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From: =?utf-8?q?N=C3=ADcolas_F=2E_R=2E_A=2E_Prado?= <nfraprado@collabora.com>
Date: Mon, 12 Feb 2024 09:50:05 -0500
Subject: [PATCH v4 1/4] firmware: coreboot: Generate modalias uevent for
 devices
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Message-Id: <20240212-coreboot-mod-defconfig-v4-1-d14172676f6d@collabora.com>
References: <20240212-coreboot-mod-defconfig-v4-0-d14172676f6d@collabora.com>
In-Reply-To: <20240212-coreboot-mod-defconfig-v4-0-d14172676f6d@collabora.com>
To: Tzung-Bi Shih <tzungbi@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>, Brian Norris <briannorris@chromium.org>, 
 Julius Werner <jwerner@chromium.org>, 
 Masahiro Yamada <masahiroy@kernel.org>, 
 Nathan Chancellor <nathan@kernel.org>, Nicolas Schier <nicolas@fjasle.eu>, 
 Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, 
 Andy Shevchenko <andriy.shevchenko@linux.intel.com>, 
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>, kernel@collabora.com, 
 chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org, 
 linux-kbuild@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
 =?utf-8?q?N=C3=ADcolas_F=2E_R=2E_A=2E_Prado?= <nfraprado@collabora.com>

Generate a modalias uevent for devices in the coreboot bus to allow
userspace to automatically load the corresponding modules.

Acked-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 drivers/firmware/google/coreboot_table.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/firmware/google/coreboot_table.c b/drivers/firmware/google/coreboot_table.c
index 2a4469bf1b81..c1b9a9e8e8ed 100644
--- a/drivers/firmware/google/coreboot_table.c
+++ b/drivers/firmware/google/coreboot_table.c
@@ -53,11 +53,20 @@ static void coreboot_bus_remove(struct device *dev)
 		driver->remove(device);
 }
 
+static int coreboot_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
+{
+	struct coreboot_device *device = CB_DEV(dev);
+	u32 tag = device->entry.tag;
+
+	return add_uevent_var(env, "MODALIAS=coreboot:t%08X", tag);
+}
+
 static struct bus_type coreboot_bus_type = {
 	.name		= "coreboot",
 	.match		= coreboot_bus_match,
 	.probe		= coreboot_bus_probe,
 	.remove		= coreboot_bus_remove,
+	.uevent		= coreboot_bus_uevent,
 };
 
 static void coreboot_device_release(struct device *dev)

-- 
2.43.0