From patchwork Mon Mar 27 22:21:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 13190184 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 6C5FCC761A6 for ; Mon, 27 Mar 2023 22:22:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232102AbjC0WWU (ORCPT ); Mon, 27 Mar 2023 18:22:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231932AbjC0WWM (ORCPT ); Mon, 27 Mar 2023 18:22:12 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 890EB3C1D; Mon, 27 Mar 2023 15:22:07 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0EA1561515; Mon, 27 Mar 2023 22:22:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F206CC433A7; Mon, 27 Mar 2023 22:22:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679955726; bh=6DUI1oibzpdTRpqofZSphrpkJt0K0ScGXnvCct/fcNo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=INVM4N8nPoPv3t1HXQRHcj0C8zuBvrwc4ilOUkr8ofLaNyYuSdcnf2xALZJ8uG2Yg YUzpzEgPPz1MuThuCqoV/wij9wwRadeelBxkNCOjh6RJwYiCAmHqj+jRETYW3rHSw3 rRFfJZ1W48WmBm/T7qlVDZffsyrBTzaoOZWK+paTjawuqJNZ2lr+U/GLNm39XJBseR E1Aeh8XxmAOXEREhzIKp/C0uf58vNayZWUW9S+IABdgE4A8qU7AtEHY4Z2atghHZ3d mxDh+0dn9rEYq4tLODvtSHl+3oH9Ma7yyuIi4aT7+P0Akuae7AXHwo5WCBIW811cHx 6sv4gHFWq3WkQ== From: Stephen Boyd To: Michael Turquette , Stephen Boyd Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, patches@lists.linux.dev, Brendan Higgins , David Gow , Greg Kroah-Hartman , "Rafael J . Wysocki" , Rob Herring , Frank Rowand , Christian Marangi , Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, Maxime Ripard Subject: [PATCH v3 08/11] clk: Add test managed clk provider/consumer APIs Date: Mon, 27 Mar 2023 15:21:56 -0700 Message-Id: <20230327222159.3509818-9-sboyd@kernel.org> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog In-Reply-To: <20230327222159.3509818-1-sboyd@kernel.org> References: <20230327222159.3509818-1-sboyd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Unit tests are more ergonomic and simpler to understand if they don't have to hoist a bunch of code into the test harness init and exit functions. Add some test managed wrappers for the clk APIs so that clk unit tests can write more code in the actual test and less code in the harness. Only add APIs that are used for now. More wrappers can be added in the future as necessary. Cc: Brendan Higgins Cc: David Gow Signed-off-by: Stephen Boyd --- Documentation/dev-tools/kunit/api/clk.rst | 10 + Documentation/dev-tools/kunit/api/index.rst | 5 + drivers/clk/Makefile | 5 + drivers/clk/clk_kunit.c | 224 ++++++++++++++++++++ include/kunit/clk.h | 28 +++ 5 files changed, 272 insertions(+) create mode 100644 Documentation/dev-tools/kunit/api/clk.rst create mode 100644 drivers/clk/clk_kunit.c create mode 100644 include/kunit/clk.h diff --git a/Documentation/dev-tools/kunit/api/clk.rst b/Documentation/dev-tools/kunit/api/clk.rst new file mode 100644 index 000000000000..badd87a35f9e --- /dev/null +++ b/Documentation/dev-tools/kunit/api/clk.rst @@ -0,0 +1,10 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======== +Clk API +======== + +The KUnit clk API is used to test clk providers and clk consumers. + +.. kernel-doc:: drivers/clk/clk_kunit.c + :export: diff --git a/Documentation/dev-tools/kunit/api/index.rst b/Documentation/dev-tools/kunit/api/index.rst index eb628cb2c72a..cbde5f8d40e2 100644 --- a/Documentation/dev-tools/kunit/api/index.rst +++ b/Documentation/dev-tools/kunit/api/index.rst @@ -9,6 +9,7 @@ API Reference test resource functionredirection + clk of platformdevice @@ -34,6 +35,10 @@ Documentation/dev-tools/kunit/api/functionredirection.rst Driver KUnit API ================ +Documentation/dev-tools/kunit/api/clk.rst + + - Documents the KUnit clk API + Documentation/dev-tools/kunit/api/of.rst - Documents the KUnit device tree (OF) API diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index e3ca0d058a25..226b4b729703 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -17,6 +17,11 @@ ifeq ($(CONFIG_OF), y) obj-$(CONFIG_COMMON_CLK) += clk-conf.o endif +# KUnit specific helpers +ifeq ($(CONFIG_COMMON_CLK), y) +obj-$(CONFIG_KUNIT) += clk_kunit.o +endif + # hardware specific clock types # please keep this section sorted lexicographically by file path name obj-$(CONFIG_COMMON_CLK_APPLE_NCO) += clk-apple-nco.o diff --git a/drivers/clk/clk_kunit.c b/drivers/clk/clk_kunit.c new file mode 100644 index 000000000000..bb9bf5a2617f --- /dev/null +++ b/drivers/clk/clk_kunit.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit helpers for clk providers and consumers + */ +#include +#include +#include +#include +#include + +#include +#include + +static void clk_disable_unprepare_kunit(struct kunit_resource *res) +{ + struct clk *clk = res->data; + + clk_disable_unprepare(clk); +} + +/** + * clk_prepare_enable_kunit() - Test managed clk_prepare_enable() + * @test: The test context + * @clk: clk to prepare and enable + * + * Returns: 0 on success, or negative errno on failure. + */ +int clk_prepare_enable_kunit(struct kunit *test, struct clk *clk) +{ + if (!kunit_alloc_resource(test, NULL, clk_disable_unprepare_kunit, + GFP_KERNEL, clk)) + return -EINVAL; + + return clk_prepare_enable(clk); +} +EXPORT_SYMBOL_GPL(clk_prepare_enable_kunit); + +static void clk_put_kunit(struct kunit_resource *res) +{ + struct clk *clk = res->data; + + clk_put(clk); +} + +static struct clk *__clk_get_kunit(struct kunit *test, struct clk *clk) +{ + if (IS_ERR(clk)) + return clk; + + if (!kunit_alloc_resource(test, NULL, clk_put_kunit, GFP_KERNEL, clk)) { + clk_put(clk); + return ERR_PTR(-EINVAL); + } + + return clk; +} + +/** + * clk_get_kunit() - Test managed clk_get() + * @test: The test context + * @dev: device for clock "consumer" + * @con_id: clock consumer ID + * + * Just like clk_get(), except the clk is managed by the test case and is + * automatically put with clk_put() after the test case concludes. + * + * Returns: new clk consumer or ERR_PTR on failure. + */ +struct clk * +clk_get_kunit(struct kunit *test, struct device *dev, const char *con_id) +{ + struct clk *clk; + + clk = clk_get(dev, con_id); + + return __clk_get_kunit(test, clk); +} +EXPORT_SYMBOL_GPL(clk_get_kunit); + +/** + * of_clk_get_kunit() - Test managed of_clk_get() + * @test: The test context + * @np: device_node for clock "consumer" + * @index: index in 'clocks' property of @np + * + * Just like of_clk_get(), except the clk is managed by the test case and is + * automatically put with clk_put() after the test case concludes. + * + * Returns: new clk consumer or ERR_PTR on failure. + */ +struct clk * +of_clk_get_kunit(struct kunit *test, struct device_node *np, int index) +{ + struct clk *clk; + + clk = of_clk_get(np, index); + + return __clk_get_kunit(test, clk); +} +EXPORT_SYMBOL_GPL(of_clk_get_kunit); + +/** + * clk_hw_get_clk_kunit() - Test managed clk_hw_get_clk() + * @test: The test context + * @hw: clk_hw associated with the clk being consumed + * @con_id: connection ID string on device + * + * Just like clk_hw_get_clk(), except the clk is managed by the test case and + * is automatically put with clk_put() after the test case concludes. + * + * Returns: new clk consumer or ERR_PTR on failure. + */ +struct clk * +clk_hw_get_clk_kunit(struct kunit *test, struct clk_hw *hw, const char *con_id) +{ + struct clk *clk; + + clk = clk_hw_get_clk(hw, con_id); + + return __clk_get_kunit(test, clk); +} +EXPORT_SYMBOL_GPL(clk_hw_get_clk_kunit); + +/** + * clk_hw_get_clk_prepared_enabled_kunit() - Test