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From: Christophe Kerello <christophe.kerello@st.com>
To: <miquel.raynal@bootlin.com>, <richard@nod.at>, <vigneshr@ti.com>,
	<lee.jones@linaro.org>, <robh+dt@kernel.org>,
	<mark.rutland@arm.com>, <tony@atomide.com>
Cc: marex@denx.de, Christophe Kerello <christophe.kerello@st.com>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com
Subject: [04/12] mtd: rawnand: stm32_fmc2: manage all errors cases at probe time
Date: Mon, 23 Mar 2020 15:58:44 +0100	[thread overview]
Message-ID: <1584975532-8038-5-git-send-email-christophe.kerello@st.com> (raw)
In-Reply-To: <1584975532-8038-1-git-send-email-christophe.kerello@st.com>

This patch defers its probe when the expected reset control is not
yet ready. This patch also handles properly all errors cases at probe
time.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
---
 drivers/mtd/nand/raw/stm32_fmc2_nand.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index b6d45cd..0a96797 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -1967,7 +1967,11 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
 	}
 
 	rstc = devm_reset_control_get(dev, NULL);
-	if (!IS_ERR(rstc)) {
+	if (IS_ERR(rstc)) {
+		ret = PTR_ERR(rstc);
+		if (ret == -EPROBE_DEFER)
+			goto err_clk_disable;
+	} else {
 		reset_control_assert(rstc);
 		reset_control_deassert(rstc);
 	}
@@ -1975,7 +1979,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
 	/* DMA setup */
 	ret = stm32_fmc2_dma_setup(fmc2);
 	if (ret)
-		return ret;
+		goto err_dma_setup;
 
 	/* FMC2 init routine */
 	stm32_fmc2_init(fmc2);
@@ -1997,7 +2001,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
 	/* Scan to find existence of the device */
 	ret = nand_scan(chip, nand->ncs);
 	if (ret)
-		goto err_scan;
+		goto err_dma_setup;
 
 	ret = mtd_device_register(mtd, NULL, 0);
 	if (ret)
@@ -2010,7 +2014,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
 err_device_register:
 	nand_cleanup(chip);
 
-err_scan:
+err_dma_setup:
 	if (fmc2->dma_ecc_ch)
 		dma_release_channel(fmc2->dma_ecc_ch);
 	if (fmc2->dma_tx_ch)
@@ -2021,6 +2025,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
 	sg_free_table(&fmc2->dma_data_sg);
 	sg_free_table(&fmc2->dma_ecc_sg);
 
+err_clk_disable:
 	clk_disable_unprepare(fmc2->clk);
 
 	return ret;
-- 
1.9.1


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  parent reply	other threads:[~2020-03-23 15:01 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 14:58 [00/12] add STM32 FMC2 controller drivers Christophe Kerello
2020-03-23 14:58 ` [01/12] dt-bindings: mfd: stm32-fmc2: add STM32 FMC2 controller documentation Christophe Kerello
2020-03-23 14:58 ` [02/12] mfd: stm32-fmc2: add STM32 FMC2 controller driver Christophe Kerello
2020-03-29 23:36   ` Marek Vasut
2020-03-30  9:18     ` Christophe Kerello
2020-03-23 14:58 ` [03/12] bus: stm32-fmc2-ebi: add STM32 FMC2 EBI " Christophe Kerello
2020-03-30  1:24   ` Marek Vasut
2020-03-30  9:19     ` Christophe Kerello
2020-03-30  9:30       ` Marek Vasut
2020-03-23 14:58 ` Christophe Kerello [this message]
2020-03-23 14:58 ` [05/12] mtd: rawnand: stm32_fmc2: remove useless inline comments Christophe Kerello
2020-03-23 14:58 ` [06/12] mtd: rawnand: stm32_fmc2: use FMC2_TIMEOUT_MS for timeouts Christophe Kerello
2020-03-23 14:58 ` [07/12] mtd: rawnand: stm32_fmc2: cleanup Christophe Kerello
2020-03-23 14:58 ` [08/12] mtd: rawnand: stm32_fmc2: use FIELD_PREP/FIELD_GET macros Christophe Kerello
2020-03-23 14:58 ` [09/12] mtd: rawnand: stm32_fmc2: move all registers Christophe Kerello
2020-03-23 14:58 ` [10/12] mtd: rawnand: stm32_fmc2: use regmap APIs Christophe Kerello
2020-03-24  0:44   ` Marek Vasut
2020-03-24 10:38     ` Christophe Kerello
2020-03-23 14:58 ` [11/12] mtd: rawnand: stm32_fmc2: use stm32_fmc2 structure in nfc controller Christophe Kerello
2020-03-23 14:58 ` [12/12] mtd: rawnand: stm32_fmc2: add new MP1 compatible string Christophe Kerello
2020-03-24  0:37 ` [00/12] add STM32 FMC2 controller drivers Marek Vasut
2020-03-24  7:36   ` Christophe Kerello
2020-03-24 13:27     ` Marek Vasut
2020-03-24 13:37       ` Christophe Kerello

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