From: Billy Tsai <billy_tsai@aspeedtech.com>
To: <jic23@kernel.org>, <lars@metafoo.de>, <pmeerw@pmeerw.net>,
<robh+dt@kernel.org>, <joel@jms.id.au>, <andrew@aj.id.au>,
<p.zabel@pengutronix.de>, <lgirdwood@gmail.com>,
<broonie@kernel.org>, <linux-iio@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>
Cc: <BMC-SW@aspeedtech.com>
Subject: [v3 09/15] iio: adc: aspeed: Use devm_add_action_or_reset.
Date: Mon, 16 Aug 2021 18:48:40 +0800 [thread overview]
Message-ID: <20210816104846.13155-10-billy_tsai@aspeedtech.com> (raw)
In-Reply-To: <20210816104846.13155-1-billy_tsai@aspeedtech.com>
This patch use devm_add_action_or_reset to handle the error in probe
phase.
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
---
drivers/iio/adc/aspeed_adc.c | 92 +++++++++++++++++++++---------------
1 file changed, 55 insertions(+), 37 deletions(-)
diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 52db38be9699..1c87e12a0cab 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -187,6 +187,27 @@ static const struct iio_info aspeed_adc_iio_info = {
.debugfs_reg_access = aspeed_adc_reg_access,
};
+static void aspeed_adc_unregister_divider(void *data)
+{
+ struct clk_hw *clk = data;
+
+ clk_hw_unregister_divider(clk);
+}
+
+static void aspeed_adc_reset_assert(void *data)
+{
+ struct reset_control *rst = data;
+
+ reset_control_assert(rst);
+}
+
+static void aspeed_adc_clk_disable_unprepare(void *data)
+{
+ struct clk *clk = data;
+
+ clk_disable_unprepare(clk);
+}
+
static int aspeed_adc_vref_config(struct iio_dev *indio_dev)
{
struct aspeed_adc_data *data = iio_priv(indio_dev);
@@ -232,6 +253,12 @@ static int aspeed_adc_probe(struct platform_device *pdev)
&data->clk_lock);
if (IS_ERR(data->clk_prescaler))
return PTR_ERR(data->clk_prescaler);
+
+ ret = devm_add_action_or_reset(data->dev,
+ aspeed_adc_unregister_divider,
+ data->clk_prescaler);
+ if (ret)
+ return ret;
snprintf(clk_parent_name, 32, clk_name);
scaler_flags = CLK_SET_RATE_PARENT;
}
@@ -244,23 +271,30 @@ static int aspeed_adc_probe(struct platform_device *pdev)
&pdev->dev, clk_name, clk_parent_name, scaler_flags,
data->base + ASPEED_REG_CLOCK_CONTROL, 0,
data->model_data->scaler_bit_width, 0, &data->clk_lock);
- if (IS_ERR(data->clk_scaler)) {
- ret = PTR_ERR(data->clk_scaler);
- goto scaler_error;
- }
+ if (IS_ERR(data->clk_scaler))
+ return PTR_ERR(data->clk_scaler);
+
+ ret = devm_add_action_or_reset(data->dev, aspeed_adc_unregister_divider,
+ data->clk_scaler);
+ if (ret)
+ return ret;
data->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (IS_ERR(data->rst)) {
dev_err(&pdev->dev,
"invalid or missing reset controller device tree entry");
- ret = PTR_ERR(data->rst);
- goto reset_error;
+ return PTR_ERR(data->rst);
}
reset_control_deassert(data->rst);
+ ret = devm_add_action_or_reset(data->dev, aspeed_adc_reset_assert,
+ data->rst);
+ if (ret)
+ return ret;
+
ret = aspeed_adc_vref_config(indio_dev);
if (ret)
- goto vref_config_error;
+ return ret;
if (data->model_data->wait_init_sequence) {
/* Enable engine in normal mode. */
@@ -277,13 +311,19 @@ static int aspeed_adc_probe(struct platform_device *pdev)
ASPEED_ADC_INIT_POLLING_TIME,
ASPEED_ADC_INIT_TIMEOUT);
if (ret)
- goto poll_timeout_error;
+ return ret;
}
/* Start all channels in normal mode. */
ret = clk_prepare_enable(data->clk_scaler->clk);
if (ret)
- goto clk_enable_error;
+ return ret;
+
+ ret = devm_add_action_or_reset(data->dev,
+ aspeed_adc_clk_disable_unprepare,
+ data->clk_scaler->clk);
+ if (ret)
+ return ret;
adc_engine_control_reg_val =
ASPEED_ADC_CTRL_CHANNEL |
@@ -299,41 +339,19 @@ static int aspeed_adc_probe(struct platform_device *pdev)
indio_dev->num_channels = data->model_data->num_channels;
ret = iio_device_register(indio_dev);
- if (ret)
- goto iio_register_error;
-
+ if (ret) {
+ writel(FIELD_PREP(ASPEED_ADC_OP_MODE,
+ ASPEED_ADC_OP_MODE_PWR_DOWN),
+ data->base + ASPEED_REG_ENGINE_CONTROL);
+ return ret;
+ }
return 0;
-
-iio_register_error:
- writel(FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_PWR_DOWN),
- data->base + ASPEED_REG_ENGINE_CONTROL);
- clk_disable_unprepare(data->clk_scaler->clk);
-clk_enable_error:
-poll_timeout_error:
-vref_config_error:
- reset_control_assert(data->rst);
-reset_error:
- clk_hw_unregister_divider(data->clk_scaler);
-scaler_error:
- if (data->model_data->need_prescaler)
- clk_hw_unregister_divider(data->clk_prescaler);
- return ret;
}
static int aspeed_adc_remove(struct platform_device *pdev)
{
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
- struct aspeed_adc_data *data = iio_priv(indio_dev);
-
iio_device_unregister(indio_dev);
- writel(FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_PWR_DOWN),
- data->base + ASPEED_REG_ENGINE_CONTROL);
- clk_disable_unprepare(data->clk_scaler->clk);
- reset_control_assert(data->rst);
- clk_hw_unregister_divider(data->clk_scaler);
- if (data->model_data->need_prescaler)
- clk_hw_unregister_divider(data->clk_prescaler);
-
return 0;
}
--
2.25.1
next prev parent reply other threads:[~2021-08-16 10:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-16 10:48 [v3 00/15] Add support for ast2600 ADC Billy Tsai
2021-08-16 10:48 ` [v3 01/15] dt-bindings: iio: adc: Add ast2600-adc bindings Billy Tsai
2021-08-16 20:07 ` Rob Herring
2021-08-16 10:48 ` [v3 02/15] iio: adc: aspeed: completes the bitfield declare Billy Tsai
2021-08-16 10:48 ` [v3 03/15] iio: adc: aspeed: set driver data when adc probe Billy Tsai
2021-08-16 10:48 ` [v3 04/15] iio: adc: aspeed: Keep model data to driver data Billy Tsai
2021-08-16 10:48 ` [v3 05/15] iio: adc: aspeed: Refactory model data structure Billy Tsai
2021-08-16 10:48 ` [v3 06/15] iio: adc: aspeed: Add vref config function Billy Tsai
2021-08-16 10:48 ` [v3 07/15] iio: adc: aspeed: Set num_channels with model data Billy Tsai
2021-08-16 10:48 ` Billy Tsai [this message]
2021-08-16 10:48 ` [v3 11/15] iio: adc: aspeed: Fix the calculate error of clock Billy Tsai
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