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path: root/drivers/pinctrl/pinctrl-st.c
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2014-03-12pinctrl: st: Fix error check for of_irq_to_resource usageSrinivas Kandagatla1-1/+1
This patch fixes an error check while using of_irq_to_resource. of_irq_to_resource returns non-zero interrupt number on success and zero on error. The driver was using error check is wrong way. Without this patch the driver will configure interrupt zero if there is no interrupt specified in the node. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12pinctrl: st: Use ARRAY_SIZE instead of raw value for number of delaysMaxime COQUELIN1-2/+2
This patch replaces the raw values with ARRAY_SIZE for assigning the ninput_delays and noutput_delays fields of STiH416's st_pctl_data struct. Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12pinctrl: st: add pinctrl support for the STiH407 SoCGiuseppe Cavallaro1-0/+17
This patch adds the initial support for pinctrl based on H407 SoC. Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12pinctrl: st: Enhance the controller to manage unavailable registersGiuseppe Cavallaro1-43/+61
This patch adds a new logic inside the st pinctrl to manage an unsupported scenario: some sysconfig are not available! This is the case of STiH407 where, although documented, the following registers from SYSCFG_FLASH have been removed from the SoC. SYSTEM_CONFIG3040 Output Enable pad control for all PIO Alternate Functions and SYSTEM_ CONFIG3050 Pull Up pad control for all PIO Alternate Functions Without managing this condition an imprecise external abort will be detect. To do this the patch also reviews the st_parse_syscfgs and other routines to manipulate the registers only if actually available. In any case, for example the st_parse_syscfgs detected an error condition but no action was made in the st_pctl_probe_dt. Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-02-10pinctrl: st: Add software edge trigger interrupt supportSrinivas Kandagatla1-2/+114
ST pin controller does not have hardware support for detecting edge triggered interrupts, It only has level triggering support. This patch attempts to fake up edge triggers from hw level trigger support in software. With this facility now the gpios can be easily used for keypads, otherwise it would be difficult for drivers like keypads to work with level trigger interrupts. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-02-10pinctrl: st: Add Interrupt supportSrinivas Kandagatla1-2/+223
This patch add interrupt support to the pincontroller driver. ST Pincontroller GPIO bank can have one of the two possible types of interrupt-wirings. First type is via irqmux, single interrupt is used by multiple gpio banks. This reduces number of overall interrupts numbers required. All these banks belong to a single pincontroller. _________ | |----> [gpio-bank (n) ] | |----> [gpio-bank (n + 1)] [irqN]-- | irq-mux |----> [gpio-bank (n + 2)] | |----> [gpio-bank (... )] |_________|----> [gpio-bank (n + 7)] Second type has a dedicated interrupt per gpio bank. [irqN]----> [gpio-bank (n)] Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-01-15pinctrl: st: Fix a typo in probeSrinivas Kandagatla1-4/+4
Probe function had commas instead of semi-colons on some of the lines. This patch just fixes those lines. No functional chagnes done in this patch. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-08-28pinctrl: Pass all configs to driver on pin_config_set()Sherman Yin1-4/+7
When setting pin configuration in the pinctrl framework, pin_config_set() or pin_config_group_set() is called in a loop to set one configuration at a time for the specified pin or group. This patch 1) removes the loop and 2) changes the API to pass the whole pin config array to the driver. It is now up to the driver to loop through the configs. This allows the driver to potentially combine configs and reduce the number of writes to pin config registers. All c files changed have been build-tested to verify the change compiles and that the corresponding .o is successfully generated. Signed-off-by: Sherman Yin <syin@broadcom.com> Reviewed-by: Christian Daudt <csd@broadcom.com> Reviewed-by: Matt Porter <matt.porter@linaro.org> Tested-by: Stephen Warren <swarren@nvidia.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-08-07pinctrl: st: Staticize local symbolsSachin Kamat1-4/+4
Symbols used only in this file are made static. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-08-07pinctrl: st: Convert to use devm_ioremap_resourceSachin Kamat1-5/+3
devm_request_and_ioremap is deprecated. Use devm_ioremap_resource instead. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-30pinctrl: st: Remove unnecessary use of of_match_ptr macroAxel Lin1-1/+1
This is a DT only driver and st_pctl_of_match is always compiled in. Hence of_match_ptr is unnecessary. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-06-28pinctrl: st: fix return value checkWei Yongjun1-4/+4
In case of error, the function pinctrl_register() returns NULL not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. The function syscon_regmap_lookup_by_phandle() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-06-25pinctrl: st: Add pinctrl and pinconf support.Srinivas KANDAGATLA1-0/+1403
This patch add pinctrl support to ST SoCs. About hardware: ST Set-Top-Box parts have two blocks called PIO and PIO-mux which handle pin configurations. Each multi-function pin is controlled, driven and routed through the PIO multiplexing block. Each pin supports GPIO functionality (ALT0) and multiple alternate functions(ALT1 - ALTx) that directly connect the pin to different hardware blocks. When a pin is in GPIO mode, Output Enable (OE), Open Drain(OD), and Pull Up (PU) are driven by the related PIO block. Otherwise the PIO multiplexing block configures these parameters and retiming the signal. About driver: This pinctrl driver manages both PIO and PIO-mux block using pinctrl, pinconf, pinmux, gpio subsystems. All the pinctrl related config information can only come from device trees. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
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