v4.19.13 snapshot.
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
new file mode 100644
index 0000000..6e02148
--- /dev/null
+++ b/drivers/gpio/gpio-mvebu.c
@@ -0,0 +1,1272 @@
+/*
+ * GPIO driver for Marvell SoCs
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ * Andrew Lunn <andrew@lunn.ch>
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * This driver is a fairly straightforward GPIO driver for the
+ * complete family of Marvell EBU SoC platforms (Orion, Dove,
+ * Kirkwood, Discovery, Armada 370/XP). The only complexity of this
+ * driver is the different register layout that exists between the
+ * non-SMP platforms (Orion, Dove, Kirkwood, Armada 370) and the SMP
+ * platforms (MV78200 from the Discovery family and the Armada
+ * XP). Therefore, this driver handles three variants of the GPIO
+ * block:
+ * - the basic variant, called "orion-gpio", with the simplest
+ * register set. Used on Orion, Dove, Kirkwoord, Armada 370 and
+ * non-SMP Discovery systems
+ * - the mv78200 variant for MV78200 Discovery systems. This variant
+ * turns the edge mask and level mask registers into CPU0 edge
+ * mask/level mask registers, and adds CPU1 edge mask/level mask
+ * registers.
+ * - the armadaxp variant for Armada XP systems. This variant keeps
+ * the normal cause/edge mask/level mask registers when the global
+ * interrupts are used, but adds per-CPU cause/edge mask/level mask
+ * registers n a separate memory area for the per-CPU GPIO
+ * interrupts.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+/*
+ * GPIO unit register offsets.
+ */
+#define GPIO_OUT_OFF 0x0000
+#define GPIO_IO_CONF_OFF 0x0004
+#define GPIO_BLINK_EN_OFF 0x0008
+#define GPIO_IN_POL_OFF 0x000c
+#define GPIO_DATA_IN_OFF 0x0010
+#define GPIO_EDGE_CAUSE_OFF 0x0014
+#define GPIO_EDGE_MASK_OFF 0x0018
+#define GPIO_LEVEL_MASK_OFF 0x001c
+#define GPIO_BLINK_CNT_SELECT_OFF 0x0020
+
+/*
+ * PWM register offsets.
+ */
+#define PWM_BLINK_ON_DURATION_OFF 0x0
+#define PWM_BLINK_OFF_DURATION_OFF 0x4
+
+
+/* The MV78200 has per-CPU registers for edge mask and level mask */
+#define GPIO_EDGE_MASK_MV78200_OFF(cpu) ((cpu) ? 0x30 : 0x18)
+#define GPIO_LEVEL_MASK_MV78200_OFF(cpu) ((cpu) ? 0x34 : 0x1C)
+
+/*
+ * The Armada XP has per-CPU registers for interrupt cause, interrupt
+ * mask and interrupt level mask. Those are relative to the
+ * percpu_membase.
+ */
+#define GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu) ((cpu) * 0x4)
+#define GPIO_EDGE_MASK_ARMADAXP_OFF(cpu) (0x10 + (cpu) * 0x4)
+#define GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu) (0x20 + (cpu) * 0x4)
+
+#define MVEBU_GPIO_SOC_VARIANT_ORION 0x1
+#define MVEBU_GPIO_SOC_VARIANT_MV78200 0x2
+#define MVEBU_GPIO_SOC_VARIANT_ARMADAXP 0x3
+#define MVEBU_GPIO_SOC_VARIANT_A8K 0x4
+
+#define MVEBU_MAX_GPIO_PER_BANK 32
+
+struct mvebu_pwm {
+ void __iomem *membase;
+ unsigned long clk_rate;
+ struct gpio_desc *gpiod;
+ struct pwm_chip chip;
+ spinlock_t lock;
+ struct mvebu_gpio_chip *mvchip;
+
+ /* Used to preserve GPIO/PWM registers across suspend/resume */
+ u32 blink_select;
+ u32 blink_on_duration;
+ u32 blink_off_duration;
+};
+
+struct mvebu_gpio_chip {
+ struct gpio_chip chip;
+ struct regmap *regs;
+ u32 offset;
+ struct regmap *percpu_regs;
+ int irqbase;
+ struct irq_domain *domain;
+ int soc_variant;
+
+ /* Used for PWM support */
+ struct clk *clk;
+ struct mvebu_pwm *mvpwm;
+
+ /* Used to preserve GPIO registers across suspend/resume */
+ u32 out_reg;
+ u32 io_conf_reg;
+ u32 blink_en_reg;
+ u32 in_pol_reg;
+ u32 edge_mask_regs[4];
+ u32 level_mask_regs[4];
+};
+
+/*
+ * Functions returning addresses of individual registers for a given
+ * GPIO controller.
