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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2018 Spreadtrum Communications Inc.
- * Copyright (C) 2018 Linaro Ltd.
- */
- #include <linux/bitops.h>
- #include <linux/gpio/driver.h>
- #include <linux/interrupt.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/of_device.h>
- #include <linux/platform_device.h>
- #include <linux/spinlock.h>
- /* EIC registers definition */
- #define SPRD_EIC_DBNC_DATA 0x0
- #define SPRD_EIC_DBNC_DMSK 0x4
- #define SPRD_EIC_DBNC_IEV 0x14
- #define SPRD_EIC_DBNC_IE 0x18
- #define SPRD_EIC_DBNC_RIS 0x1c
- #define SPRD_EIC_DBNC_MIS 0x20
- #define SPRD_EIC_DBNC_IC 0x24
- #define SPRD_EIC_DBNC_TRIG 0x28
- #define SPRD_EIC_DBNC_CTRL0 0x40
- #define SPRD_EIC_LATCH_INTEN 0x0
- #define SPRD_EIC_LATCH_INTRAW 0x4
- #define SPRD_EIC_LATCH_INTMSK 0x8
- #define SPRD_EIC_LATCH_INTCLR 0xc
- #define SPRD_EIC_LATCH_INTPOL 0x10
- #define SPRD_EIC_LATCH_INTMODE 0x14
- #define SPRD_EIC_ASYNC_INTIE 0x0
- #define SPRD_EIC_ASYNC_INTRAW 0x4
- #define SPRD_EIC_ASYNC_INTMSK 0x8
- #define SPRD_EIC_ASYNC_INTCLR 0xc
- #define SPRD_EIC_ASYNC_INTMODE 0x10
- #define SPRD_EIC_ASYNC_INTBOTH 0x14
- #define SPRD_EIC_ASYNC_INTPOL 0x18
- #define SPRD_EIC_ASYNC_DATA 0x1c
- #define SPRD_EIC_SYNC_INTIE 0x0
- #define SPRD_EIC_SYNC_INTRAW 0x4
- #define SPRD_EIC_SYNC_INTMSK 0x8
- #define SPRD_EIC_SYNC_INTCLR 0xc
- #define SPRD_EIC_SYNC_INTMODE 0x10
- #define SPRD_EIC_SYNC_INTBOTH 0x14
- #define SPRD_EIC_SYNC_INTPOL 0x18
- #define SPRD_EIC_SYNC_DATA 0x1c
- /*
- * The digital-chip EIC controller can support maximum 3 banks, and each bank
- * contains 8 EICs.
- */
- #define SPRD_EIC_MAX_BANK 3
- #define SPRD_EIC_PER_BANK_NR 8
- #define SPRD_EIC_DATA_MASK GENMASK(7, 0)
- #define SPRD_EIC_BIT(x) ((x) & (SPRD_EIC_PER_BANK_NR - 1))
- #define SPRD_EIC_DBNC_MASK GENMASK(11, 0)
- /*
- * The Spreadtrum EIC (external interrupt controller) can be used only in
- * input mode to generate interrupts if detecting input signals.
- *
- * The Spreadtrum digital-chip EIC controller contains 4 sub-modules:
- * debounce EIC, latch EIC, async EIC and sync EIC,
- *
- * The debounce EIC is used to capture the input signals' stable status
- * (millisecond resolution) and a single-trigger mechanism is introduced
- * into this sub-module to enhance the input event detection reliability.
- * The debounce range is from 1ms to 4s with a step size of 1ms.
- *
- * The latch EIC is used to latch some special power down signals and
- * generate interrupts, since the latch EIC does not depend on the APB clock
- * to capture signals.
- *
- * The async EIC uses a 32k clock to capture the short signals (microsecond
- * resolution) to generate interrupts by level or edge trigger.
- *
- * The EIC-sync is similar with GPIO's input function, which is a synchronized
- * signal input register.
