From patchwork Sat Oct 19 11:16:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Ciocaltea X-Patchwork-Id: 13842686 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 180E2D3C909 for ; Sat, 19 Oct 2024 11:18:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dVT8i1JSnCmQJwplJOECZQJbeebSgkLQZ287mFuK2Ic=; b=E2LwJMZrR+DwVRQ4GeNq/Gyvva 0aMpz/dtwymCcbsgeM8izZWBfYgApZyrp7c2zgEuPIDIfG7rRFugwx6tVC4n5jZgXLIni3TqMEYt9 cqp4s1ByTlvlKEitKBn1FJ05bBSSHIGvoxpXEotyMQNHVDGGkDEAlwFyOE5ph6b5zLW2O/GowIROv gwG2PmJi8OEeIcMr0/Q5Qv8J6Fo+IibOPPXSu0oWbbPtuABzVmw1ANIw+qrdMVKN8DQZeUyoK9Sww R2G8EKMkAJLATr3dymLoeXJmHKrCtxVxNM+Yh7tuTIYLRKawHb1QKo7lE+AbBjue9o3zrR3YUkd8z dCP7q6ag==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t27St-00000003C2a-2saE; Sat, 19 Oct 2024 11:17:47 +0000 Received: from bali.collaboradmins.com ([148.251.105.195]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t27RO-00000003BV4-1gx3; Sat, 19 Oct 2024 11:16:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1729336572; bh=liu6AH5wskPRdG1LJazp0t8ejwo/RTs1GpUY5J41pVw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=qVU66crBEtIarbBDM6UIaDebVYjVUIqq9OgLgGDj/8Plf7LeI/V/sFpOGlKHsdhph 5ZZYcIUQD8ImZqmXdLA3Uyyz5A9ifyoQUXHvNz3KQiZxB4kReTVC/2+OiyTZlvR77O cQ8xAZRL2dFGwrzDlTQvPpu/aEnGQvg8sYFCfZIcslV8FCJyD5UGMe+G1YpdKXINCQ aeNuUo4mr/DHSmje3jF2qm8scIs3dBfWutk5aTjGkaqGYNTcQvwb9He/TzdF9zPUvk bZYFBJcD/znLVQxZMtcP9szYy7cxKI0bPwaeTl7zUGlann8CCS/xylJdgPozDzxAdp vXBh9Ea7uMeyQ== Received: from localhost (unknown [188.24.146.62]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by bali.collaboradmins.com (Postfix) with ESMTPSA id 699C017E35CB; Sat, 19 Oct 2024 13:16:12 +0200 (CEST) From: Cristian Ciocaltea Date: Sat, 19 Oct 2024 14:16:00 +0300 Subject: [PATCH v4 1/4] clk: Provide devm_clk_bulk_get_all_enabled() helper MIME-Version: 1.0 Message-Id: <20241019-clk_bulk_ena_fix-v4-1-57f108f64e70@collabora.com> References: <20241019-clk_bulk_ena_fix-v4-0-57f108f64e70@collabora.com> In-Reply-To: <20241019-clk_bulk_ena_fix-v4-0-57f108f64e70@collabora.com> To: Michael Turquette , Stephen Boyd , Russell King , Matthias Brugger , AngeloGioacchino Del Regno , Jingoo Han , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Krzysztof Kozlowski , Alim Akhtar Cc: kernel@collabora.com, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-pci@vger.kernel.org, linux-samsung-soc@vger.kernel.org X-Mailer: b4 0.14.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241019_041614_629772_8A92246E X-CRM114-Status: GOOD ( 18.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Commit 265b07df758a ("clk: Provide managed helper to get and enable bulk clocks") added devm_clk_bulk_get_all_enable() function, but missed to return the number of clocks stored in the clk_bulk_data table referenced by the clks argument. Without knowing the number, it's not possible to iterate these clocks when needed, hence the argument is useless and could have been simply removed. Introduce devm_clk_bulk_get_all_enabled() variant, which is consistent with devm_clk_bulk_get_all() in terms of the returned value: > 0 if one or more clocks have been stored = 0 if there are no clocks < 0 if an error occurred Moreover, the naming is consistent with devm_clk_get_enabled(), i.e. use the past form of 'enable'. To reduce code duplication and improve patch readability, make devm_clk_bulk_get_all_enable() use the new helper, as suggested by Stephen Boyd. Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Manivannan Sadhasivam Signed-off-by: Cristian Ciocaltea --- drivers/clk/clk-devres.c | 28 +++++++++++++++++++--------- include/linux/clk.h | 24 ++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 9 deletions(-) diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c index 82ae1f26e634572b943d18b8d86267f0a69911a6..975fac29b27f3709e292531a114975c9108287db 100644 --- a/drivers/clk/clk-devres.c +++ b/drivers/clk/clk-devres.c @@ -220,6 +220,15 @@ static void devm_clk_bulk_release_all_enable(struct device *dev, void *res) int __must_check devm_clk_bulk_get_all_enable(struct device *dev, struct clk_bulk_data **clks) +{ + int ret = devm_clk_bulk_get_all_enabled(dev, clks); + + return ret > 0 ? 0 : ret; +} +EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all_enable); + +int __must_check devm_clk_bulk_get_all_enabled(struct device *dev, + struct clk_bulk_data **clks) { struct clk_bulk_devres *devres; int ret; @@ -230,25 +239,26 @@ int __must_check devm_clk_bulk_get_all_enable(struct device *dev, return -ENOMEM; ret = clk_bulk_get_all(dev, &devres->clks); - if (ret > 0) { - *clks = devres->clks; - devres->num_clks = ret; - } else { + if (ret <= 0) { devres_free(devres); return ret; } + *clks = devres->clks; + devres->num_clks = ret; + ret = clk_bulk_prepare_enable(devres->num_clks, *clks); - if (!ret) { - devres_add(dev, devres); - } else { + if (ret) { clk_bulk_put_all(devres->num_clks, devres->clks); devres_free(devres); + return ret; } - return ret; + devres_add(dev, devres); + + return devres->num_clks; } -EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all_enable); +EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all_enabled); static int devm_clk_match(struct device *dev, void *res, void *data) { diff --git a/include/linux/clk.h b/include/linux/clk.h index 851a0f2cf42c8c1bbada49d991bc185587942155..158c5072852e36c1583dc47ca7516fcdd928fe59 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -511,6 +511,24 @@ int __must_check devm_clk_bulk_get_all(struct device *dev, int __must_check devm_clk_bulk_get_all_enable(struct device *dev, struct clk_bulk_data **clks); +/** + * devm_clk_bulk_get_all_enabled - Get and enable all clocks of the consumer (managed) + * @dev: device for clock "consumer" + * @clks: pointer to the clk_bulk_data table of consumer + * + * Returns a positive value for the number of clocks obtained while the + * clock references are stored in the clk_bulk_data table in @clks field. + * Returns 0 if there're none and a negative value if something failed. + * + * This helper function allows drivers to get all clocks of the + * consumer and enables them in one operation with management. + * The clks will automatically be disabled and freed when the device + * is unbound. + */ + +int __must_check devm_clk_bulk_get_all_enabled(struct device *dev, + struct clk_bulk_data **clks); + /** * devm_clk_get - lookup and obtain a managed reference to a clock producer. * @dev: device for clock "consumer" @@ -1040,6 +1058,12 @@ static inline int __must_check devm_clk_bulk_get_all_enable(struct device *dev, return 0; } +static inline int __must_check devm_clk_bulk_get_all_enabled(struct device *dev, + struct clk_bulk_data **clks) +{ + return 0; +} + static inline struct clk *devm_get_clk_from_child(struct device *dev, struct device_node *np, const char *con_id) {