From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/gpio/gpio-adp5588.c | 242 +++++++++++++++++++++---------------------------
1 files changed, 107 insertions(+), 135 deletions(-)
diff --git a/kernel/drivers/gpio/gpio-adp5588.c b/kernel/drivers/gpio/gpio-adp5588.c
index da9781a..f1e4ac9 100644
--- a/kernel/drivers/gpio/gpio-adp5588.c
+++ b/kernel/drivers/gpio/gpio-adp5588.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* GPIO Chip driver for Analog Devices
* ADP5588/ADP5587 I/O Expander and QWERTY Keypad Controller
*
* Copyright 2009-2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
*/
#include <linux/module.h>
@@ -15,6 +14,7 @@
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/of_device.h>
#include <linux/platform_data/adp5588.h>
@@ -33,16 +33,13 @@
struct mutex lock; /* protect cached dir, dat_out */
/* protect serialized access to the interrupt controller bus */
struct mutex irq_lock;
- unsigned gpio_start;
- unsigned irq_base;
uint8_t dat_out[3];
uint8_t dir[3];
- uint8_t int_lvl[3];
+ uint8_t int_lvl_low[3];
+ uint8_t int_lvl_high[3];
uint8_t int_en[3];
uint8_t irq_mask[3];
- uint8_t irq_stat[3];
uint8_t int_input_en[3];
- uint8_t int_lvl_cached[3];
};
static int adp5588_gpio_read(struct i2c_client *client, u8 reg)
@@ -148,16 +145,11 @@
}
#ifdef CONFIG_GPIO_ADP5588_IRQ
-static int adp5588_gpio_to_irq(struct gpio_chip *chip, unsigned off)
-{
- struct adp5588_gpio *dev = gpiochip_get_data(chip);
-
- return dev->irq_base + off;
-}
static void adp5588_irq_bus_lock(struct irq_data *d)
{
- struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_gpio *dev = gpiochip_get_data(gc);
mutex_lock(&dev->irq_lock);
}
@@ -172,7 +164,8 @@
static void adp5588_irq_bus_sync_unlock(struct irq_data *d)
{
- struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_gpio *dev = gpiochip_get_data(gc);
int i;
for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
@@ -185,15 +178,9 @@
mutex_unlock(&dev->lock);
}
- if (dev->int_lvl_cached[i] != dev->int_lvl[i]) {
- dev->int_lvl_cached[i] = dev->int_lvl[i];
- adp5588_gpio_write(dev->client, GPIO_INT_LVL1 + i,
- dev->int_lvl[i]);
- }
-
if (dev->int_en[i] ^ dev->irq_mask[i]) {
dev->int_en[i] = dev->irq_mask[i];
- adp5588_gpio_write(dev->client, GPIO_INT_EN1 + i,
+ adp5588_gpio_write(dev->client, GPI_EM1 + i,
dev->int_en[i]);
}
}
@@ -203,41 +190,38 @@
static void adp5588_irq_mask(struct irq_data *d)
{
- struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
- unsigned gpio = d->irq - dev->irq_base;
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_gpio *dev = gpiochip_get_data(gc);
- dev->irq_mask[ADP5588_BANK(gpio)] &= ~ADP5588_BIT(gpio);
+ dev->irq_mask[ADP5588_BANK(d->hwirq)] &= ~ADP5588_BIT(d->hwirq);
}
static void adp5588_irq_unmask(struct irq_data *d)
{
- struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
- unsigned gpio = d->irq - dev->irq_base;
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_gpio *dev = gpiochip_get_data(gc);
- dev->irq_mask[ADP5588_BANK(gpio)] |= ADP5588_BIT(gpio);
+ dev->irq_mask[ADP5588_BANK(d->hwirq)] |= ADP5588_BIT(d->hwirq);
}
static int adp5588_irq_set_type(struct irq_data *d, unsigned int type)
{
- struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
- uint16_t gpio = d->irq - dev->irq_base;
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_gpio *dev = gpiochip_get_data(gc);
+ uint16_t gpio = d->hwirq;
unsigned bank, bit;
-
- if ((type & IRQ_TYPE_EDGE_BOTH)) {
- dev_err(&dev->client->dev, "irq %d: unsupported type %d\n",
- d->irq, type);
- return -EINVAL;
- }
bank = ADP5588_BANK(gpio);
bit = ADP5588_BIT(gpio);
- if (type & IRQ_TYPE_LEVEL_HIGH)
- dev->int_lvl[bank] |= bit;
- else if (type & IRQ_TYPE_LEVEL_LOW)
- dev->int_lvl[bank] &= ~bit;
- else
- return -EINVAL;
+ dev->int_lvl_low[bank] &= ~bit;
