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Mon, 07 Jul 2025 16:46:41 -0700 (PDT) From: Laurentiu Mihalcea To: Shawn Guo , Catalin Marinas , Will Deacon , Sascha Hauer , Alexander Stein , Mark Brown , Fabio Estevam Cc: Pengutronix Kernel Team , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev Subject: [PATCH 1/2] bus: imx-aipstz: allow creating pdevs for child buses Date: Mon, 7 Jul 2025 19:46:27 -0400 Message-Id: <20250707234628.164151-2-laurentiumihalcea111@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250707234628.164151-1-laurentiumihalcea111@gmail.com> References: <20250707234628.164151-1-laurentiumihalcea111@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Laurentiu Mihalcea devm_of_platform_populate() passes a NULL as the bus OF match table to the underlying of_platform_populate(), meaning child bus devices of the AIPSTZ bridge will not have its children devices created. Since some SoCs (e.g. i.MX8MP) use this particular setup (e.g. SPBA bus, which is a child of AIPSTZ5 and has multiple child nodes), the driver needs to support it. Therefore, replace devm_of_platform_populate() with of_platform_populate() and pass a reference to the bus OF match table to it. For now, the only possible child buses are simple buses. Since the usage of devres is dropped, the complementary operation of of_platform_populate() needs to be called during the driver's removal. Signed-off-by: Laurentiu Mihalcea Fixes: 796cba2dd4d9 ("bus: add driver for IMX AIPSTZ bridge") Reported-by: Alexander Stein Closes: https://lore.kernel.org/lkml/5029548.31r3eYUQgx@steina-w/#t Tested-by: Alexander Stein --- drivers/bus/imx-aipstz.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/bus/imx-aipstz.c b/drivers/bus/imx-aipstz.c index 6610251f41c7..5fdf377f5d06 100644 --- a/drivers/bus/imx-aipstz.c +++ b/drivers/bus/imx-aipstz.c @@ -26,6 +26,11 @@ static void imx_aipstz_apply_default(struct imx_aipstz_d= ata *data) writel(data->default_cfg->mpr0, data->base + IMX_AIPSTZ_MPR0); } =20 +static const struct of_device_id imx_aipstz_match_table[] =3D { + { .compatible =3D "simple-bus", }, + { } +}; + static int imx_aipstz_probe(struct platform_device *pdev) { struct imx_aipstz_data *data; @@ -49,7 +54,13 @@ static int imx_aipstz_probe(struct platform_device *pdev) pm_runtime_set_active(&pdev->dev); devm_pm_runtime_enable(&pdev->dev); =20 - return devm_of_platform_populate(&pdev->dev); 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Mon, 07 Jul 2025 16:46:45 -0700 (PDT) Received: from playground.localdomain ([82.79.237.69]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ae3f66d1ae3sm781539266b.7.2025.07.07.16.46.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Jul 2025 16:46:44 -0700 (PDT) From: Laurentiu Mihalcea To: Shawn Guo , Catalin Marinas , Will Deacon , Sascha Hauer , Alexander Stein , Mark Brown , Fabio Estevam Cc: Pengutronix Kernel Team , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev Subject: [PATCH 2/2] arm64: defconfig: enable i.MX AIPSTZ driver Date: Mon, 7 Jul 2025 19:46:28 -0400 Message-Id: <20250707234628.164151-3-laurentiumihalcea111@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250707234628.164151-1-laurentiumihalcea111@gmail.com> References: <20250707234628.164151-1-laurentiumihalcea111@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Laurentiu Mihalcea Enable the config (CONFIG_IMX_AIPSTZ) for the i.MX AIPSTZ driver, which is required for platforms using the AIPSTZ bridge (e.g. i.MX8MP). Signed-off-by: Laurentiu Mihalcea --- arch/arm64/configs/defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 739b19302865..4d7a60444bf5 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -262,6 +262,7 @@ CONFIG_GOOGLE_FIRMWARE=3Dy CONFIG_GOOGLE_CBMEM=3Dm CONFIG_GOOGLE_COREBOOT_TABLE=3Dm CONFIG_EFI_CAPSULE_LOADER=3Dy +CONFIG_IMX_AIPSTZ=3Dy CONFIG_IMX_SCU=3Dy CONFIG_QCOM_TZMEM_MODE_SHMBRIDGE=3Dy CONFIG_QCOM_QSEECOM=3Dy --=20 2.34.1