+ */
+
+static void mvebu_gpioreg_edge_cause(struct mvebu_gpio_chip *mvchip,
+ struct regmap **map, unsigned int *offset)
+{
+ int cpu;
+
+ switch (mvchip->soc_variant) {
+ case MVEBU_GPIO_SOC_VARIANT_ORION:
+ case MVEBU_GPIO_SOC_VARIANT_MV78200:
+ case MVEBU_GPIO_SOC_VARIANT_A8K:
+ *map = mvchip->regs;
+ *offset = GPIO_EDGE_CAUSE_OFF + mvchip->offset;
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+ cpu = smp_processor_id();
+ *map = mvchip->percpu_regs;
+ *offset = GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static u32
+mvebu_gpio_read_edge_cause(struct mvebu_gpio_chip *mvchip)
+{
+ struct regmap *map;
+ unsigned int offset;
+ u32 val;
+
+ mvebu_gpioreg_edge_cause(mvchip, &map, &offset);
+ regmap_read(map, offset, &val);
+
+ return val;
+}
+
+static void
+mvebu_gpio_write_edge_cause(struct mvebu_gpio_chip *mvchip, u32 val)
+{
+ struct regmap *map;
+ unsigned int offset;
+
+ mvebu_gpioreg_edge_cause(mvchip, &map, &offset);
+ regmap_write(map, offset, val);
+}
+
+static inline void
+mvebu_gpioreg_edge_mask(struct mvebu_gpio_chip *mvchip,
+ struct regmap **map, unsigned int *offset)
+{
+ int cpu;
+
+ switch (mvchip->soc_variant) {
+ case MVEBU_GPIO_SOC_VARIANT_ORION:
+ case MVEBU_GPIO_SOC_VARIANT_A8K:
+ *map = mvchip->regs;
+ *offset = GPIO_EDGE_MASK_OFF + mvchip->offset;
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_MV78200:
+ cpu = smp_processor_id();
+ *map = mvchip->regs;
+ *offset = GPIO_EDGE_MASK_MV78200_OFF(cpu);
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+ cpu = smp_processor_id();
+ *map = mvchip->percpu_regs;
+ *offset = GPIO_EDGE_MASK_ARMADAXP_OFF(cpu);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static u32
+mvebu_gpio_read_edge_mask(struct mvebu_gpio_chip *mvchip)
+{
+ struct regmap *map;
+ unsigned int offset;
+ u32 val;
+
+ mvebu_gpioreg_edge_mask(mvchip, &map, &offset);
+ regmap_read(map, offset, &val);
+
+ return val;
+}
+
+static void
+mvebu_gpio_write_edge_mask(struct mvebu_gpio_chip *mvchip, u32 val)
+{
+ struct regmap *map;
+ unsigned int offset;
+
+ mvebu_gpioreg_edge_mask(mvchip, &map, &offset);
+ regmap_write(map, offset, val);
+}
+
+static void
+mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip,
+ struct regmap **map, unsigned int *offset)
+{
+ int cpu;
+
+ switch (mvchip->soc_variant) {
+ case MVEBU_GPIO_SOC_VARIANT_ORION:
+ case MVEBU_GPIO_SOC_VARIANT_A8K:
+ *map = mvchip->regs;
+ *offset = GPIO_LEVEL_MASK_OFF + mvchip->offset;
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_MV78200:
+ cpu = smp_processor_id();
+ *map = mvchip->regs;
+ *offset = GPIO_LEVEL_MASK_MV78200_OFF(cpu);
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+ cpu = smp_processor_id();
+ *map = mvchip->percpu_regs;
+ *offset = GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static u32
+mvebu_gpio_read_level_mask(struct mvebu_gpio_chip *mvchip)
+{
+ struct regmap *map;
+ unsigned int offset;
+ u32 val;
+
+ mvebu_gpioreg_level_mask(mvchip, &map, &offset);
+ regmap_read(map, offset, &val);
+
+ return val;
+}
+
+static void
+mvebu_gpio_write_level_mask(struct mvebu_gpio_chip *mvchip, u32 val)
+{
+ struct regmap *map;
+ unsigned int offset;
+
+ mvebu_gpioreg_level_mask(mvchip, &map, &offset);
+ regmap_write(map, offset, val);
+}
+
+/*
+ * Functions returning addresses of individual registers for a given
+ * PWM controller.
