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https://mirrors.bfsu.edu.cn/git/linux.git
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1eccc6e152
Core infrastructural changes: - Support for natively single-ended GPIO driver stages. This means that if the hardware has registers to configure open drain or open source configuration, we use that rather than (as we did before) try to emulate it by switching the line to an input to get high impedance. This is also documented throughly in Documentation/gpio/driver.txt for those of you who did not understand one word of what I just wrote. - Start to do away with the unnecessarily complex and unitelligible ARCH_REQUIRE_GPIOLIB and ARCH_WANT_OPTIONAL_GPIOLIB, another evolutional artifact from the time when the GPIO subsystem was unmaintained. Archs can now just select GPIOLIB and be done with it, cleanups to arches will trickle in for the next kernel. Some minor archs ACKed the changes immediately so these are included in this pull request. - Advancing the use of the data pointer inside the GPIO device for storing driver data by switching the PowerPC, Super-H Unicore and a few other subarches or subsystem drivers in ALSA SoC, Input, serial, SSB, staging etc to use it. - The initialization now reads the input/output state of the GPIO lines, so that each GPIO descriptor knows - if this callback is implemented - whether the line is input or output. This also reflects nicely in userspace "lsgpio". - It is now possible to name GPIO producer names, line names, from the device tree. (Platform data has been supported for a while.) I bet we will get a similar mechanism for ACPI one of those days. This makes is possible to get sensible producer names for e.g. GPIO rails in "lsgpio" in userspace. New drivers: - New driver for the Loongson1. - The XLP driver now supports Broadcom Vulcan ARM64. - The IT87 driver now supports IT8620 and IT8628. - The PCA953X driver now supports Galileo Gen2. Driver improvements: - MCP23S08 was switched to use the gpiolib irqchip helpers and now also suppors level-triggered interrupts. - 74x164 and RCAR now supports the .set_multiple() callback - AMDPT was converted to use generic GPIO. - TC3589x, TPS65218, SX150X, F7188X, MENZ127, VX855, WM831X, WM8994 support the new single ended callback for open drain and in some cases open source. - Implement the .get_direction() callback for a few more drivers like PL061, Xgene. Cleanups: - Paul Gortmaker combed through the drivers and de-modularized those who are not really modules. - Move the GPIO poweroff DT bindings to the power subdir where they belong. - Rename gpio-generic.c to gpio-mmio.c, which is much more to the point. That's what it is handling, nothing more, nothing less. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJXOuJ5AAoJEEEQszewGV1zNXsQAII5wtkP69WRJ3goYBKg1dZN DkuLqZyVI4hCgRhptzUW10gDLHKKOCVubfetTJHSpyG/dWDJXPCyH6FHF+pW6lMX y+em8kAvWctKpaosy4EM7O55/IohW0/fNCTOfzfrUNivjydFuA2XwPUiPqC7111O DeKlC/t+W1JEvZTiKMi83pKq+9wqhiHmD0qxRHhV57S+MT8e7mdlSKOp7uUkKPkg LPlerXosnmeFjL2emuSnKl/tq8pOyruU6uaIGG/uwpbo2W86Dok9GY2GWkQ4pANT pDtprc4aJ/Clf6Q0CoKwQbmAozqTDeJo+Und9tRs2KuZRly2bWOcyVE0lyK+Y4s0 544LcKw2q6cB9ARZ6JExEVRJejPISGKMqo9TaHkyNSIJoiiatKYvNS4WVeFtTgbI W+1WfM1svPymNRqVPO1PMLV+3m9dalDH2WjtaFF21uCAQ/G0AuPEHjEDbbx0HIpb qrvWmYzZ97Rm/LdYROFRO53nEdCp2jh6c3n4/2kGYM8H0suvGxXZsB1g4i+Dm+B+ qKVTS282azlDuH9ohXeXizeb6atK6s8TC3Rmew97SmXDO00cUQzEQO/ZquRLHY9r n83afQ4OL2Z9yruAxAk7pCshVSyheOsHuFPuZ7bwPW31VMdoWNRkhnaTUXMjGfYg 3y39IHrCKWNMCCVM1iNl =z4d6 -----END PGP SIGNATURE----- Merge tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO updates from Linus Walleij: "This is the bulk of GPIO changes for