- */
- enum sprd_eic_type {
- SPRD_EIC_DEBOUNCE,
- SPRD_EIC_LATCH,
- SPRD_EIC_ASYNC,
- SPRD_EIC_SYNC,
- SPRD_EIC_MAX,
- };
- struct sprd_eic {
- struct gpio_chip chip;
- struct irq_chip intc;
- void __iomem *base[SPRD_EIC_MAX_BANK];
- enum sprd_eic_type type;
- spinlock_t lock;
- int irq;
- };
- struct sprd_eic_variant_data {
- enum sprd_eic_type type;
- u32 num_eics;
- };
- static const char *sprd_eic_label_name[SPRD_EIC_MAX] = {
- "eic-debounce", "eic-latch", "eic-async",
- "eic-sync",
- };
- static const struct sprd_eic_variant_data sc9860_eic_dbnc_data = {
- .type = SPRD_EIC_DEBOUNCE,
- .num_eics = 8,
- };
- static const struct sprd_eic_variant_data sc9860_eic_latch_data = {
- .type = SPRD_EIC_LATCH,
- .num_eics = 8,
- };
- static const struct sprd_eic_variant_data sc9860_eic_async_data = {
- .type = SPRD_EIC_ASYNC,
- .num_eics = 8,
- };
- static const struct sprd_eic_variant_data sc9860_eic_sync_data = {
- .type = SPRD_EIC_SYNC,
- .num_eics = 8,
- };
- static inline void __iomem *sprd_eic_offset_base(struct sprd_eic *sprd_eic,
- unsigned int bank)
- {
- if (bank >= SPRD_EIC_MAX_BANK)
- return NULL;
- return sprd_eic->base[bank];
- }
- static void sprd_eic_update(struct gpio_chip *chip, unsigned int offset,
- u16 reg, unsigned int val)
- {
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- void __iomem *base =
- sprd_eic_offset_base(sprd_eic, offset / SPRD_EIC_PER_BANK_NR);
- unsigned long flags;
- u32 tmp;
- spin_lock_irqsave(&sprd_eic->lock, flags);
- tmp = readl_relaxed(base + reg);
- if (val)
- tmp |= BIT(SPRD_EIC_BIT(offset));
- else
- tmp &= ~BIT(SPRD_EIC_BIT(offset));
- writel_relaxed(tmp, base + reg);
- spin_unlock_irqrestore(&sprd_eic->lock, flags);
- }
- static int sprd_eic_read(struct gpio_chip *chip, unsigned int offset, u16 reg)
- {
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- void __iomem *base =
- sprd_eic_offset_base(sprd_eic, offset / SPRD_EIC_PER_BANK_NR);
- return !!(readl_relaxed(base + reg) & BIT(SPRD_EIC_BIT(offset)));
- }
- static int sprd_eic_request(struct gpio_chip *chip, unsigned int offset)
- {
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_DMSK, 1);
- return 0;
- }
- static void sprd_eic_free(struct gpio_chip *chip, unsigned int offset)
- {
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_DMSK, 0);
- }
- static int sprd_eic_get(struct gpio_chip *chip, unsigned int offset)
- {
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- return sprd_eic_read(chip, offset, SPRD_EIC_DBNC_DATA);
- case SPRD_EIC_ASYNC:
- return sprd_eic_read(chip, offset, SPRD_EIC_ASYNC_DATA);
- case SPRD_EIC_SYNC:
- return sprd_eic_read(chip, offset, SPRD_EIC_SYNC_DATA);
- default:
- return -ENOTSUPP;
- }
- }
- static int sprd_eic_direction_input(struct gpio_chip *chip, unsigned int offset)
- {
- /* EICs are always input, nothing need to do here. */
- return 0;
- }
- static void sprd_eic_set(struct gpio_chip *chip, unsigned int offset, int value)
- {
- /* EICs are always input, nothing need to do here. */
- }
- static int sprd_eic_set_debounce(struct gpio_chip *chip, unsigned int offset,
- unsigned int debounce)
- {
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- void __iomem *base =
- sprd_eic_offset_base(sprd_eic, offset / SPRD_EIC_PER_BANK_NR);
- u32 reg = SPRD_EIC_DBNC_CTRL0 + SPRD_EIC_BIT(offset) * 0x4;
- u32 value = readl_relaxed(base + reg) & ~SPRD_EIC_DBNC_MASK;
- value |= (debounce / 1000) & SPRD_EIC_DBNC_MASK;
- writel_relaxed(value, base + reg);
- return 0;
- }
- static int sprd_eic_set_config(struct gpio_chip *chip, unsigned int offset,
- unsigned long config)
- {
- unsigned long param = pinconf_to_config_param(config);
- u32 arg = pinconf_to_config_argument(config);
- if (param == PIN_CONFIG_INPUT_DEBOUNCE)
- return sprd_eic_set_debounce(chip, offset, arg);
- return -ENOTSUPP;
- }
- static void sprd_eic_irq_mask(struct irq_data *data)
- {
- struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- u32 offset = irqd_to_hwirq(data);
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_TRIG, 0);
- break;
- case SPRD_EIC_LATCH:
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTEN, 0);
- break;
- case SPRD_EIC_ASYNC:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTIE, 0);
- break;
- case SPRD_EIC_SYNC:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTIE, 0);
- break;
- default:
- dev_err(chip->parent, "Unsupported EIC type.\n");
- }
- }
- static void sprd_eic_irq_unmask(struct irq_data *data)
- {
- struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- u32 offset = irqd_to_hwirq(data);
