From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6C169C48286 for ; Sat, 27 Jan 2024 19:53:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fGXWyeXBqtv7HCLt8ZARAZludh+rfhIF3ml5setUkIc=; b=s7p0I++I9Pd7bv iPxL+fvIC682xs62FHgQPcc5/ey63lZf0XvoFpFKDY//oXgrBS8p//+RoiqidloeytA+BnfNdNtbB K9GsybxTe4822Q0Ju4LqtbD/FtN4RRv5ipJj6u6PiEY8xU5FOBSjGgVwwdf0i5KzIzEB+JN5Y5Pbq w43fnG/jHOwDJYht9kpQuBrAvjaPp49qqd2pAhrjSQbJ/kkAhbzmZHOBgF5d+xBw6LyMG8VyeYSfx NamtXT88zp0ngaqns4ddbKSE7YShOCEB8Vz2oDAJErLjd/bBH100EUcHkiI2SWjbV5nDQ3XJFPjz6 jCVflE7E7HbAGGL3WdrQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rTojc-000000087uG-0MZI; Sat, 27 Jan 2024 19:53:00 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rSeHY-003gXw-0r for linux-i3c@lists.infradead.org; Wed, 24 Jan 2024 14:31:13 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id C1EA461D78; Wed, 24 Jan 2024 14:31:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96195C433C7; Wed, 24 Jan 2024 14:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706106671; bh=3a0w+hq9uIG+lF49GSCkqotCjAnLCzJvjuyURWaDobs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RxiYV92bv+Xz+kDhOFtCbzWjtfg9LdeuKWdJmjtyHLI3J1pH3HeGsYJMO5BsCFLcI N43OpKDxjyw+RZ0h7ByR1RanP/Ps5sI2U/n1Y7jQYVRBVKquPTvaEFGVysFRvX543g N3Ry5sq72QVLsZDC9nESMUHR9N+F1uAiCEK7U5mEgCs9sNSnep6jCuw0WSsPQsNXqQ 7/Sgi/LUneHKfAbCiff3s5LqNklkdp1/neh2s0gCHcrvGbJ8nW43oD7E2b0S1CquCn XkFvXxbp4lC9PYGNqkxRJXKrts9dpn/yTw+kf4c2FjxiDlVm9MrXY9tWEDQL7AE0QL Zh5PpO+Hu8djQ== 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 5.10 5/7] i3c: master: cdns: Update maximum prescaler value for i2c clock Date: Wed, 24 Jan 2024 09:30:46 -0500 Message-ID: <20240124143057.1284274-5-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240124143057.1284274-1-sashal@kernel.org> References: <20240124143057.1284274-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.10.208 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240124_063112_345408_E058CB82 X-CRM114-Status: UNSURE ( 9.75 ) X-CRM114-Notice: Please train this message. X-Mailman-Approved-At: Sat, 27 Jan 2024 11:52:56 -0800 X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org 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 6b9df33ac561..6b126fce5a9e 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 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c