Commit 25518e02 authored by Baolin Wang's avatar Baolin Wang Committed by Linus Walleij
Browse files

gpio: Add Spreadtrum EIC driver support



The Spreadtrum digital-chip EIC controller has 4 sub-modules: debounce EIC,
latch EIC, async EIC and sync EIC, and each sub-module can has multiple
banks and each bank contains 8 EICs.

Each EIC can only be used as input mode, and has the capability to trigger
interrupts when detecting input signals.
Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent be520cbc
......@@ -170,6 +170,14 @@ config GPIO_DWAPB
Say Y or M here to build support for the Synopsys DesignWare APB
GPIO block.
config GPIO_EIC_SPRD
tristate "Spreadtrum EIC support"
depends on ARCH_SPRD || COMPILE_TEST
depends on OF_GPIO
select GPIOLIB_IRQCHIP
help
Say yes here to support Spreadtrum EIC device.
config GPIO_EM
tristate "Emma Mobile GPIO"
depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
......
......@@ -45,6 +45,7 @@ obj-$(CONFIG_GPIO_DA9055) += gpio-da9055.o
obj-$(CONFIG_GPIO_DAVINCI) += gpio-davinci.o
obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o
obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o
obj-$(CONFIG_GPIO_EIC_SPRD) += gpio-eic-sprd.o
obj-$(CONFIG_GPIO_EM) += gpio-em.o
obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
obj-$(CONFIG_GPIO_ETRAXFS) += gpio-etraxfs.o
......
// 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)
{
return sprd_eic_read(chip, offset, SPRD_EIC_DBNC_DATA);
}
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);
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;
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;
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_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_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;
}
default:
dev_err(chip->parent, "Unsupported EIC type.\n");
return -ENOTSUPP;
}
return 0;
}
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, &reg, SPRD_EIC_PER_BANK_NR) {
girq = irq_find_mapping(chip->irq.domain,
bank * SPRD_EIC_PER_BANK_NR + n);
generic_handle_irq(girq);
}
}
}
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) {
dev_err(&pdev->dev, "Failed to get EIC interrupt.\n");
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)
continue;
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.of_node = pdev->dev.of_node;
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;
/* fall-through */
case SPRD_EIC_ASYNC:
/* fall-through */
case SPRD_EIC_SYNC:
sprd_eic->chip.get = sprd_eic_get;
break;
case SPRD_EIC_LATCH:
/* fall-through */
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 = {