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IE, 1);
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_TRIG, 1);
- break;
- case SPRD_EIC_LATCH:
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTEN, 1);
- break;
- case SPRD_EIC_ASYNC:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTIE, 1);
- break;
- case SPRD_EIC_SYNC:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTIE, 1);
- break;
- default:
- dev_err(chip->parent, "Unsupported EIC type.\n");
- }
- }
- static void sprd_eic_irq_ack(struct irq_data *data)
- {
- struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- u32 offset = irqd_to_hwirq(data);
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IC, 1);
- break;
- case SPRD_EIC_LATCH:
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTCLR, 1);
- break;
- case SPRD_EIC_ASYNC:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
- break;
- case SPRD_EIC_SYNC:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
- break;
- default:
- dev_err(chip->parent, "Unsupported EIC type.\n");
- }
- }
- static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
- {
- struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- u32 offset = irqd_to_hwirq(data);
- int state;
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- switch (flow_type) {
- case IRQ_TYPE_LEVEL_HIGH:
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 1);
- break;
- case IRQ_TYPE_LEVEL_LOW:
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 0);
- break;
- case IRQ_TYPE_EDGE_RISING:
- case IRQ_TYPE_EDGE_FALLING:
- case IRQ_TYPE_EDGE_BOTH:
- state = sprd_eic_get(chip, offset);
- if (state)
- sprd_eic_update(chip, offset,
- SPRD_EIC_DBNC_IEV, 0);
- else
- sprd_eic_update(chip, offset,
- SPRD_EIC_DBNC_IEV, 1);
- break;
- default:
- return -ENOTSUPP;
- }
- irq_set_handler_locked(data, handle_level_irq);
- break;
- case SPRD_EIC_LATCH:
- switch (flow_type) {
- case IRQ_TYPE_LEVEL_HIGH:
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 0);
- break;
- case IRQ_TYPE_LEVEL_LOW:
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 1);
- break;
- case IRQ_TYPE_EDGE_RISING:
- case IRQ_TYPE_EDGE_FALLING:
- case IRQ_TYPE_EDGE_BOTH:
- state = sprd_eic_get(chip, offset);
- if (state)
- sprd_eic_update(chip, offset,
- SPRD_EIC_LATCH_INTPOL, 0);
- else
- sprd_eic_update(chip, offset,
- SPRD_EIC_LATCH_INTPOL, 1);
- break;
- default:
- return -ENOTSUPP;
- }
- irq_set_handler_locked(data, handle_level_irq);
- break;
- case SPRD_EIC_ASYNC:
- switch (flow_type) {
- case IRQ_TYPE_EDGE_RISING:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
- irq_set_handler_locked(data, handle_edge_irq);
- break;
- case IRQ_TYPE_EDGE_FALLING:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
- irq_set_handler_locked(data, handle_edge_irq);
- break;
- case IRQ_TYPE_EDGE_BOTH:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 1);
- irq_set_handler_locked(data, handle_edge_irq);
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
- irq_set_handler_locked(data, handle_level_irq);
- break;
- case IRQ_TYPE_LEVEL_LOW:
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
- sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
- irq_set_handler_locked(data, handle_level_irq);
- break;
- default:
- return -ENOTSUPP;
- }
- break;
- case SPRD_EIC_SYNC:
- switch (flow_type) {
- case IRQ_TYPE_EDGE_RISING:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
- irq_set_handler_locked(data, handle_edge_irq);
- break;
- case IRQ_TYPE_EDGE_FALLING:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
- irq_set_handler_locked(data, handle_edge_irq);
- break;
- case IRQ_TYPE_EDGE_BOTH:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 1);
- irq_set_handler_locked(data, handle_edge_irq);
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
- irq_set_handler_locked(data, handle_level_irq);
- break;
- case IRQ_TYPE_LEVEL_LOW:
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
- sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
- irq_set_handler_locked(data, handle_level_irq);
- break;
- default:
- return -ENOTSUPP;
- }
- break;
- default:
- dev_err(chip->parent, "Unsupported EIC type.\n");
- return -ENOTSUPP;
- }
- return 0;
- }
- static void sprd_eic_toggle_trigger(struct gpio_chip *chip, unsigned int irq,
- unsigned int offset)
- {
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- struct irq_data *data = irq_get_irq_data(irq);
- u32 trigger = irqd_get_trigger_type(data);
- int state, post_state;
- /*
- * The debounce EIC and latch EIC can only support level trigger, so we
- * can toggle the level trigger to emulate the edge trigger.
