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From: Clark Wang <xiaoning.wang@nxp.com>
To: aisheng.dong@nxp.com, robh+dt@kernel.org, shawnguo@kernel.org,
	s.hauer@pengutronix.de, festevam@gmail.com
Cc: kernel@pengutronix.de, linux-imx@nxp.com,
	linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH V2 08/18] i2c: imx-lpi2c: add debug message when i2c peripheral clk doesn't work
Date: Tue,  6 Apr 2021 19:32:56 +0800	[thread overview]
Message-ID: <20210406113306.2633595-9-xiaoning.wang@nxp.com> (raw)
In-Reply-To: <20210406113306.2633595-1-xiaoning.wang@nxp.com>

From: Gao Pan <pandy.gao@nxp.com>

add debug message when i2c peripheral clk rate is 0, then
directly return -EINVAL.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Andy Duan <fugang.duan@nxp.com>
---
V2 changes:
 - Add my signed-off.
---
 drivers/i2c/busses/i2c-imx-lpi2c.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 333209ba81c1..dfec334712c2 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -210,6 +210,11 @@ static int lpi2c_imx_config(struct lpi2c_imx_struct *lpi2c_imx)
 	lpi2c_imx_set_mode(lpi2c_imx);
 
 	clk_rate = clk_get_rate(lpi2c_imx->clk_per);
+	if (!clk_rate) {
+		dev_dbg(&lpi2c_imx->adapter.dev, "clk_per rate is 0\n");
+		return -EINVAL;
+	}
+
 	if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST)
 		filt = 0;
 	else
-- 
2.25.1


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  parent reply	other threads:[~2021-04-06 11:37 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-06 11:32 [PATCH V2 00/18] i2c: imx-lpi2c: New features and bug fixes Clark Wang
2021-04-06 11:32 ` [PATCH V2 01/18] i2c: imx-lpi2c: directly retrun ISR when detect a NACK Clark Wang
2021-04-06 11:32 ` [PATCH V2 02/18] i2c: imx-lpi2c: add ipg clk for lpi2c driver Clark Wang
2021-05-21  6:14   ` Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 03/18] ARM: dts: imx7ulp: add the missing lpi2c ipg clock Clark Wang
2021-05-21  6:17   ` Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 04/18] ARM: dts: imx7ulp: add the missing lpi2c nodes Clark Wang
2021-05-21  6:25   ` Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 05/18] ARM64: dts: imx8: add the missing lpi2c ipg clock Clark Wang
2021-05-11  2:59   ` Shawn Guo
2021-05-21  6:28   ` Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 06/18] ARM64: dts: imx8: change i2c irq number to non-combined Clark Wang
2021-05-21  6:32   ` Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 07/18] i2c: imx-lpi2c: manage irq resource request/release in runtime pm Clark Wang
2021-05-21  6:38   ` Aisheng Dong
2021-04-06 11:32 ` Clark Wang [this message]
2021-05-21  6:43   ` [PATCH V2 08/18] i2c: imx-lpi2c: add debug message when i2c peripheral clk doesn't work Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 09/18] i2c: imx-lpi2c: increase PM timeout to avoid operate clk frequently Clark Wang
2021-04-06 11:32 ` [PATCH V2 10/18] i2c: imx-lpi2c: add bus recovery feature Clark Wang
2021-04-07  0:34   ` kernel test robot
2021-05-21  6:44   ` Aisheng Dong
2021-04-06 11:32 ` [PATCH V2 11/18] dt-bindings: i2c: imx-lpi2c: Add bus recovery example Clark Wang
2021-04-06 13:24   ` Rob Herring
2021-05-21  7:02   ` Aisheng Dong
2021-04-06 11:33 ` [PATCH V2 12/18] i2c: imx-lpi2c: fix i2c timing issue Clark Wang
2021-04-06 11:33 ` [PATCH V2 13/18] i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle Clark Wang
2021-04-06 11:33 ` [PATCH V2 14/18] i2c: imx-lpi2c: add edma mode support Clark Wang
2021-04-06 11:41   ` Clark Wang
2021-04-06 11:33 ` [PATCH V2 15/18] dt-bindings: i2c: imx-lpi2c: Add dma configuration example Clark Wang
2021-04-09 16:33   ` Rob Herring
2021-04-06 11:33 ` [PATCH V2 16/18] ARM: dts: imx7ulp: add dma configurations for lpi2c Clark Wang
2021-04-06 11:33 ` [PATCH V2 17/18] ARM: dts: imx7ulp: add the missing status property of lpi2c5 Clark Wang
2021-04-06 11:33 ` [PATCH V2 18/18] i2c: imx-lpi2c: fix pio mode cannot send 256+ bytes in one frame Clark Wang

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