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The new ADI GPIO2 controller was introduced since the BF548 and BF60x processors. It differs a lot from the old one on BF5xx processors. So, create a pinctrl driver under the pinctrl framework. - Define gpio ports and pin interrupt controllers as individual platform devices. - Register a pinctrl driver for the whole GPIO ports and pin interrupt devices. - Probe pint devices before port devices. Put device instances into the global gpio and pint lists. - Define peripheral, irq and gpio reservation bit masks for each gpio port as runtime resources. - Save and restore gpio port and pint status MMRs in syscore PM functions. - Create the plug-in subdrivers to hold the pinctrl soc data for bf54x and bf60x. Add soc data into struct adi_pinctrl. Initialize the soc data in pin controller probe function. Get the pin groups and functions via the soc data reference. - Call gpiochip_add_pin_range() in gpio device probe function to register range cross reference between gpio device and pin control device. - Get range by pinctrl_find_gpio_range_from_pin(), find gpio_port object by container_of() and find adi_pinctrl by pin control device name. - Handle peripheral and gpio requests in pinctrl operation functions. - Demux gpio IRQs via the irq_domain created by each GPIO port. v2-changes: - Remove unlinke() directive. v3-changes: - Rename struct adi_pmx to adi_pinctrl. - Fix the comments of struct gpio_pint. - Remove unused pin_base in struct gpio_port. - Change pint_assign into bool type. - Add comments about the relationship between pint device and port device to the driver header. - Use BIT macro to shift bit. - Remove all bitmap reservation help functions. Inline reservation functions into the actual code. - Remove gpio and offset mutual reference help functions. - Remove all help functions to find gpio_port and adi_pinctrl structs. Get range by pinctrl_find_gpio_range_from_pin(), find gpio_port object by container_of() and find adi_pinctrl by pin control device name. - Pass bool type usage variable to port_setup help function. - Separate long bit operations into several lines and add comments. - Use debugfs to output all GPIO request information. - Avoid to set drvdata to NULL - Add explanation to function adi_gpio_init_int() - Call gpiochip_add_pin_range() in gpio device probe function to register range cross reference between gpio device and pin control device. - Remove the reference to pin control device from the gpio_port struct. Remove the reference list to gpio device from the adi_pinctrl struct. Replace the global adi_pinctrl list with adi_gpio_port_list. Walk through the gpio list to do power suspend and resume operations. - Remove the global GPIO base from struct adi_pinctrl, define pin base in the platform data for each GPIO port device. - Initialize adi_pinctrl_setup in arch_initcall(). - print the status of triggers, whether it is in GPIO mode, if it is flagged to be used as IRQ, etc in adi_pin_dbg_show(). - Create the plug-in subdrivers to hold the pinctrl soc data for bf54x and bf60x. Add soc data into struct adi_pinctrl. Initialize the soc data in pin controller probe function. Get the pin groups and functions via the soc data reference. v4-changes: - remove useless system_state checking. - replace dev_err with dev_warn in both irq and gpio pin cases. - comment on relationship between irq type and invert operation. - It is not necessary to check the reservation mode of the requested pin in IRQ chip operation. Remove the reservation map. - Use existing gpio/pinctrl subsystem debugfs files. Remove pinctrl-adi2 driver specific debugfs output. - Add linkport group and function information for bf60x. - Separate uart and ctsrts pins into 2 groups. - Separate APAPI and alternative ATAPI pins into 2 groups. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
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* Pinctrl Driver for ADI GPIO2 controller
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*
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* Copyright 2007-2013 Analog Devices Inc.
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*
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* Licensed under the GPLv2 or later
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*/
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#ifndef PINCTRL_PINCTRL_ADI2_H
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#define PINCTRL_PINCTRL_ADI2_H
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#include <linux/pinctrl/pinctrl.h>
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/**
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* struct adi_pin_group - describes a pin group
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* @name: the name of this pin group
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* @pins: an array of pins
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* @num: the number of pins in this array
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*/
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struct adi_pin_group {
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const char *name;
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const unsigned *pins;
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const unsigned num;
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};
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#define ADI_PIN_GROUP(n, p) \
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{ \
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.name = n, \
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.pins = p, \
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.num = ARRAY_SIZE(p), \
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}
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/**
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* struct adi_pmx_func - describes function mux setting of pin groups
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* @name: the name of this function mux setting
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* @groups: an array of pin groups
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* @num_groups: the number of pin groups in this array
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* @mux: the function mux setting array, end by zero
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*/
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struct adi_pmx_func {
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const char *name;
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const char * const *groups;
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const unsigned num_groups;
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const unsigned short *mux;
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};
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#define ADI_PMX_FUNCTION(n, g, m) \
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{ \
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.name = n, \
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.groups = g, \
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.num_groups = ARRAY_SIZE(g), \
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.mux = m, \
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}
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/**
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* struct adi_pinctrl_soc_data - ADI pin controller per-SoC configuration
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* @functions: The functions supported on this SoC.
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* @nfunction: The number of entries in @functions.
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* @groups: An array describing all pin groups the pin SoC supports.
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* @ngroups: The number of entries in @groups.
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* @pins: An array describing all pins the pin controller affects.
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* @npins: The number of entries in @pins.
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*/
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struct adi_pinctrl_soc_data {
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const struct adi_pmx_func *functions;
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int nfunctions;
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const struct adi_pin_group *groups;
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int ngroups;
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const struct pinctrl_pin_desc *pins;
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int npins;
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};
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void adi_pinctrl_soc_init(const struct adi_pinctrl_soc_data **soc);
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#endif /* PINCTRL_PINCTRL_ADI2_H */
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