- */
- if ((sprd_eic->type != SPRD_EIC_DEBOUNCE &&
- sprd_eic->type != SPRD_EIC_LATCH) ||
- !(trigger & IRQ_TYPE_EDGE_BOTH))
- return;
- sprd_eic_irq_mask(data);
- state = sprd_eic_get(chip, offset);
- retry:
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- if (state)
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 0);
- else
- sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 1);
- break;
- case SPRD_EIC_LATCH:
- if (state)
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 0);
- else
- sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 1);
- break;
- default:
- sprd_eic_irq_unmask(data);
- return;
- }
- post_state = sprd_eic_get(chip, offset);
- if (state != post_state) {
- dev_warn(chip->parent, "EIC level was changed.\n");
- state = post_state;
- goto retry;
- }
- sprd_eic_irq_unmask(data);
- }
- static int sprd_eic_match_chip_by_type(struct gpio_chip *chip, void *data)
- {
- enum sprd_eic_type type = *(enum sprd_eic_type *)data;
- return !strcmp(chip->label, sprd_eic_label_name[type]);
- }
- static void sprd_eic_handle_one_type(struct gpio_chip *chip)
- {
- struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
- u32 bank, n, girq;
- for (bank = 0; bank * SPRD_EIC_PER_BANK_NR < chip->ngpio; bank++) {
- void __iomem *base = sprd_eic_offset_base(sprd_eic, bank);
- unsigned long reg;
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- reg = readl_relaxed(base + SPRD_EIC_DBNC_MIS) &
- SPRD_EIC_DATA_MASK;
- break;
- case SPRD_EIC_LATCH:
- reg = readl_relaxed(base + SPRD_EIC_LATCH_INTMSK) &
- SPRD_EIC_DATA_MASK;
- break;
- case SPRD_EIC_ASYNC:
- reg = readl_relaxed(base + SPRD_EIC_ASYNC_INTMSK) &
- SPRD_EIC_DATA_MASK;
- break;
- case SPRD_EIC_SYNC:
- reg = readl_relaxed(base + SPRD_EIC_SYNC_INTMSK) &
- SPRD_EIC_DATA_MASK;
- break;
- default:
- dev_err(chip->parent, "Unsupported EIC type.\n");
- return;
- }
- for_each_set_bit(n, ®, SPRD_EIC_PER_BANK_NR) {
- u32 offset = bank * SPRD_EIC_PER_BANK_NR + n;
- girq = irq_find_mapping(chip->irq.domain, offset);
- generic_handle_irq(girq);
- sprd_eic_toggle_trigger(chip, girq, offset);
- }
- }
- }
- static void sprd_eic_irq_handler(struct irq_desc *desc)
- {
- struct irq_chip *ic = irq_desc_get_chip(desc);
- struct gpio_chip *chip;
- enum sprd_eic_type type;
- chained_irq_enter(ic, desc);
- /*
- * Since the digital-chip EIC 4 sub-modules (debounce, latch, async
- * and sync) share one same interrupt line, we should iterate each
- * EIC module to check if there are EIC interrupts were triggered.
