From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.54 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794583963; b=bA30Ytp8nqzMhKJx7nObYblxSZ+mmGqzvq/7oK0IHb0B4x62WMRG5Q0gVUsIrW8CI29E lEuu+MVBff1LzBuOnPLk/rpAzhCEbPsikeux/ncs+Xgw4A2oggPXoscX56u5GGn3mAT7d 7ikRQuu2j8YS7kdkKiNKRS9YWOzXZrZAQfYnu0GvEzO7eicyDcGLNhSUyScVpfZl5SUL3 Jb7jnubqxYGNqoj8DhcfDvFnkEJGkFH4v+E17LU+E4hURg/pxIDYdvXqqf6KLSVmtPCcj xLi2hUr4/RwfqtZAg0HaZEgP/SbWY4ax0WX2ahliVA0c9rfX6p6ysfsEKI6Q2wvLzJQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794583963; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:Date:Subject:MIME-Version: Content-Type:Content-Transfer-Encoding:Message-Id:References: In-Reply-To:To:Cc:X-Mailer; bh=bvNkvOXezmjuj2NgjEjXOIyrbEQDPQ7zXLJoZzuvJso=; b=RZvpLKvi359DdrbUuVIBY4mjIENNUeySum2tKvdUHeEyotN42TH+clTO5BmzsG+TFdZr 8FnWor9/PXxHRGU08PB+B6bJqQF1lnx8jJVPzifkB92OXUPjh8MHBWVz15ZQxuLfZs/y1 b48WywjxXNT/eDFHy9tmvplOW881QlOy9qUKKckyTOjWA8gnZkkZXoYO6Ms3KpJO42pHs Rj9OYe8tYHr/x/qIEFl0f00OaCeNkeUfXnRa/cTXK+Y21Yl8P0u1iUEGMLhGauFycPPim fBYS3Vd5/gIQawevQno0DWKHrNtYKHW9muqN1LvixsSq1CEyOA1ZMPHNxGtwYjnUV8w== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=AT5iCnu+; arc=none smtp.remote-ip=95.215.58.54 Received: from mta1.migadu.com (out-54.mta1.migadu.com [95.215.58.54]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 34E4360A2624 for ; Fri, 13 Nov 2026 15:32:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 34E4360A2624 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=AT5iCnu+ X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=gpudrF8e9c8S7xz2PdaClPQ2oeR8iHtL9/29e7yY5nY=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794583961; v=1; x=1795188761; b=AT5iCnu+EUFIex5E6ZgqZgAL7F13A2TiathRoRxPPgyAc7HkTnqzzw1bjrUgO9TocyFQ1w9W C1UTIl5q4YNrDbzAdp49awAbZ50kPd7HqZP5a4/G0DuaHloMmC0LFjU+GPwfnqY8xRMVqaVvzUd Iu+THOfJdvNuaoz1cTc6oJq8= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 7cac1438b6c61d50; Fri, 13 Nov 2026 15:32:41 +0000 X-Mizu-Trace-ID: 7cac1438b6c61d50 X-Migadu-Flow: FLOW_OUT From: Peng Fan Date: Fri, 13 Nov 2026 23:31:58 +0800 Subject: [PATCH v2 10/10] regmap: kunit: add test for regmap_bus::init_limits X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261113-regmap-improve-v2-10-5dfd6a89078f@nxp.com> References: <20261113-regmap-improve-v2-0-5dfd6a89078f@nxp.com> In-Reply-To: <20261113-regmap-improve-v2-0-5dfd6a89078f@nxp.com> To: Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Johan Hovold , Lucas Tanure Cc: linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, Peng Fan X-Mailer: b4 0.14.3 From: Peng Fan Add coverage for the optional regmap_bus::init_limits() callback. The test bus lowers the raw I/O limits and relies on raw register defaults so that regcache_hw_init() reads from the device during map initialization. The readback must be split according to the limits set by the callback, which also verifies that __regmap_init() invokes the callback before regcache_init(). Signed-off-by: Peng Fan --- drivers/base/regmap/regmap-kunit.c | 89 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c