linux-kernel - [PATCH 2/2] platform/x86: simatic-ipc: add auto-loading of hwmon modules

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Date:   Tue, 11 Jul 2023 14:08:42 +0200
From:   Henning Schild <henning.schild@...mens.com>
To:     Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        <platform-driver-x86@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Tobias Schaffner <tobias.schaffner@...mens.com>,
        Gerd Haeussler <gerd.haeussler.ext@...mens.com>,
        Henning Schild <henning.schild@...mens.com>
Subject: [PATCH 2/2] platform/x86: simatic-ipc: add auto-loading of hwmon modules

In order to know which hwmon modules to load one would have to usually
first probe from user-land i.e. with sensors-detect and create a config
for each machine. But here we know exactly what machines we are dealing
with, so we can request those howmon modules without user-mode detection
and config files.

Signed-off-by: Henning Schild <henning.schild@...mens.com>
---
 drivers/platform/x86/simatic-ipc.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/platform/x86/simatic-ipc.c b/drivers/platform/x86/simatic-ipc.c
index 71487216d33f..403dc231bef7 100644
--- a/drivers/platform/x86/simatic-ipc.c
+++ b/drivers/platform/x86/simatic-ipc.c
@@ -153,6 +153,21 @@ static int register_platform_devices(u32 station_id)
 	return 0;
 }
 
+static void request_additional_modules(u32 station_id)
+{
+	switch (station_id) {
+	case SIMATIC_IPC_IPC227G:
+	case SIMATIC_IPC_IPC277G:
+	case SIMATIC_IPC_IPCBX_39A:
+	case SIMATIC_IPC_IPCPX_39A:
+		request_module("nct6775");
+		break;
+	default:
+		request_module("emc1403");
+		break;
+	}
+}
+
 static int __init simatic_ipc_init_module(void)
 {
 	const struct dmi_system_id *match;
@@ -170,6 +185,8 @@ static int __init simatic_ipc_init_module(void)
 		return 0;
 	}
 
+	request_additional_modules(station_id);
+
 	return register_platform_devices(station_id);
 }
 
-- 
2.41.0