From patchwork Wed Jan 31 16:26:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 769009 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (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 EEB8212BE8B; Wed, 31 Jan 2024 16:27:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706718437; cv=none; b=BRhKolaCPaRBaXbalV+LgUG0bjeGWR+7WMIer/Yc94cAFmSXH1YN+JLtkbeo1K6G87CZ+A6DmLAshk2ypKYMEJDE+ZrAXEShG0J/rxi2vwtAwWNwAfdC1g2754vkitnrQsm3ee0wuZUMk2Ki1H9meoDdZKMQYCgr6QJs1bszy+A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706718437; c=relaxed/simple; bh=YIEKqK5MI7C6wgG1cBeAfL6H69SH6ljkSO16YrF7vPc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AjHq0z+SHvcq4tCJA8EafIahFZnMMZkoBn+CkM721rnTeHyP8TuEm/OE6KpvtoNsVCrSMPt37oUIcJfgWHyCkvFTF5K8GRwcZcTqXW+erNDxlClSlpaN2Tz24e4q4u85AeIDMysjzjSwDnmDuVH/C6eiiHpGbzUYlD/MlIJvfwI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=XgxKTp/6; arc=none smtp.client-ip=217.70.183.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="XgxKTp/6" Received: by mail.gandi.net (Postfix) with ESMTPSA id 1D91E40004; Wed, 31 Jan 2024 16:27:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1706718431; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pM6whmgyRwSqq5DhU05BK7t5rD5rPlWu1apIXMRZECI=; b=XgxKTp/6votMI/aaWA0PXKpV01VKRsDH1GKKA4MGlpd9q9feMCJOq30FPZ4I7KdSr7qsh+ yrdyZByREaWdv1yUlzhJWdDQtldUbyrga1QzXBKlyuQkQd7TYhdgqOuvM4gHNh63SjZ7eU fnngriE9fJPVFkLSvFqer+VDPFAQsAzc0jIxsIGuGNEuPHacGIKjHKCDdEo1bbg4OwLwOn Q8mEuA3M7noy4C0slnj1QlYLdfG+IkaedWI3kIO+VHH93xJ3EXYYblb/QfOzDhiaedcAtc 9il6OhOPBnOMgWkPPKmtWMOkX58BAM9Lfo5V0HEvuIuqRTyWKXKrrMfJVR4K7w== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Wed, 31 Jan 2024 17:26:14 +0100 Subject: [PATCH v4 01/18] clk: fixed-factor: add optional accuracy support Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240131-mbly-clk-v4-1-bcd00510d6a0@bootlin.com> References: <20240131-mbly-clk-v4-0-bcd00510d6a0@bootlin.com> In-Reply-To: <20240131-mbly-clk-v4-0-bcd00510d6a0@bootlin.com> To: Gregory CLEMENT , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer , Linus Walleij , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Philipp Zabel Cc: Vladimir Kondratiev , linux-mips@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni , Tawfik Bayouk , linux-gpio@vger.kernel.org, =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com Fixed factor clock reports the parent clock accuracy. Add flags and acc fields to `struct clk_fixed_factor` to support setting a fixed accuracy. The default if no flag is set is not changed: use the parent clock accuracy. Signed-off-by: Théo Lebrun --- drivers/clk/clk-fixed-factor.c | 28 +++++++++++++++++++++------- include/linux/clk-provider.h | 12 +++++++++++- 2 files changed, 32 insertions(+), 8 deletions(-) diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c index b3e66202b942..bc2644a9bd7d 100644 --- a/drivers/clk/clk-fixed-factor.c +++ b/drivers/clk/clk-fixed-factor.c @@ -57,10 +57,22 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate, return 0; } +static unsigned long clk_factor_recalc_accuracy(struct clk_hw *hw, + unsigned long parent_accuracy) +{ + struct clk_fixed_factor *fix = to_clk_fixed_factor(hw); + + if (fix->flags & CLK_FIXED_FACTOR_FIXED_ACCURACY) + return fix->acc; + + return parent_accuracy; +} + const struct clk_ops clk_fixed_factor_ops = { .round_rate = clk_factor_round_rate, .set_rate = clk_factor_set_rate, .recalc_rate = clk_factor_recalc_rate, + .recalc_accuracy = clk_factor_recalc_accuracy, }; EXPORT_SYMBOL_GPL(clk_fixed_factor_ops); @@ -81,7 +93,7 @@ __clk_hw_register_fixed_factor(struct