From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2EC457E79D; Wed, 24 Jan 2024 14:30:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706106643; cv=none; b=RyGUOgSPPpK1XMKNNzgt3jnIiuhHcwTCB5IEG8IN9t++PhhnAgE94k794ZCkgXnDNbqKryLgPn/ul9oSexVsDU/iQNzCwXMnTBJ/Qz+siY+zmAqQ1b2Wnpr5VPVdJHlW8FL2DxEfycjicS/0hUCvWreWD2RyD5/c21aL74Ggcqw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706106643; c=relaxed/simple; bh=t0RZzSt1jjBgxGY4o0ZkWqVOeUyWAuIDWOZJMVJzbJg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KqJCPTvvCpP4jJvl3ZNLaqGjUWtJ148DdHejZpOd4im3xvtLmxD7gdbQRGr6j8erzmUvETwdiAl7l1xtqEdF16Lxo+TBiWsFMBdLng4VjwS8Kfuly0XeKhFOJ1JxzuByFSrUpkQvLdnexpqqs2fsXTy1M7Ql8bHjHBiWY1U9nbU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tu4DTE8D; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="tu4DTE8D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D2F4C433B2; Wed, 24 Jan 2024 14:30:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706106643; bh=t0RZzSt1jjBgxGY4o0ZkWqVOeUyWAuIDWOZJMVJzbJg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tu4DTE8DmWsnv51jiEwStonyfqVFSonzTNMqkY20sUeuBShZ2V2Xp4ppnLY4RY5ko ST+HpRvJjHKBCxG0ekWmKUI/2Pk+97E694PPBOLa83ZExnuk+hmalN/jgxZcHO2UAi h0SrRabyab9eJw8TEGyxDtEhi7OZYSU04y2qMhmgLktShYxcTizH7lzFVfa5QxTuMk HyNKZzoYjpDGXRkoqDlm2GqbjFvusd7dw79fW+YD8ccKN4NKUzCNRMfeP4Gcewvn0c h3fQKRJGENcJQa85aNiiwpJVHUc/XaRnw0SZWwSwQDVcoCBTdSD6quBAmEyeVxInlf /h9SS2kuSPE/A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Harshit Shah , Alexandre Belloni , Sasha Levin , pgaj@cadence.com, linux-i3c@lists.infradead.org Subject: [PATCH AUTOSEL 5.15 6/9] i3c: master: cdns: Update maximum prescaler value for i2c clock Date: Wed, 24 Jan 2024 09:30:09 -0500 Message-ID: <20240124143024.1284046-6-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240124143024.1284046-1-sashal@kernel.org> References: <20240124143024.1284046-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.147 Content-Transfer-Encoding: 8bit From: Harshit Shah [ Upstream commit 374c13f9080a1b9835a5ed3e7bea93cf8e2dc262 ] As per the Cadence IP document fixed the I2C clock divider value limit from 16 bits instead of 10 bits. Without this change setting up the I2C clock to low frequencies will not work as the prescaler value might be greater than 10 bit number. I3C clock divider value is 10 bits only. Updating the macro names for both. Signed-off-by: Harshit Shah Link: https://lore.kernel.org/r/1703927483-28682-1-git-send-email-harshitshah.opendev@gmail.com Signed-off-by: Alexandre Belloni Signed-off-by: Sasha Levin --- drivers/i3c/master/i3c-master-cdns.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/i3c/master/i3c-master-cdns.c b/drivers/i3c/master/i3c-master-cdns.c index 4a49c75a9408..b9cfda6ae9ae 100644 --- a/drivers/i3c/master/i3c-master-cdns.c +++ b/drivers/i3c/master/i3c-master-cdns.c @@ -77,7 +77,8 @@ #define PRESCL_CTRL0 0x14 #define PRESCL_CTRL0_I2C(x) ((x) << 16) #define PRESCL_CTRL0_I3C(x) (x) -#define PRESCL_CTRL0_MAX GENMASK(9, 0) +#define PRESCL_CTRL0_I3C_MAX GENMASK(9, 0) +#define PRESCL_CTRL0_I2C_MAX GENMASK(15, 0) #define PRESCL_CTRL1 0x18 #define PRESCL_CTRL1_PP_LOW_MASK GENMASK(15, 8) @@ -1234,7 +1235,7 @@ static int cdns_i3c_master_bus_init(struct i3c_master_controller *m) return -EINVAL; pres = DIV_ROUND_UP(sysclk_rate, (bus->scl_rate.i3c * 4)) - 1; - if (pres > PRESCL_CTRL0_MAX) + if (pres > PRESCL_CTRL0_I3C_MAX) return -ERANGE; bus->scl_rate.i3c = sysclk_rate / ((pres + 1) * 4); @@ -1247,7 +1248,7 @@ static int cdns_i3c_master_bus_init(struct i3c_master_controller *m) max_i2cfreq = bus->scl_rate.i2c; pres = (sysclk_rate / (max_i2cfreq * 5)) - 1; - if (pres > PRESCL_CTRL0_MAX) + if (pres > PRESCL_CTRL0_I2C_MAX) return -ERANGE; bus->scl_rate.i2c = sysclk_rate / ((pres + 1) * 5); -- 2.43.0