Tero Kristo <tero.kristo@xxxxxxxxx> writes:
> Noncore dpll can enter autoidle state, in which case the rate calculation
> fails. Fixed by checking dpll mode instead of idle status.
>
> Signed-off-by: Tero Kristo <tero.kristo@xxxxxxxxx>
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
> ---
> arch/arm/mach-omap2/clock.c | 16 +++++++++++-----
> arch/arm/mach-omap2/cm-regbits-34xx.h | 2 ++
> 2 files changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
> index 522ce6f..bbd3e82 100644
> --- a/arch/arm/mach-omap2/clock.c
> +++ b/arch/arm/mach-omap2/clock.c
> @@ -212,9 +212,16 @@ u32 omap2_get_dpll_rate(struct clk *clk)
> return 0;
>
> /* Return bypass rate if DPLL is bypassed */
> - v = cm_read_mod_reg(clk->prcm_mod, dd->idlest_reg);
> - v &= dd->idlest_mask;
> - v >>= __ffs(dd->idlest_mask);
> + if (cpu_is_omap34xx()) {
> + v = cm_read_mod_reg(clk->prcm_mod, dd->control_reg);
> + v &= dd->enable_mask;
> + v >>= __ffs(dd->enable_mask);
> + } else {
> + v = cm_read_mod_reg(clk->prcm_mod, dd->idlest_reg);
> + v &= dd->idlest_mask;
> + v >>= __ffs(dd->idlest_mask);
> + }
> +
> if (cpu_is_omap24xx()) {
>
> if (v == ST_CORE_CLK_REF)
> @@ -224,9 +231,8 @@ u32 omap2_get_dpll_rate(struct clk *clk)
>
> } else if (cpu_is_omap34xx()) {
>
> - if (!v)
> + if (v == OMAP3430_EN_MPU_DPLL_BYPASS)
> return dd->bypass_clk->rate;
> -
> }
>
> v = cm_read_mod_reg(clk->prcm_mod, dd->mult_div1_reg);
> diff --git a/arch/arm/mach-omap2/cm-regbits-34xx.h b/arch/arm/mach-omap2/cm-regbits-34xx.h
> index 6f3f5a3..9995353 100644
> --- a/arch/arm/mach-omap2/cm-regbits-34xx.h
> +++ b/arch/arm/mach-omap2/cm-regbits-34xx.h
> @@ -112,6 +112,8 @@
> #define OMAP3430_EN_MPU_DPLL_DRIFTGUARD_MASK (1 << 3)
> #define OMAP3430_EN_MPU_DPLL_SHIFT 0
> #define OMAP3430_EN_MPU_DPLL_MASK (0x7 << 0)
> +#define OMAP3430_EN_MPU_DPLL_LOCK (0x7 << 0)
> +#define OMAP3430_EN_MPU_DPLL_BYPASS (0x5 << 0)
>
> /* CM_IDLEST_MPU */
> #define OMAP3430_ST_MPU (1 << 0)
> --
> 1.5.4.3
>
> --
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