+ */
+static void __iomem *mvebu_pwmreg_blink_on_duration(struct mvebu_pwm *mvpwm)
+{
+ return mvpwm->membase + PWM_BLINK_ON_DURATION_OFF;
+}
+
+static void __iomem *mvebu_pwmreg_blink_off_duration(struct mvebu_pwm *mvpwm)
+{
+ return mvpwm->membase + PWM_BLINK_OFF_DURATION_OFF;
+}
+
+/*
+ * Functions implementing the gpio_chip methods
+ */
+static void mvebu_gpio_set(struct gpio_chip *chip, unsigned int pin, int value)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+
+ regmap_update_bits(mvchip->regs, GPIO_OUT_OFF + mvchip->offset,
+ BIT(pin), value ? BIT(pin) : 0);
+}
+
+static int mvebu_gpio_get(struct gpio_chip *chip, unsigned int pin)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+ u32 u;
+
+ regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &u);
+
+ if (u & BIT(pin)) {
+ u32 data_in, in_pol;
+
+ regmap_read(mvchip->regs, GPIO_DATA_IN_OFF + mvchip->offset,
+ &data_in);
+ regmap_read(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset,
+ &in_pol);
+ u = data_in ^ in_pol;
+ } else {
+ regmap_read(mvchip->regs, GPIO_OUT_OFF + mvchip->offset, &u);
+ }
+
+ return (u >> pin) & 1;
+}
+
+static void mvebu_gpio_blink(struct gpio_chip *chip, unsigned int pin,
+ int value)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+
+ regmap_update_bits(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset,
+ BIT(pin), value ? BIT(pin) : 0);
+}
+
+static int mvebu_gpio_direction_input(struct gpio_chip *chip, unsigned int pin)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+ int ret;
+
+ /*
+ * Check with the pinctrl driver whether this pin is usable as
+ * an input GPIO
+ */
+ ret = pinctrl_gpio_direction_input(chip->base + pin);
+ if (ret)
+ return ret;
+
+ regmap_update_bits(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
+ BIT(pin), BIT(pin));
+
+ return 0;
+}
+
+static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned int pin,
+ int value)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+ int ret;
+
+ /*
+ * Check with the pinctrl driver whether this pin is usable as
+ * an output GPIO
+ */
+ ret = pinctrl_gpio_direction_output(chip->base + pin);
+ if (ret)
+ return ret;
+
+ mvebu_gpio_blink(chip, pin, 0);
+ mvebu_gpio_set(chip, pin, value);
+
+ regmap_update_bits(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
+ BIT(pin), 0);
+
+ return 0;
+}
+
+static int mvebu_gpio_to_irq(struct gpio_chip *chip, unsigned int pin)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+
+ return irq_create_mapping(mvchip->domain, pin);
+}
+
+/*
+ * Functions implementing the irq_chip methods
+ */
+static void mvebu_gpio_irq_ack(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct mvebu_gpio_chip *mvchip = gc->private;
+ u32 mask = d->mask;
+
+ irq_gc_lock(gc);
+ mvebu_gpio_write_edge_cause(mvchip, ~mask);
+ irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_edge_irq_mask(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct mvebu_gpio_chip *mvchip = gc->private;
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
+
+ irq_gc_lock(gc);
+ ct->mask_cache_priv &= ~mask;
+ mvebu_gpio_write_edge_mask(mvchip, ct->mask_cache_priv);
+ irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_edge_irq_unmask(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct mvebu_gpio_chip *mvchip = gc->private;
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
+
+ irq_gc_lock(gc);
+ ct->mask_cache_priv |= mask;
+ mvebu_gpio_write_edge_mask(mvchip, ct->mask_cache_priv);
+ irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_level_irq_mask(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct mvebu_gpio_chip *mvchip = gc->private;
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
+
+ irq_gc_lock(gc);
+ ct->mask_cache_priv &= ~mask;
+ mvebu_gpio_write_level_mask(mvchip, ct->mask_cache_priv);
+ irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_level_irq_unmask(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct mvebu_gpio_chip *mvchip = gc->private;
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ u32 mask = d->mask;
+
+ irq_gc_lock(gc);
+ ct->mask_cache_priv |= mask;
+ mvebu_gpio_write_level_mask(mvchip, ct->mask_cache_priv);
+ irq_gc_unlock(gc);
+}
+
+/*****************************************************************************
+ * MVEBU GPIO IRQ
+ *
+ * GPIO_IN_POL register controls whether GPIO_DATA_IN will hold the same
+ * value of the line or the opposite value.
+ *
+ * Level IRQ handlers: DATA_IN is used directly as cause register.
+ * Interrupt are masked by LEVEL_MASK registers.
+ * Edge IRQ handlers: Change in DATA_IN are latched in EDGE_CAUSE.
+ * Interrupt are masked by EDGE_MASK registers.
+ * Both-edge handlers: Similar to regular Edge handlers, but also swaps
+ * the polarity to catch the next line transaction.
+ * This is a race condition that might not perfectly
+ * work on some use cases.
+ *
+ * Every eight GPIO lines are grouped (OR'ed) before going up to main
+ * cause register.
+ *
+ * EDGE cause mask
+ * data-in /--------| |-----| |----\
+ * -----| |----- ---- to main cause reg
+ * X \----------------| |----/
+ * polarity LEVEL mask
+ *
+ ****************************************************************************/
+
+static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ struct mvebu_gpio_chip *mvchip = gc->private;
+ int pin;
+ u32 u;
+
+ pin = d->hwirq;
+
+ regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &u);
+ if ((u & BIT(pin)) == 0)
+ return -EINVAL;
+
+ type &= IRQ_TYPE_SENSE_MASK;
+ if (type == IRQ_TYPE_NONE)
+ return -EINVAL;
+
+ /* Check if we need to change chip and handler */
+ if (!(ct->type & type))
+ if (irq_setup_alt_chip(d, type))
+ return -EINVAL;
+
+ /*
+ * Configure interrupt polarity.
