From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/ata/pata_of_platform.c | 99 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 drivers/ata/pata_of_platform.c

(limited to 'drivers/ata/pata_of_platform.c')

diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
new file mode 100644
index 000000000..4956f0f5b
--- /dev/null
+++ b/drivers/ata/pata_of_platform.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * OF-platform PATA driver
+ *
+ * Copyright (c) 2007  MontaVista Software, Inc.
+ *                     Anton Vorontsov <avorontsov@ru.mvista.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_of_platform"
+
+static const struct scsi_host_template pata_platform_sht = {
+	ATA_PIO_SHT(DRV_NAME),
+};
+
+static int pata_of_platform_probe(struct platform_device *ofdev)
+{
+	int ret;
+	struct device_node *dn = ofdev->dev.of_node;
+	struct resource io_res;
+	struct resource ctl_res;
+	struct resource irq_res;
+	unsigned int reg_shift = 0;
+	int pio_mode = 0;
+	int pio_mask;
+	bool use16bit;
+	int irq;
+
+	ret = of_address_to_resource(dn, 0, &io_res);
+	if (ret) {
+		dev_err(&ofdev->dev, "can't get IO address from "
+			"device tree\n");
+		return -EINVAL;
+	}
+
+	ret = of_address_to_resource(dn, 1, &ctl_res);
+	if (ret) {
+		dev_err(&ofdev->dev, "can't get CTL address from "
+			"device tree\n");
+		return -EINVAL;
+	}
+
+	memset(&irq_res, 0, sizeof(irq_res));
+
+	irq = platform_get_irq_optional(ofdev, 0);
+	if (irq < 0 && irq != -ENXIO)
+		return irq;
+	if (irq > 0) {
+		irq_res.start = irq;
+		irq_res.end = irq;
+	}
+
+	of_property_read_u32(dn, "reg-shift", &reg_shift);
+
+	if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) {
+		if (pio_mode > 6) {
+			dev_err(&ofdev->dev, "invalid pio-mode\n");
+			return -EINVAL;
+		}
+	} else {
+		dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n");
+	}
+
+	use16bit = of_property_read_bool(dn, "ata-generic,use16bit");
+
+	pio_mask = 1 << pio_mode;
+	pio_mask |= (1 << pio_mode) - 1;
+
+	return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq > 0 ? &irq_res : NULL,
+				     reg_shift, pio_mask, &pata_platform_sht,
+				     use16bit);
+}
+
+static const struct of_device_id pata_of_platform_match[] = {
+	{ .compatible = "ata-generic", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, pata_of_platform_match);
+
+static struct platform_driver pata_of_platform_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = pata_of_platform_match,
+	},
+	.probe		= pata_of_platform_probe,
+	.remove_new	= ata_platform_remove_one,
+};
+
+module_platform_driver(pata_of_platform_driver);
+
+MODULE_DESCRIPTION("OF-platform PATA driver");
+MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
+MODULE_LICENSE("GPL");
-- 
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