kernel cycle v4.7: Core infrastructural changes: - Support for natively single-ended GPIO driver stages. This means that if the hardware has registers to configure open drain or open source configuration, we use that rather than (as we did before) try to emulate it by switching the line to an input to get high impedance. This is also documented throughly in Documentation/gpio/driver.txt for those of you who did not understand one word of what I just wrote. - Start to do away with the unnecessarily complex and unitelligible ARCH_REQUIRE_GPIOLIB and ARCH_WANT_OPTIONAL_GPIOLIB, another evolutional artifact from the time when the GPIO subsystem was unmaintained. Archs can now just select GPIOLIB and be done with it, cleanups to arches will trickle in for the next kernel. Some minor archs ACKed the changes immediately so these are included in this pull request. - Advancing the use of the data pointer inside the GPIO device for storing driver data by switching the PowerPC, Super-H Unicore and a few other subarches or subsystem drivers in ALSA SoC, Input, serial, SSB, staging etc to use it. - The initialization now reads the input/output state of the GPIO lines, so that each GPIO descriptor knows - if this callback is implemented - whether the line is input or output. This also reflects nicely in userspace "lsgpio". - It is now possible to name GPIO producer names, line names, from the device tree. (Platform data has been supported for a while). I bet we will get a similar mechanism for ACPI one of those days. This makes is possible to get sensible producer names for e.g. GPIO rails in "lsgpio" in userspace. New drivers: - New driver for the Loongson1. - The XLP driver now supports Broadcom Vulcan ARM64. - The IT87 driver now supports IT8620 and IT8628. - The PCA953X driver now supports Galileo Gen2. Driver improvements: - MCP23S08 was switched to use the gpiolib irqchip helpers and now also suppors level-triggered interrupts. - 74x164 and RCAR now supports the .set_multiple() callback - AMDPT was converted to use generic GPIO. - TC3589x, TPS65218, SX150X, F7188X, MENZ127, VX855, WM831X, WM8994 support the new single ended callback for open drain and in some cases open source. - Implement the .get_direction() callback for a few more drivers like PL061, Xgene. Cleanups: - Paul Gortmaker combed through the drivers and de-modularized those who are not really modules. - Move the GPIO poweroff DT bindings to the power subdir where they belong. - Rename gpio-generic.c to gpio-mmio.c, which is much more to the point. That's what it is handling, nothing more, nothing less" * tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (126 commits) MIPS: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB gpio: zevio: make it explicitly non-modular gpio: timberdale: make it explicitly non-modular gpio: stmpe: make it explicitly non-modular gpio: sodaville: make it explicitly non-modular pinctrl: sh-pfc: Let gpio_chip.to_irq() return zero on error gpio: dwapb: Add ACPI device ID for DWAPB GPIO controller on X-Gene platforms gpio: dt-bindings: add wd,mbl-gpio bindings gpio: of: make it possible to name GPIO lines gpio: make gpiod_to_irq() return negative for NO_IRQ gpio: xgene: implement .get_direction() gpio: xgene: Enable ACPI support for X-Gene GFC GPIO driver gpio: tegra: Implement gpio_get_direction callback gpio: set up initial state from .get_direction() gpio: rename gpio-generic.c into gpio-mmio.c gpio: generic: fix GPIO_GENERIC_PLATFORM is set to module case gpio: dwapb: add gpio-signaled acpi event support gpio: dwapb: convert device node to fwnode gpio: dwapb: remove name from dwapb_port_property gpio/qoriq: select IRQ_DOMAIN ...
