From: <Andrei.Stefanescu@microchip.com>
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
Subject: [PATCH v2 0/2] add SAMA5D2 PIOBU GPIO driver
Date: Tue, 20 Nov 2018 08:08:33 +0000 [thread overview]
Message-ID: <1542701330-23466-1-git-send-email-andrei.stefanescu@microchip.com> (raw)
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).
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 = PIOBU_BASE + pin * PIOBU_REG_SIZE;
Also, no irq capability implemented.
Andrei Stefanescu (2):
dt-bindings: gpio: add SAMA5D2 PIOBU support
gpio: add driver for SAMA5D2 PIOBU pins
.../bindings/gpio/gpio-sama5d2-piobu.txt | 31 +++
MAINTAINERS | 7 +
drivers/gpio/Kconfig | 11 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-sama5d2-piobu.c | 253 +++++++++++++++++++++
5 files changed, 303 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt
create mode 100644 drivers/gpio/gpio-sama5d2-piobu.c
--
2.7.4
next reply other threads:[~2018-11-20 8:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-20 8:08 Andrei.Stefanescu [this message]
2018-11-20 8:08 ` [PATCH v2 1/2] dt-bindings: gpio: add SAMA5D2 PIOBU support Andrei.Stefanescu
2018-12-04 9:58 ` Andrei.Stefanescu
2018-12-04 23:22 ` Rob Herring
2018-12-05 11:06 ` Andrei.Stefanescu
2018-12-05 15:22 ` Rob Herring
2018-11-20 8:08 ` [PATCH v2 2/2] gpio: add driver for SAMA5D2 PIOBU pins Andrei.Stefanescu
2018-11-20 10:02 ` [PATCH v2 0/2] add SAMA5D2 PIOBU GPIO driver Linus Walleij
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