From patchwork Thu Sep 12 14:41:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 829113 Received: from fgw21-7.mail.saunalahti.fi (fgw21-7.mail.saunalahti.fi [62.142.5.82]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6391D1B1D5F for ; Thu, 12 Sep 2024 14:42:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.142.5.82 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726152139; cv=none; b=NlUP9xDfPs3/6EP6vC6bpJx7QFDYjUSdy8hILAbeXLqcGUCEjkEh+uq/FBxwxMjWUaydsctnc1Wt1/1Snq0rSw+GmGcj8EC1mCY4Uw0R7gKzlVeTpJ4Mc2idBMh3L+ULgW46v5R+3vGho1v9JOZFsp6/dWfC5lsJCmdlru0hHyg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726152139; c=relaxed/simple; bh=eFo8M1L8R7wjkPEig4kgYKYx7zNgDhbmpnAZ+9y3Vmg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JA9PfA6cMqlUhhh4+OcQtG+D72kEqVgCUSMaN/KLbjl3nyiilrSv4MusxfFT7ivWxN66Dbmg+Nwi/CySZDWYoHD8Zt9wSmCeRbxJQ+CCofi/okAy2DxL8GygIDOrFnK6uE930TOQnezTy2WDd6xIo34DXx1H1mGyK1FdbrQ5Hj4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com; spf=fail smtp.mailfrom=gmail.com; arc=none smtp.client-ip=62.142.5.82 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=gmail.com Received: from localhost (88-113-25-87.elisa-laajakaista.fi [88.113.25.87]) by fgw21.mail.saunalahti.fi (Halon) with ESMTP id 0b7c55c8-7115-11ef-812b-005056bdd08f; Thu, 12 Sep 2024 17:41:07 +0300 (EEST) From: Andy Shevchenko To: Ard Biesheuvel , Andi Shyti , Christophe JAILLET , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Andy Shevchenko Subject: [PATCH v1 1/1] i2c: synquacer: Fix clock rate retrieval code Date: Thu, 12 Sep 2024 17:41:05 +0300 Message-ID: <20240912144105.1555624-1-andy.shevchenko@gmail.com> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 With the devm_clk_get_enabled() the probe will fail on the systems that have no clock provided, such as ACPI-based ones. synquacer_i2c SCX0003:00: error -ENOENT: failed to get and enable clock synquacer_i2c SCX0003:00: probe with driver synquacer_i2c failed with error -2 Fix this by switching to devm_clk_get_optional_enabled() in conjunction with NULL check, so we won't overwrite the clock rate from the property. Fixes: 55750148e559 ("i2c: synquacer: Fix an error handling path in synquacer_i2c_probe()") Reported-by: Ard Biesheuvel Closes: https://lore.kernel.org/r/CAMj1kXFH+zB_YuUS+vaEpguhuVGLYbQw55VNDCxnBfSPe6b-nw@mail.gmail.com Signed-off-by: Andy Shevchenko --- drivers/i2c/busses/i2c-synquacer.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-synquacer.c b/drivers/i2c/busses/i2c-synquacer.c index 4eccbcd0fbfc..49d01fa8fb4e 100644 --- a/drivers/i2c/busses/i2c-synquacer.c +++ b/drivers/i2c/busses/i2c-synquacer.c @@ -550,12 +550,12 @@ static int synquacer_i2c_probe(struct platform_device *pdev) device_property_read_u32(&pdev->dev, "socionext,pclk-rate", &i2c->pclkrate); - pclk = devm_clk_get_enabled(&pdev->dev, "pclk"); + pclk = devm_clk_get_optional_enabled(&pdev->dev, "pclk"); if (IS_ERR(pclk)) return dev_err_probe(&pdev->dev, PTR_ERR(pclk), "failed to get and enable clock\n"); - - i2c->pclkrate = clk_get_rate(pclk); + if (pclk) + i2c->pclkrate = clk_get_rate(pclk); if (i2c->pclkrate < SYNQUACER_I2C_MIN_CLK_RATE || i2c->pclkrate > SYNQUACER_I2C_MAX_CLK_RATE)