diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2014-07-17 16:28:37 +0200 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2014-10-23 11:10:58 +0200 |
| commit | af7c111153cbe14f763bea89b7db60cac710bcbe (patch) | |
| tree | 5157fac022194c543c4f222033f66ee64713d222 /board | |
| parent | b16eb3e299d15577c18531223ff91ae225d21b4b (diff) | |
vf610: enable external 32KHz oscillator
Enable the SCSC (Slow Clock Source Controller) and select the
external 32KHz oscillator. This improves accuracy of the RTC.
Diffstat (limited to 'board')
| -rw-r--r-- | board/freescale/vf610twr/vf610twr.c | 13 | ||||
| -rw-r--r-- | board/toradex/colibri_vf/colibri_vf.c | 20 |
2 files changed, 27 insertions, 6 deletions
diff --git a/board/freescale/vf610twr/vf610twr.c b/board/freescale/vf610twr/vf610twr.c index 6b03495feb..085c2ee790 100644 --- a/board/freescale/vf610twr/vf610twr.c +++ b/board/freescale/vf610twr/vf610twr.c @@ -175,7 +175,7 @@ static void clock_init(void) CCM_CCGR2_PORTD_CTRL_MASK | CCM_CCGR2_PORTE_CTRL_MASK | CCM_CCGR2_QSPI0_CTRL_MASK); clrsetbits_le32(&ccm->ccgr3, CCM_REG_CTRL_MASK, - CCM_CCGR3_ANADIG_CTRL_MASK); + CCM_CCGR3_ANADIG_CTRL_MASK | CCM_CCGR3_SCSC_CTRL_MASK); clrsetbits_le32(&ccm->ccgr4, CCM_REG_CTRL_MASK, CCM_CCGR4_WKUP_CTRL_MASK | CCM_CCGR4_CCM_CTRL_MASK | CCM_CCGR4_GPC_CTRL_MASK | CCM_CCGR4_I2C0_CTRL_MASK); @@ -256,9 +256,20 @@ int board_early_init_f(void) int board_init(void) { + struct scsc_reg *scsc = (struct scsc_reg *)SCSC_BASE_ADDR; + /* address of boot parameters */ gd->bd->bi_boot_params = PHYS_SDRAM + 0x100; + /* + * Enable external 32K Oscillator + * + * The internal clock experiences significant drift + * so we must use the external oscillator in order + * to maintain correct time in the hwclock + */ + setbits_le32(&scsc->sosc_ctr, SCSC_SOSC_CTR_SOSC_EN); + return 0; } diff --git a/board/toradex/colibri_vf/colibri_vf.c b/board/toradex/colibri_vf/colibri_vf.c index 17b1eda9da..3be74e0d67 100644 --- a/board/toradex/colibri_vf/colibri_vf.c +++ b/board/toradex/colibri_vf/colibri_vf.c @@ -162,7 +162,7 @@ static void clock_init(void) CCM_CCGR2_PORTB_CTRL_MASK | CCM_CCGR2_PORTC_CTRL_MASK | CCM_CCGR2_PORTD_CTRL_MASK | CCM_CCGR2_PORTE_CTRL_MASK); clrsetbits_le32(&ccm->ccgr3, CCM_REG_CTRL_MASK, - CCM_CCGR3_ANADIG_CTRL_MASK); + CCM_CCGR3_ANADIG_CTRL_MASK | CCM_CCGR3_SCSC_CTRL_MASK); clrsetbits_le32(&ccm->ccgr4, CCM_REG_CTRL_MASK, CCM_CCGR4_WKUP_CTRL_MASK | CCM_CCGR4_CCM_CTRL_MASK | CCM_CCGR4_GPC_CTRL_MASK | CCM_CCGR4_I2C0_CTRL_MASK); @@ -274,13 +274,23 @@ int board_late_init(void) int board_init(void) { + struct scsc_reg *scsc = (struct scsc_reg *)SCSC_BASE_ADDR; + + if (!is_colibri_vf61()) + gd->bd->bi_arch_number = MACH_TYPE_COLIBRI_VF50; + else + gd->bd->bi_arch_number = MACH_TYPE_COLIBRI_VF61; /* address of boot parameters */ gd->bd->bi_boot_params = PHYS_SDRAM + 0x100; - if (is_colibri_vf61()) - gd->bd->bi_arch_number = MACH_TYPE_COLIBRI_VF61; - else - gd->bd->bi_arch_number = MACH_TYPE_COLIBRI_VF50; + /* + * Enable external 32K Oscillator + * + * The internal clock experiences significant drift + * so we must use the external oscillator in order + * to maintain correct time in the hwclock + */ + setbits_le32(&scsc->sosc_ctr, SCSC_SOSC_CTR_SOSC_EN); return 0; } |