("xtal", NULL, 40000000)
+ };
+ 
++static struct mtmips_clk_fixed rt3383_fixed_clocks[] = {
++	CLK_FIXED("xtal", NULL, 40000000),
++	CLK_FIXED("periph", "xtal", 40000000)
++};
++
+ static struct mtmips_clk_fixed rt3352_fixed_clocks[] = {
+ 	CLK_FIXED("periph", "xtal", 40000000)
+ };
+@@ -779,8 +784,8 @@ static const struct mtmips_clk_data rt33
+ static const struct mtmips_clk_data rt3883_clk_data = {
+ 	.clk_base = rt3883_clks_base,
+ 	.num_clk_base = ARRAY_SIZE(rt3883_clks_base),
+-	.clk_fixed = rt305x_fixed_clocks,
+-	.num_clk_fixed = ARRAY_SIZE(rt305x_fixed_clocks),
++	.clk_fixed = rt3383_fixed_clocks,
++	.num_clk_fixed = ARRAY_SIZE(rt3383_fixed_clocks),
+ 	.clk_factor = NULL,
+ 	.num_clk_factor = 0,
+ 	.clk_periph = rt5350_pherip_clks,