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    SubjectRe: [RESEND PATCH v3 06/10] mfd: wm5110: Add register patch required for low power sleep
    On Mon, 11 May 2015, Charles Keepax wrote:

    > Some register settings must be applied before the first time low power
    > sleep mode is entered on the wm5110 to ensure optimium performance.
    > These settings require SYSCLK to be enabled whilst they are being
    > applied. This patch applies the settings using the recently factored out
    > boot time SYSCLK functionality.
    >
    > Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
    > Acked-by: Lee Jones <lee.jones@linaro.org>
    > ---
    > drivers/mfd/arizona-core.c | 39 +++++++++++++++++++++++++++++++++++++++
    > 1 files changed, 39 insertions(+), 0 deletions(-)

    Applied, thanks.

    > diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
    > index b5a7e0e..c80ab79 100644
    > --- a/drivers/mfd/arizona-core.c
    > +++ b/drivers/mfd/arizona-core.c
    > @@ -378,6 +378,35 @@ err:
    > return ret ?: err;
    > }
    >
    > +/*
    > + * Register patch to some of the CODECs internal write sequences
    > + * to ensure a clean exit from the low power sleep state.
    > + */
    > +static const struct reg_default wm5110_sleep_patch[] = {
    > + { 0x337A, 0xC100 },
    > + { 0x337B, 0x0041 },
    > + { 0x3300, 0xA210 },
    > + { 0x3301, 0x050C },
    > +};
    > +
    > +static int wm5110_apply_sleep_patch(struct arizona *arizona)
    > +{
    > + struct arizona_sysclk_state state;
    > + int err, ret;
    > +
    > + ret = arizona_enable_freerun_sysclk(arizona, &state);
    > + if (ret)
    > + return ret;
    > +
    > + ret = regmap_multi_reg_write_bypassed(arizona->regmap,
    > + wm5110_sleep_patch,
    > + ARRAY_SIZE(wm5110_sleep_patch));
    > +
    > + err = arizona_disable_freerun_sysclk(arizona, &state);
    > +
    > + return ret ?: err;
    > +}
    > +
    > static int wm5102_clear_write_sequencer(struct arizona *arizona)
    > {
    > int ret;
    > @@ -966,6 +995,16 @@ int arizona_dev_init(struct arizona *arizona)
    > goto err_reset;
    > }
    > break;
    > + case WM5110:
    > + case WM8280:
    > + ret = wm5110_apply_sleep_patch(arizona);
    > + if (ret) {
    > + dev_err(arizona->dev,
    > + "Failed to apply sleep patch: %d\n",
    > + ret);
    > + goto err_reset;
    > + }
    > + break;
    > default:
    > break;
    > }

    --
    Lee Jones
    Linaro STMicroelectronics Landing Team Lead
    Linaro.org │ Open source software for ARM SoCs
    Follow Linaro: Facebook | Twitter | Blog


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