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Date: Wed, 12 Aug 2015 15:42:57 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
Cc: sameo@...ux.intel.com, patches@...nsource.wolfsonmicro.com,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH V4 1/3] mfd: arizona: factor out DCVDD isolation control
On Wed, 12 Aug 2015, Richard Fitzgerald wrote:
> Currently DCVDD isolation is enabled and disabled for
> runtime_suspend and runtime_resume. Future codecs will not
> have the isolation control so to prepare for these codecs
> this patch factors out the isolation control allowing it to
> be called as needed in the existing codec-specific switch cases.
>
> Signed-off-by: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
> ---
> drivers/mfd/arizona-core.c | 108 ++++++++++++++++++++++++++-------------------
> 1 file changed, 62 insertions(+), 46 deletions(-)
For my own reference:
Acked-by: Lee Jones <lee.jones@...aro.org>
> diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
> index bc814b0..33f3db4 100644
> --- a/drivers/mfd/arizona-core.c
> +++ b/drivers/mfd/arizona-core.c
> @@ -462,6 +462,33 @@ static int wm5102_clear_write_sequencer(struct arizona *arizona)
> }
>
> #ifdef CONFIG_PM
> +static int arizona_isolate_dcvdd(struct arizona *arizona)
> +{
> + int ret;
> +
> + ret = regmap_update_bits(arizona->regmap,
> + ARIZONA_ISOLATION_CONTROL,
> + ARIZONA_ISOLATE_DCVDD1,
> + ARIZONA_ISOLATE_DCVDD1);
> + if (ret != 0)
> + dev_err(arizona->dev, "Failed to isolate DCVDD: %d\n", ret);
> +
> + return ret;
> +}
> +
> +static int arizona_connect_dcvdd(struct arizona *arizona)
> +{
> + int ret;
> +
> + ret = regmap_update_bits(arizona->regmap,
> + ARIZONA_ISOLATION_CONTROL,
> + ARIZONA_ISOLATE_DCVDD1, 0);
> + if (ret != 0)
> + dev_err(arizona->dev, "Failed to connect DCVDD: %d\n", ret);
> +
> + return ret;
> +}
> +
> static int arizona_runtime_resume(struct device *dev)
> {
> struct arizona *arizona = dev_get_drvdata(dev);
> @@ -501,14 +528,9 @@ static int arizona_runtime_resume(struct device *dev)
> switch (arizona->type) {
> case WM5102:
> if (arizona->external_dcvdd) {
> - ret = regmap_update_bits(arizona->regmap,
> - ARIZONA_ISOLATION_CONTROL,
> - ARIZONA_ISOLATE_DCVDD1, 0);
> - if (ret != 0) {
> - dev_err(arizona->dev,
> - "Failed to connect DCVDD: %d\n", ret);
> + ret = arizona_connect_dcvdd(arizona);
> + if (ret != 0)
> goto err;
> - }
> }
>
> ret = wm5102_patch(arizona);
> @@ -533,14 +555,9 @@ static int arizona_runtime_resume(struct device *dev)
> goto err;
>
> if (arizona->external_dcvdd) {
> - ret = regmap_update_bits(arizona->regmap,
> - ARIZONA_ISOLATION_CONTROL,
> - ARIZONA_ISOLATE_DCVDD1, 0);
> - if (ret) {
> - dev_err(arizona->dev,
> - "Failed to connect DCVDD: %d\n", ret);
> + ret = arizona_connect_dcvdd(arizona);
> + if (ret != 0)
> goto err;
> - }
> } else {
> /*
> * As this is only called for the internal regulator
> @@ -572,14 +589,9 @@ static int arizona_runtime_resume(struct device *dev)
> }
>
> if (arizona->external_dcvdd) {
> - ret = regmap_update_bits(arizona->regmap,
> - ARIZONA_ISOLATION_CONTROL,
> - ARIZONA_ISOLATE_DCVDD1, 0);
> - if (ret != 0) {
> - dev_err(arizona->dev,
> - "Failed to connect DCVDD: %d\n", ret);
> + ret = arizona_connect_dcvdd(arizona);
> + if (ret != 0)
> goto err;
> - }
> }
> break;
> }
> @@ -612,37 +624,36 @@ static int arizona_runtime_suspend(struct device *dev)
> return ret;
> }
>
> - if (arizona->external_dcvdd) {
> - ret = regmap_update_bits(arizona->regmap,
> - ARIZONA_ISOLATION_CONTROL,
> - ARIZONA_ISOLATE_DCVDD1,
> - ARIZONA_ISOLATE_DCVDD1);
> - if (ret != 0) {
> - dev_err(arizona->dev, "Failed to isolate DCVDD: %d\n",
> - ret);
> - return ret;
> - }
> - }
> -
> switch (arizona->type) {
> case WM5110:
> case WM8280:
> - if (arizona->external_dcvdd)
> - break;
> -
> - /*
> - * As this is only called for the internal regulator
> - * (where we know voltage ranges available) it is ok
> - * to request an exact range.
> - */
> - ret = regulator_set_voltage(arizona->dcvdd, 1175000, 1175000);
> - if (ret < 0) {
> - dev_err(arizona->dev,
> - "Failed to set suspend voltage: %d\n", ret);
> - return ret;
> + if (arizona->external_dcvdd) {
> + ret = arizona_isolate_dcvdd(arizona);
> + if (ret != 0)
> + return ret;
> + } else {
> + /*
> + * As this is only called for the internal regulator
> + * (where we know voltage ranges available) it is ok
> + * to request an exact range.
> + */
> + ret = regulator_set_voltage(arizona->dcvdd,
> + 1175000, 1175000);
> + if (ret < 0) {
> + dev_err(arizona->dev,
> + "Failed to set suspend voltage: %d\n",
> + ret);
> + return ret;
> + }
> }
> break;
> case WM5102:
> + if (arizona->external_dcvdd) {
> + ret = arizona_isolate_dcvdd(arizona);
> + if (ret != 0)
> + return ret;
> + }
> +
> if (!(val & ARIZONA_JD1_ENA)) {
> ret = regmap_write(arizona->regmap,
> ARIZONA_WRITE_SEQUENCER_CTRL_3, 0x0);
> @@ -655,6 +666,11 @@ static int arizona_runtime_suspend(struct device *dev)
> }
> break;
> default:
> + if (arizona->external_dcvdd) {
> + ret = arizona_isolate_dcvdd(arizona);
> + if (ret != 0)
> + return ret;
> + }
> 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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