Add the missing pieces from the reference clock code from Altera. This puts the code on par with the Altera U-Boot fork for all but the SDRAM self-refresh bits, which are not part of this patch.
Signed-off-by: Marek Vasut marex@denx.de Cc: Chin Liang See clsee@altera.com Cc: Dinh Nguyen dinguyen@altera.com Cc: Albert Aribaud albert.u.boot@aribaud.net Cc: Tom Rini trini@ti.com Cc: Wolfgang Denk wd@denx.de Cc: Pavel Machek pavel@denx.de --- arch/arm/cpu/armv7/socfpga/clock_manager.c | 42 ++++++++++++++--------- arch/arm/include/asm/arch-socfpga/clock_manager.h | 3 ++ 2 files changed, 29 insertions(+), 16 deletions(-)
diff --git a/arch/arm/cpu/armv7/socfpga/clock_manager.c b/arch/arm/cpu/armv7/socfpga/clock_manager.c index 1cf0d77..d869f47 100644 --- a/arch/arm/cpu/armv7/socfpga/clock_manager.c +++ b/arch/arm/cpu/armv7/socfpga/clock_manager.c @@ -16,9 +16,16 @@ static const struct socfpga_clock_manager *clock_manager_base = static void cm_wait_for_lock(uint32_t mask) { register uint32_t inter_val; + uint32_t retry = 0; do { inter_val = readl(&clock_manager_base->inter) & mask; - } while (inter_val != mask); + if (inter_val == mask) + retry++; + else + retry = 0; + if (retry >= 10) + break; + } while (1); }
/* function to poll in the fsm busy bit */ @@ -114,15 +121,15 @@ void cm_basic_init(const cm_config_t *cfg) cm_write_bypass(CLKMGR_BYPASS_PERPLL | CLKMGR_BYPASS_SDRPLL | CLKMGR_BYPASS_MAINPLL);
- /* - * Put all plls VCO registers back to reset value. - * Some code might have messed with them. - */ - writel(CLKMGR_MAINPLLGRP_VCO_RESET_VALUE, + /* Put all plls VCO registers back to reset value. */ + writel(CLKMGR_MAINPLLGRP_VCO_RESET_VALUE & + ~CLKMGR_MAINPLLGRP_VCO_REGEXTSEL_MASK, &clock_manager_base->main_pll.vco); - writel(CLKMGR_PERPLLGRP_VCO_RESET_VALUE, + writel(CLKMGR_PERPLLGRP_VCO_RESET_VALUE & + ~CLKMGR_PERPLLGRP_VCO_REGEXTSEL_MASK, &clock_manager_base->per_pll.vco); - writel(CLKMGR_SDRPLLGRP_VCO_RESET_VALUE, + writel(CLKMGR_SDRPLLGRP_VCO_RESET_VALUE & + ~CLKMGR_SDRPLLGRP_VCO_REGEXTSEL_MASK, &clock_manager_base->sdr_pll.vco);
/* @@ -147,14 +154,9 @@ void cm_basic_init(const cm_config_t *cfg) * We made sure bgpwr down was assert for 5 us. Now deassert BG PWR DN * with numerator and denominator. */ - writel(cfg->main_vco_base | CLKMGR_MAINPLLGRP_VCO_REGEXTSEL_MASK, - &clock_manager_base->main_pll.vco); - - writel(cfg->peri_vco_base | CLKMGR_PERPLLGRP_VCO_REGEXTSEL_MASK, - &clock_manager_base->per_pll.vco); - - writel(cfg->sdram_vco_base | CLKMGR_SDRPLLGRP_VCO_REGEXTSEL_MASK, - &clock_manager_base->sdr_pll.vco); + writel(cfg->main_vco_base, &clock_manager_base->main_pll.vco); + writel(cfg->peri_vco_base, &clock_manager_base->per_pll.vco); + writel(cfg->sdram_vco_base, &clock_manager_base->sdr_pll.vco);
/* * Time starts here @@ -189,6 +191,9 @@ void cm_basic_init(const cm_config_t *cfg) writel(cfg->perqspiclk, &clock_manager_base->per_pll.perqspiclk);
/* Peri pernandsdmmcclk */ + writel(cfg->mainnandsdmmcclk, + &clock_manager_base->main_pll.mainnandsdmmcclk); + writel(cfg->pernandsdmmcclk, &clock_manager_base->per_pll.pernandsdmmcclk);
@@ -318,6 +323,11 @@ void cm_basic_init(const cm_config_t *cfg) writel(~0, &clock_manager_base->main_pll.en); writel(~0, &clock_manager_base->per_pll.en); writel(~0, &clock_manager_base->sdr_pll.en); + + /* Clear the loss of lock bits (write 1 to clear) */ + writel(CLKMGR_INTER_SDRPLLLOST_MASK | CLKMGR_INTER_PERPLLLOST_MASK | + CLKMGR_INTER_MAINPLLLOST_MASK, + &clock_manager_base->inter); }
static unsigned int cm_get_main_vco_clk_hz(void) diff --git a/arch/arm/include/asm/arch-socfpga/clock_manager.h b/arch/arm/include/asm/arch-socfpga/clock_manager.h index bc91662..fa49f6a 100644 --- a/arch/arm/include/asm/arch-socfpga/clock_manager.h +++ b/arch/arm/include/asm/arch-socfpga/clock_manager.h @@ -135,6 +135,9 @@ struct socfpga_clock_manager { #define CLKMGR_INTER_SDRPLLLOCKED_MASK 0x00000100 #define CLKMGR_INTER_PERPLLLOCKED_MASK 0x00000080 #define CLKMGR_INTER_MAINPLLLOCKED_MASK 0x00000040 +#define CLKMGR_INTER_PERPLLLOST_MASK 0x00000010 +#define CLKMGR_INTER_SDRPLLLOST_MASK 0x00000020 +#define CLKMGR_INTER_MAINPLLLOST_MASK 0x00000008
#define CLKMGR_STAT_BUSY (1 << 0)