520 lines
13 KiB
C
520 lines
13 KiB
C
/*
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* Renesas R-Car GPIO Support
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*
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* Copyright (C) 2014 Renesas Electronics Corporation
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* Copyright (C) 2013 Magnus Damm
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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struct gpio_rcar_priv {
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void __iomem *base;
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spinlock_t lock;
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struct platform_device *pdev;
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struct gpio_chip gpio_chip;
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struct irq_chip irq_chip;
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struct clk *clk;
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unsigned int irq_parent;
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bool has_both_edge_trigger;
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bool needs_clk;
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};
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#define IOINTSEL 0x00 /* General IO/Interrupt Switching Register */
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#define INOUTSEL 0x04 /* General Input/Output Switching Register */
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#define OUTDT 0x08 /* General Output Register */
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#define INDT 0x0c /* General Input Register */
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#define INTDT 0x10 /* Interrupt Display Register */
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#define INTCLR 0x14 /* Interrupt Clear Register */
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#define INTMSK 0x18 /* Interrupt Mask Register */
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#define MSKCLR 0x1c /* Interrupt Mask Clear Register */
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#define POSNEG 0x20 /* Positive/Negative Logic Select Register */
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#define EDGLEVEL 0x24 /* Edge/level Select Register */
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#define FILONOFF 0x28 /* Chattering Prevention On/Off Register */
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#define BOTHEDGE 0x4c /* One Edge/Both Edge Select Register */
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#define RCAR_MAX_GPIO_PER_BANK 32
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static inline u32 gpio_rcar_read(struct gpio_rcar_priv *p, int offs)
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{
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return ioread32(p->base + offs);
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}
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static inline void gpio_rcar_write(struct gpio_rcar_priv *p, int offs,
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u32 value)
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{
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iowrite32(value, p->base + offs);
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}
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static void gpio_rcar_modify_bit(struct gpio_rcar_priv *p, int offs,
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int bit, bool value)
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{
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u32 tmp = gpio_rcar_read(p, offs);
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if (value)
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tmp |= BIT(bit);
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else
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tmp &= ~BIT(bit);
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gpio_rcar_write(p, offs, tmp);
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}
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static void gpio_rcar_irq_disable(struct irq_data *d)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct gpio_rcar_priv *p = gpiochip_get_data(gc);
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gpio_rcar_write(p, INTMSK, ~BIT(irqd_to_hwirq(d)));
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}
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static void gpio_rcar_irq_enable(struct irq_data *d)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct gpio_rcar_priv *p = gpiochip_get_data(gc);
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gpio_rcar_write(p, MSKCLR, BIT(irqd_to_hwirq(d)));
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}
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static void gpio_rcar_config_interrupt_input_mode(struct gpio_rcar_priv *p,
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unsigned int hwirq,
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bool active_high_rising_edge,
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bool level_trigger,
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bool both)
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{
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unsigned long flags;
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/* follow steps in the GPIO documentation for
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* "Setting Edge-Sensitive Interrupt Input Mode" and
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* "Setting Level-Sensitive Interrupt Input Mode"
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*/
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spin_lock_irqsave(&p->lock, flags);
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/* Configure postive or negative logic in POSNEG */
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gpio_rcar_modify_bit(p, POSNEG, hwirq, !active_high_rising_edge);
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/* Configure edge or level trigger in EDGLEVEL */
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gpio_rcar_modify_bit(p, EDGLEVEL, hwirq, !level_trigger);
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/* Select one edge or both edges in BOTHEDGE */
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if (p->has_both_edge_trigger)
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gpio_rcar_modify_bit(p, BOTHEDGE, hwirq, both);
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/* Select "Interrupt Input Mode" in IOINTSEL */
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gpio_rcar_modify_bit(p, IOINTSEL, hwirq, true);
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/* Write INTCLR in case of edge trigger */
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if (!level_trigger)
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gpio_rcar_write(p, INTCLR, BIT(hwirq));
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spin_unlock_irqrestore(&p->lock, flags);
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}
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static int gpio_rcar_irq_set_type(struct irq_data *d, unsigned int type)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct gpio_rcar_priv *p = gpiochip_get_data(gc);
