cpuidle: psci: Drop superfluous wrappers psci_dt_attach|detach_cpu()

To simplify the code, let's drop psci_dt_attach|detach_cpu() and use the
common dt_idle_attach|detach_cpu() directly instead.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20240228151139.2650258-1-ulf.hansson@linaro.org

drivers/cpuidle/cpuidle-psci-domain.c

@@ -20,6 +20,7 @@
 #include <linux/string.h>
 
 #include "cpuidle-psci.h"
+#include "dt_idle_genpd.h"
 
 struct psci_pd_provider {
 	struct list_head link;

drivers/cpuidle/cpuidle-psci.c

@@ -28,6 +28,7 @@
 
 #include "cpuidle-psci.h"
 #include "dt_idle_states.h"
+#include "dt_idle_genpd.h"
 
 struct psci_cpuidle_data {
 	u32 *psci_states;
@@ -224,7 +225,7 @@ static int psci_dt_cpu_init_topology(struct cpuidle_driver *drv,
 	if (IS_ENABLED(CONFIG_PREEMPT_RT))
 		return 0;
 
-	data->dev = psci_dt_attach_cpu(cpu);
+	data->dev = dt_idle_attach_cpu(cpu, "psci");
 	if (IS_ERR_OR_NULL(data->dev))
 		return PTR_ERR_OR_ZERO(data->dev);
 
@@ -311,7 +312,7 @@ static void psci_cpu_deinit_idle(int cpu)
 {
 	struct psci_cpuidle_data *data = per_cpu_ptr(&psci_cpuidle_data, cpu);
 
-	psci_dt_detach_cpu(data->dev);
+	dt_idle_detach_cpu(data->dev);
 	psci_cpuidle_use_cpuhp = false;
 }
 

drivers/cpuidle/cpuidle-psci.h

@@ -3,29 +3,9 @@
 #ifndef __CPUIDLE_PSCI_H
 #define __CPUIDLE_PSCI_H
 
-struct device;
 struct device_node;
 
 void psci_set_domain_state(u32 state);
 int psci_dt_parse_state_node(struct device_node *np, u32 *state);
 
-#ifdef CONFIG_ARM_PSCI_CPUIDLE_DOMAIN
-
-#include "dt_idle_genpd.h"
-
-static inline struct device *psci_dt_attach_cpu(int cpu)
-{
-	return dt_idle_attach_cpu(cpu, "psci");
-}
-
-static inline void psci_dt_detach_cpu(struct device *dev)
-{
-	dt_idle_detach_cpu(dev);
-}
-
-#else
-static inline struct device *psci_dt_attach_cpu(int cpu) { return NULL; }
-static inline void psci_dt_detach_cpu(struct device *dev) { }
-#endif
-
 #endif /* __CPUIDLE_PSCI_H */