lkml.org 
[lkml]   [2018]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 0/2] add SAMA5D2 PIOBU GPIO driver
Date
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).

v4:
- readd Makefile and Kconfig changes which are missing in v3

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 = 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/Kconfig | 11 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-sama5d2-piobu.c | 253 +++++++++++++++++++++
5 files changed, 282 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpio/gpio-sama5d2-piobu.c

--
2.7.4

\
 
 \ /
  Last update: 2018-12-12 12:57    [W:0.239 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site