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unsigned int hwirq = irqd_to_hwirq(d);
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dev_dbg(&p->pdev->dev, "sense irq = %d, type = %d\n", hwirq, type);
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switch (type & IRQ_TYPE_SENSE_MASK) {
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case IRQ_TYPE_LEVEL_HIGH:
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gpio_rcar_config_interrupt_input_mode(p, hwirq, true, true,
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false);
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break;
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case IRQ_TYPE_LEVEL_LOW:
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gpio_rcar_config_interrupt_input_mode(p, hwirq, false, true,
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false);
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break;
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case IRQ_TYPE_EDGE_RISING:
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gpio_rcar_config_interrupt_input_mode(p, hwirq, true, false,
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false);
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break;
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case IRQ_TYPE_EDGE_FALLING:
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gpio_rcar_config_interrupt_input_mode(p, hwirq, false, false,
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false);
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break;
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case IRQ_TYPE_EDGE_BOTH:
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if (!p->has_both_edge_trigger)
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return -EINVAL;
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gpio_rcar_config_interrupt_input_mode(p, hwirq, true, false,
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true);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int gpio_rcar_irq_set_wake(struct irq_data *d, unsigned int on)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct gpio_rcar_priv *p = gpiochip_get_data(gc);
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int error;
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if (p->irq_parent) {
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error = irq_set_irq_wake(p->irq_parent, on);
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if (error) {
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dev_dbg(&p->pdev->dev,
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"irq %u doesn't support irq_set_wake\n",
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p->irq_parent);
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p->irq_parent = 0;
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}
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}
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if (!p->clk)
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return 0;
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if (on)
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clk_enable(p->clk);
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else
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clk_disable(p->clk);
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return 0;
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}
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static irqreturn_t gpio_rcar_irq_handler(int irq, void *dev_id)
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{
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struct gpio_rcar_priv *p = dev_id;
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u32 pending;
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unsigned int offset, irqs_handled = 0;
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while ((pending = gpio_rcar_read(p, INTDT) &
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gpio_rcar_read(p, INTMSK))) {
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offset = __ffs(pending);
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gpio_rcar_write(p, INTCLR, BIT(offset));
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generic_handle_irq(irq_find_mapping(p->gpio_chip.irqdomain,
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offset));
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irqs_handled++;
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}
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return irqs_handled ? IRQ_HANDLED : IRQ_NONE;
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}
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static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip,
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unsigned int gpio,
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bool output)
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{
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struct gpio_rcar_priv *p = gpiochip_get_data(chip);
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unsigned long flags;
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/* follow steps in the GPIO documentation for
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* "Setting General Output Mode" and
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* "Setting General Input Mode"
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*/
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spin_lock_irqsave(&p->lock, flags);
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/* Configure postive logic in POSNEG */
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gpio_rcar_modify_bit(p, POSNEG, gpio, false);
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/* Select "General Input/Output Mode" in IOINTSEL */
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gpio_rcar_modify_bit(p, IOINTSEL, gpio, false);
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/* Select Input Mode or Output Mode in INOUTSEL */
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gpio_rcar_modify_bit(p, INOUTSEL, gpio, output);
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spin_unlock_irqrestore(&p->lock, flags);
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}
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static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset)
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{
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return pinctrl_request_gpio(chip->base + offset);
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}
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static void gpio_rcar_free(struct gpio_chip *chip, unsigned offset)
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{
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pinctrl_free_gpio(chip->base + offset);
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/*
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* Set the GPIO as an input to ensure that the next GPIO request won't
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* drive the GPIO pin as an output.