+ */
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ case IRQ_TYPE_LEVEL_HIGH:
+ regmap_update_bits(mvchip->regs,
+ GPIO_IN_POL_OFF + mvchip->offset,
+ BIT(pin), 0);
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ case IRQ_TYPE_LEVEL_LOW:
+ regmap_update_bits(mvchip->regs,
+ GPIO_IN_POL_OFF + mvchip->offset,
+ BIT(pin), BIT(pin));
+ break;
+ case IRQ_TYPE_EDGE_BOTH: {
+ u32 data_in, in_pol, val;
+
+ regmap_read(mvchip->regs,
+ GPIO_IN_POL_OFF + mvchip->offset, &in_pol);
+ regmap_read(mvchip->regs,
+ GPIO_DATA_IN_OFF + mvchip->offset, &data_in);
+
+ /*
+ * set initial polarity based on current input level
+ */
+ if ((data_in ^ in_pol) & BIT(pin))
+ val = BIT(pin); /* falling */
+ else
+ val = 0; /* raising */
+
+ regmap_update_bits(mvchip->regs,
+ GPIO_IN_POL_OFF + mvchip->offset,
+ BIT(pin), val);
+ break;
+ }
+ }
+ return 0;
+}
+
+static void mvebu_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct mvebu_gpio_chip *mvchip = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ u32 cause, type, data_in, level_mask, edge_cause, edge_mask;
+ int i;
+
+ if (mvchip == NULL)
+ return;
+
+ chained_irq_enter(chip, desc);
+
+ regmap_read(mvchip->regs, GPIO_DATA_IN_OFF + mvchip->offset, &data_in);
+ level_mask = mvebu_gpio_read_level_mask(mvchip);
+ edge_cause = mvebu_gpio_read_edge_cause(mvchip);
+ edge_mask = mvebu_gpio_read_edge_mask(mvchip);
+
+ cause = (data_in & level_mask) | (edge_cause & edge_mask);
+
+ for (i = 0; i < mvchip->chip.ngpio; i++) {
+ int irq;
+
+ irq = irq_find_mapping(mvchip->domain, i);
+
+ if (!(cause & BIT(i)))
+ continue;
+
+ type = irq_get_trigger_type(irq);
+ if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
+ /* Swap polarity (race with GPIO line) */
+ u32 polarity;
+
+ regmap_read(mvchip->regs,
+ GPIO_IN_POL_OFF + mvchip->offset,
+ &polarity);
+ polarity ^= BIT(i);
+ regmap_write(mvchip->regs,
+ GPIO_IN_POL_OFF + mvchip->offset,
+ polarity);
+ }
+
+ generic_handle_irq(irq);
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+/*
+ * Functions implementing the pwm_chip methods
+ */
+static struct mvebu_pwm *to_mvebu_pwm(struct pwm_chip *chip)
+{
+ return container_of(chip, struct mvebu_pwm, chip);
+}
+
+static int mvebu_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
+ struct mvebu_gpio_chip *mvchip = mvpwm->mvchip;
+ struct gpio_desc *desc;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&mvpwm->lock, flags);
+
+ if (mvpwm->gpiod) {
+ ret = -EBUSY;
+ } else {
+ desc = gpiochip_request_own_desc(&mvchip->chip,
+ pwm->hwpwm, "mvebu-pwm");
+ if (IS_ERR(desc)) {
+ ret = PTR_ERR(desc);
+ goto out;
+ }
+
+ ret = gpiod_direction_output(desc, 0);
+ if (ret) {
+ gpiochip_free_own_desc(desc);
+ goto out;
+ }
+
+ mvpwm->gpiod = desc;
+ }
+out:
+ spin_unlock_irqrestore(&mvpwm->lock, flags);
+ return ret;
+}
+
+static void mvebu_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
+ unsigned long flags;
+
+ spin_lock_irqsave(&mvpwm->lock, flags);
+ gpiochip_free_own_desc(mvpwm->gpiod);
+ mvpwm->gpiod = NULL;
+ spin_unlock_irqrestore(&mvpwm->lock, flags);
+}
+
+static void mvebu_pwm_get_state(struct pwm_chip *chip,
+ struct pwm_device *pwm,
+ struct pwm_state *state) {
+
+ struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
+ struct mvebu_gpio_chip *mvchip = mvpwm->mvchip;
+ unsigned long long val;
+ unsigned long flags;
+ u32 u;
+
+ spin_lock_irqsave(&mvpwm->lock, flags);
+
+ val = (unsigned long long)
+ readl_relaxed(mvebu_pwmreg_blink_on_duration(mvpwm));
+ val *= NSEC_PER_SEC;
+ do_div(val, mvpwm->clk_rate);
+ if (val > UINT_MAX)
+ state->duty_cycle = UINT_MAX;
+ else if (val)
+ state->duty_cycle = val;
+ else
+ state->duty_cycle = 1;
+
+ val = (unsigned long long)
+ readl_relaxed(mvebu_pwmreg_blink_off_duration(mvpwm));
+ val *= NSEC_PER_SEC;
+ do_div(val, mvpwm->clk_rate);
+ if (val < state->duty_cycle) {
+ state->period = 1;
+ } else {
+ val -= state->duty_cycle;
+ if (val > UINT_MAX)
