diff options
| -rw-r--r-- | arch/arm/mach-omap2/clock34xx.c | 10 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/sram34xx.S | 13 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/mach/sram.h | 6 | ||||
| -rw-r--r-- | arch/arm/plat-omap/sram.c | 7 |
4 files changed, 24 insertions, 12 deletions
diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c index 0a14dca31e30..811360af60dc 100644 --- a/arch/arm/mach-omap2/clock34xx.c +++ b/arch/arm/mach-omap2/clock34xx.c @@ -281,6 +281,8 @@ static struct omap_clk omap34xx_clks[] = { #define MAX_DPLL_WAIT_TRIES 1000000 +#define MIN_SDRC_DLL_LOCK_FREQ 83000000 + /** * omap3_dpll_recalc - recalculate DPLL rate * @clk: DPLL struct clk @@ -703,6 +705,7 @@ static int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate) static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate) { u32 new_div = 0; + u32 unlock_dll = 0; unsigned long validrate, sdrcrate; struct omap_sdrc_params *sp; @@ -729,6 +732,11 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate) if (!sp) return -EINVAL; + if (sdrcrate < MIN_SDRC_DLL_LOCK_FREQ) { + pr_debug("clock: will unlock SDRC DLL\n"); + unlock_dll = 1; + } + pr_info("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate, validrate); pr_info("clock: SDRC timing params used: %08x %08x %08x\n", @@ -739,7 +747,7 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate) /* REVISIT: Add SDRC_MR changing to this code also */ omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla, - sp->actim_ctrlb, new_div); + sp->actim_ctrlb, new_div, unlock_dll); return 0; } diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S index 35131e5bc7d1..c080c82521e1 100644 --- a/arch/arm/mach-omap2/sram34xx.S +++ b/arch/arm/mach-omap2/sram34xx.S @@ -40,22 +40,23 @@ /* * Change frequency of core dpll * r0 = sdrc_rfr_ctrl r1 = sdrc_actim_ctrla r2 = sdrc_actim_ctrlb r3 = M2 + * r4 = Unlock SDRC DLL? (1 = yes, 0 = no) -- only unlock DLL for + * SDRC rates < 83MHz */ ENTRY(omap3_sram_configure_core_dpll) stmfd sp!, {r1-r12, lr} @ store regs to stack + ldr r4, [sp, #52] @ pull extra args off the stack dsb @ flush buffered writes to interconnect cmp r3, #0x2 blne configure_sdrc - cmp r3, #0x2 + cmp r4, #0x1 + bleq unlock_dll blne lock_dll - cmp r3, #0x1 - blne unlock_dll bl sdram_in_selfrefresh @ put the SDRAM in self refresh bl configure_core_dpll bl enable_sdrc - cmp r3, #0x1 - blne wait_dll_unlock - cmp r3, #0x2 + cmp r4, #0x1 + bleq wait_dll_unlock blne wait_dll_lock cmp r3, #0x1 blne configure_sdrc diff --git a/arch/arm/plat-omap/include/mach/sram.h b/arch/arm/plat-omap/include/mach/sram.h index ab35d622dcf5..dca7c16ae903 100644 --- a/arch/arm/plat-omap/include/mach/sram.h +++ b/arch/arm/plat-omap/include/mach/sram.h @@ -23,7 +23,8 @@ extern u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass); extern u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla, - u32 sdrc_actim_ctrlb, u32 m2); + u32 sdrc_actim_ctrlb, u32 m2, + u32 unlock_dll); /* Do not use these */ extern void omap1_sram_reprogram_clock(u32 ckctl, u32 dpllctl); @@ -60,7 +61,8 @@ extern unsigned long omap243x_sram_reprogram_sdrc_sz; extern u32 omap3_sram_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla, - u32 sdrc_actim_ctrlb, u32 m2); + u32 sdrc_actim_ctrlb, u32 m2, + u32 unlock_dll); extern unsigned long omap3_sram_configure_core_dpll_sz; #endif diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c index 38353386e91e..876f5a7ecafd 100644 --- a/arch/arm/plat-omap/sram.c +++ b/arch/arm/plat-omap/sram.c @@ -365,16 +365,17 @@ static inline int omap243x_sram_init(void) static u32 (*_omap3_sram_configure_core_dpll)(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla, u32 sdrc_actim_ctrlb, - u32 m2); + u32 m2, u32 unlock_dll); u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla, - u32 sdrc_actim_ctrlb, u32 m2) + u32 sdrc_actim_ctrlb, u32 m2, u32 unlock_dll) { if (!_omap3_sram_configure_core_dpll) omap_sram_error(); return _omap3_sram_configure_core_dpll(sdrc_rfr_ctrl, sdrc_actim_ctrla, - sdrc_actim_ctrlb, m2); + sdrc_actim_ctrlb, m2, + unlock_dll); } /* REVISIT: Should this be same as omap34xx_sram_init() after off-idle? */ |