+// SPDX-License-Identifier: GPL-2.0+
/*
* Take linux kernel driver drivers/gpio/gpio-pca953x.c for reference.
*
* Copyright (C) 2016 Peng Fan <van.freenix@gmail.com>
*
- * SPDX-License-Identifier: GPL-2.0+
- *
*/
/*
*
* TODO:
* 1. Support PCA957X_TYPE
- * 2. Support 24 gpio pins
- * 3. Support Polarity Inversion
+ * 2. Support Polarity Inversion
*/
#include <common.h>
#include <malloc.h>
#include <asm/gpio.h>
#include <asm/io.h>
+#include <dm/device_compat.h>
#include <dt-bindings/gpio/gpio.h>
#define PCA953X_INPUT 0
ret = dm_i2c_read(dev, reg, val, 1);
} else if (info->gpio_count <= 16) {
ret = dm_i2c_read(dev, reg << 1, val, info->bank_count);
+ } else if (info->gpio_count <= 24) {
+ /* Auto increment */
+ ret = dm_i2c_read(dev, (reg << 2) | 0x80, val,
+ info->bank_count);
} else if (info->gpio_count == 40) {
/* Auto increment */
ret = dm_i2c_read(dev, (reg << 3) | 0x80, val,
return ret;
}
+static int pca953x_write_regs(struct udevice *dev, int reg, u8 *val)
+{
+ struct pca953x_info *info = dev_get_platdata(dev);
+ int ret = 0;
+
+ if (info->gpio_count <= 8) {
+ ret = dm_i2c_write(dev, reg, val, 1);
+ } else if (info->gpio_count <= 16) {
+ ret = dm_i2c_write(dev, reg << 1, val, info->bank_count);
+ } else if (info->gpio_count <= 24) {
+ /* Auto increment */
+ ret = dm_i2c_write(dev, (reg << 2) | 0x80, val,
+ info->bank_count);
+ } else if (info->gpio_count == 40) {
+ /* Auto increment */
+ ret = dm_i2c_write(dev, (reg << 3) | 0x80, val, info->bank_count);
+ } else {
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
static int pca953x_is_output(struct udevice *dev, int offset)
{
struct pca953x_info *info = dev_get_platdata(dev);
struct ofnode_phandle_args *args)
{
desc->offset = args->args[0];
- desc->flags = args->args[1] & (GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0);
+ desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
return 0;
}
int ret;
int size;
const u8 *tmp;
+ u8 val[MAX_BANK];
addr = dev_read_addr(dev);
if (addr == 0)
snprintf(name, sizeof(name), "gpio@%x_", info->addr);
}
+ /* Clear the polarity registers to no invert */
+ memset(val, 0, MAX_BANK);
+ ret = pca953x_write_regs(dev, PCA953X_INVERT, val);
+ if (ret < 0) {
+ dev_err(dev, "Error writing invert register\n");
+ return ret;
+ }
+
str = strdup(name);
if (!str)
return -ENOMEM;
{ .compatible = "ti,tca6408", .data = OF_953X(8, PCA_INT), },
{ .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), },
{ .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), },
+ { .compatible = "ti,tca9539", .data = OF_953X(16, PCA_INT), },
{ .compatible = "onsemi,pca9654", .data = OF_953X(8, PCA_INT), },