device *dev, struct device_node *np, const char *name, const char *parent_name, const struct clk_hw *parent_hw, int index, unsigned long flags, unsigned int mult, unsigned int div, - bool devm) + unsigned long acc, unsigned int fixflags, bool devm) { struct clk_fixed_factor *fix; struct clk_init_data init = { }; @@ -105,6 +117,8 @@ __clk_hw_register_fixed_factor(struct device *dev, struct device_node *np, fix->mult = mult; fix->div = div; fix->hw.init = &init; + fix->acc = acc; + fix->flags = fixflags; init.name = name; init.ops = &clk_fixed_factor_ops; @@ -152,7 +166,7 @@ struct clk_hw *devm_clk_hw_register_fixed_factor_index(struct device *dev, unsigned int mult, unsigned int div) { return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, NULL, index, - flags, mult, div, true); + flags, mult, div, 0, 0, true); } EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_index); @@ -174,7 +188,7 @@ struct clk_hw *devm_clk_hw_register_fixed_factor_parent_hw(struct device *dev, unsigned long flags, unsigned int mult, unsigned int div) { return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, parent_hw, - -1, flags, mult, div, true); + -1, flags, mult, div, 0, 0, true); } EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_parent_hw); @@ -184,7 +198,7 @@ struct clk_hw *clk_hw_register_fixed_factor_parent_hw(struct device *dev, { return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, parent_hw, -1, flags, mult, div, - false); + 0, 0, false); } EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_parent_hw); @@ -193,7 +207,7 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev, unsigned int mult, unsigned int div) { return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1, - flags, mult, div, false); + flags, mult, div, 0, 0, false); } EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor); @@ -240,7 +254,7 @@ struct clk_hw *devm_clk_hw_register_fixed_factor(struct device *dev, unsigned int mult, unsigned int div) { return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1, - flags, mult, div, true); + flags, mult, div, 0, 0, true); } EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor); @@ -267,7 +281,7 @@ static struct clk_hw *_of_fixed_factor_clk_setup(struct device_node *node) of_property_read_string(node, "clock-output-names", &clk_name); hw = __clk_hw_register_fixed_factor(NULL, node, clk_name, NULL, NULL, 0, - 0, mult, div, false); + 0, mult, div, 0, 0, false); if (IS_ERR(hw)) { /* * Clear OF_POPULATED flag so that clock registration can be diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 1293c38ddb7f..7ddc952c8c67 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -1084,18 +1084,28 @@ void of_fixed_factor_clk_setup(struct device_node *node); * @hw: handle between common and hardware-specific interfaces * @mult: multiplier * @div: divider + * @acc: fixed accuracy in ppb + * @flags: behavior modifying flags * * Clock with a fixed multiplier and divider. The output frequency is the * parent clock rate divided by div and multiplied by mult. - * Implements .recalc_rate, .set_rate and .round_rate + * Implements .recalc_rate, .set_rate, .round_rate and .recalc_accuracy + * + * Flags: + * * CLK_FIXED_FACTOR_FIXED_ACCURACY - Use the value in @acc instead of the + * parent clk accuracy. */ struct clk_fixed_factor { struct clk_hw hw; unsigned int mult; unsigned int div; + unsigned long acc; + unsigned int flags; }; +#define CLK_FIXED_FACTOR_FIXED_ACCURACY BIT(0) + #define to_clk_fixed_factor(_hw) container_of(_hw, struct clk_fixed_factor, hw) extern const struct clk_ops clk_fixed_factor_ops;