index c948219f46a3..f2fe2eef3403 100644 --- a/drivers/base/regmap/regmap-kunit.c +++ b/drivers/base/regmap/regmap-kunit.c @@ -2247,6 +2247,94 @@ static void raw_ranges(struct kunit *test) } } +#define TEST_INIT_LIMITS_REGS 16 +#define TEST_INIT_LIMITS_MAX_RAW 4 + +struct test_init_limits_data { + int num_reads; + size_t read_sizes[TEST_INIT_LIMITS_REGS]; +}; + +static void test_init_limits_bus_init_limits(struct regmap *map, + const struct regmap_config *config) +{ + map->max_raw_read = TEST_INIT_LIMITS_MAX_RAW; + map->max_raw_write = TEST_INIT_LIMITS_MAX_RAW; +} + +static int test_init_limits_bus_read(void *context, const void *reg_buf, + size_t reg_size, void *val_buf, + size_t val_size) +{ + struct test_init_limits_data *data = context; + + if (data->num_reads < ARRAY_SIZE(data->read_sizes)) + data->read_sizes[data->num_reads] = val_size; + data->num_reads++; + + memset(val_buf, 0, val_size); + + return 0; +} + +static int test_init_limits_bus_write(void *context, const void *data, + size_t count) +{ + return 0; +} + +static const struct regmap_bus test_init_limits_bus = { + .read = test_init_limits_bus_read, + .write = test_init_limits_bus_write, + .init_limits = test_init_limits_bus_init_limits, +}; + +static const struct regmap_config test_init_limits_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = TEST_INIT_LIMITS_REGS - 1, + .cache_type = REGCACHE_FLAT, + .num_reg_defaults_raw = TEST_INIT_LIMITS_REGS, +}; + +static void test_init_limits(struct kunit *test) +{ + struct regmap_test_priv *priv = test->priv; + struct test_init_limits_data *data; + struct regmap *map; + int i, ret; + + data = kunit_kzalloc(test, sizeof(*data), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, data); + + map = regmap_init(priv->dev, &test_init_limits_bus, data, + &test_init_limits_config); + KUNIT_ASSERT_FALSE(test, IS_ERR(map)); + if (IS_ERR(map)) + return; + + ret = kunit_add_action_or_reset(test, regmap_exit_action, map); + KUNIT_ASSERT_EQ(test, 0, ret); + if (ret) + return; + + KUNIT_EXPECT_EQ(test, (size_t)TEST_INIT_LIMITS_MAX_RAW, + regmap_get_raw_read_max(map)); + KUNIT_EXPECT_EQ(test, (size_t)TEST_INIT_LIMITS_MAX_RAW, + regmap_get_raw_write_max(map)); + + /* + * regcache_hw_init() reads raw defaults during map initialization, + * so the callback must already have set the limit which chunks the + * readback. + */ + KUNIT_ASSERT_EQ(test, TEST_INIT_LIMITS_REGS / TEST_INIT_LIMITS_MAX_RAW, + data->num_reads); + for (i = 0; i < data->num_reads; i++) + KUNIT_EXPECT_EQ(test, (size_t)TEST_INIT_LIMITS_MAX_RAW, + data->read_sizes[i]); +} + static struct kunit_case regmap_test_cases[] = { KUNIT_CASE_PARAM(basic_read_write, regcache_types_gen_params), KUNIT_CASE_PARAM(read_bypassed, real_cache_types_gen_params), @@ -2290,6 +2378,7 @@ static struct kunit_case regmap_test_cases[] = { KUNIT_CASE_PARAM(raw_noinc_write, raw_test_types_gen_params), KUNIT_CASE_PARAM(raw_sync, raw_test_cache_types_gen_params), KUNIT_CASE_PARAM(raw_ranges, raw_test_cache_types_gen_params), + KUNIT_CASE(test_init_limits), {} }; -- 2.56.0