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 PMIC datasheet: Link: https://www.ti.com/lit/ds/symlink/tps65219.pdf Changes in v2: andy.shevchenko review - Typo and indentation in commit message. - Clarify Co-developer role. - Specify name for module. - Code simplification for tps65219_gpio_set - Put test code into #if 0 ... #endif to make it easier to re-use - Formatting for .driver - remove dupplicated error management => dead code Previous version: v1 - https://lore.kernel.org/all/20230224113837.874264-1-jneanne@xxxxxxxxxxxx/ Co-developed-by: Jonathan Cormier <jcormier@xxxxxxxxxxxxxxxx> Signed-off-by: Jonathan Cormier <jcormier@xxxxxxxxxxxxxxxx> Signed-off-by: Jerome Neanne <jneanne@xxxxxxxxxxxx> 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 --- Jerome Neanne (2): gpio: tps65219: add GPIO support for TPS65219 PMIC mfd: tps65219: Add gpio cell instance MAINTAINERS | 1 + drivers/gpio/Kconfig | 17 +++++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-tps65219.c | 173 +++++++++++++++++++++++++++++++++++++++++++ drivers/mfd/tps65219.c | 2 +- 5 files changed, 193 insertions(+), 1 deletion(-) --- base-commit: 1a5304fecee523060f26e2778d9d8e33c0562df3 change-id: 20230511-tps65219-add-gpio-support-322bdb4e0297 Best regards, -- Jerome Neanne <jneanne@xxxxxxxxxxxx>
