summaryrefslogtreecommitdiff
path: root/drivers/pinctrl/pinctrl-nomadik.c
AgeCommit message (Collapse)Author
2012-06-01pinctrl-nomadik: Allow Device Tree driver probingLee Jones
The Nomadik GPIO controller now relies on Nomadik pinctrl, however the pinctrl driver is not currently started by any ux500 platform. This is requred or GPIOs do not work at all. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-05-11pinctrl/nomadik: implement pin configurationLinus Walleij
This implements the pin configuration interface for the Nomadik pin controller. As part of the exercise we add a bit in the pin_cfg_t for the Nomadik pinctrl driver that indicates if the pin should be forced into GPIO mode. This is not done to go behind the back of the GPIO subsystem, but to ensure that default modes can be set by hogs on boot and system suspend/resume states. It was used implicitly by the old code defining all config settings and modes in a single config word but we now have a split between pinmux and pinconf leading to the need to have this. We also add a bit for explicitly setting sleepmode of the pin. This was previously handled by custom calls with the _sleep() suffix, but we now have one single interface into the configuration so we replace this with a bit indicating that the pin shall be configured into sleep mode. Some of the configuration can be refactored later to use less custom fields on the pin_cfg_t but we are currently leaving the old function calls in place so we stay compatible. ChangeLog v1->v2: - Drop a hunk changing pinmuxing for GPIO and move it over to the preceding pinmux patch. Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-05-11pinctrl/nomadik: implement pin multiplexingLinus Walleij
Implements basic pinmux for the Nomadik pin controller. The plan is to split the existing singular pin config interface nmk_config_pin(), nmk_config_pins(), that will configure muxing and other settings at the same time, into two interfaces by splitting the code in pinmux and pinctrl and eventually deleting the old interface and its helper functions when all users are gone. nmk_gpio_set_mode() and nmk_gpio_get_mode() are two older interfaces for just configuring muxing/altfunctions that will also be replaced in the end. We take some extra care to handle the glitch-avoidance here, but it is simpler now since there is only one altsetting per pingroup so we know immediately if we need to avoid altfunc C glitches for a certain group. As part of the makeover implement the .request() and .free() calls on the GPIO chips and have them call back into the pinctrl layer to reserve GPIOs. ChangeLog v1->v2: - Rebased on pinctrl-mergebase-20120418 so we get the latest driver infrastructure where function count is done by a fixed value and we can drop a few range checks since this is now handled by the core. - Include a GPIO muxing hunk erroneously part of the pin config patch. Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-05-11pinctrl/nomadik: reuse GPIO debug function for pinsLinus Walleij
Since all pins we can control are GPIOs, match a GPIO range to each pin in the debug function and call into the GPIO debug print function to have the per-pin information. Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-05-11pinctrl/nomadik: break out single GPIO debug functionLinus Walleij
Break out the code displaying the status of a single pin so we can use the same code in the pinctrl debug function. Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-05-11pinctrl/nomadik: basic Nomadik pinctrl interfaceLinus Walleij
This adds a scratch pin control interface to the Nomadik pinctrl driver, and defines the pins and groups in the DB8500 ASIC. We define GPIO ranges to cover the pins exposed. The DB8500 has more pins than this but we restrict the driver to the pins that can be controlled from the combined GPIO and pin control hardware to begin with. ChangeLog v1->v2: - Base on the latest pinctrl development from pinctrl-mergebase-20120418 so we can get rid of legacy group count mechanism. Also drop the range checks for group index, this is handled by the core now. Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-05-11pinctrl/nomadik: !CONFIG_OF build errorArnd Bergmann
a60b57e "drivers/gpio: gpio-nomadik: Add support for irqdomains" broke building with CONFIG_OF_GPIO disabled. Without this patch, building nhk8815_defconfig results in: /home/arnd/linux-arm/drivers/gpio/gpio-nomadik.c: In function 'nmk_gpio_probe': /home/arnd/linux-arm/drivers/gpio/gpio-nomadik.c:1238:6: error: 'struct gpio_chip' has no member named 'of_node' make[3]: *** [drivers/gpio/gpio-nomadik.o] Error 1 make[2]: *** [drivers/gpio] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [drivers] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [sub-make] Error 2 Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-05-11gpio: move the Nomadik GPIO driver to pinctrlLinus Walleij
I'm moving this driver over to the pinctrl subsystem to convert the custom pin mux/config scheme over to use pinctrl. Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>