summaryrefslogtreecommitdiff
path: root/arch/arm/cpu
diff options
context:
space:
mode:
authorMarek Vasut <marex@denx.de>2014-09-16 19:54:32 +0200
committerMarek Vasut <marex@denx.de>2014-10-06 17:46:49 +0200
commit036ba54f5b713f60c17c4a28e4ad4d59fa913db9 (patch)
tree1bcb035b90add59f032b9e6843e7a3a112d234b3 /arch/arm/cpu
parent44428ab6abbba58aa90b982d4d41b39cbcbec966 (diff)
downloadu-boot-imx-036ba54f5b713f60c17c4a28e4ad4d59fa913db9.zip
u-boot-imx-036ba54f5b713f60c17c4a28e4ad4d59fa913db9.tar.gz
u-boot-imx-036ba54f5b713f60c17c4a28e4ad4d59fa913db9.tar.bz2
arm: socfpga: clock: Sync with reference code
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> Acked-by: Pavel Machek <pavel@denx.de>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv7/socfpga/clock_manager.c42
1 files changed, 26 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)