+ dev->int_lvl_high[bank] &= ~bit;
+
+ if (type & IRQ_TYPE_EDGE_BOTH || type & IRQ_TYPE_LEVEL_HIGH)
+ dev->int_lvl_high[bank] |= bit;
+
+ if (type & IRQ_TYPE_EDGE_BOTH || type & IRQ_TYPE_LEVEL_LOW)
+ dev->int_lvl_low[bank] |= bit;
dev->int_input_en[bank] |= bit;
@@ -253,40 +237,32 @@
.irq_set_type = adp5588_irq_set_type,
};
-static int adp5588_gpio_read_intstat(struct i2c_client *client, u8 *buf)
-{
- int ret = i2c_smbus_read_i2c_block_data(client, GPIO_INT_STAT1, 3, buf);
-
- if (ret < 0)
- dev_err(&client->dev, "Read INT_STAT Error\n");
-
- return ret;
-}
-
static irqreturn_t adp5588_irq_handler(int irq, void *devid)
{
struct adp5588_gpio *dev = devid;
- unsigned status, bank, bit, pending;
- int ret;
- status = adp5588_gpio_read(dev->client, INT_STAT);
+ int status = adp5588_gpio_read(dev->client, INT_STAT);
- if (status & ADP5588_GPI_INT) {
- ret = adp5588_gpio_read_intstat(dev->client, dev->irq_stat);
- if (ret < 0)
- memset(dev->irq_stat, 0, ARRAY_SIZE(dev->irq_stat));
+ if (status & ADP5588_KE_INT) {
+ int ev_cnt = adp5588_gpio_read(dev->client, KEY_LCK_EC_STAT);
- for (bank = 0, bit = 0; bank <= ADP5588_BANK(ADP5588_MAXGPIO);
- bank++, bit = 0) {
- pending = dev->irq_stat[bank] & dev->irq_mask[bank];
+ if (ev_cnt > 0) {
+ int i;
- while (pending) {
- if (pending & (1 << bit)) {
- handle_nested_irq(dev->irq_base +
- (bank << 3) + bit);
- pending &= ~(1 << bit);
+ for (i = 0; i < (ev_cnt & ADP5588_KEC); i++) {
+ int key = adp5588_gpio_read(dev->client,
+ Key_EVENTA + i);
+ /* GPIN events begin at 97,
+ * bit 7 indicates logic level
+ */
+ int gpio = (key & 0x7f) - 97;
+ int lvl = key & (1 << 7);
+ int bank = ADP5588_BANK(gpio);
+ int bit = ADP5588_BIT(gpio);
- }
- bit++;
+ if ((lvl && dev->int_lvl_high[bank] & bit) ||
+ (!lvl && dev->int_lvl_low[bank] & bit))
+ handle_nested_irq(irq_find_mapping(
+ dev->gpio_chip.irq.domain, gpio));
}
}
}
@@ -296,56 +272,54 @@
return IRQ_HANDLED;
}
+
+static int adp5588_irq_init_hw(struct gpio_chip *gc)
+{
+ struct adp5588_gpio *dev = gpiochip_get_data(gc);
+ /* Enable IRQs after registering chip */
+ adp5588_gpio_write(dev->client, CFG,
+ ADP5588_AUTO_INC | ADP5588_INT_CFG | ADP5588_KE_IEN);
+
+ return 0;
+}
+
static int adp5588_irq_setup(struct adp5588_gpio *dev)
{
struct i2c_client *client = dev->client;
+ int ret;
struct adp5588_gpio_platform_data *pdata =
dev_get_platdata(&client->dev);
- unsigned gpio;
- int ret;
+ struct gpio_irq_chip *girq;
adp5588_gpio_write(client, CFG, ADP5588_AUTO_INC);
adp5588_gpio_write(client, INT_STAT, -1); /* status is W1C */
- adp5588_gpio_read_intstat(client, dev->irq_stat); /* read to clear */
- dev->irq_base = pdata->irq_base;
mutex_init(&dev->irq_lock);
- for (gpio = 0; gpio < dev->gpio_chip.ngpio; gpio++) {
- int irq = gpio + dev->irq_base;
- irq_set_chip_data(irq, dev);
- irq_set_chip_and_handler(irq, &adp5588_irq_chip,
- handle_level_irq);
- irq_set_nested_thread(irq, 1);
- irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
- }
-
- ret = request_threaded_irq(client->irq,
- NULL,
- adp5588_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- dev_name(&client->dev), dev);
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, adp5588_irq_handler, IRQF_ONESHOT
+ | IRQF_TRIGGER_FALLING | IRQF_SHARED,
+ dev_name(&client->dev), dev);
if (ret) {
dev_err(&client->dev, "failed to request irq %d\n",
client->irq);
- goto out;
+ return ret;
}
- dev->gpio_chip.to_irq = adp5588_gpio_to_irq;
- adp5588_gpio_write(client, CFG,
- ADP5588_AUTO_INC | ADP5588_INT_CFG | ADP5588_GPI_INT);
+ /* This will be registered in the call to devm_gpiochip_add_data() */
+ girq = &dev->gpio_chip.irq;
+ girq->chip = &adp5588_irq_chip;
+ /* This will let us handle the parent IRQ in the driver */
+ girq->parent_handler = NULL;
