[PATCH v3 0/2] XRA1403,gpio - add XRA1403 gpio expander driver
The patchset will add a driver to support basic functionality for XRA1403 device. Features supported: - get/set GPIO direction (input, output) - get/set GPIO level (low, high) Documentation: A gpio-xra1403.txt file was added to document the DTS bindings related to driver. Testing: 1.1 XRA1403 connected to iMX53 MCU 1.2 Use the GPIO tools provided by kernel from tools/gpio dir 2.1 `lsgpio` root@csmon ppd:~# lsgpio GPIO chip: gpiochip8, "xra1403", 16 GPIO lines line 0: unnamed unused [output] line 1: unnamed unused [output] line 2: unnamed unused [output] line 3: unnamed unused [output] line 4: unnamed unused [output] line 5: unnamed unused line 6: unnamed unused line 7: unnamed unused [output] line 8: unnamed unused [output] line 9: unnamed unused line 10: unnamed unused [output] line 11: unnamed unused line 12: unnamed unused line 13: unnamed unused line 14: unnamed unused line 15: unnamed unused [output] GPIO chip: gpiochip7, "xra1403", 16 GPIO lines line 0: unnamed unused line 1: unnamed unused line 2: unnamed unused line 3: unnamed unused line 4: unnamed unused line 5: unnamed unused line 6: unnamed unused line 7: unnamed unused line 8: unnamed unused line 9: unnamed unused line 10: unnamed unused line 11: unnamed unused line 12: unnamed unused line 13: unnamed unused line 14: unnamed unused line 15: unnamed unused 3.1 `gpio-hammer` root@csmon ppd:~# gpio-hammer -n gpiochip8 -o0 -o1 -o2 -o3 Hammer lines [0, 1, 2, 3] on gpiochip8, initial states: [0, 0, 0, 0] [\] [0: 0, 1: 0, 2: 0, 3: 0] ... [\] [0: 1, 1: 1, 2: 1, 3: 1] When using `gpio-hammer` I also attached an oscilloscope to one of the pins and I was able to monitor and validate the GPIO status. Changes since v2: - improve the commit message by removing the "sysfs" dependency and be more clear. - include "seq_file.h" header. Note: documentation patches were accepted already. Changes since v1: - use regmap for driver - small changes to documentation Nandor Han (2): gpio - Add EXAR XRA1403 SPI GPIO expander driver Add XRA1403 support to MAINTAINERS file MAINTAINERS | 8 ++ drivers/gpio/Kconfig| 5 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-xra1403.c | 237 4 files changed, 251 insertions(+) create mode 100644 drivers/gpio/gpio-xra1403.c -- 2.10.1
[PATCH v3 0/2] XRA1403,gpio - add XRA1403 gpio expander driver
The patchset will add a driver to support basic functionality for XRA1403 device. Features supported: - get/set GPIO direction (input, output) - get/set GPIO level (low, high) Documentation: A gpio-xra1403.txt file was added to document the DTS bindings related to driver. Testing: 1.1 XRA1403 connected to iMX53 MCU 1.2 Use the GPIO tools provided by kernel from tools/gpio dir 2.1 `lsgpio` root@csmon ppd:~# lsgpio GPIO chip: gpiochip8, "xra1403", 16 GPIO lines line 0: unnamed unused [output] line 1: unnamed unused [output] line 2: unnamed unused [output] line 3: unnamed unused [output] line 4: unnamed unused [output] line 5: unnamed unused line 6: unnamed unused line 7: unnamed unused [output] line 8: unnamed unused [output] line 9: unnamed unused line 10: unnamed unused [output] line 11: unnamed unused line 12: unnamed unused line 13: unnamed unused line 14: unnamed unused line 15: unnamed unused [output] GPIO chip: gpiochip7, "xra1403", 16 GPIO lines line 0: unnamed unused line 1: unnamed unused line 2: unnamed unused line 3: unnamed unused line 4: unnamed unused line 5: unnamed unused line 6: unnamed unused line 7: unnamed unused line 8: unnamed unused line 9: unnamed unused line 10: unnamed unused line 11: unnamed unused line 12: unnamed unused line 13: unnamed unused line 14: unnamed unused line 15: unnamed unused 3.1 `gpio-hammer` root@csmon ppd:~# gpio-hammer -n gpiochip8 -o0 -o1 -o2 -o3 Hammer lines [0, 1, 2, 3] on gpiochip8, initial states: [0, 0, 0, 0] [\] [0: 0, 1: 0, 2: 0, 3: 0] ... [\] [0: 1, 1: 1, 2: 1, 3: 1] When using `gpio-hammer` I also attached an oscilloscope to one of the pins and I was able to monitor and validate the GPIO status. Changes since v2: - improve the commit message by removing the "sysfs" dependency and be more clear. - include "seq_file.h" header. Note: documentation patches were accepted already. Changes since v1: - use regmap for driver - small changes to documentation Nandor Han (2): gpio - Add EXAR XRA1403 SPI GPIO expander driver Add XRA1403 support to MAINTAINERS file MAINTAINERS | 8 ++ drivers/gpio/Kconfig| 5 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-xra1403.c | 237 4 files changed, 251 insertions(+) create mode 100644 drivers/gpio/gpio-xra1403.c -- 2.10.1