+ state->period = UINT_MAX;
+ else if (val)
+ state->period = val;
+ else
+ state->period = 1;
+ }
+
+ regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset, &u);
+ if (u)
+ state->enabled = true;
+ else
+ state->enabled = false;
+
+ spin_unlock_irqrestore(&mvpwm->lock, flags);
+}
+
+static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
+ struct mvebu_gpio_chip *mvchip = mvpwm->mvchip;
+ unsigned long long val;
+ unsigned long flags;
+ unsigned int on, off;
+
+ val = (unsigned long long) mvpwm->clk_rate * state->duty_cycle;
+ do_div(val, NSEC_PER_SEC);
+ if (val > UINT_MAX)
+ return -EINVAL;
+ if (val)
+ on = val;
+ else
+ on = 1;
+
+ val = (unsigned long long) mvpwm->clk_rate *
+ (state->period - state->duty_cycle);
+ do_div(val, NSEC_PER_SEC);
+ if (val > UINT_MAX)
+ return -EINVAL;
+ if (val)
+ off = val;
+ else
+ off = 1;
+
+ spin_lock_irqsave(&mvpwm->lock, flags);
+
+ writel_relaxed(on, mvebu_pwmreg_blink_on_duration(mvpwm));
+ writel_relaxed(off, mvebu_pwmreg_blink_off_duration(mvpwm));
+ if (state->enabled)
+ mvebu_gpio_blink(&mvchip->chip, pwm->hwpwm, 1);
+ else
+ mvebu_gpio_blink(&mvchip->chip, pwm->hwpwm, 0);
+
+ spin_unlock_irqrestore(&mvpwm->lock, flags);
+
+ return 0;
+}
+
+static const struct pwm_ops mvebu_pwm_ops = {
+ .request = mvebu_pwm_request,
+ .free = mvebu_pwm_free,
+ .get_state = mvebu_pwm_get_state,
+ .apply = mvebu_pwm_apply,
+ .owner = THIS_MODULE,
+};
+
+static void __maybe_unused mvebu_pwm_suspend(struct mvebu_gpio_chip *mvchip)
+{
+ struct mvebu_pwm *mvpwm = mvchip->mvpwm;
+
+ regmap_read(mvchip->regs, GPIO_BLINK_CNT_SELECT_OFF + mvchip->offset,
+ &mvpwm->blink_select);
+ mvpwm->blink_on_duration =
+ readl_relaxed(mvebu_pwmreg_blink_on_duration(mvpwm));
+ mvpwm->blink_off_duration =
+ readl_relaxed(mvebu_pwmreg_blink_off_duration(mvpwm));
+}
+
+static void __maybe_unused mvebu_pwm_resume(struct mvebu_gpio_chip *mvchip)
+{
+ struct mvebu_pwm *mvpwm = mvchip->mvpwm;
+
+ regmap_write(mvchip->regs, GPIO_BLINK_CNT_SELECT_OFF + mvchip->offset,
+ mvpwm->blink_select);
+ writel_relaxed(mvpwm->blink_on_duration,
+ mvebu_pwmreg_blink_on_duration(mvpwm));
+ writel_relaxed(mvpwm->blink_off_duration,
+ mvebu_pwmreg_blink_off_duration(mvpwm));
+}
+
+static int mvebu_pwm_probe(struct platform_device *pdev,
+ struct mvebu_gpio_chip *mvchip,
+ int id)
+{
+ struct device *dev = &pdev->dev;
+ struct mvebu_pwm *mvpwm;
+ struct resource *res;
+ u32 set;
+
+ if (!of_device_is_compatible(mvchip->chip.of_node,
+ "marvell,armada-370-gpio"))
+ return 0;
+
+ if (IS_ERR(mvchip->clk))
+ return PTR_ERR(mvchip->clk);
+
+ /*
+ * There are only two sets of PWM configuration registers for
+ * all the GPIO lines on those SoCs which this driver reserves
+ * for the first two GPIO chips. So if the resource is missing
+ * we can't treat it as an error.
+ */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm");
+ if (!res)
+ return 0;
+
+ /*
+ * Use set A for lines of GPIO chip with id 0, B for GPIO chip
+ * with id 1. Don't allow further GPIO chips to be used for PWM.
+ */
+ if (id == 0)
+ set = 0;
+ else if (id == 1)
+ set = U32_MAX;
+ else
+ return -EINVAL;
+ regmap_write(mvchip->regs,
+ GPIO_BLINK_CNT_SELECT_OFF + mvchip->offset, set);
+
+ mvpwm = devm_kzalloc(dev, sizeof(struct mvebu_pwm), GFP_KERNEL);
+ if (!mvpwm)
+ return -ENOMEM;
+ mvchip->mvpwm = mvpwm;
+ mvpwm->mvchip = mvchip;
+
+ mvpwm->membase = devm_ioremap_resource(dev, res);
+ if (IS_ERR(mvpwm->membase))
+ return PTR_ERR(mvpwm->membase);
+
+ mvpwm->clk_rate = clk_get_rate(mvchip->clk);
+ if (!mvpwm->clk_rate) {
+ dev_err(dev, "failed to get clock rate\n");
+ return -EINVAL;
+ }
+
+ mvpwm->chip.dev = dev;
+ mvpwm->chip.ops = &mvebu_pwm_ops;
+ mvpwm->chip.npwm = mvchip->chip.ngpio;
+ /*
+ * There may already be some PWM allocated, so we can't force
+ * mvpwm->chip.base to a fixed point like mvchip->chip.base.
+ * So, we let pwmchip_add() do the numbering and take the next free
+ * region.
