Message-Id: <20180118185811.12856-1-clabbe.montjoie@gmail.com>
Date:   Thu, 18 Jan 2018 19:58:11 +0100
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     dmitry.torokhov@...il.com, egtvedt@...fundet.no
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Corentin Labbe <clabbe.montjoie@...il.com>
Subject: [PATCH] input: remove at32psif

Since AVR32 arch is gone, at32psif driver is useless.
This patch remove it.

Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
---
 drivers/input/serio/Kconfig    |  10 --
 drivers/input/serio/Makefile   |   1 -
 drivers/input/serio/at32psif.c | 357 -----------------------------------------
 3 files changed, 368 deletions(-)
 delete mode 100644 drivers/input/serio/at32psif.c

diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
index 21488c048fa3..ca4530eb3378 100644
--- a/drivers/input/serio/Kconfig
+++ b/drivers/input/serio/Kconfig
@@ -96,16 +96,6 @@ config SERIO_RPCKBD
 	  To compile this driver as a module, choose M here: the
 	  module will be called rpckbd.
 
-config SERIO_AT32PSIF
-	tristate "AVR32 PSIF PS/2 keyboard and mouse controller"
-	depends on AVR32
-	help
-	  Say Y here if you want to use the PSIF peripheral on AVR32 devices
-	  and connect a PS/2 keyboard and/or mouse to it.
-
-	  To compile this driver as a module, choose M here: the module will
-	  be called at32psif.
-
 config SERIO_AMBAKMI
 	tristate "AMBA KMI keyboard controller"
 	depends on ARM_AMBA
diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile
index a3ca07621542..67950a5ccb3f 100644
--- a/drivers/input/serio/Makefile
+++ b/drivers/input/serio/Makefile
@@ -13,7 +13,6 @@ obj-$(CONFIG_SERIO_CT82C710)	+= ct82c710.o
 obj-$(CONFIG_SERIO_RPCKBD)	+= rpckbd.o
 obj-$(CONFIG_SERIO_SA1111)	+= sa1111ps2.o
 obj-$(CONFIG_SERIO_AMBAKMI)	+= ambakmi.o
-obj-$(CONFIG_SERIO_AT32PSIF)	+= at32psif.o
 obj-$(CONFIG_SERIO_Q40KBD)	+= q40kbd.o
 obj-$(CONFIG_SERIO_GSCPS2)	+= gscps2.o
 obj-$(CONFIG_HP_SDC)		+= hp_sdc.o
diff --git a/drivers/input/serio/at32psif.c b/drivers/input/serio/at32psif.c
deleted file mode 100644
index e420fd781d44..000000000000
--- a/drivers/input/serio/at32psif.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/*
- * Copyright (C) 2007 Atmel Corporation
- *
- * Driver for the AT32AP700X PS/2 controller (PSIF).
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/serio.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-/* PSIF register offsets */
-#define PSIF_CR				0x00
-#define PSIF_RHR			0x04
-#define PSIF_THR			0x08
-#define PSIF_SR				0x10
-#define PSIF_IER			0x14
-#define PSIF_IDR			0x18
-#define PSIF_IMR			0x1c
-#define PSIF_PSR			0x24
-
-/* Bitfields in control register. */
-#define PSIF_CR_RXDIS_OFFSET		1
-#define PSIF_CR_RXDIS_SIZE		1
-#define PSIF_CR_RXEN_OFFSET		0
-#define PSIF_CR_RXEN_SIZE		1
-#define PSIF_CR_SWRST_OFFSET		15
-#define PSIF_CR_SWRST_SIZE		1
-#define PSIF_CR_TXDIS_OFFSET		9
-#define PSIF_CR_TXDIS_SIZE		1
-#define PSIF_CR_TXEN_OFFSET		8
-#define PSIF_CR_TXEN_SIZE		1
-
-/* Bitfields in interrupt disable, enable, mask and status register. */
-#define PSIF_NACK_OFFSET		8
-#define PSIF_NACK_SIZE			1
-#define PSIF_OVRUN_OFFSET		5
-#define PSIF_OVRUN_SIZE			1
-#define PSIF_PARITY_OFFSET		9
-#define PSIF_PARITY_SIZE		1
-#define PSIF_RXRDY_OFFSET		4
-#define PSIF_RXRDY_SIZE			1
-#define PSIF_TXEMPTY_OFFSET		1
-#define PSIF_TXEMPTY_SIZE		1
-#define PSIF_TXRDY_OFFSET		0
-#define PSIF_TXRDY_SIZE			1
-
-/* Bitfields in prescale register. */
