From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH v3 0/2] add SAMA5D2 PIOBU GPIO driver Date: Fri, 7 Dec 2018 06:46:24 +0000 Message-ID: <1544165160-13653-1-git-send-email-andrei.stefanescu@microchip.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: linus.walleij@linaro.org, gregkh@linuxfoundation.org, Nicolas.Ferre@microchip.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: Ludovic.Desroches@microchip.com, Cristian.Birsan@microchip.com, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Andrei.Stefanescu@microchip.com List-Id: linux-gpio@vger.kernel.org On SAMA5D2 SoC the PIOBU pins do not lose their voltage during Backup/Self-refresh mode. This can be useful, for example, when the voltage must remain positive for a peripheral during Backup/Self-refresh mode (suspend-to ram is the Linux equivalent state). v3: - change driver's compatible to atmel,sama5d2-secumod - get syscon using syscon_node_to_regmap(pdev->dev.of_node) - document how to use SECUMOD as a gpio-controller v2: - make driver be a subnode of the syscon node - change Kconfig to depend on MFD_SYSCON and select GPIO_SYSCON - change include header from linux/gpio.h to linux/gpio/driver.h - include linux/bits.h header - change intrusion in comment to tamper - fix kerneldoc of functions - replace GPIOF_DIR_* flags with 0/1 - replace ?: statement with if-else - remove the use of sama5d2_piobu_template_chip - retrieve syscon via syscon_node_to_regmap(pdev->dev.parent->of_node); Note that PIOBU_REG_SIZE is used to determine the register to write to with regmap: reg =3D PIOBU_BASE + pin * PIOBU_REG_SIZE; Also, no irq capability implemented. Andrei Stefanescu (2): dt-bindings: arm: atmel: describe SECUMOD usage as a GPIO controller gpio: add driver for SAMA5D2 PIOBU pins .../devicetree/bindings/arm/atmel-sysregs.txt | 12 +- MAINTAINERS | 6 + drivers/gpio/gpio-sama5d2-piobu.c | 253 +++++++++++++++++= ++++ 3 files changed, 270 insertions(+), 1 deletion(-) create mode 100644 drivers/gpio/gpio-sama5d2-piobu.c --=20 2.7.4