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/spi/spi-cavium-octeon.c | 100 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 drivers/spi/spi-cavium-octeon.c

(limited to 'drivers/spi/spi-cavium-octeon.c')

diff --git a/drivers/spi/spi-cavium-octeon.c b/drivers/spi/spi-cavium-octeon.c
new file mode 100644
index 0000000000..4511c3b312
--- /dev/null
+++ b/drivers/spi/spi-cavium-octeon.c
@@ -0,0 +1,100 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2011, 2012 Cavium, Inc.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of.h>
+
+#include <asm/octeon/octeon.h>
+
+#include "spi-cavium.h"
+
+static int octeon_spi_probe(struct platform_device *pdev)
+{
+	void __iomem *reg_base;
+	struct spi_controller *host;
+	struct octeon_spi *p;
+	int err = -ENOENT;
+
+	host = spi_alloc_host(&pdev->dev, sizeof(struct octeon_spi));
+	if (!host)
+		return -ENOMEM;
+	p = spi_controller_get_devdata(host);
+	platform_set_drvdata(pdev, host);
+
+	reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(reg_base)) {
+		err = PTR_ERR(reg_base);
+		goto fail;
+	}
+
+	p->register_base = reg_base;
+	p->sys_freq = octeon_get_io_clock_rate();
+
+	p->regs.config = 0;
+	p->regs.status = 0x08;
+	p->regs.tx = 0x10;
+	p->regs.data = 0x80;
+
+	host->num_chipselect = 4;
+	host->mode_bits = SPI_CPHA |
+			    SPI_CPOL |
+			    SPI_CS_HIGH |
+			    SPI_LSB_FIRST |
+			    SPI_3WIRE;
+
+	host->transfer_one_message = octeon_spi_transfer_one_message;
+	host->bits_per_word_mask = SPI_BPW_MASK(8);
+	host->max_speed_hz = OCTEON_SPI_MAX_CLOCK_HZ;
+
+	host->dev.of_node = pdev->dev.of_node;
+	err = devm_spi_register_controller(&pdev->dev, host);
+	if (err) {
+		dev_err(&pdev->dev, "register host failed: %d\n", err);
+		goto fail;
+	}
+
+	dev_info(&pdev->dev, "OCTEON SPI bus driver\n");
+
+	return 0;
+fail:
+	spi_controller_put(host);
+	return err;
+}
+
+static void octeon_spi_remove(struct platform_device *pdev)
+{
+	struct spi_controller *host = platform_get_drvdata(pdev);
+	struct octeon_spi *p = spi_controller_get_devdata(host);
+
+	/* Clear the CSENA* and put everything in a known state. */
+	writeq(0, p->register_base + OCTEON_SPI_CFG(p));
+}
+
+static const struct of_device_id octeon_spi_match[] = {
+	{ .compatible = "cavium,octeon-3010-spi", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, octeon_spi_match);
+
+static struct platform_driver octeon_spi_driver = {
+	.driver = {
+		.name		= "spi-octeon",
+		.of_match_table = octeon_spi_match,
+	},
+	.probe		= octeon_spi_probe,
+	.remove_new	= octeon_spi_remove,
+};
+
+module_platform_driver(octeon_spi_driver);
+
+MODULE_DESCRIPTION("Cavium, Inc. OCTEON SPI bus driver");
+MODULE_AUTHOR("David Daney");
+MODULE_LICENSE("GPL");
-- 
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