clk: samsung: exynos850: Add APM-to-AP mailbox clock

Add APM mailbox clock for communicating between APM and main application
CPUs in CMU_APM unit. This clock is needed to access this mailbox
registers. This mailbox is used for ACPM communication between kernel
and APM co-processor.

Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
Link: https://patch.msgid.link/20260320-exynos850-ap2apm-mailbox-v1-2-983eb3f296fc@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Author: laklimov

drivers/clk/samsung/clk-exynos850.c

@@ -19,7 +19,7 @@
 
 /* NOTE: Must be equal to the last clock ID increased by one */
 #define CLKS_NR_TOP			(CLK_DOUT_CPUCL1_SWITCH + 1)
-#define CLKS_NR_APM			(CLK_GOUT_SYSREG_APM_PCLK + 1)
+#define CLKS_NR_APM			(CLK_GOUT_MAILBOX_APM_AP_PCLK + 1)
 #define CLKS_NR_AUD			(CLK_GOUT_AUD_CMU_AUD_PCLK + 1)
 #define CLKS_NR_CMGP			(CLK_GOUT_SYSREG_CMGP_PCLK + 1)
 #define CLKS_NR_CPUCL0			(CLK_CLUSTER0_SCLK + 1)
@@ -604,6 +604,7 @@ CLK_OF_DECLARE(exynos850_cmu_top, "samsung,exynos850-cmu-top",
 #define CLK_CON_GAT_GOUT_APM_APBIF_TOP_RTC_PCLK		0x2028
 #define CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_PCLK	0x2034
 #define CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_SCLK	0x2038
+#define CLK_CON_GAT_GOUT_APM_MAILBOX_APM_AP_PCLK	0x2060
 #define CLK_CON_GAT_GOUT_APM_SPEEDY_APM_PCLK		0x20bc
 #define CLK_CON_GAT_GOUT_APM_SYSREG_APM_PCLK		0x20c0
 
@@ -628,6 +629,7 @@ static const unsigned long apm_clk_regs[] __initconst = {
 	CLK_CON_GAT_GOUT_APM_I3C_APM_PMIC_I_SCLK,
 	CLK_CON_GAT_GOUT_APM_SPEEDY_APM_PCLK,
 	CLK_CON_GAT_GOUT_APM_SYSREG_APM_PCLK,
+	CLK_CON_GAT_GOUT_APM_MAILBOX_APM_AP_PCLK,
 };
 
 /* List of parent clocks for Muxes in CMU_APM */
@@ -698,6 +700,9 @@ static const struct samsung_gate_clock apm_gate_clks[] __initconst = {
 	     CLK_CON_GAT_GOUT_APM_APBIF_PMU_ALIVE_PCLK, 21, CLK_IS_CRITICAL, 0),
 	GATE(CLK_GOUT_SYSREG_APM_PCLK, "gout_sysreg_apm_pclk", "dout_apm_bus",
 	     CLK_CON_GAT_GOUT_APM_SYSREG_APM_PCLK, 21, 0, 0),
+	GATE(CLK_GOUT_MAILBOX_APM_AP_PCLK, "gout_mailbox_apm_ap_pclk",
+	     "dout_apm_func",
+	     CLK_CON_GAT_GOUT_APM_MAILBOX_APM_AP_PCLK, 21, 0, 0),
 };
 
 static const struct samsung_cmu_info apm_cmu_info __initconst = {