Add "pwm" service

nx/include/switch/services/pwm.h

@@ -0,0 +1,38 @@
+/**
+ * @file pwm.h
+ * @author MasaGratoR
+ * @copyright libnx Authors
+ */
+
+#pragma once
+
+#include "../types.h"
+#include "../sf/service.h"
+
+typedef struct {
+    Service s;
+} PwmChannelSession;
+
+typedef enum {
+    PwmChannelDeviceCode_CpuFan       = 0x3D000001,
+    PwmChannelDeviceCode_LcdBacklight = 0x3400003D,
+    PwmChannelDeviceCode_Led          = 0x35000065
+} PwmChannelDeviceCode;
+
+/// Initialize pwm.
+Result pwmInitialize(void);
+
+/// Exit pwm.
+void pwmExit(void);
+
+/// Gets the Service for pwm.
+Service* pwmGetServiceSession(void);
+
+/// Takes a PwmChannelDeviceCode and returns a PwmChannelSession. Only available on [6.0.0+].
+Result pwmOpenSession2(PwmChannelSession *out, PwmChannelDeviceCode device_code);
+
+/// Closes a PwmChannelSession.
+void pwmChannelSessionClose(PwmChannelSession *c);
+
+/// Takes a PwmChannelSession, returns an output double. Only available on [6.0.0+].
+Result pwmChannelSessionGetDutyCycle(PwmChannelSession *c, double* out);

nx/source/services/pwm.c

@@ -0,0 +1,46 @@
+#define NX_SERVICE_ASSUME_NON_DOMAIN
+#include "service_guard.h"
+#include "services/pwm.h"
+#include "runtime/hosversion.h"
+
+static Service g_pwmSrv;
+
+NX_GENERATE_SERVICE_GUARD(pwm);
+
+Result _pwmInitialize(void) {
+    return smGetService(&g_pwmSrv, "pwm");
+}
+
+void _pwmCleanup(void) {
+    serviceClose(&g_pwmSrv);
+}
+
+Service* pwmGetServiceSession(void) {
+    return &g_pwmSrv;
+}
+
+Result pwmOpenSession2(PwmChannelSession *out, PwmChannelDeviceCode device_code) {
+    if (hosversionBefore(6,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    u32 tmp = device_code;
+
+    return serviceDispatchIn(&g_pwmSrv, 2, tmp,
+        .out_num_objects = 1,
+        .out_objects = &out->s,
+    );
+}
+
+void pwmChannelSessionClose(PwmChannelSession *c) {
+    serviceClose(&c->s);
+}
+
+Result pwmChannelSessionGetDutyCycle(PwmChannelSession *c, double* out) {
+    if (hosversionBefore(6,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    if (!serviceIsActive(&c->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    return serviceDispatchOut(&c->s, 7, *out);
+}