From: Dmitriy Sharikhin <d.sharikhin@yadro.com>
To: "sai.pavan.boddu@amd.com" <sai.pavan.boddu@amd.com>,
"edgar.iglesias@amd.com" <edgar.iglesias@amd.com>,
"francisco.iglesias@amd.com" <francisco.iglesias@amd.com>,
"shentey@gmail.com" <shentey@gmail.com>,
"philmd@linaro.org" <philmd@linaro.org>
Cc: "andrew.smirnov@gmail.com" <andrew.smirnov@gmail.com>,
"alistair@alistair23.me" <alistair@alistair23.me>,
"marcandre.lureau@redhat.com" <marcandre.lureau@redhat.com>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
"edgar.iglesias@gmail.com" <edgar.iglesias@gmail.com>,
"jcd@tribudubois.net" <jcd@tribudubois.net>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [PATCH 20/21] hw/i2c: Import TCA6416 emulation from Xilinx
Date: Mon, 3 Feb 2025 05:42:55 +0000 [thread overview]
Message-ID: <bfe7bca1df7d420266ec804d00a5352ef187c13c.camel@yadro.com> (raw)
In-Reply-To: <9d957453-5749-47c7-aad1-6977dac9aeea@linaro.org>
At Sun, 02/02/2025 at 18:09 +0100, Philippe Mathieu-Daudé writes:
> No clue about compatibility. If you unfortunately need to add it,
> then please address my comments in the next version.
TCA6416 is _way_ more complex device than PCF8574. Basically PCF8574 is
shift register directly connected to IO lines, while TCA6416 is more like
fully-fledged GPIO controller with output direction, drive strength, interrupt
mask configuration etc etc.
In Linux kernel these devices are handled by family-compatible driver
drivers/gpio/gpio-pca953x.c
Closest things by implementation in QEMU source tree are
hw/gpio/pca9552.c and
hw/gpio/pca9554.c
However they are NOT register-compatible with pca953x. I suppose, best
decision would be new driver for TCA6416 which eventually should support whole
pca953x family of I2C GPIO expanders.
Best regards,
Dmitrii
next prev parent reply other threads:[~2025-02-03 5:43 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-20 20:37 [PATCH 00/21] Add i.MX 8M Plus EVK machine Bernhard Beschow
2025-01-20 20:37 ` [PATCH 01/21] hw/char/imx_serial: Fix reset value of UFCR register Bernhard Beschow
2025-01-20 20:37 ` [PATCH 02/21] hw/char/imx_serial: Update all state before restarting ageing timer Bernhard Beschow
2025-01-20 20:37 ` [PATCH 03/21] hw/pci-host/designware: Expose MSI IRQ Bernhard Beschow
2025-01-20 20:37 ` [PATCH 04/21] hw/usb/hcd-dwc3: Align global registers size with Linux Bernhard Beschow
2025-01-28 14:21 ` Peter Maydell
2025-01-20 20:37 ` [PATCH 05/21] hw/arm: Add i.MX 8M Plus EVK board Bernhard Beschow
2025-01-28 14:29 ` Peter Maydell
2025-01-28 22:16 ` Bernhard Beschow
2025-01-29 12:17 ` Peter Maydell
2025-01-29 13:04 ` Bernhard Beschow
2025-01-20 20:37 ` [PATCH 06/21] hw/arm/fsl-imx8mp: Implement clock tree Bernhard Beschow
2025-01-28 14:35 ` Peter Maydell
2025-01-28 21:53 ` Bernhard Beschow
2025-01-20 20:37 ` [PATCH 07/21] hw/arm/fsl-imx8mp: Add SNVS Bernhard Beschow
2025-01-28 14:31 ` Peter Maydell
2025-01-20 20:37 ` [PATCH 08/21] hw/arm/fsl-imx8mp: Add USDHC storage controllers Bernhard Beschow
2025-01-21 2:52 ` BALATON Zoltan
2025-02-03 23:01 ` Bernhard Beschow
2025-01-20 20:37 ` [PATCH 09/21] hw/arm/fsl-imx8mp: Add PCIe support Bernhard Beschow
2025-01-28 14:33 ` Peter Maydell
2025-01-28 22:04 ` Bernhard Beschow
2025-01-29 17:54 ` BALATON Zoltan
2025-02-01 14:45 ` Bernhard Beschow
2025-01-20 20:37 ` [PATCH 10/21] hw/arm/fsl-imx8mp: Add GPIO controllers Bernhard Beschow
2025-01-20 20:37 ` [PATCH 11/21] hw/arm/fsl-imx8mp: Add I2C controllers Bernhard Beschow
2025-01-20 20:37 ` [PATCH 12/21] hw/arm/fsl-imx8mp: Add SPI controllers Bernhard Beschow
2025-01-20 20:37 ` [PATCH 13/21] hw/arm/fsl-imx8mp: Add watchdog support Bernhard Beschow
2025-01-20 20:37 ` [PATCH 14/21] hw/arm/fsl-imx8mp: Implement gneral purpose timers Bernhard Beschow
2025-01-20 20:37 ` [PATCH 15/21] hw/arm/fsl-imx8mp: Add Ethernet controller Bernhard Beschow
2025-01-20 20:37 ` [PATCH 16/21] hw/arm/fsl-imx8mp: Add USB support Bernhard Beschow
2025-01-20 20:37 ` [PATCH 17/21] hw/arm/fsl-imx8mp: Add boot ROM Bernhard Beschow
2025-01-21 3:00 ` BALATON Zoltan
2025-01-21 21:03 ` Bernhard Beschow
2025-01-20 20:37 ` [PATCH 18/21] hw/arm/fsl-imx8mp: Add on-chip RAM Bernhard Beschow
2025-01-20 20:37 ` [PATCH 19/21] hw/rtc: Add Ricoh RS5C372 RTC emulation Bernhard Beschow
2025-01-20 20:37 ` [PATCH 20/21] hw/i2c: Import TCA6416 emulation from Xilinx Bernhard Beschow
2025-01-21 3:07 ` BALATON Zoltan
2025-01-28 22:20 ` Bernhard Beschow
2025-01-30 1:14 ` Corey Minyard
2025-01-30 23:05 ` Philippe Mathieu-Daudé
2025-02-01 15:28 ` Bernhard Beschow
2025-02-02 17:09 ` Philippe Mathieu-Daudé
2025-02-03 5:42 ` Dmitriy Sharikhin [this message]
2025-02-04 8:13 ` Bernhard Beschow
2025-02-17 18:06 ` Bernhard Beschow
2025-02-03 22:38 ` Bernhard Beschow
2025-01-20 20:37 ` [PATCH 21/21] hw/gpio/imx_gpio: Don't clear input GPIO values upon reset Bernhard Beschow
2025-01-28 14:33 ` Gustavo Romero
2025-02-03 23:06 ` Bernhard Beschow
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