managed clk_hw_get_clk() + clk_prepare_enable() + * @test: The test context + * @hw: clk_hw associated with the clk being consumed + * @con_id: connection ID string on device + * + * Just like + * + * .. code-block:: c + * + * struct clk *clk = clk_hw_get_clk(...); + * clk_prepare_enable(clk); + * + * except the clk is managed by the test case and is automatically disabled and + * unprepared with clk_disable_unprepare() and put with clk_put() after the + * test case concludes. + * + * Returns: new clk consumer that is prepared and enabled or ERR_PTR on failure. + */ +struct clk * +clk_hw_get_clk_prepared_enabled_kunit(struct kunit *test, struct clk_hw *hw, + const char *con_id) +{ + int ret; + struct clk *clk; + + clk = clk_hw_get_clk_kunit(test, hw, con_id); + if (IS_ERR(clk)) + return clk; + + ret = clk_prepare_enable_kunit(test, clk); + if (ret) + return ERR_PTR(ret); + + return clk; +} +EXPORT_SYMBOL_GPL(clk_hw_get_clk_prepared_enabled_kunit); + +static void clk_hw_unregister_kunit(struct kunit_resource *res) +{ + struct clk_hw *hw = res->data; + + clk_hw_unregister(hw); +} + +static int __clk_hw_register_kunit(struct kunit *test, struct clk_hw *hw) +{ + if (!kunit_alloc_resource(test, NULL, clk_hw_unregister_kunit, GFP_KERNEL, hw)) { + clk_hw_unregister(hw); + return -EINVAL; + } + + return 0; +} + +/** + * clk_hw_register_kunit() - Test managed clk_hw_register() + * @test: The test context + * @dev: device that is registering this clock + * @hw: link to hardware-specific clock data + * + * Just like clk_hw_register(), except the clk registration is managed by the + * test case and is automatically unregistered after the test case concludes. + * + * Returns: 0 on success or a negative errno value on failure. + */ +int clk_hw_register_kunit(struct kunit *test, struct device *dev, struct clk_hw *hw) +{ + int ret; + + ret = clk_hw_register(dev, hw); + if (ret) + return ret; + + return __clk_hw_register_kunit(test, hw); +} +EXPORT_SYMBOL_GPL(clk_hw_register_kunit); + +/** + * of_clk_hw_register_kunit() - Test managed of_clk_hw_register() + * @test: The test context + * @node: device_node of device that is registering this clock + * @hw: link to hardware-specific clock data + * + * Just like of_clk_hw_register(), except the clk registration is managed by + * the test case and is automatically unregistered after the test case + * concludes. + * + * Returns: 0 on success or a negative errno value on failure. + */ +int of_clk_hw_register_kunit(struct kunit *test, struct device_node *node, struct clk_hw *hw) +{ + int ret; + + ret = of_clk_hw_register(node, hw); + if (ret) + return ret; + + return __clk_hw_register_kunit(test, hw); +} +EXPORT_SYMBOL_GPL(of_clk_hw_register_kunit); diff --git a/include/kunit/clk.h b/include/kunit/clk.h new file mode 100644 index 000000000000..73bc99cefe7b --- /dev/null +++ b/include/kunit/clk.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _CLK_KUNIT_H +#define _CLK_KUNIT_H + +struct clk; +struct clk_hw; +struct device; +struct device_node; +struct kunit; + +struct clk * +clk_get_kunit(struct kunit *test, struct device *dev, const char *con_id); +struct clk * +of_clk_get_kunit(struct kunit *test, struct device_node *np, int index); + +struct clk * +clk_hw_get_clk_kunit(struct kunit *test, struct clk_hw *hw, const char *con_id); +struct clk * +clk_hw_get_clk_prepared_enabled_kunit(struct kunit *test, struct clk_hw *hw, + const char *con_id); + +int clk_prepare_enable_kunit(struct kunit *test, struct clk *clk); + +int clk_hw_register_kunit(struct kunit *test, struct device *dev, struct clk_hw *hw); +int of_clk_hw_register_kunit(struct kunit *test, struct device_node *node, + struct clk_hw *hw); + +#endif