+ girq->num_parents = 0;
+ girq->parents = NULL;
+ girq->first = pdata ? pdata->irq_base : 0;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_simple_irq;
+ girq->init_hw = adp5588_irq_init_hw;
+ girq->threaded = true;
return 0;
-
-out:
- dev->irq_base = 0;
- return ret;
-}
-
-static void adp5588_irq_teardown(struct adp5588_gpio *dev)
-{
- if (dev->irq_base)
- free_irq(dev->client->irq, dev);
}
#else
@@ -357,24 +331,16 @@
return 0;
}
-static void adp5588_irq_teardown(struct adp5588_gpio *dev)
-{
-}
#endif /* CONFIG_GPIO_ADP5588_IRQ */
-static int adp5588_gpio_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int adp5588_gpio_probe(struct i2c_client *client)
{
struct adp5588_gpio_platform_data *pdata =
dev_get_platdata(&client->dev);
struct adp5588_gpio *dev;
struct gpio_chip *gc;
int ret, i, revid;
-
- if (!pdata) {
- dev_err(&client->dev, "missing platform data\n");
- return -ENODEV;
- }
+ unsigned int pullup_dis_mask = 0;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
@@ -394,18 +360,24 @@
gc->get = adp5588_gpio_get_value;
gc->set = adp5588_gpio_set_value;
gc->can_sleep = true;
+ gc->base = -1;
+ gc->parent = &client->dev;
- gc->base = pdata->gpio_start;
+ if (pdata) {
+ gc->base = pdata->gpio_start;
+ gc->names = pdata->names;
+ pullup_dis_mask = pdata->pullup_dis_mask;
+ }
+
gc->ngpio = ADP5588_MAXGPIO;
gc->label = client->name;
gc->owner = THIS_MODULE;
- gc->names = pdata->names;
mutex_init(&dev->lock);
ret = adp5588_gpio_read(dev->client, DEV_ID);
if (ret < 0)
- goto err;
+ return ret;
revid = ret & ADP5588_DEVICE_ID_MASK;
@@ -414,30 +386,27 @@
dev->dir[i] = adp5588_gpio_read(client, GPIO_DIR1 + i);
ret |= adp5588_gpio_write(client, KP_GPIO1 + i, 0);
ret |= adp5588_gpio_write(client, GPIO_PULL1 + i,
- (pdata->pullup_dis_mask >> (8 * i)) & 0xFF);
+ (pullup_dis_mask >> (8 * i)) & 0xFF);
ret |= adp5588_gpio_write(client, GPIO_INT_EN1 + i, 0);
if (ret)
- goto err;
+ return ret;
}
- if (pdata->irq_base) {
+ if (client->irq) {
if (WA_DELAYED_READOUT_REVID(revid)) {
dev_warn(&client->dev, "GPIO int not supported\n");
} else {
ret = adp5588_irq_setup(dev);
if (ret)
- goto err;
+ return ret;
}
}
ret = devm_gpiochip_add_data(&client->dev, &dev->gpio_chip, dev);
if (ret)
- goto err_irq;
+ return ret;
- dev_info(&client->dev, "IRQ Base: %d Rev.: %d\n",
- pdata->irq_base, revid);
-
- if (pdata->setup) {
+ if (pdata && pdata->setup) {
ret = pdata->setup(client, gc->base, gc->ngpio, pdata->context);
if (ret < 0)
dev_warn(&client->dev, "setup failed, %d\n", ret);
@@ -446,11 +415,6 @@
i2c_set_clientdata(client, dev);
return 0;
-
-err_irq:
- adp5588_irq_teardown(dev);
-err:
- return ret;
}
static int adp5588_gpio_remove(struct i2c_client *client)
@@ -460,7 +424,7 @@
struct adp5588_gpio *dev = i2c_get_clientdata(client);
int ret;
- if (pdata->teardown) {
+ if (pdata && pdata->teardown) {
ret = pdata->teardown(client,
dev->gpio_chip.base, dev->gpio_chip.ngpio,
pdata->context);
@@ -470,7 +434,7 @@
}
}
- if (dev->irq_base)
+ if (dev->client->irq)
free_irq(dev->client->irq, dev);
return 0;
@@ -480,20 +444,28 @@
{DRV_NAME, 0},
{}
};
-
MODULE_DEVICE_TABLE(i2c, adp5588_gpio_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id adp5588_gpio_of_id[] = {
+ { .compatible = "adi," DRV_NAME, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, adp5588_gpio_of_id);
+#endif
static struct i2c_driver adp5588_gpio_driver = {
.driver = {
- .name = DRV_NAME,
- },
- .probe = adp5588_gpio_probe,
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(adp5588_gpio_of_id),
+ },
+ .probe_new = adp5588_gpio_probe,
.remove = adp5588_gpio_remove,
.id_table = adp5588_gpio_id,
};
module_i2c_driver(adp5588_gpio_driver);
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("GPIO ADP5588 Driver");
MODULE_LICENSE("GPL");
--
Gitblit v1.6.2