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