+ */
+ mvpwm->chip.base = -1;
+
+ spin_lock_init(&mvpwm->lock);
+
+ return pwmchip_add(&mvpwm->chip);
+}
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/seq_file.h>
+
+static void mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+ struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
+ u32 out, io_conf, blink, in_pol, data_in, cause, edg_msk, lvl_msk;
+ int i;
+
+ regmap_read(mvchip->regs, GPIO_OUT_OFF + mvchip->offset, &out);
+ regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &io_conf);
+ regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset, &blink);
+ regmap_read(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset, &in_pol);
+ regmap_read(mvchip->regs, GPIO_DATA_IN_OFF + mvchip->offset, &data_in);
+ cause = mvebu_gpio_read_edge_cause(mvchip);
+ edg_msk = mvebu_gpio_read_edge_mask(mvchip);
+ lvl_msk = mvebu_gpio_read_level_mask(mvchip);
+
+ for (i = 0; i < chip->ngpio; i++) {
+ const char *label;
+ u32 msk;
+ bool is_out;
+
+ label = gpiochip_is_requested(chip, i);
+ if (!label)
+ continue;
+
+ msk = BIT(i);
+ is_out = !(io_conf & msk);
+
+ seq_printf(s, " gpio-%-3d (%-20.20s)", chip->base + i, label);
+
+ if (is_out) {
+ seq_printf(s, " out %s %s\n",
+ out & msk ? "hi" : "lo",
+ blink & msk ? "(blink )" : "");
+ continue;
+ }
+
+ seq_printf(s, " in %s (act %s) - IRQ",
+ (data_in ^ in_pol) & msk ? "hi" : "lo",
+ in_pol & msk ? "lo" : "hi");
+ if (!((edg_msk | lvl_msk) & msk)) {
+ seq_puts(s, " disabled\n");
+ continue;
+ }
+ if (edg_msk & msk)
+ seq_puts(s, " edge ");
+ if (lvl_msk & msk)
+ seq_puts(s, " level");
+ seq_printf(s, " (%s)\n", cause & msk ? "pending" : "clear ");
+ }
+}
+#else
+#define mvebu_gpio_dbg_show NULL
+#endif
+
+static const struct of_device_id mvebu_gpio_of_match[] = {
+ {
+ .compatible = "marvell,orion-gpio",
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION,
+ },
+ {
+ .compatible = "marvell,mv78200-gpio",
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_MV78200,
+ },
+ {
+ .compatible = "marvell,armadaxp-gpio",
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_ARMADAXP,
+ },
+ {
+ .compatible = "marvell,armada-370-gpio",
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION,
+ },
+ {
+ .compatible = "marvell,armada-8k-gpio",
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_A8K,
+ },
+ {
+ /* sentinel */
+ },
+};
+
+static int mvebu_gpio_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
+ int i;
+
+ regmap_read(mvchip->regs, GPIO_OUT_OFF + mvchip->offset,
+ &mvchip->out_reg);
+ regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
+ &mvchip->io_conf_reg);
+ regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset,
+ &mvchip->blink_en_reg);
+ regmap_read(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset,
+ &mvchip->in_pol_reg);
+
+ switch (mvchip->soc_variant) {
+ case MVEBU_GPIO_SOC_VARIANT_ORION:
+ case MVEBU_GPIO_SOC_VARIANT_A8K:
+ regmap_read(mvchip->regs, GPIO_EDGE_MASK_OFF + mvchip->offset,
+ &mvchip->edge_mask_regs[0]);
+ regmap_read(mvchip->regs, GPIO_LEVEL_MASK_OFF + mvchip->offset,
+ &mvchip->level_mask_regs[0]);
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_MV78200:
+ for (i = 0; i < 2; i++) {
+ regmap_read(mvchip->regs,
+ GPIO_EDGE_MASK_MV78200_OFF(i),
+ &mvchip->edge_mask_regs[i]);
+ regmap_read(mvchip->regs,
+ GPIO_LEVEL_MASK_MV78200_OFF(i),
+ &mvchip->level_mask_regs[i]);
+ }
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+ for (i = 0; i < 4; i++) {
+ regmap_read(mvchip->regs,
+ GPIO_EDGE_MASK_ARMADAXP_OFF(i),
+ &mvchip->edge_mask_regs[i]);
+ regmap_read(mvchip->regs,
+ GPIO_LEVEL_MASK_ARMADAXP_OFF(i),
+ &mvchip->level_mask_regs[i]);
+ }
+ break;
+ default:
+ BUG();
+ }
+
+ if (IS_ENABLED(CONFIG_PWM))
+ mvebu_pwm_suspend(mvchip);
+
+ return 0;
+}
+
+static int mvebu_gpio_resume(struct platform_device *pdev)
+{
+ struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
+ int i;
+
+ regmap_write(mvchip->regs, GPIO_OUT_OFF + mvchip->offset,
+ mvchip->out_reg);
+ regmap_write(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
+ mvchip->io_conf_reg);
+ regmap_write(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset,
+ mvchip->blink_en_reg);
+ regmap_write(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset,
+ mvchip->in_pol_reg);
+
+ switch (mvchip->soc_variant) {
+ case MVEBU_GPIO_SOC_VARIANT_ORION:
