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[34.125.143.123]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c8263ff29c2sm443200a12.12.2026.05.07.13.05.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 May 2026 13:05:25 -0700 (PDT) From: "William A. Kennington III" Date: Thu, 07 May 2026 20:05:17 +0000 Subject: [PATCH v4 3/4] i2c: designware: Convert platform driver to use shutdown hook Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260507-dw-i2c-v4-3-9a447b23bfdf@wkennington.com> References: <20260507-dw-i2c-v4-0-9a447b23bfdf@wkennington.com> In-Reply-To: <20260507-dw-i2c-v4-0-9a447b23bfdf@wkennington.com> To: Mika Westerberg , Andy Shevchenko , Jan Dabros , Andi Shyti Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, "William A. Kennington III" X-Mailer: b4 0.14.3 Convert the platform driver to use the new i2c_dw_shutdown() hook, allowing the controller to gracefully NACK master requests during system shutdown. Signed-off-by: William A. Kennington III --- drivers/i2c/busses/i2c-designware-platdrv.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 3351c4a9ef11..da2babd6188b 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, -- 2.54.0.563.g4f69b47b94-goog