linux-kernel - [PATCH 0/2] Add support for TI TPS65219 PMIC GPIO interface.

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Date:   Fri, 24 Feb 2023 12:38:35 +0100
From:   Jerome Neanne <jneanne@...libre.com>
To:     linus.walleij@...aro.org, brgl@...ev.pl, tony@...mide.com,
        lee@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-omap@...r.kernel.org, Jerome Neanne <jneanne@...libre.com>
Subject: [PATCH 0/2] Add support for TI TPS65219 PMIC GPIO interface.

GPIO interface consist in 3 pins:
Two GPIOS are output only: GPO1, GPO2.

GPIO0 is used for multi device support:
- The input-functionality is only used in multi-PMIC configuration
- In single-PMIC, it can be used as an output

The configuration is static and flashed in NVM in factory.
Description tps65219.pdf chapter 7.3.13

Linux must not change MULTI_DEVICE_ENABLE bit at run time.

This was done for test purpose only to check input/output
correct behavior on EVM board (no access to different NVM config).

Tested on k3-am62x-lp-sk board. This board MULTI_DEVICE_ENABLE=0

Despite the register bits are out of order,
driver is remapping in natural order:
GPIO0 is gpiochip line 0
GPO1/2 are gpiochip line 1/2

 Initial version by Jon Cormier on TI Mainline.
 Ported upstream by Jerome Neanne


Link: https://www.ti.com/lit/ds/symlink/tps65219.pdf

Jerome Neanne (2):
  gpio: tps65219: add GPIO support for TPS65219 PMIC
  mfd: tps65219: Add gpio cell instance

 MAINTAINERS                  |   1 +
 drivers/gpio/Kconfig         |  13 +++
 drivers/gpio/Makefile        |   1 +
 drivers/gpio/gpio-tps65219.c | 167 +++++++++++++++++++++++++++++++++++
 drivers/mfd/tps65219.c       |   7 +-
 5 files changed, 188 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpio/gpio-tps65219.c

-- 
2.34.1