-#define PSIF_PSR_PRSCV_OFFSET		0
-#define PSIF_PSR_PRSCV_SIZE		12
-
-/* Bitfields in receive hold register. */
-#define PSIF_RHR_RXDATA_OFFSET		0
-#define PSIF_RHR_RXDATA_SIZE		8
-
-/* Bitfields in transmit hold register. */
-#define PSIF_THR_TXDATA_OFFSET		0
-#define PSIF_THR_TXDATA_SIZE		8
-
-/* Bit manipulation macros */
-#define PSIF_BIT(name)					\
-	(1 << PSIF_##name##_OFFSET)
-
-#define PSIF_BF(name, value)				\
-	(((value) & ((1 << PSIF_##name##_SIZE) - 1))	\
-	 << PSIF_##name##_OFFSET)
-
-#define PSIF_BFEXT(name, value)				\
-	(((value) >> PSIF_##name##_OFFSET)		\
-	 & ((1 << PSIF_##name##_SIZE) - 1))
-
-#define PSIF_BFINS(name, value, old)			\
-	(((old) & ~(((1 << PSIF_##name##_SIZE) - 1)	\
-		    << PSIF_##name##_OFFSET))		\
-	 | PSIF_BF(name, value))
-
-/* Register access macros */
-#define psif_readl(port, reg)				\
-	__raw_readl((port)->regs + PSIF_##reg)
-
-#define psif_writel(port, reg, value)			\
-	__raw_writel((value), (port)->regs + PSIF_##reg)
-
-struct psif {
-	struct platform_device	*pdev;
-	struct clk		*pclk;
-	struct serio		*io;
-	void __iomem		*regs;
-	unsigned int		irq;
-	/* Prevent concurrent writes to PSIF THR. */
-	spinlock_t		lock;
-	bool			open;
-};
-
-static irqreturn_t psif_interrupt(int irq, void *_ptr)
-{
-	struct psif *psif = _ptr;
-	int retval = IRQ_NONE;
-	unsigned int io_flags = 0;
-	unsigned long status;
-
-	status = psif_readl(psif, SR);
-
-	if (status & PSIF_BIT(RXRDY)) {
-		unsigned char val = (unsigned char) psif_readl(psif, RHR);
-
-		if (status & PSIF_BIT(PARITY))
-			io_flags |= SERIO_PARITY;
-		if (status & PSIF_BIT(OVRUN))
-			dev_err(&psif->pdev->dev, "overrun read error\n");
-
-		serio_interrupt(psif->io, val, io_flags);
-
-		retval = IRQ_HANDLED;
-	}
-
-	return retval;
-}
-
-static int psif_write(struct serio *io, unsigned char val)
-{
-	struct psif *psif = io->port_data;
-	unsigned long flags;
-	int timeout = 10;
-	int retval = 0;
-
-	spin_lock_irqsave(&psif->lock, flags);
-
-	while (!(psif_readl(psif, SR) & PSIF_BIT(TXEMPTY)) && timeout--)
-		udelay(50);
-
-	if (timeout >= 0) {
-		psif_writel(psif, THR, val);
-	} else {
-		dev_dbg(&psif->pdev->dev, "timeout writing to THR\n");
-		retval = -EBUSY;
-	}
-
-	spin_unlock_irqrestore(&psif->lock, flags);
-
-	return retval;
-}
-
-static int psif_open(struct serio *io)
-{
-	struct psif *psif = io->port_data;
-	int retval;
-
-	retval = clk_enable(psif->pclk);
-	if (retval)
-		return retval;
-
-	psif_writel(psif, CR, PSIF_BIT(CR_TXEN) | PSIF_BIT(CR_RXEN));
-	psif_writel(psif, IER, PSIF_BIT(RXRDY));
-
-	psif->open = true;
-	return retval;
-}
-
-static void psif_close(struct serio *io)
-{
-	struct psif *psif = io->port_data;
-
-	psif->open = false;
-
-	psif_writel(psif, IDR, ~0UL);
-	psif_writel(psif, CR, PSIF_BIT(CR_TXDIS) | PSIF_BIT(CR_RXDIS));
-
-	clk_disable(psif->pclk);
-}
-
-static void psif_set_prescaler(struct psif *psif)
-{
-	unsigned long prscv;
-	unsigned long rate = clk_get_rate(psif->pclk);
-
-	/* PRSCV = Pulse length (100 us) * PSIF module frequency. */
-	prscv = 100 * (rate / 1000000UL);
-
-	if (prscv > ((1<<PSIF_PSR_PRSCV_SIZE) - 1)) {
-		prscv = (1<<PSIF_PSR_PRSCV_SIZE) - 1;
-		dev_dbg(&psif->pdev->dev, "pclk too fast, "
-				"prescaler set to max\n");
-	}
-
-	clk_enable(psif->pclk);
-	psif_writel(psif, PSR, prscv);
-	clk_disable(psif->pclk);
-}
-
-static int __init psif_probe(struct platform_device *pdev)
-{
-	struct resource *regs;
-	struct psif *psif;
-	struct serio *io;
-	struct clk *pclk;
-	int irq;
-	int ret;