- */
- for (type = SPRD_EIC_DEBOUNCE; type < SPRD_EIC_MAX; type++) {
- chip = gpiochip_find(&type, sprd_eic_match_chip_by_type);
- if (!chip)
- continue;
- sprd_eic_handle_one_type(chip);
- }
- chained_irq_exit(ic, desc);
- }
- static int sprd_eic_probe(struct platform_device *pdev)
- {
- const struct sprd_eic_variant_data *pdata;
- struct gpio_irq_chip *irq;
- struct sprd_eic *sprd_eic;
- struct resource *res;
- int ret, i;
- pdata = of_device_get_match_data(&pdev->dev);
- if (!pdata) {
- dev_err(&pdev->dev, "No matching driver data found.\n");
- return -EINVAL;
- }
- sprd_eic = devm_kzalloc(&pdev->dev, sizeof(*sprd_eic), GFP_KERNEL);
- if (!sprd_eic)
- return -ENOMEM;
- spin_lock_init(&sprd_eic->lock);
- sprd_eic->type = pdata->type;
- sprd_eic->irq = platform_get_irq(pdev, 0);
- if (sprd_eic->irq < 0)
- return sprd_eic->irq;
- for (i = 0; i < SPRD_EIC_MAX_BANK; i++) {
- /*
- * We can have maximum 3 banks EICs, and each EIC has
- * its own base address. But some platform maybe only
- * have one bank EIC, thus base[1] and base[2] can be
- * optional.
- */
- res = platform_get_resource(pdev, IORESOURCE_MEM, i);
- if (!res)
- break;
- sprd_eic->base[i] = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(sprd_eic->base[i]))
- return PTR_ERR(sprd_eic->base[i]);
- }
- sprd_eic->chip.label = sprd_eic_label_name[sprd_eic->type];
- sprd_eic->chip.ngpio = pdata->num_eics;
- sprd_eic->chip.base = -1;
- sprd_eic->chip.parent = &pdev->dev;
- sprd_eic->chip.direction_input = sprd_eic_direction_input;
- switch (sprd_eic->type) {
- case SPRD_EIC_DEBOUNCE:
- sprd_eic->chip.request = sprd_eic_request;
- sprd_eic->chip.free = sprd_eic_free;
- sprd_eic->chip.set_config = sprd_eic_set_config;
- sprd_eic->chip.set = sprd_eic_set;
- fallthrough;
- case SPRD_EIC_ASYNC:
- case SPRD_EIC_SYNC:
- sprd_eic->chip.get = sprd_eic_get;
- break;
- case SPRD_EIC_LATCH:
- default:
- break;
- }
- sprd_eic->intc.name = dev_name(&pdev->dev);
- sprd_eic->intc.irq_ack = sprd_eic_irq_ack;
- sprd_eic->intc.irq_mask = sprd_eic_irq_mask;
- sprd_eic->intc.irq_unmask = sprd_eic_irq_unmask;
- sprd_eic->intc.irq_set_type = sprd_eic_irq_set_type;
- sprd_eic->intc.flags = IRQCHIP_SKIP_SET_WAKE;
- irq = &sprd_eic->chip.irq;
- irq->chip = &sprd_eic->intc;
- irq->handler = handle_bad_irq;
- irq->default_type = IRQ_TYPE_NONE;
- irq->parent_handler = sprd_eic_irq_handler;
- irq->parent_handler_data = sprd_eic;
- irq->num_parents = 1;
- irq->parents = &sprd_eic->irq;
- ret = devm_gpiochip_add_data(&pdev->dev, &sprd_eic->chip, sprd_eic);
- if (ret < 0) {
- dev_err(&pdev->dev, "Could not register gpiochip %d.\n", ret);
- return ret;
- }
- platform_set_drvdata(pdev, sprd_eic);
- return 0;
- }
- static const struct of_device_id sprd_eic_of_match[] = {
- {
- .compatible = "sprd,sc9860-eic-debounce",
- .data = &sc9860_eic_dbnc_data,
- },
- {
- .compatible = "sprd,sc9860-eic-latch",
- .data = &sc9860_eic_latch_data,
- },
- {
- .compatible = "sprd,sc9860-eic-async",
- .data = &sc9860_eic_async_data,
- },
- {
- .compatible = "sprd,sc9860-eic-sync",
- .data = &sc9860_eic_sync_data,
- },
- {
- /* end of list */
- }
- };
- MODULE_DEVICE_TABLE(of, sprd_eic_of_match);
- static struct platform_driver sprd_eic_driver = {
- .probe = sprd_eic_probe,
- .driver = {
- .name = "sprd-eic",
- .of_match_table = sprd_eic_of_match,
- },
- };
- module_platform_driver(sprd_eic_driver);
- MODULE_DESCRIPTION("Spreadtrum EIC driver");
- MODULE_LICENSE("GPL v2");
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