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*/
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gpio_rcar_config_general_input_output_mode(chip, offset, false);
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}
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static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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gpio_rcar_config_general_input_output_mode(chip, offset, false);
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return 0;
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}
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static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
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{
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u32 bit = BIT(offset);
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/* testing on r8a7790 shows that INDT does not show correct pin state
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* when configured as output, so use OUTDT in case of output pins */
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if (gpio_rcar_read(gpiochip_get_data(chip), INOUTSEL) & bit)
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return !!(gpio_rcar_read(gpiochip_get_data(chip), OUTDT) & bit);
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else
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return !!(gpio_rcar_read(gpiochip_get_data(chip), INDT) & bit);
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}
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static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)
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{
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struct gpio_rcar_priv *p = gpiochip_get_data(chip);
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unsigned long flags;
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spin_lock_irqsave(&p->lock, flags);
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gpio_rcar_modify_bit(p, OUTDT, offset, value);
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spin_unlock_irqrestore(&p->lock, flags);
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}
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static void gpio_rcar_set_multiple(struct gpio_chip *chip, unsigned long *mask,
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unsigned long *bits)
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{
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struct gpio_rcar_priv *p = gpiochip_get_data(chip);
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unsigned long flags;
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u32 val, bankmask;
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bankmask = mask[0] & GENMASK(chip->ngpio - 1, 0);
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if (!bankmask)
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return;
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spin_lock_irqsave(&p->lock, flags);
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val = gpio_rcar_read(p, OUTDT);
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val &= ~bankmask;
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val |= (bankmask & bits[0]);
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gpio_rcar_write(p, OUTDT, val);
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spin_unlock_irqrestore(&p->lock, flags);
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}
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static int gpio_rcar_direction_output(struct gpio_chip *chip, unsigned offset,
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int value)
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{
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/* write GPIO value to output before selecting output mode of pin */
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gpio_rcar_set(chip, offset, value);
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gpio_rcar_config_general_input_output_mode(chip, offset, true);
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return 0;
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}
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struct gpio_rcar_info {
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bool has_both_edge_trigger;
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bool needs_clk;
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};
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static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
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.has_both_edge_trigger = false,
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.needs_clk = false,
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};
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static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
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.has_both_edge_trigger = true,
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.needs_clk = true,
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};
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static const struct of_device_id gpio_rcar_of_table[] = {
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{
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.compatible = "renesas,gpio-r8a7790",
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.data = &gpio_rcar_info_gen2,
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}, {
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.compatible = "renesas,gpio-r8a7791",
