input: remove pxa930_trkball driver

The pxa930 SoC support is getting removed, and no upstream
board ever provided the trkball device that this driver
relies on.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-input@vger.kernel.org
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/input/mouse/Kconfig

@@ -393,12 +393,6 @@ config MOUSE_GPIO
 	  To compile this driver as a module, choose M here: the
 	  module will be called gpio_mouse.
 
-config MOUSE_PXA930_TRKBALL
-	tristate "PXA930 Trackball mouse"
-	depends on CPU_PXA930 || CPU_PXA935
-	help
-	  Say Y here to support PXA930 Trackball mouse.
-
 config MOUSE_MAPLE
 	tristate "Maple mouse (for the Dreamcast)"
 	depends on MAPLE

drivers/input/mouse/Makefile

@@ -18,7 +18,6 @@ obj-$(CONFIG_MOUSE_MAPLE)		+= maplemouse.o
 obj-$(CONFIG_MOUSE_NAVPOINT_PXA27x)	+= navpoint.o
 obj-$(CONFIG_MOUSE_PC110PAD)		+= pc110pad.o
 obj-$(CONFIG_MOUSE_PS2)			+= psmouse.o
-obj-$(CONFIG_MOUSE_PXA930_TRKBALL)	+= pxa930_trkball.o
 obj-$(CONFIG_MOUSE_RISCPC)		+= rpcmouse.o
 obj-$(CONFIG_MOUSE_SERIAL)		+= sermouse.o
 obj-$(CONFIG_MOUSE_SYNAPTICS_I2C)	+= synaptics_i2c.o