+ case MVEBU_GPIO_SOC_VARIANT_A8K:
+ regmap_write(mvchip->regs, GPIO_EDGE_MASK_OFF + mvchip->offset,
+ mvchip->edge_mask_regs[0]);
+ regmap_write(mvchip->regs, GPIO_LEVEL_MASK_OFF + mvchip->offset,
+ mvchip->level_mask_regs[0]);
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_MV78200:
+ for (i = 0; i < 2; i++) {
+ regmap_write(mvchip->regs,
+ GPIO_EDGE_MASK_MV78200_OFF(i),
+ mvchip->edge_mask_regs[i]);
+ regmap_write(mvchip->regs,
+ GPIO_LEVEL_MASK_MV78200_OFF(i),
+ mvchip->level_mask_regs[i]);
+ }
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+ for (i = 0; i < 4; i++) {
+ regmap_write(mvchip->regs,
+ GPIO_EDGE_MASK_ARMADAXP_OFF(i),
+ mvchip->edge_mask_regs[i]);
+ regmap_write(mvchip->regs,
+ GPIO_LEVEL_MASK_ARMADAXP_OFF(i),
+ mvchip->level_mask_regs[i]);
+ }
+ break;
+ default:
+ BUG();
+ }
+
+ if (IS_ENABLED(CONFIG_PWM))
+ mvebu_pwm_resume(mvchip);
+
+ return 0;
+}
+
+static const struct regmap_config mvebu_gpio_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .fast_io = true,
+};
+
+static int mvebu_gpio_probe_raw(struct platform_device *pdev,
+ struct mvebu_gpio_chip *mvchip)
+{
+ struct resource *res;
+ void __iomem *base;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ mvchip->regs = devm_regmap_init_mmio(&pdev->dev, base,
+ &mvebu_gpio_regmap_config);
+ if (IS_ERR(mvchip->regs))
+ return PTR_ERR(mvchip->regs);
+
+ /*
+ * For the legacy SoCs, the regmap directly maps to the GPIO
+ * registers, so no offset is needed.
+ */
+ mvchip->offset = 0;
+
+ /*
+ * The Armada XP has a second range of registers for the
+ * per-CPU registers
+ */
+ if (mvchip->soc_variant == MVEBU_GPIO_SOC_VARIANT_ARMADAXP) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ mvchip->percpu_regs =
+ devm_regmap_init_mmio(&pdev->dev, base,
+ &mvebu_gpio_regmap_config);
+ if (IS_ERR(mvchip->percpu_regs))
+ return PTR_ERR(mvchip->percpu_regs);
+ }
+
+ return 0;
+}
+
+static int mvebu_gpio_probe_syscon(struct platform_device *pdev,
+ struct mvebu_gpio_chip *mvchip)
+{
+ mvchip->regs = syscon_node_to_regmap(pdev->dev.parent->of_node);
+ if (IS_ERR(mvchip->regs))
+ return PTR_ERR(mvchip->regs);
+
+ if (of_property_read_u32(pdev->dev.of_node, "offset", &mvchip->offset))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int mvebu_gpio_probe(struct platform_device *pdev)
+{
+ struct mvebu_gpio_chip *mvchip;
+ const struct of_device_id *match;
+ struct device_node *np = pdev->dev.of_node;
+ struct irq_chip_generic *gc;
+ struct irq_chip_type *ct;
+ unsigned int ngpios;
+ bool have_irqs;
+ int soc_variant;
+ int i, cpu, id;
+ int err;
+
+ match = of_match_device(mvebu_gpio_of_match, &pdev->dev);
+ if (match)
+ soc_variant = (unsigned long) match->data;
+ else
+ soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION;
+
+ /* Some gpio controllers do not provide irq support */
+ have_irqs = of_irq_count(np) != 0;
+
+ mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip),
+ GFP_KERNEL);
+ if (!mvchip)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, mvchip);
+
+ if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
+ dev_err(&pdev->dev, "Missing ngpios OF property\n");
+ return -ENODEV;
+ }
+
+ id = of_alias_get_id(pdev->dev.of_node, "gpio");
+ if (id < 0) {
+ dev_err(&pdev->dev, "Couldn't get OF id\n");
+ return id;
+ }
+
+ mvchip->clk = devm_clk_get(&pdev->dev, NULL);
+ /* Not all SoCs require a clock.*/
+ if (!IS_ERR(mvchip->clk))
+ clk_prepare_enable(mvchip->clk);
+
+ mvchip->soc_variant = soc_variant;
+ mvchip->chip.label = dev_name(&pdev->dev);
+ mvchip->chip.parent = &pdev->dev;
+ mvchip->chip.request = gpiochip_generic_request;
+ mvchip->chip.free = gpiochip_generic_free;
+ mvchip->chip.direction_input = mvebu_gpio_direction_input;
+ mvchip->chip.get = mvebu_gpio_get;
+ mvchip->chip.direction_output = mvebu_gpio_direction_output;
+ mvchip->chip.set = mvebu_gpio_set;
+ if (have_irqs)
+ mvchip->chip.to_irq = mvebu_gpio_to_irq;
+ mvchip->chip.base = id * MVEBU_MAX_GPIO_PER_BANK;
+ mvchip->chip.ngpio = ngpios;
+ mvchip->chip.can_sleep = false;
+ mvchip->chip.of_node = np;
+ mvchip->chip.dbg_show = mvebu_gpio_dbg_show;
+
+ if (soc_variant == MVEBU_GPIO_SOC_VARIANT_A8K)
+ err = mvebu_gpio_probe_syscon(pdev, mvchip);
+ else
+ err = mvebu_gpio_probe_raw(pdev, mvchip);
+
+ if (err)
+ return err;
+
+ /*
+ * Mask and clear GPIO interrupts.
