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[73.183.52.120]) by smtp.gmail.com with ESMTPSA id af79cd13be357-84f2f6f3c25sm230272985a.49.2025.09.23.07.40.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Sep 2025 07:40:11 -0700 (PDT) From: Brian Masney Date: Tue, 23 Sep 2025 10:39:27 -0400 Subject: [PATCH RFC v4 08/12] clk: test: introduce test variation for sibling rate changes on a mux Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250923-clk-tests-docs-v4-8-9205cb3d3cba@redhat.com> References: <20250923-clk-tests-docs-v4-0-9205cb3d3cba@redhat.com> In-Reply-To: <20250923-clk-tests-docs-v4-0-9205cb3d3cba@redhat.com> To: Michael Turquette , Stephen Boyd , Maxime Ripard , Jonathan Corbet , Russell King Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Brian Masney X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2549; i=bmasney@redhat.com; s=20250903; h=from:subject:message-id; bh=Q4FysjLwmisDNtR/Tyh/L+zp4+LEXH1XuUq81ZlHyiA=; b=owGbwMvMwCW2/dJd9di6A+2Mp9WSGDIubTR4svCbnaRe5RUGyR8OPzdxRmdP4VxQ18a24lZaf I5+06zDHaUsDGJcDLJiiixLco0KIlJX2d67o8kCM4eVCWQIAxenAEwkrZuRYfO2iu/hbyb0XTlo tejBw8MuZVF/Y3tYTum8PHeu3+nsMnOGf7YnXzAUm1WWCu+dyqlh9OvDzOCb3j/uZrguz7jm/7f +HCsA X-Developer-Key: i=bmasney@redhat.com; a=openpgp; fpr=A46D32705865AA3DDEDC2904B7D2DD275D7EC087 Introduce a test variation that creates a parent with two children: a divider and a mux. Ensure that changing the rate of the divider does not affect the rate of the mux. Signed-off-by: Brian Masney --- drivers/clk/clk_test.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c index a330de8bd8dc2cdda558d364a3c6d87a26791c8d..0344f3f62251728e15af277ea0d= 143dc1f40fd94 100644 --- a/drivers/clk/clk_test.c +++ b/drivers/clk/clk_test.c @@ -908,6 +908,47 @@ clk_rate_change_sibling_div_gate_test_init(struct kuni= t *test) return &ctx->clk_ctx; } =20 +struct clk_rate_change_sibling_div_mux_sibling_context { + struct clk_dummy_div child1; + struct clk_multiple_parent_ctx child2_mux; + struct clk_test_rate_change_sibling_clk_ctx clk_ctx; +}; + +static struct clk_test_rate_change_sibling_clk_ctx * +clk_rate_change_sibling_div_mux_test_init(struct kunit *test) +{ + struct clk_rate_change_sibling_div_mux_sibling_context *ctx; + int ret; + + ctx =3D kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return ERR_PTR(-ENOMEM); + test->priv =3D ctx; + + ret =3D clk_init_multiple_parent_ctx(test, &ctx->child2_mux, + "parent0", 24 * HZ_PER_MHZ, + "parent1", 48 * HZ_PER_MHZ, + "child2", CLK_SET_RATE_NO_REPARENT, + &clk_multiple_parents_mux_ops); + if (ret) + return ERR_PTR(ret); + + ctx->child1.hw.init =3D CLK_HW_INIT_HW("child1", &ctx->child2_mux.parents= _ctx[0].hw, + &clk_dummy_div_ops, CLK_SET_RATE_PARENT); + ctx->child1.div =3D 1; + ret =3D clk_hw_register_kunit(test, NULL, &ctx->child1.hw); + if (ret) + return ERR_PTR(ret); + + KUNIT_ASSERT_EQ(test, ret, 0); + + ctx->clk_ctx.parent_clk =3D clk_hw_get_clk(&ctx->child2_mux.parents_ctx[0= ].hw, NULL); + ctx->clk_ctx.child1_clk =3D clk_hw_get_clk(&ctx->child1.hw, NULL); + ctx->clk_ctx.child2_clk =3D clk_hw_get_clk(&ctx->child2_mux.hw, NULL); + + return &ctx->clk_ctx; +} + struct clk_test_rate_change_sibling_test_case { const char *desc; struct clk_test_rate_change_sibling_clk_ctx *(*init)(struct kunit *test); @@ -918,6 +959,10 @@ static struct clk_test_rate_change_sibling_test_case c= lk_test_rate_change_siblin .desc =3D "div_gate", .init =3D clk_rate_change_sibling_div_gate_test_init, }, + { + .desc =3D "div_mux", + .init =3D clk_rate_change_sibling_div_mux_test_init, + }, }; =20 KUNIT_ARRAY_PARAM_DESC(clk_test_rate_change_sibling_test_case, --=20 2.51.0