--- zzzz-none-000/linux-4.4.271/drivers/gpio/gpio-74x164.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/drivers/gpio/gpio-74x164.c	2023-04-19 10:22:28.000000000 +0000
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/mutex.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/74x164.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
 #include <linux/slab.h>
@@ -33,7 +34,7 @@
 
 static int __gen_74x164_write_config(struct gen_74x164_chip *chip)
 {
-	struct spi_device *spi = to_spi_device(chip->gpio_chip.dev);
+	struct spi_device *spi = to_spi_device(chip->gpio_chip.parent);
 	struct spi_message message;
 	struct spi_transfer *msg_buf;
 	int i, ret = 0;
@@ -107,8 +108,18 @@
 static int gen_74x164_probe(struct spi_device *spi)
 {
 	struct gen_74x164_chip *chip;
+	struct gen_74x164_chip_platform_data *pdata;
+	struct device_node *np;
 	int ret;
 
+	pdata = spi->dev.platform_data;
+	np = spi->dev.of_node;
+
+	if (!np && !pdata) {
+		dev_err(&spi->dev, "No configuration data available.\n");
+		return -EINVAL;
+	}
+
 	/*
 	 * bits_per_word cannot be configured in platform data
 	 */
@@ -130,20 +141,30 @@
 	chip->gpio_chip.set = gen_74x164_set_value;
 	chip->gpio_chip.base = -1;
 
-	if (of_property_read_u32(spi->dev.of_node, "registers-number",
-				 &chip->registers)) {
-		dev_err(&spi->dev,
-			"Missing registers-number property in the DT.\n");
-		return -EINVAL;
+	if (np) {
+		if (of_property_read_u32(spi->dev.of_node, "registers-number", &chip->registers)) {
+			dev_err(&spi->dev, "Missing registers-number property in the DT.\n");
+			ret = -EINVAL;
+			goto exit_destroy;
+		}
+	} else if (pdata) {
+		chip->gpio_chip.base = pdata->base;
+		chip->registers = pdata->num_registers;
 	}
 
+	if (!chip->registers)
+		chip->registers = 1;
+
 	chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers;
 	chip->buffer = devm_kzalloc(&spi->dev, chip->registers, GFP_KERNEL);
 	if (!chip->buffer)
 		return -ENOMEM;
 
+	if (pdata && pdata->init_data)
+		memcpy(chip->buffer, pdata->init_data, chip->registers);
+
 	chip->gpio_chip.can_sleep = true;
-	chip->gpio_chip.dev = &spi->dev;
+	chip->gpio_chip.parent = &spi->dev;
 	chip->gpio_chip.owner = THIS_MODULE;
 
 	mutex_init(&chip->lock);
@@ -174,16 +195,18 @@
 	return 0;
 }
 
+#ifdef CONFIG_OF
 static const struct of_device_id gen_74x164_dt_ids[] = {
 	{ .compatible = "fairchild,74hc595" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, gen_74x164_dt_ids);
+#endif
 
 static struct spi_driver gen_74x164_driver = {
 	.driver = {
 		.name		= "74x164",
-		.of_match_table	= gen_74x164_dt_ids,
+		.of_match_table	= of_match_ptr(gen_74x164_dt_ids),
 	},
 	.probe		= gen_74x164_probe,
 	.remove		= gen_74x164_remove,