From: "Michael Walle" <mwalle@kernel.org>
To: "Yu-Chun Lin [林祐君]" <eleanor.lin@realtek.com>,
"linusw@kernel.org" <linusw@kernel.org>,
"andriy.shevchenko@intel.com" <andriy.shevchenko@intel.com>,
"brgl@kernel.org" <brgl@kernel.org>,
"TY_Chang[張子逸]" <tychang@realtek.com>,
"wbg@kernel.org" <wbg@kernel.org>,
"mathieu.dubois-briand@bootlin.com"
<mathieu.dubois-briand@bootlin.com>,
"nuno.sa@analog.com" <nuno.sa@analog.com>,
"Michael.Hennerich@analog.com" <Michael.Hennerich@analog.com>,
"jic23@kernel.org" <jic23@kernel.org>,
"andy@kernel.org" <andy@kernel.org>,
"u.kleine-koenig@baylibre.com" <u.kleine-koenig@baylibre.com>,
"dakr@kernel.org" <dakr@kernel.org>,
"bhelgaas@google.com" <bhelgaas@google.com>,
"o-takashi@sakamocchi.jp" <o-takashi@sakamocchi.jp>
Cc: "dlechner@baylibre.com" <dlechner@baylibre.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"linux@analog.com" <linux@analog.com>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>,
"CY_Huang[黃鉦晏]" <cy.huang@realtek.com>,
"James Tai [戴志峰]" <james.tai@realtek.com>
Subject: Re: [PATCH v7 5/9] gpio: regmap: Add gpio_regmap_operation to extend reg_mask_xlate callback
Date: Thu, 23 Jul 2026 13:20:20 +0200 [thread overview]
Message-ID: <DK5WSEM5SVXT.2A5HHVXDHGYGF@kernel.org> (raw)
In-Reply-To: <f4b79d5510b64ad3bc2d716a51d21cfe@realtek.com>
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Hi,
On Thu Jul 23, 2026 at 1:14 PM CEST, Yu-Chun Lin [林祐君] wrote:
> Regarding the hardware, this controller indeed has dedicated and separate
> bits for IN, OUT, and DIR. If configured as an output, reading the IN bit
> does not reflect the actual state, so we must check the DIR bit first to
> know which bit to read.
Just out of curiosity, the out bit is also the control bit which
will set the gpio line state, correct? IOW, you are reading just the
bit you've set before and there is no way to read the real line
state.
-michael
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next prev parent reply other threads:[~2026-07-23 11:20 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-23 3:42 [PATCH v7 0/9] gpio: realtek: Add support for Realtek DHC RTD1625 Yu-Chun Lin
2026-07-23 3:42 ` [PATCH v7 1/9] Revert "gpio: realtek: Add driver for Realtek DHC RTD1625 SoC" Yu-Chun Lin
2026-07-23 3:42 ` [PATCH v7 2/9] gpio: regmap: Provide default IRQ resource request and release callbacks Yu-Chun Lin
2026-07-23 3:42 ` [PATCH v7 3/9] gpio: regmap: Apply default resource callbacks for regmap IRQ chip Yu-Chun Lin
2026-07-23 3:42 ` [PATCH v7 4/9] gpio: regmap: Order kernel-doc descriptions with the actual appearance Yu-Chun Lin
2026-07-23 3:42 ` [PATCH v7 5/9] gpio: regmap: Add gpio_regmap_operation to extend reg_mask_xlate callback Yu-Chun Lin
2026-07-23 6:51 ` Michael Walle
2026-07-23 11:14 ` Yu-Chun Lin [林祐君]
2026-07-23 11:20 ` Michael Walle [this message]
2026-07-23 3:42 ` [PATCH v7 6/9] gpio: regmap: Add value_xlate callback Yu-Chun Lin
2026-07-23 6:54 ` Michael Walle
2026-07-23 3:42 ` [PATCH v7 7/9] gpio: regmap: Add set_config callback Yu-Chun Lin
2026-07-23 7:01 ` Michael Walle
2026-07-23 3:42 ` [PATCH v7 8/9] gpio: regmap: Add IRQ enable/disable helpers Yu-Chun Lin
2026-07-23 3:42 ` [PATCH v7 9/9] gpio: realtek: Add driver for Realtek DHC RTD1625 SoC Yu-Chun Lin
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