dt-bindings: clock: exynos850: Add CMU_CPUCLK0 and CMU_CPUCL1

Document CPU clock management unit compatibles and add corresponding
clock indices. Exynos850 has two CPU clusters (CL0 and CL1), each
containing 4 Cortex-A55 cores. CPU PLLs are generating main CPU clocks
for each cluster, and there are alternate ("switch") clocks that can be
used temporarily while re-configuring the PLL for the new rate. ACLK,
ATCLK, PCLKDBG and PERIPHCLK clocks are driving corresponding buses.
CLK_CLUSTERx_SCLK are actual leaf CPU clocks and should be used to
change CPU rates. Also some CoreSight clocks can be derived from
DBG_USER (debug clock).

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20240224202053.25313-2-semen.protsenko@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml

@@ -36,6 +36,8 @@ properties:
       - samsung,exynos850-cmu-aud
       - samsung,exynos850-cmu-cmgp
       - samsung,exynos850-cmu-core
+      - samsung,exynos850-cmu-cpucl0
+      - samsung,exynos850-cmu-cpucl1
       - samsung,exynos850-cmu-dpu
       - samsung,exynos850-cmu-g3d
       - samsung,exynos850-cmu-hsi
@@ -152,6 +154,46 @@ allOf:
             - const: dout_core_mmc_embd
             - const: dout_core_sss
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-cpucl0
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+            - description: CPUCL0 switch clock (from CMU_TOP)
+            - description: CPUCL0 debug clock (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: dout_cpucl0_switch
+            - const: dout_cpucl0_dbg
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-cmu-cpucl1
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (26 MHz)
+            - description: CPUCL1 switch clock (from CMU_TOP)
+            - description: CPUCL1 debug clock (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: dout_cpucl1_switch
+            - const: dout_cpucl1_dbg
+
   - if:
       properties:
         compatible:

include/dt-bindings/clock/exynos850.h

@@ -88,6 +88,18 @@
 #define CLK_MOUT_G3D_SWITCH		76
 #define CLK_GOUT_G3D_SWITCH		77
 #define CLK_DOUT_G3D_SWITCH		78
+#define CLK_MOUT_CPUCL0_DBG		79
+#define CLK_MOUT_CPUCL0_SWITCH		80
+#define CLK_GOUT_CPUCL0_DBG		81
+#define CLK_GOUT_CPUCL0_SWITCH		82
+#define CLK_DOUT_CPUCL0_DBG		83
+#define CLK_DOUT_CPUCL0_SWITCH		84
+#define CLK_MOUT_CPUCL1_DBG		85
+#define CLK_MOUT_CPUCL1_SWITCH		86
+#define CLK_GOUT_CPUCL1_DBG		87
+#define CLK_GOUT_CPUCL1_SWITCH		88
+#define CLK_DOUT_CPUCL1_DBG		89
+#define CLK_DOUT_CPUCL1_SWITCH		90
 
 /* CMU_APM */
 #define CLK_RCO_I3C_PMIC		1
@@ -195,6 +207,48 @@
 #define CLK_GOUT_CMGP_USI1_PCLK		14
 #define CLK_GOUT_SYSREG_CMGP_PCLK	15
 
+/* CMU_CPUCL0 */
+#define CLK_FOUT_CPUCL0_PLL		1
+#define CLK_MOUT_PLL_CPUCL0		2
+#define CLK_MOUT_CPUCL0_SWITCH_USER	3
+#define CLK_MOUT_CPUCL0_DBG_USER	4
+#define CLK_MOUT_CPUCL0_PLL		5
+#define CLK_DOUT_CPUCL0_CPU		6
+#define CLK_DOUT_CPUCL0_CMUREF		7
+#define CLK_DOUT_CPUCL0_PCLK		8
+#define CLK_DOUT_CLUSTER0_ACLK		9
+#define CLK_DOUT_CLUSTER0_ATCLK		10
+#define CLK_DOUT_CLUSTER0_PCLKDBG	11
+#define CLK_DOUT_CLUSTER0_PERIPHCLK	12
+#define CLK_GOUT_CLUSTER0_ATCLK		13
+#define CLK_GOUT_CLUSTER0_PCLK		14
+#define CLK_GOUT_CLUSTER0_PERIPHCLK	15
+#define CLK_GOUT_CLUSTER0_SCLK		16
+#define CLK_GOUT_CPUCL0_CMU_CPUCL0_PCLK	17
+#define CLK_GOUT_CLUSTER0_CPU		18
+#define CLK_CLUSTER0_SCLK		19
+
+/* CMU_CPUCL1 */
+#define CLK_FOUT_CPUCL1_PLL		1
+#define CLK_MOUT_PLL_CPUCL1		2
+#define CLK_MOUT_CPUCL1_SWITCH_USER	3
+#define CLK_MOUT_CPUCL1_DBG_USER	4
+#define CLK_MOUT_CPUCL1_PLL		5
+#define CLK_DOUT_CPUCL1_CPU		6
+#define CLK_DOUT_CPUCL1_CMUREF		7
+#define CLK_DOUT_CPUCL1_PCLK		8
+#define CLK_DOUT_CLUSTER1_ACLK		9
+#define CLK_DOUT_CLUSTER1_ATCLK		10
+#define CLK_DOUT_CLUSTER1_PCLKDBG	11
+#define CLK_DOUT_CLUSTER1_PERIPHCLK	12
+#define CLK_GOUT_CLUSTER1_ATCLK		13
+#define CLK_GOUT_CLUSTER1_PCLK		14
+#define CLK_GOUT_CLUSTER1_PERIPHCLK	15
+#define CLK_GOUT_CLUSTER1_SCLK		16
+#define CLK_GOUT_CPUCL1_CMU_CPUCL1_PCLK	17
+#define CLK_GOUT_CLUSTER1_CPU		18
+#define CLK_CLUSTER1_SCLK		19
+
 /* CMU_G3D */
 #define CLK_FOUT_G3D_PLL		1
 #define CLK_MOUT_G3D_PLL		2