From patchwork Mon Mar 14 14:16:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 12780197 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 521F6C433F5 for ; Mon, 14 Mar 2022 14:17:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233040AbiCNOS3 (ORCPT ); Mon, 14 Mar 2022 10:18:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242233AbiCNOS2 (ORCPT ); Mon, 14 Mar 2022 10:18:28 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD8EC19C35 for ; Mon, 14 Mar 2022 07:17:17 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nTlVL-0004zT-8j; Mon, 14 Mar 2022 15:16:59 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1nTlVL-000f2z-Gx; Mon, 14 Mar 2022 15:16:58 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nTlVJ-0097ao-2C; Mon, 14 Mar 2022 15:16:57 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Michael Turquette , Stephen Boyd , Russell King , Matt Mackall , Herbert Xu Cc: linux-clk@vger.kernel.org, kernel@pengutronix.de, Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org Subject: [PATCH v8 05/16] hwrng: meson - Don't open-code devm_clk_get_optional_enabled() Date: Mon, 14 Mar 2022 15:16:32 +0100 Message-Id: <20220314141643.22184-6-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> References: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1735; i=uwe@kleine-koenig.org; h=from:subject; bh=bfqnxylPnbbJXe+3GBtwLYLgZPhd+qJZuw2RI3jILYE=; b=owEBbQGS/pANAwAKAcH8FHityuwJAcsmYgBiL035AdG35VtGykFXO3us1e4Qyfe85laP1NXWH96B J/ooUYmJATMEAAEKAB0WIQR+cioWkBis/z50pAvB/BR4rcrsCQUCYi9N+QAKCRDB/BR4rcrsCaXiCA CYQFfcviJ8XTZvDwlKW0nOhnqK5pTk5a0ilSqlNkH2f7pbLRUYz1rMgQTnxyx4mfi2x7jHSUvQ80ZT XrlFiSMUGotXPWPSjAUJtt/ZB9qpJIkDJquiChcWWfqfB93qxX7eOCzqjmM/C3k/uibRqKM6E2qaKK kEmkOLoBVbmGMXAlti6yjPpMx+ObbWu4w1cwFw1pLAaCuq8fgXcIjhi95Q/7JfLu+gadS6zU5a44LZ Eqie89qMyY4R8y4ZcWGjy+UHyrWlXdQ3RxglzdRGZHT3wAZb+gFSUfxq+FyiKjlwfM8XheHVut3VVz P3sPTI8D/NFV8C+7vxPxHB1zuDfQqZ X-Developer-Key: i=uwe@kleine-koenig.org; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-crypto@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org devm_clk_get_enabled() returns a clock prepared and enabled and already registers a devm exit handler to disable (and unprepare) the clock. Signed-off-by: Uwe Kleine-König Acked-by: Neil Armstrong --- drivers/char/hw_random/meson-rng.c | 20 ++------------------ 1 file changed, 2 insertions(+), 18 deletions(-) diff --git a/drivers/char/hw_random/meson-rng.c b/drivers/char/hw_random/meson-rng.c index 8bb30282ca46..06db5a93e257 100644 --- a/drivers/char/hw_random/meson-rng.c +++ b/drivers/char/hw_random/meson-rng.c @@ -33,16 +33,10 @@ static int meson_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait) return sizeof(u32); } -static void meson_rng_clk_disable(void *data) -{ - clk_disable_unprepare(data); -} - static int meson_rng_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct meson_rng_data *data; - int ret; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) @@ -54,20 +48,10 @@ static int meson_rng_probe(struct platform_device *pdev) if (IS_ERR(data->base)) return PTR_ERR(data->base); - data->core_clk = devm_clk_get_optional(dev, "core"); + data->core_clk = devm_clk_get_optional_enabled(dev, "core"); if (IS_ERR(data->core_clk)) return dev_err_probe(dev, PTR_ERR(data->core_clk), - "Failed to get core clock\n"); - - if (data->core_clk) { - ret = clk_prepare_enable(data->core_clk); - if (ret) - return ret; - ret = devm_add_action_or_reset(dev, meson_rng_clk_disable, - data->core_clk); - if (ret) - return ret; - } + "Failed to get enabled core clock\n"); data->rng.name = pdev->name; data->rng.read = meson_rng_read;