Merge pull request #368 from FrankBoesing/patch-2

add SNVS definitions for RTC

teensy4/imxrt.h

 #define SNVS_LPLR			(IMXRT_SNVS.offset034)
 #define SNVS_LPCR			(IMXRT_SNVS.offset038)
 #define SNVS_LPSR			(IMXRT_SNVS.offset04C)
+#define SNVS_LPSRTCMR			(IMXRT_SNVS.offset050)
+#define SNVS_LPSRTCLR			(IMXRT_SNVS.offset054)
+#define SNVS_LPTAR			(IMXRT_SNVS.offset058)
 #define SNVS_LPSMCMR			(IMXRT_SNVS.offset05C)
 #define SNVS_LPSMCLR			(IMXRT_SNVS.offset060)
 #define SNVS_LPGPR			(IMXRT_SNVS.offset068)
 #define IMXRT_SNVS_b		(*(IMXRT_REGISTER32_t *)0x400D4800)
 #define SNVS_HPVIDR1			(IMXRT_SNVS_b.offset3F8)
 #define SNVS_HPVIDR2			(IMXRT_SNVS_b.offset3FC)
+#define SNVS_DEFAULT_PGD_VALUE		(0x41736166U)
+#define SNVS_LPSR_PGD_MASK              (0x8)
+#define SNVS_LPCR_SRTC_ENV_MASK         (0x1)
+#define SNVS_LPCR_SRTC_ENV(x)           (((uint32_t)(((uint32_t)(x)) << 0)) & 0x1)
+#define SNVS_LPCR_LPTA_EN_MASK          (0x2)
+#define SNVS_LPCR_LPTA_EN(x)            (((uint32_t)(((uint32_t)(x)) << 1)) & 0x2)
+#define SNVS_LPCR_MC_ENV_MASK           (0x4)
+#define SNVS_LPCR_MC_ENV(x)             (((uint32_t)(((uint32_t)(x)) << 2)) & 0x4)
+#define SNVS_LPCR_LPWUI_EN_MASK         (0x8)
+#define SNVS_LPCR_LPWUI_EN(x)           (((uint32_t)(((uint32_t)(x)) << 3)) & 0x8)
+#define SNVS_LPCR_SRTC_INV_EN_MASK      (0x10)
+#define SNVS_LPCR_SRTC_INV_EN(x)        (((uint32_t)(((uint32_t)(x)) << 4)) & 0x10)
+#define SNVS_LPCR_DP_EN_MASK            (0x20)
+#define SNVS_LPCR_DP_EN(x)              (((uint32_t)(((uint32_t)(x)) << 5)) & 0x20)
+#define SNVS_LPCR_TOP_MASK              (0x40)
+#define SNVS_LPCR_TOP(x)                (((uint32_t)(((uint32_t)(x)) << 6)) & 0x40)
+#define SNVS_LPCR_PWR_GLITCH_EN_MASK    (0x80)
+#define SNVS_LPCR_PWR_GLITCH_EN(x)      (((uint32_t)(((uint32_t)(x)) << 7)) & 0x80)
+#define SNVS_LPCR_LPCALB_EN_MASK        (0x100)
+#define SNVS_LPCR_LPCALB_EN(x)          (((uint32_t)(((uint32_t)(x)) << 8)) & 0x100)
+#define SNVS_LPCR_LPCALB_VAL_MASK       (0x7C00)
+#define SNVS_LPCR_LPCALB_VAL(x)         (((uint32_t)(((uint32_t)(x)) << 10)) & 0x7C00)
+#define SNVS_LPCR_BTN_PRESS_TIME_MASK   (0x30000)
+#define SNVS_LPCR_BTN_PRESS_TIME(x)     (((uint32_t)(((uint32_t)(x)) << 16)) & 0x30000)
+#define SNVS_LPCR_DEBOUNCE_MASK         (0xC0000)
+#define SNVS_LPCR_DEBOUNCE(x)           (((uint32_t)(((uint32_t)(x)) << 18)) & 0xC0000)
+#define SNVS_LPCR_ON_TIME_MASK          (0x300000)
+#define SNVS_LPCR_ON_TIME(x)            (((uint32_t)(((uint32_t)(x)) << 20)) & 0x300000)
+#define SNVS_LPCR_PK_EN_MASK            (0x400000)
+#define SNVS_LPCR_PK_EN(x)              (((uint32_t)(((uint32_t)(x)) << 22)) & 0x400000)
+#define SNVS_LPCR_PK_OVERRIDE_MASK      (0x800000)
+#define SNVS_LPCR_PK_OVERRIDE(x)        (((uint32_t)(((uint32_t)(x)) << 23)) & 0x800000)
+#define SNVS_LPCR_GPR_Z_DIS_MASK        (0x1000000)
+#define SNVS_LPCR_GPR_Z_DIS(x)          (((uint32_t)(((uint32_t)(x)) << 24)) & 0x1000000)
+#define SNVS_LPSR_LPTA                  (0x1)
 
 // 51.5: page 2938
 #define IMXRT_SPDIF		(*(IMXRT_REGISTER32_t *)0x40380000)