drivers/input/mouse/pxa930_trkball.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * PXA930 track ball mouse driver
- *
- * Copyright (C) 2007 Marvell International Ltd.
- * 2008-02-28: Yong Yao <yaoyong@marvell.com>
- *             initial version
- */
-
-#include <linux/input.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <linux/platform_data/mouse-pxa930_trkball.h>
-
-/* Trackball Controller Register Definitions */
-#define TBCR		(0x000C)
-#define TBCNTR		(0x0010)
-#define TBSBC		(0x0014)
-
-#define TBCR_TBRST	(1 << 1)
-#define TBCR_TBSB	(1 << 10)
-
-#define TBCR_Y_FLT(n)	(((n) & 0xf) << 6)
-#define TBCR_X_FLT(n)	(((n) & 0xf) << 2)
-
-#define TBCNTR_YM(n)	(((n) >> 24) & 0xff)
-#define TBCNTR_YP(n)	(((n) >> 16) & 0xff)
-#define TBCNTR_XM(n)	(((n) >> 8) & 0xff)
-#define TBCNTR_XP(n)	((n) & 0xff)
-
-#define TBSBC_TBSBC	(0x1)
-
-struct pxa930_trkball {
-	struct pxa930_trkball_platform_data *pdata;
-
-	/* Memory Mapped Register */
-	struct resource *mem;
-	void __iomem *mmio_base;
-
-	struct input_dev *input;
-};
-
-static irqreturn_t pxa930_trkball_interrupt(int irq, void *dev_id)
-{
-	struct pxa930_trkball *trkball = dev_id;
-	struct input_dev *input = trkball->input;
-	int tbcntr, x, y;
-
-	/* According to the spec software must read TBCNTR twice:
-	 * if the read value is the same, the reading is valid
-	 */
-	tbcntr = __raw_readl(trkball->mmio_base + TBCNTR);
-
-	if (tbcntr == __raw_readl(trkball->mmio_base + TBCNTR)) {
-		x = (TBCNTR_XP(tbcntr) - TBCNTR_XM(tbcntr)) / 2;
-		y = (TBCNTR_YP(tbcntr) - TBCNTR_YM(tbcntr)) / 2;
-
-		input_report_rel(input, REL_X, x);
-		input_report_rel(input, REL_Y, y);
-		input_sync(input);
-	}
-
-	__raw_writel(TBSBC_TBSBC, trkball->mmio_base + TBSBC);
-	__raw_writel(0, trkball->mmio_base + TBSBC);
-
-	return IRQ_HANDLED;
-}
-
-/* For TBCR, we need to wait for a while to make sure it has been modified. */
-static int write_tbcr(struct pxa930_trkball *trkball, int v)
-{
-	int i = 100;
-
-	__raw_writel(v, trkball->mmio_base + TBCR);
-
-	while (--i) {
-		if (__raw_readl(trkball->mmio_base + TBCR) == v)
-			break;
-		msleep(1);
-	}
-
-	if (i == 0) {
-		pr_err("%s: timed out writing TBCR(%x)!\n", __func__, v);
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-static void pxa930_trkball_config(struct pxa930_trkball *trkball)
-{
-	uint32_t tbcr;
-
-	/* According to spec, need to write the filters of x,y to 0xf first! */
-	tbcr = __raw_readl(trkball->mmio_base + TBCR);
-	write_tbcr(trkball, tbcr | TBCR_X_FLT(0xf) | TBCR_Y_FLT(0xf));
-	write_tbcr(trkball, TBCR_X_FLT(trkball->pdata->x_filter) |
-			    TBCR_Y_FLT(trkball->pdata->y_filter));
-
-	/* According to spec, set TBCR_TBRST first, before clearing it! */
-	tbcr = __raw_readl(trkball->mmio_base + TBCR);
-	write_tbcr(trkball, tbcr | TBCR_TBRST);
-	write_tbcr(trkball, tbcr & ~TBCR_TBRST);
-
-	__raw_writel(TBSBC_TBSBC, trkball->mmio_base + TBSBC);
-	__raw_writel(0, trkball->mmio_base + TBSBC);
-
-	pr_debug("%s: final TBCR=%x!\n", __func__,
-		 __raw_readl(trkball->mmio_base + TBCR));
-}
-
-static int pxa930_trkball_open(struct input_dev *dev)
-{
-	struct pxa930_trkball *trkball = input_get_drvdata(dev);
-
-	pxa930_trkball_config(trkball);
-
-	return 0;
-}
-
-static void pxa930_trkball_disable(struct pxa930_trkball *trkball)
-{
-	uint32_t tbcr = __raw_readl(trkball->mmio_base + TBCR);
-
-	/* Held in reset, gate the 32-KHz input clock off */
-	write_tbcr(trkball, tbcr | TBCR_TBRST);
-}
-
-static void pxa930_trkball_close(struct input_dev *dev)
-{
-	struct pxa930_trkball *trkball = input_get_drvdata(dev);
-
-	pxa930_trkball_disable(trkball);
-}
-
-static int pxa930_trkball_probe(struct platform_device *pdev)
-{
-	struct pxa930_trkball *trkball;
-	struct input_dev *input;
-	struct resource *res;
-	int irq, error;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return -ENXIO;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "failed to get register memory\n");
-		return -ENXIO;
-	}
-
-	trkball = kzalloc(sizeof(struct pxa930_trkball), GFP_KERNEL);
-	if (!trkball)
-		return -ENOMEM;
-
-	trkball->pdata = dev_get_platdata(&pdev->dev);
-	if (!trkball->pdata) {
-		dev_err(&pdev->dev, "no platform data defined\n");
-		error = -EINVAL;
-		goto failed;
-	}
-
-	trkball->mmio_base = ioremap(res->start, resource_size(res));
-	if (!trkball->mmio_base) {
-		dev_err(&pdev->dev, "failed to ioremap registers\n");
-		error = -ENXIO;
-		goto failed;
-	}
-
-	/* held the module in reset, will be enabled in open() */
-	pxa930_trkball_disable(trkball);
-
-	error = request_irq(irq, pxa930_trkball_interrupt, 0,
-			    pdev->name, trkball);
-	if (error) {
-		dev_err(&pdev->dev, "failed to request irq: %d\n", error);
-		goto failed_free_io;
-	}
-
-	platform_set_drvdata(pdev, trkball);
-
-	input = input_allocate_device();
-	if (!input) {
-		dev_err(&pdev->dev, "failed to allocate input device\n");
-		error = -ENOMEM;
-		goto failed_free_irq;
-	}
-
-	input->name = pdev->name;
-	input->id.bustype = BUS_HOST;
-	input->open = pxa930_trkball_open;
-	input->close = pxa930_trkball_close;
-	input->dev.parent = &pdev->dev;
-	input_set_drvdata(input, trkball);
-
-	trkball->input = input;
-
-	input_set_capability(input, EV_REL, REL_X);
-	input_set_capability(input, EV_REL, REL_Y);
-
-	error = input_register_device(input);
-	if (error) {
-		dev_err(&pdev->dev, "unable to register input device\n");
-		goto failed_free_input;
-	}
-
-	return 0;
-
-failed_free_input:
-	input_free_device(input);
-failed_free_irq:
-	free_irq(irq, trkball);
-failed_free_io:
-	iounmap(trkball->mmio_base);
-failed:
-	kfree(trkball);
-	return error;
-}
-
-static int pxa930_trkball_remove(struct platform_device *pdev)
-{
-	struct pxa930_trkball *trkball = platform_get_drvdata(pdev);
-	int irq = platform_get_irq(pdev, 0);
-
-	input_unregister_device(trkball->input);
-	free_irq(irq, trkball);
-	iounmap(trkball->mmio_base);
-	kfree(trkball);
-
-	return 0;
-}
-
-static struct platform_driver pxa930_trkball_driver = {
-	.driver		= {
-		.name	= "pxa930-trkball",
-	},
-	.probe		= pxa930_trkball_probe,
-	.remove		= pxa930_trkball_remove,
-};
-module_platform_driver(pxa930_trkball_driver);
-
-MODULE_AUTHOR("Yong Yao <yaoyong@marvell.com>");
-MODULE_DESCRIPTION("PXA930 Trackball Mouse Driver");
-MODULE_LICENSE("GPL");

include/linux/platform_data/mouse-pxa930_trkball.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_ARCH_PXA930_TRKBALL_H
-#define __ASM_ARCH_PXA930_TRKBALL_H
-
-struct pxa930_trkball_platform_data {
-	int x_filter;
-	int y_filter;
-};
-
-#endif /* __ASM_ARCH_PXA930_TRKBALL_H */
-