+ */
+ switch (soc_variant) {
+ case MVEBU_GPIO_SOC_VARIANT_ORION:
+ case MVEBU_GPIO_SOC_VARIANT_A8K:
+ regmap_write(mvchip->regs,
+ GPIO_EDGE_CAUSE_OFF + mvchip->offset, 0);
+ regmap_write(mvchip->regs,
+ GPIO_EDGE_MASK_OFF + mvchip->offset, 0);
+ regmap_write(mvchip->regs,
+ GPIO_LEVEL_MASK_OFF + mvchip->offset, 0);
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_MV78200:
+ regmap_write(mvchip->regs, GPIO_EDGE_CAUSE_OFF, 0);
+ for (cpu = 0; cpu < 2; cpu++) {
+ regmap_write(mvchip->regs,
+ GPIO_EDGE_MASK_MV78200_OFF(cpu), 0);
+ regmap_write(mvchip->regs,
+ GPIO_LEVEL_MASK_MV78200_OFF(cpu), 0);
+ }
+ break;
+ case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+ regmap_write(mvchip->regs, GPIO_EDGE_CAUSE_OFF, 0);
+ regmap_write(mvchip->regs, GPIO_EDGE_MASK_OFF, 0);
+ regmap_write(mvchip->regs, GPIO_LEVEL_MASK_OFF, 0);
+ for (cpu = 0; cpu < 4; cpu++) {
+ regmap_write(mvchip->percpu_regs,
+ GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu), 0);
+ regmap_write(mvchip->percpu_regs,
+ GPIO_EDGE_MASK_ARMADAXP_OFF(cpu), 0);
+ regmap_write(mvchip->percpu_regs,
+ GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu), 0);
+ }
+ break;
+ default:
+ BUG();
+ }
+
+ devm_gpiochip_add_data(&pdev->dev, &mvchip->chip, mvchip);
+
+ /* Some gpio controllers do not provide irq support */
+ if (!have_irqs)
+ return 0;
+
+ mvchip->domain =
+ irq_domain_add_linear(np, ngpios, &irq_generic_chip_ops, NULL);
+ if (!mvchip->domain) {
+ dev_err(&pdev->dev, "couldn't allocate irq domain %s (DT).\n",
+ mvchip->chip.label);
+ return -ENODEV;
+ }
+
+ err = irq_alloc_domain_generic_chips(
+ mvchip->domain, ngpios, 2, np->name, handle_level_irq,
+ IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_LEVEL, 0, 0);
+ if (err) {
+ dev_err(&pdev->dev, "couldn't allocate irq chips %s (DT).\n",
+ mvchip->chip.label);
+ goto err_domain;
+ }
+
+ /*
+ * NOTE: The common accessors cannot be used because of the percpu
+ * access to the mask registers
+ */
+ gc = irq_get_domain_generic_chip(mvchip->domain, 0);
+ gc->private = mvchip;
+ ct = &gc->chip_types[0];
+ ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
+ ct->chip.irq_mask = mvebu_gpio_level_irq_mask;
+ ct->chip.irq_unmask = mvebu_gpio_level_irq_unmask;
+ ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
+ ct->chip.name = mvchip->chip.label;
+
+ ct = &gc->chip_types[1];
+ ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+ ct->chip.irq_ack = mvebu_gpio_irq_ack;
+ ct->chip.irq_mask = mvebu_gpio_edge_irq_mask;
+ ct->chip.irq_unmask = mvebu_gpio_edge_irq_unmask;
+ ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
+ ct->handler = handle_edge_irq;
+ ct->chip.name = mvchip->chip.label;
+
+ /*
+ * Setup the interrupt handlers. Each chip can have up to 4
+ * interrupt handlers, with each handler dealing with 8 GPIO
+ * pins.
+ */
+ for (i = 0; i < 4; i++) {
+ int irq = platform_get_irq(pdev, i);
+
+ if (irq < 0)
+ continue;
+ irq_set_chained_handler_and_data(irq, mvebu_gpio_irq_handler,
+ mvchip);
+ }
+
+ /* Some MVEBU SoCs have simple PWM support for GPIO lines */
+ if (IS_ENABLED(CONFIG_PWM))
+ return mvebu_pwm_probe(pdev, mvchip, id);
+
+ return 0;
+
+err_domain:
+ irq_domain_remove(mvchip->domain);
+
+ return err;
+}
+
+static struct platform_driver mvebu_gpio_driver = {
+ .driver = {
+ .name = "mvebu-gpio",
+ .of_match_table = mvebu_gpio_of_match,
+ },
+ .probe = mvebu_gpio_probe,
+ .suspend = mvebu_gpio_suspend,
+ .resume = mvebu_gpio_resume,
+};
+builtin_platform_driver(mvebu_gpio_driver);