hw: aspeed_scu: Introduce clkin_25Mhz attribute

AST2600 clkin is always 25MHz, introduce clkin_25Mhz attribute
for aspeed_scu_get_clkin() to return the correct clkin for ast2600.

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220315075753.8591-3-steven_lee@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

hw/misc/aspeed_scu.c

@@ -371,7 +371,8 @@ static const MemoryRegionOps aspeed_ast2500_scu_ops = {
 
 static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s)
 {
-    if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN) {
+    if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN ||
+        ASPEED_SCU_GET_CLASS(s)->clkin_25Mhz) {
         return 25000000;
     } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) {
         return 48000000;
@@ -562,6 +563,7 @@ static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data)
     asc->get_apb = aspeed_2400_scu_get_apb_freq;
     asc->apb_divider = 2;
     asc->nr_regs = ASPEED_SCU_NR_REGS;
+    asc->clkin_25Mhz = false;
     asc->ops = &aspeed_ast2400_scu_ops;
 }
 
@@ -583,6 +585,7 @@ static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data)
     asc->get_apb = aspeed_2400_scu_get_apb_freq;
     asc->apb_divider = 4;
     asc->nr_regs = ASPEED_SCU_NR_REGS;
+    asc->clkin_25Mhz = false;
     asc->ops = &aspeed_ast2500_scu_ops;
 }
 
@@ -756,6 +759,7 @@ static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data)
     asc->get_apb = aspeed_2600_scu_get_apb_freq;
     asc->apb_divider = 4;
     asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS;
+    asc->clkin_25Mhz = true;
     asc->ops = &aspeed_ast2600_scu_ops;
 }
 

include/hw/misc/aspeed_scu.h

@@ -59,6 +59,7 @@ struct AspeedSCUClass {
     uint32_t (*get_apb)(AspeedSCUState *s);
     uint32_t apb_divider;
     uint32_t nr_regs;
+    bool clkin_25Mhz;
     const MemoryRegionOps *ops;
 };