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OMAP3: Add support for DPLL3 divisor values higher than 2

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Previously only 1 and 2 was supported. This is needed for DVFS VDD2 control.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
This commit is contained in:
Tero Kristo 2009-06-19 19:08:29 -06:00 committed by paul
parent df14e4747a
commit 3afec6332e
4 changed files with 15 additions and 14 deletions
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9
arch/arm/mach-omap2/clock34xx.c
View file

@ -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;
}

8
arch/arm/mach-omap2/sram34xx.S
View file

@ -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

6
arch/arm/plat-omap/include/mach/sram.h
View file

@ -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

6
arch/arm/plat-omap/sram.c
View file

@ -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? */