-
-	psif = kzalloc(sizeof(struct psif), GFP_KERNEL);
-	if (!psif)
-		return -ENOMEM;
-	psif->pdev = pdev;
-
-	io = kzalloc(sizeof(struct serio), GFP_KERNEL);
-	if (!io) {
-		ret = -ENOMEM;
-		goto out_free_psif;
-	}
-	psif->io = io;
-
-	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		dev_dbg(&pdev->dev, "no mmio resources defined\n");
-		ret = -ENOMEM;
-		goto out_free_io;
-	}
-
-	psif->regs = ioremap(regs->start, resource_size(regs));
-	if (!psif->regs) {
-		ret = -ENOMEM;
-		dev_dbg(&pdev->dev, "could not map I/O memory\n");
-		goto out_free_io;
-	}
-
-	pclk = clk_get(&pdev->dev, "pclk");
-	if (IS_ERR(pclk)) {
-		dev_dbg(&pdev->dev, "could not get peripheral clock\n");
-		ret = PTR_ERR(pclk);
-		goto out_iounmap;
-	}
-	psif->pclk = pclk;
-
-	/* Reset the PSIF to enter at a known state. */
-	ret = clk_enable(pclk);
-	if (ret) {
-		dev_dbg(&pdev->dev, "could not enable pclk\n");
-		goto out_put_clk;
-	}
-	psif_writel(psif, CR, PSIF_BIT(CR_SWRST));
-	clk_disable(pclk);
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_dbg(&pdev->dev, "could not get irq\n");
-		ret = -ENXIO;
-		goto out_put_clk;
-	}
-	ret = request_irq(irq, psif_interrupt, IRQF_SHARED, "at32psif", psif);
-	if (ret) {
-		dev_dbg(&pdev->dev, "could not request irq %d\n", irq);
-		goto out_put_clk;
-	}
-	psif->irq = irq;
-
-	io->id.type	= SERIO_8042;
-	io->write	= psif_write;
-	io->open	= psif_open;
-	io->close	= psif_close;
-	snprintf(io->name, sizeof(io->name), "AVR32 PS/2 port%d", pdev->id);
-	snprintf(io->phys, sizeof(io->phys), "at32psif/serio%d", pdev->id);
-	io->port_data	= psif;
-	io->dev.parent	= &pdev->dev;
-
-	psif_set_prescaler(psif);
-
-	spin_lock_init(&psif->lock);
-	serio_register_port(psif->io);
-	platform_set_drvdata(pdev, psif);
-
-	dev_info(&pdev->dev, "Atmel AVR32 PSIF PS/2 driver on 0x%08x irq %d\n",
-			(int)psif->regs, psif->irq);
-
-	return 0;
-
-out_put_clk:
-	clk_put(psif->pclk);
-out_iounmap:
-	iounmap(psif->regs);
-out_free_io:
-	kfree(io);
-out_free_psif:
-	kfree(psif);
-	return ret;
-}
-
-static int __exit psif_remove(struct platform_device *pdev)
-{
-	struct psif *psif = platform_get_drvdata(pdev);
-
-	psif_writel(psif, IDR, ~0UL);
-	psif_writel(psif, CR, PSIF_BIT(CR_TXDIS) | PSIF_BIT(CR_RXDIS));
-
-	serio_unregister_port(psif->io);
-	iounmap(psif->regs);
-	free_irq(psif->irq, psif);
-	clk_put(psif->pclk);
-	kfree(psif);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int psif_suspend(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct psif *psif = platform_get_drvdata(pdev);
-
-	if (psif->open) {
-		psif_writel(psif, CR, PSIF_BIT(CR_RXDIS) | PSIF_BIT(CR_TXDIS));
-		clk_disable(psif->pclk);
-	}
-
-	return 0;
-}
-
-static int psif_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct psif *psif = platform_get_drvdata(pdev);
-
-	if (psif->open) {
-		clk_enable(psif->pclk);
-		psif_set_prescaler(psif);
-		psif_writel(psif, CR, PSIF_BIT(CR_RXEN) | PSIF_BIT(CR_TXEN));
-	}
-
-	return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(psif_pm_ops, psif_suspend, psif_resume);
-
-static struct platform_driver psif_driver = {
-	.remove		= __exit_p(psif_remove),
-	.driver		= {
-		.name	= "atmel_psif",
-		.pm	= &psif_pm_ops,
-	},
-};
-
-module_platform_driver_probe(psif_driver, psif_probe);
-
-MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@...fundet.no>");
-MODULE_DESCRIPTION("Atmel AVR32 PSIF PS/2 driver");
-MODULE_LICENSE("GPL");
-- 
2.13.6

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