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SubjectRe: [PATCH 02/10] drm: bridge: it66121: Use devm_regulator_bulk_get_enable()
On Wed, 14 Dec 2022 at 13:58, Paul Cercueil <paul@crapouillou.net> wrote:
>
> Simplify the code of the driver by using
> devm_regulator_bulk_get_enable(), which will handle powering up the
> regulators, and disabling them on probe error or module removal.
>
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
> drivers/gpu/drm/bridge/ite-it66121.c | 34 +++++++---------------------
> 1 file changed, 8 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
> index 7476cfbf9585..a698eec8f250 100644
> --- a/drivers/gpu/drm/bridge/ite-it66121.c
> +++ b/drivers/gpu/drm/bridge/ite-it66121.c
> @@ -301,7 +301,6 @@ struct it66121_ctx {
> struct device *dev;
> struct gpio_desc *gpio_reset;
> struct i2c_client *client;
> - struct regulator_bulk_data supplies[3];
> u32 bus_width;
> struct mutex lock; /* Protects fields below and device registers */
> struct hdmi_avi_infoframe hdmi_avi_infoframe;
> @@ -342,16 +341,6 @@ static void it66121_hw_reset(struct it66121_ctx *ctx)
> gpiod_set_value(ctx->gpio_reset, 0);
> }
>
> -static inline int ite66121_power_on(struct it66121_ctx *ctx)
> -{
> - return regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> -}
> -
> -static inline int ite66121_power_off(struct it66121_ctx *ctx)
> -{
> - return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> -}
> -
> static inline int it66121_preamble_ddc(struct it66121_ctx *ctx)
> {
> return regmap_write(ctx->regmap, IT66121_MASTER_SEL_REG, IT66121_MASTER_SEL_HOST);
> @@ -1512,6 +1501,10 @@ static int it66121_audio_codec_init(struct it66121_ctx *ctx, struct device *dev)
> return PTR_ERR_OR_ZERO(ctx->audio.pdev);
> }
>
> +static const char * const it66121_supplies[] = {
> + "vcn33", "vcn18", "vrf12"
> +};
> +
> static int it66121_probe(struct i2c_client *client)
> {
> u32 revision_id, vendor_ids[2] = { 0 }, device_ids[2] = { 0 };
> @@ -1564,26 +1557,18 @@ static int it66121_probe(struct i2c_client *client)
> i2c_set_clientdata(client, ctx);
> mutex_init(&ctx->lock);
>
> - ctx->supplies[0].supply = "vcn33";
> - ctx->supplies[1].supply = "vcn18";
> - ctx->supplies[2].supply = "vrf12";
> - ret = devm_regulator_bulk_get(ctx->dev, 3, ctx->supplies);
> + ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(it66121_supplies),
> + it66121_supplies);
> if (ret) {
> - dev_err(ctx->dev, "regulator_bulk failed\n");
> + dev_err(dev, "Failed to enable power supplies\n");
> return ret;
> }
>
> - ret = ite66121_power_on(ctx);
> - if (ret)
> - return ret;
> -
> it66121_hw_reset(ctx);
>
> ctx->regmap = devm_regmap_init_i2c(client, &it66121_regmap_config);
> - if (IS_ERR(ctx->regmap)) {
> - ite66121_power_off(ctx);
> + if (IS_ERR(ctx->regmap))
> return PTR_ERR(ctx->regmap);
> - }
>
> regmap_read(ctx->regmap, IT66121_VENDOR_ID0_REG, &vendor_ids[0]);
> regmap_read(ctx->regmap, IT66121_VENDOR_ID1_REG, &vendor_ids[1]);
> @@ -1596,7 +1581,6 @@ static int it66121_probe(struct i2c_client *client)
>
> if (vendor_ids[0] != IT66121_VENDOR_ID0 || vendor_ids[1] != IT66121_VENDOR_ID1 ||
> device_ids[0] != IT66121_DEVICE_ID0 || device_ids[1] != IT66121_DEVICE_ID1) {
> - ite66121_power_off(ctx);
> return -ENODEV;
> }
>
> @@ -1609,7 +1593,6 @@ static int it66121_probe(struct i2c_client *client)
> IRQF_ONESHOT, dev_name(dev), ctx);
> if (ret < 0) {
> dev_err(dev, "Failed to request irq %d:%d\n", client->irq, ret);
> - ite66121_power_off(ctx);
> return ret;
> }
>
> @@ -1626,7 +1609,6 @@ static void it66121_remove(struct i2c_client *client)
> {
> struct it66121_ctx *ctx = i2c_get_clientdata(client);
>
> - ite66121_power_off(ctx);
> drm_bridge_remove(&ctx->bridge);
> mutex_destroy(&ctx->lock);
> }
> --
> 2.35.1
>

Reviewed-by: Robert Foss <robert.foss@linaro.org>

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