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authorTero Kristo <tero.kristo@nokia.com>2009-06-19 19:08:29 -0600
committerpaul <paul@twilight.(none)>2009-06-19 19:09:32 -0600
commit3afec6332e1e7cf2d74e0bf08160a68f43a59073 (patch)
treeb0b6d4b12d54cb5079975a3a58583c98f892f708
parentdf14e4747aa58126a508ae26661c73d83127c831 (diff)
OMAP3: Add support for DPLL3 divisor values higher than 2
Previously only 1 and 2 was supported. This is needed for DVFS VDD2 control. Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
-rw-r--r--arch/arm/mach-omap2/clock34xx.c9
-rw-r--r--arch/arm/mach-omap2/sram34xx.S8
-rw-r--r--arch/arm/plat-omap/include/mach/sram.h6
-rw-r--r--arch/arm/plat-omap/sram.c6
4 files changed, 15 insertions, 14 deletions
diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
index cf41ab55fa9..045da923e75 100644
--- a/arch/arm/mach-omap2/clock34xx.c
+++ b/arch/arm/mach-omap2/clock34xx.c
@@ -739,9 +739,9 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
sdrcrate = sdrc_ick.rate;
if (rate > clk->rate)
- sdrcrate <<= ((rate / clk->rate) - 1);
+ sdrcrate <<= ((rate / clk->rate) >> 1);
else
- sdrcrate >>= ((clk->rate / rate) - 1);
+ sdrcrate >>= ((clk->rate / rate) >> 1);
sp = omap2_sdrc_get_params(sdrcrate);
if (!sp)
@@ -768,12 +768,9 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
pr_debug("clock: SDRC timing params used: %08x %08x %08x\n",
sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb);
- /* REVISIT: SRAM code doesn't support other M2 divisors yet */
- WARN_ON(new_div != 1 && new_div != 2);
-
omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla,
sp->actim_ctrlb, new_div, unlock_dll, c,
- sp->mr);
+ sp->mr, rate > clk->rate);
return 0;
}
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S
index 16eb4efa8b7..487fa8609cd 100644
--- a/arch/arm/mach-omap2/sram34xx.S
+++ b/arch/arm/mach-omap2/sram34xx.S
@@ -70,6 +70,7 @@
* r5 = number of MPU cycles to wait for SDRC to stabilize after
* reprogramming the SDRC when switching to a slower MPU speed
* r6 = new SDRC_MR_0 register value
+ * r7 = increasing SDRC rate? (1 = yes, 0 = no)
*
*/
ENTRY(omap3_sram_configure_core_dpll)
@@ -77,9 +78,10 @@ ENTRY(omap3_sram_configure_core_dpll)
ldr r4, [sp, #52] @ pull extra args off the stack
ldr r5, [sp, #56] @ load extra args from the stack
ldr r6, [sp, #60] @ load extra args from the stack
+ ldr r7, [sp, #64] @ load extra args from the stack
dsb @ flush buffered writes to interconnect
- cmp r3, #0x2 @ if increasing SDRC clk rate,
- blne configure_sdrc @ program the SDRC regs early (for RFR)
+ cmp r7, #1 @ if increasing SDRC clk rate,
+ bleq configure_sdrc @ program the SDRC regs early (for RFR)
cmp r4, #SDRC_UNLOCK_DLL @ set the intended DLL state
bleq unlock_dll
blne lock_dll
@@ -89,7 +91,7 @@ ENTRY(omap3_sram_configure_core_dpll)
cmp r4, #SDRC_UNLOCK_DLL @ wait for DLL status to change
bleq wait_dll_unlock
blne wait_dll_lock
- cmp r3, #0x1 @ if increasing SDRC clk rate,
+ cmp r7, #1 @ if increasing SDRC clk rate,
beq return_to_sdram @ return to SDRAM code, otherwise,
bl configure_sdrc @ reprogram SDRC regs now
mov r12, r5
diff --git a/arch/arm/plat-omap/include/mach/sram.h b/arch/arm/plat-omap/include/mach/sram.h
index 4f87056a367..4d53cc59d7a 100644
--- a/arch/arm/plat-omap/include/mach/sram.h
+++ b/arch/arm/plat-omap/include/mach/sram.h
@@ -24,7 +24,8 @@ 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 unlock_dll, u32 f, u32 sdrc_mr);
+ u32 unlock_dll, u32 f, u32 sdrc_mr,
+ u32 inc);
/* Do not use these */
extern void omap1_sram_reprogram_clock(u32 ckctl, u32 dpllctl);
@@ -62,7 +63,8 @@ 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 unlock_dll, u32 f, u32 sdrc_mr);
+ u32 unlock_dll, u32 f, u32 sdrc_mr,
+ u32 inc);
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 7dadf1a59fb..65006df3f1b 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -372,16 +372,16 @@ static u32 (*_omap3_sram_configure_core_dpll)(u32 sdrc_rfr_ctrl,
u32 sdrc_actim_ctrla,
u32 sdrc_actim_ctrlb,
u32 m2, u32 unlock_dll,
- u32 f, u32 sdrc_mr);
+ u32 f, u32 sdrc_mr, u32 inc);
u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla,
u32 sdrc_actim_ctrlb, u32 m2, u32 unlock_dll,
- u32 f, u32 sdrc_mr)
+ u32 f, u32 sdrc_mr, u32 inc)
{
BUG_ON(!_omap3_sram_configure_core_dpll);
return _omap3_sram_configure_core_dpll(sdrc_rfr_ctrl,
sdrc_actim_ctrla,
sdrc_actim_ctrlb, m2,
- unlock_dll, f, sdrc_mr);
+ unlock_dll, f, sdrc_mr, inc);
}
/* REVISIT: Should this be same as omap34xx_sram_init() after off-idle? */