diff options
Diffstat (limited to 'board/ti/common/rtc.c')
| -rw-r--r-- | board/ti/common/rtc.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/board/ti/common/rtc.c b/board/ti/common/rtc.c new file mode 100644 index 0000000000..e117a92776 --- /dev/null +++ b/board/ti/common/rtc.c @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * RTC setup for TI Platforms + * + * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/ + */ +#include <asm/arch/hardware.h> +#include <asm/io.h> +#include <log.h> + +#define WKUP_CTRLMMR_DBOUNCE_CFG1 0x04504084 +#define WKUP_CTRLMMR_DBOUNCE_CFG2 0x04504088 +#define WKUP_CTRLMMR_DBOUNCE_CFG3 0x0450408c +#define WKUP_CTRLMMR_DBOUNCE_CFG4 0x04504090 +#define WKUP_CTRLMMR_DBOUNCE_CFG5 0x04504094 +#define WKUP_CTRLMMR_DBOUNCE_CFG6 0x04504098 + +void board_rtc_init(void) +{ + u32 val; + + /* We have 32k crystal, so lets enable it */ + val = readl(MCU_CTRL_LFXOSC_CTRL); + val &= ~(MCU_CTRL_LFXOSC_32K_DISABLE_VAL); + writel(val, MCU_CTRL_LFXOSC_CTRL); + + /* Add any TRIM needed for the crystal here.. */ + /* Make sure to mux up to take the SoC 32k from the crystal */ + writel(MCU_CTRL_DEVICE_CLKOUT_LFOSC_SELECT_VAL, + MCU_CTRL_DEVICE_CLKOUT_32K_CTRL); + + /* Setup debounce conf registers - arbitrary values. + * Times are approx + */ + /* 1.9ms debounce @ 32k */ + writel(WKUP_CTRLMMR_DBOUNCE_CFG1, 0x1); + /* 5ms debounce @ 32k */ + writel(WKUP_CTRLMMR_DBOUNCE_CFG2, 0x5); + /* 20ms debounce @ 32k */ + writel(WKUP_CTRLMMR_DBOUNCE_CFG3, 0x14); + /* 46ms debounce @ 32k */ + writel(WKUP_CTRLMMR_DBOUNCE_CFG4, 0x18); + /* 100ms debounce @ 32k */ + writel(WKUP_CTRLMMR_DBOUNCE_CFG5, 0x1c); + /* 156ms debounce @ 32k */ + writel(WKUP_CTRLMMR_DBOUNCE_CFG6, 0x1f); +} |