linux-kernel - [PATCH 2/2] mux: gpio: add support for ADG1712 quad SPST switch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251121115750.20119-3-antoniu.miclaus@analog.com>
Date: Fri, 21 Nov 2025 11:57:32 +0000
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: Peter Rosin <peda@...ntia.se>, Rob Herring <robh@...nel.org>,
        Krzysztof
 Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Linus
 Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Srinivas Kandagatla <srini@...nel.org>,
        Antoniu Miclaus
	<antoniu.miclaus@...log.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        David
 Lechner <dlechner@...libre.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>
Subject: [PATCH 2/2] mux: gpio: add support for ADG1712 quad SPST switch

Add support for the Analog Devices ADG1712 quad single-pole/
single-throw (SPST) switch to the existing GPIO multiplexer driver.

The existing gpio-mux driver architecture handles this properly.
The mux state (0-15) represents all possible combinations of the four
independent switches.

State mapping examples:
- State 0 (0000): All switches OFF
- State 5 (0101): SW1=ON, SW2=OFF, SW3=ON, SW4=OFF
- State 15 (1111): All switches ON

This integration allows ADG1712 to leverage the existing mux framework
for switch control while reusing all existing gpio-mux infrastructure
without any code changes beyond adding the compatible string.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
 drivers/mux/gpio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mux/gpio.c b/drivers/mux/gpio.c
index 4cc3202c58f3..b363ad5a605b 100644
--- a/drivers/mux/gpio.c
+++ b/drivers/mux/gpio.c
@@ -40,6 +40,7 @@ static const struct mux_control_ops mux_gpio_ops = {
 
 static const struct of_device_id mux_gpio_dt_ids[] = {
 	{ .compatible = "gpio-mux", },
+	{ .compatible = "adi,adg1712", },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mux_gpio_dt_ids);
-- 
2.43.0