From: Clark Wang <xiaoning.wang@nxp.com>
To: aisheng.dong@nxp.com, shawnguo@kernel.org, s.hauer@pengutronix.de
Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
sumit.semwal@linaro.org, christian.koenig@amd.com,
linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 04/11] i2c: imx-lpi2c: manage irq resource request/release in runtime pm
Date: Wed, 17 Mar 2021 14:53:52 +0800 [thread overview]
Message-ID: <20210317065359.3109394-5-xiaoning.wang@nxp.com> (raw)
In-Reply-To: <20210317065359.3109394-1-xiaoning.wang@nxp.com>
From: Fugang Duan <fugang.duan@nxp.com>
Manage irq resource request/release in runtime pm to save irq domain's
power.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
drivers/i2c/busses/i2c-imx-lpi2c.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 664fcc0dba51..e718bb6b2387 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -94,6 +94,7 @@ enum lpi2c_imx_pincfg {
struct lpi2c_imx_struct {
struct i2c_adapter adapter;
+ int irq;
struct clk *clk_per;
struct clk *clk_ipg;
void __iomem *base;
@@ -543,7 +544,7 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
{
struct lpi2c_imx_struct *lpi2c_imx;
unsigned int temp;
- int irq, ret;
+ int ret;
lpi2c_imx = devm_kzalloc(&pdev->dev, sizeof(*lpi2c_imx), GFP_KERNEL);
if (!lpi2c_imx)
@@ -553,9 +554,9 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
if (IS_ERR(lpi2c_imx->base))
return PTR_ERR(lpi2c_imx->base);
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
+ lpi2c_imx->irq = platform_get_irq(pdev, 0);
+ if (lpi2c_imx->irq < 0)
+ return lpi2c_imx->irq;
lpi2c_imx->adapter.owner = THIS_MODULE;
lpi2c_imx->adapter.algo = &lpi2c_imx_algo;
@@ -581,14 +582,6 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
if (ret)
lpi2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ;
- ret = devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr,
- IRQF_NO_SUSPEND,
- pdev->name, lpi2c_imx);
- if (ret) {
- dev_err(&pdev->dev, "can't claim irq %d\n", irq);
- return ret;
- }
-
i2c_set_adapdata(&lpi2c_imx->adapter, lpi2c_imx);
platform_set_drvdata(pdev, lpi2c_imx);
@@ -640,6 +633,7 @@ static int __maybe_unused lpi2c_runtime_suspend(struct device *dev)
{
struct lpi2c_imx_struct *lpi2c_imx = dev_get_drvdata(dev);
+ devm_free_irq(dev, lpi2c_imx->irq, lpi2c_imx);
clk_disable_unprepare(lpi2c_imx->clk_ipg);
clk_disable_unprepare(lpi2c_imx->clk_per);
pinctrl_pm_select_idle_state(dev);
@@ -665,6 +659,14 @@ static int __maybe_unused lpi2c_runtime_resume(struct device *dev)
dev_err(dev, "can't enable I2C ipg clock, ret=%d\n", ret);
}
+ ret = devm_request_irq(dev, lpi2c_imx->irq, lpi2c_imx_isr,
+ IRQF_NO_SUSPEND,
+ dev_name(dev), lpi2c_imx);
+ if (ret) {
+ dev_err(dev, "can't claim irq %d\n", lpi2c_imx->irq);
+ return ret;
+ }
+
return ret;
}
--
2.25.1
next prev parent reply other threads:[~2021-03-17 6:54 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 6:53 [PATCH 00/11] i2c: imx-lpi2c: New features and bug fixes Clark Wang
2021-03-17 6:53 ` [PATCH 01/11] i2c: imx-lpi2c: directly retrun ISR when detect a NACK Clark Wang
2021-03-19 4:25 ` Aisheng Dong
2021-03-17 6:53 ` [PATCH 02/11] i2c: imx-lpi2c: add runtime pm support Clark Wang
2021-03-19 4:40 ` Aisheng Dong
2021-03-19 5:33 ` Clark Wang
2021-03-19 6:16 ` Clark Wang
2021-03-19 8:00 ` Clark Wang
2021-03-19 10:26 ` Aisheng Dong
2021-03-17 6:53 ` [PATCH 03/11] i2c: imx-lpi2c: add ipg clk for lpi2c driver Clark Wang
2021-03-19 4:46 ` Aisheng Dong
2021-03-19 6:23 ` Clark Wang
2021-03-19 9:18 ` Aisheng Dong
2021-03-17 6:53 ` Clark Wang [this message]
2021-03-19 4:53 ` [PATCH 04/11] i2c: imx-lpi2c: manage irq resource request/release in runtime pm Aisheng Dong
2021-03-19 7:03 ` Clark Wang
2021-03-19 10:12 ` Aisheng Dong
2021-03-17 6:53 ` [PATCH 05/11] i2c: imx-lpi2c: add debug message when i2c peripheral clk doesn't work Clark Wang
2021-03-19 4:56 ` Aisheng Dong
2021-03-19 7:07 ` Clark Wang
2021-03-17 6:53 ` [PATCH 06/11] i2c: imx-lpi2c: improve i2c driver probe priority Clark Wang
2021-03-19 5:05 ` Aisheng Dong
2021-03-19 5:38 ` Wolfram Sang
2021-03-19 7:39 ` [EXT] " Clark Wang
2021-03-17 6:53 ` [PATCH 07/11] i2c: imx-lpi2c: increase PM timeout to avoid operate clk frequently Clark Wang
2021-03-19 5:10 ` Aisheng Dong
2021-03-17 6:53 ` [PATCH 08/11] i2c: imx-lpi2c: add bus recovery feature Clark Wang
2021-03-19 5:11 ` Aisheng Dong
2021-03-17 6:53 ` [PATCH 09/11] i2c: imx-lpi2c: fix i2c timing issue Clark Wang
2021-03-19 5:15 ` Aisheng Dong
2021-03-19 7:21 ` Clark Wang
2021-03-17 6:53 ` [PATCH 10/11] i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle Clark Wang
2021-03-19 5:16 ` Aisheng Dong
2021-03-17 6:53 ` [PATCH 11/11] i2c: imx-lpi2c: add edma mode support Clark Wang
2021-03-19 5:28 ` Aisheng Dong
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