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.data = &gpio_rcar_info_gen2,
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}, {
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.compatible = "renesas,gpio-r8a7793",
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.data = &gpio_rcar_info_gen2,
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}, {
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.compatible = "renesas,gpio-r8a7794",
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.data = &gpio_rcar_info_gen2,
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}, {
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.compatible = "renesas,gpio-r8a7795",
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/* Gen3 GPIO is identical to Gen2. */
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.data = &gpio_rcar_info_gen2,
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}, {
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.compatible = "renesas,gpio-rcar",
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.data = &gpio_rcar_info_gen1,
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}, {
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/* Terminator */
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},
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};
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|
|
MODULE_DEVICE_TABLE(of, gpio_rcar_of_table);
|
|
|
|
static int gpio_rcar_parse_dt(struct gpio_rcar_priv *p, unsigned int *npins)
|
|
{
|
|
struct device_node *np = p->pdev->dev.of_node;
|
|
const struct of_device_id *match;
|
|
const struct gpio_rcar_info *info;
|
|
struct of_phandle_args args;
|
|
int ret;
|
|
|
|
match = of_match_node(gpio_rcar_of_table, np);
|
|
if (!match)
|
|
return -EINVAL;
|
|
|
|
info = match->data;
|
|
|
|
ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &args);
|
|
*npins = ret == 0 ? args.args[2] : RCAR_MAX_GPIO_PER_BANK;
|
|
p->has_both_edge_trigger = info->has_both_edge_trigger;
|
|
p->needs_clk = info->needs_clk;
|
|
|
|
if (*npins == 0 || *npins > RCAR_MAX_GPIO_PER_BANK) {
|
|
dev_warn(&p->pdev->dev,
|
|
"Invalid number of gpio lines %u, using %u\n", *npins,
|
|
RCAR_MAX_GPIO_PER_BANK);
|
|
*npins = RCAR_MAX_GPIO_PER_BANK;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_rcar_probe(struct platform_device *pdev)
|
|
{
|
|
struct gpio_rcar_priv *p;
|
|
struct resource *io, *irq;
|
|
struct gpio_chip *gpio_chip;
|
|
struct irq_chip *irq_chip;
|
|
struct device *dev = &pdev->dev;
|
|
const char *name = dev_name(dev);
|
|
unsigned int npins;
|
|
int ret;
|
|
|
|
p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
p->pdev = pdev;
|
|
spin_lock_init(&p->lock);
|
|
|
|
/* Get device configuration from DT node */
|
|
ret = gpio_rcar_parse_dt(p, &npins);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
platform_set_drvdata(pdev, p);
|
|
|
|
p->clk = devm_clk_get(dev, NULL);
|
|
if (IS_ERR(p->clk)) {
|
|
if (p->needs_clk) {
|
|
dev_err(dev, "unable to get clock\n");
|
|
ret = PTR_ERR(p->clk);
|
|
goto err0;
|
|
}
|
|
p->clk = NULL;
|
|
}
|
|
|
|
pm_runtime_enable(dev);
|
|
pm_runtime_get_sync(dev);
|
|
|
|
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
|
|
if (!io || !irq) {
|
|
dev_err(dev, "missing IRQ or IOMEM\n");
|
|
ret = -EINVAL;
|
|
goto err0;
|
|
}
|
|
|
|
p->base = devm_ioremap_nocache(dev, io->start, resource_size(io));
|
|
if (!p->base) {
|
|
dev_err(dev, "failed to remap I/O memory\n");
|
|
ret = -ENXIO;
|
|
goto err0;
|
|
}
|
|
|
|
gpio_chip = &p->gpio_chip;
|
|
gpio_chip->request = gpio_rcar_request;
|
|
gpio_chip->free = gpio_rcar_free;
|
|
gpio_chip->direction_input = gpio_rcar_direction_input;
|
|
gpio_chip->get = gpio_rcar_get;
|
|
gpio_chip->direction_output = gpio_rcar_direction_output;
|
|
gpio_chip->set = gpio_rcar_set;
|
|
gpio_chip->set_multiple = gpio_rcar_set_multiple;
|
|
gpio_chip->label = name;
|
|
gpio_chip->parent = dev;
|
|
gpio_chip->owner = THIS_MODULE;
|
|
gpio_chip->base = -1;
|
|
gpio_chip->ngpio = npins;
|
|
|
|
irq_chip = &p->irq_chip;
|
|
irq_chip->name = name;
|
|
irq_chip->irq_mask = gpio_rcar_irq_disable;
|
|
irq_chip->irq_unmask = gpio_rcar_irq_enable;
|
|
irq_chip->irq_set_type = gpio_rcar_irq_set_type;
|
|
irq_chip->irq_set_wake = gpio_rcar_irq_set_wake;
|
|
irq_chip->flags = IRQCHIP_SET_TYPE_MASKED | IRQCHIP_MASK_ON_SUSPEND;
|
|
|
|
ret = gpiochip_add_data(gpio_chip, p);
|
|
if (ret) {
|
|
dev_err(dev, "failed to add GPIO controller\n");
|
|
goto err0;
|
|
}
|
|
|
|
ret = gpiochip_irqchip_add(gpio_chip, irq_chip, 0, handle_level_irq,
|
|
IRQ_TYPE_NONE);
|
|
if (ret) {
|
|
dev_err(dev, "cannot add irqchip\n");
|
|
goto err1;
|
|
}
|
|
|
|
p->irq_parent = irq->start;
|
|
if (devm_request_irq(dev, irq->start, gpio_rcar_irq_handler,
|
|
IRQF_SHARED, name, p)) {
|
|
dev_err(dev, "failed to request IRQ\n");
|
|
ret = -ENOENT;
|
|
goto err1;
|
|
}
|
|
|
|
dev_info(dev, "driving %d GPIOs\n", npins);
|
|
|
|
return 0;
|
|
|
|
err1:
|
|
gpiochip_remove(gpio_chip);
|
|
err0:
|
|
pm_runtime_put(dev);
|
|
pm_runtime_disable(dev);
|
|
return ret;
|
|
}
|
|
|
|
static int gpio_rcar_remove(struct platform_device *pdev)
|
|
{
|
|
struct gpio_rcar_priv *p = platform_get_drvdata(pdev);
|
|
|
|
gpiochip_remove(&p->gpio_chip);
|
|
|
|
pm_runtime_put(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver gpio_rcar_device_driver = {
|
|
.probe = gpio_rcar_probe,
|
|
.remove = gpio_rcar_remove,
|
|
.driver = {
|
|
.name = "gpio_rcar",
|
|
.of_match_table = of_match_ptr(gpio_rcar_of_table),
|
|
}
|
|
};
|
|
|
|
module_platform_driver(gpio_rcar_device_driver);
|
|
|
|
MODULE_AUTHOR("Magnus Damm");
|
|
MODULE_DESCRIPTION("Renesas R-Car GPIO Driver");
|
|
MODULE_LICENSE("GPL v2");
|