| From: |
| Piyush Mehta <piyush.mehta-AT-xilinx.com> |
| To: |
| <arnd-AT-arndb.de>, <zou_wei-AT-huawei.com>, <gregkh-AT-linuxfoundation.org>, <linus.walleij-AT-linaro.org>, <michal.simek-AT-xilinx.com>, <wendy.liang-AT-xilinx.com>, <iwamatsu-AT-nigauri.org>, <bgolaszewski-AT-baylibre.com>, <robh+dt-AT-kernel.org>, <rajan.vaja-AT-xilinx.com> |
| Subject: |
| [PATCH V4 0/3] gpio: modepin: Add driver support for modepin GPIO controller |
| Date: |
| Wed, 22 Sep 2021 19:23:16 +0530 |
| Message-ID: |
| <20210922135319.3128153-1-piyush.mehta@xilinx.com> |
| Cc: |
| <linux-gpio-AT-vger.kernel.org>, <devicetree-AT-vger.kernel.org>, <git-AT-xilinx.com>, <sgoud-AT-xilinx.com>, <linux-arm-kernel-AT-lists.infradead.org>, <linux-kernel-AT-vger.kernel.org>, Piyush Mehta <piyush.mehta-AT-xilinx.com> |
| Archive-link: |
| Article |
This patch adds support for the zynqmp modepin GPIO controller and
documented for the same. GPIO modepin driver set and get the value and
status of the PS_MODE pin, based on device-tree pin configuration.
These four-bits boot-mode pins are dedicated configurable as input/output.
After the stabilization of the system,these mode pins are sampled.
To access GPIO pins, added Xilinx ZynqMP firmware MDIO API support to
set and get PS_MODE pins value and status. These APIs are interface
APIs, between the mode pin controller driver and low-level API.
---
Changes in v2:
- Added Xilinx ZynqMP firmware MMIO API support to set and get pin
value and status.
- DT Documentation- Addressed review comments: Update commit message
- Modepin driver- Addressed review comments:
- Update APIs
- Removed unwanted variables
- Handle return path for probe function
Review Comments:
https://lore.kernel.org/linux-arm-kernel/20210624205055.G...
Changes in v3:
- Update example in dt-bindings documentation
- Update probe function return value
- Remove unnecessary print and header file
Review Comments:
https://lore.kernel.org/linux-arm-kernel/20210805174219.3...
Changes in v4:
- Added input pin read status in modepin_gpio_get_value.
- Updated modepin control bit for out configuration.
Review Comments:
https://lore.kernel.org/linux-arm-kernel/554508f5-8cb5-38...
---
Piyush Mehta (3):
firmware: zynqmp: Add MMIO read and write support for PS_MODE pin
dt-bindings: gpio: zynqmp: Add binding documentation for modepin
gpio: modepin: Add driver support for modepin GPIO controller
.../bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml | 43 ++++++
drivers/firmware/xilinx/zynqmp.c | 46 ++++++
drivers/gpio/Kconfig | 12 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-zynqmp-modepin.c | 162 +++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 14 ++
6 files changed, 278 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml
create mode 100644 drivers/gpio/gpio-zynqmp-modepin.c
--
2.7.4
