From: William A. Kennington III Date: Wed, 27 May 2026 20:09:51 +0000 (+0000) Subject: i2c: designware: Convert platform driver to use shutdown hook X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=0a1b80e9db9db571d48d0f8cf2a7b31270950068;p=thirdparty%2Fkernel%2Flinux.git i2c: designware: Convert platform driver to use shutdown hook Convert the platform driver to use the new i2c_dw_shutdown() hook, allowing the controller to gracefully NACK controllers requests during system shutdown. Signed-off-by: William A. Kennington III Acked-by: Mika Westerberg Signed-off-by: Andi Shyti Link: https://lore.kernel.org/r/20260527-dw-i2c-v5-3-3483057f8d67@wkennington.com --- diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 3351c4a9ef118..da2babd6188b5 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -289,9 +289,23 @@ static const struct platform_device_id dw_i2c_platform_ids[] = { }; MODULE_DEVICE_TABLE(platform, dw_i2c_platform_ids); +static void dw_i2c_plat_shutdown(struct platform_device *pdev) +{ + struct dw_i2c_dev *i_dev; + + i_dev = platform_get_drvdata(pdev); + if (!i_dev) + return; + + pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + i2c_dw_shutdown(i_dev); +} + static struct platform_driver dw_i2c_driver = { .probe = dw_i2c_plat_probe, .remove = dw_i2c_plat_remove, + .shutdown = dw_i2c_plat_shutdown, .driver = { .name = "i2c_designware", .of_match_table = dw_i2c_of_match,