ARM: remove w90x900 platform

This removes the old Winbond w90x900 platform, also known
as Nuvoton NUC900. Wan Zongshun originally contributed
the port and maintained it since then.

From all I can tell, this platform is no longer being used
with modern kernels, based on various indications:

- The supported chips (nuc910/950/960) are no longer marketed
  by the manufacturer

- Newer chips from the same family (nuc97x, nuc980, n329x)
  that are still marketed have Linux BSPs but those were never
  submitted for upstream inclusion.

- The last patch from the platform maintainer was in 2011.

- All patches to w90x900 platform specific files afterwards
  are cleanups that were apparently done without access to
  test hardware.

- Both the website and the email address listed in the
  MAINTAINERS have become unreachable.

Link: https://lore.kernel.org/r/20190809202749.742267-17-arnd@arndb.de
Cc: "Wanzongshun (Vincent)" <wanzongshun@huawei.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 197 deletions

diff --git a/arch/arm/mach-w90x900/mfp.c b/arch/arm/mach-w90x900/mfp.c
deleted file mode 100644
index 05f3779a3618..000000000000
--- a/arch/arm/mach-w90x900/mfp.c
+++ /dev/null
@@ -1,197 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * linux/arch/arm/mach-w90x900/mfp.c
- *
- * Copyright (c) 2008 Nuvoton technology corporation
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/string.h>
-#include <linux/clk.h>
-#include <linux/mutex.h>
-#include <linux/io.h>
-
-#include <mach/hardware.h>
-
-#define REG_MFSEL	(W90X900_VA_GCR + 0xC)
-
-#define GPSELF		(0x01 << 1)
-#define GPSELC		(0x03 << 2)
-#define GPSELD		(0x0f << 4)
-
-#define GPSELEI0	(0x01 << 26)
-#define GPSELEI1	(0x01 << 27)
-
-#define GPIOG0TO1	(0x03 << 14)
-#define GPIOG2TO3	(0x03 << 16)
-#define GPIOG22TO23	(0x03 << 22)
-#define GPIOG18TO20	(0x07 << 18)
-
-#define ENSPI		(0x0a << 14)
-#define ENI2C0		(0x01 << 14)
-#define ENI2C1		(0x01 << 16)
-#define ENAC97		(0x02 << 22)
-#define ENSD1		(0x02 << 18)
-#define ENSD0		(0x0a << 4)
-#define ENKPI		(0x02 << 2)
-#define ENNAND		(0x01 << 2)
-
-static DEFINE_MUTEX(mfp_mutex);
-
-void mfp_set_groupf(struct device *dev)
-{
-	unsigned long mfpen;
-	const char *dev_id;
-
-	BUG_ON(!dev);
-
-	mutex_lock(&mfp_mutex);
-
-	dev_id = dev_name(dev);
-
-	mfpen = __raw_readl(REG_MFSEL);
-
-	if (strcmp(dev_id, "nuc900-emc") == 0)
-		mfpen |= GPSELF;/*enable mac*/
-	else
-		mfpen &= ~GPSELF;/*GPIOF[9:0]*/
-
-	__raw_writel(mfpen, REG_MFSEL);
-
-	mutex_unlock(&mfp_mutex);
-}
-EXPORT_SYMBOL(mfp_set_groupf);
-
-void mfp_set_groupc(struct device *dev)
-{
-	unsigned long mfpen;
-	const char *dev_id;
-
-	BUG_ON(!dev);
-
-	mutex_lock(&mfp_mutex);
-
-	dev_id = dev_name(dev);
-
-	mfpen = __raw_readl(REG_MFSEL);
-
-	if (strcmp(dev_id, "nuc900-lcd") == 0)
-		mfpen |= GPSELC;/*enable lcd*/
-	else if (strcmp(dev_id, "nuc900-kpi") == 0) {
-		mfpen &= (~GPSELC);/*enable kpi*/
-		mfpen |= ENKPI;
-	} else if (strcmp(dev_id, "nuc900-nand") == 0) {
-		mfpen &= (~GPSELC);/*enable nand*/
-		mfpen |= ENNAND;
-	} else
-		mfpen &= (~GPSELC);/*GPIOC[14:0]*/
-
-	__raw_writel(mfpen, REG_MFSEL);
-
-	mutex_unlock(&mfp_mutex);
-}
-EXPORT_SYMBOL(mfp_set_groupc);
-
-void mfp_set_groupi(struct device *dev)
-{
-	unsigned long mfpen;
-	const char *dev_id;
-
-	BUG_ON(!dev);
-
-	mutex_lock(&mfp_mutex);
-
-	dev_id = dev_name(dev);
-
-	mfpen = __raw_readl(REG_MFSEL);
-
-	mfpen &= ~GPSELEI1;/*default gpio16*/
-
-	if (strcmp(dev_id, "nuc900-wdog") == 0)
-		mfpen |= GPSELEI1;/*enable wdog*/
-	else if (strcmp(dev_id, "nuc900-atapi") == 0)
-		mfpen |= GPSELEI0;/*enable atapi*/
-	else if (strcmp(dev_id, "nuc900-keypad") == 0)
-		mfpen &= ~GPSELEI0;/*enable keypad*/
-
-	__raw_writel(mfpen, REG_MFSEL);
-
-	mutex_unlock(&mfp_mutex);
-}
-EXPORT_SYMBOL(mfp_set_groupi);
-
-void mfp_set_groupg(struct device *dev, const char *subname)
-{
-	unsigned long mfpen;
-	const char *dev_id;
-
-	BUG_ON((!dev) && (!subname));
-
-	mutex_lock(&mfp_mutex);
-
-	if (subname != NULL)
-		dev_id = subname;
-	else
-		dev_id = dev_name(dev);
-
-	mfpen = __raw_readl(REG_MFSEL);
-
-	if (strcmp(dev_id, "nuc900-spi") == 0) {
-		mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
-		mfpen |= ENSPI;/*enable spi*/
-	} else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
-		mfpen &= ~(GPIOG0TO1);
-		mfpen |= ENI2C0;/*enable i2c0*/
-	} else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
-		mfpen &= ~(GPIOG2TO3);
-		mfpen |= ENI2C1;/*enable i2c1*/
-	} else if (strcmp(dev_id, "nuc900-ac97") == 0) {
-		mfpen &= ~(GPIOG22TO23);
-		mfpen |= ENAC97;/*enable AC97*/
-	} else if (strcmp(dev_id, "nuc900-mmc-port1") == 0) {
-		mfpen &= ~(GPIOG18TO20);
-		mfpen |= (ENSD1 | 0x01);/*enable sd1*/
-	} else {
-		mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
-	}
-
-	__raw_writel(mfpen, REG_MFSEL);
-
-	mutex_unlock(&mfp_mutex);
-}
-EXPORT_SYMBOL(mfp_set_groupg);
-
-void mfp_set_groupd(struct device *dev, const char *subname)
-{
-	unsigned long mfpen;
-	const char *dev_id;
-
-	BUG_ON((!dev) && (!subname));
-
-	mutex_lock(&mfp_mutex);
-
-	if (subname != NULL)
-		dev_id = subname;
-	else
-		dev_id = dev_name(dev);
-
-	mfpen = __raw_readl(REG_MFSEL);
-
-	if (strcmp(dev_id, "nuc900-mmc-port0") == 0) {
-		mfpen &= ~GPSELD;/*enable sd0*/
-		mfpen |= ENSD0;
-	} else
-		mfpen &= (~GPSELD);
-
-	__raw_writel(mfpen, REG_MFSEL);
-
-	mutex_unlock(&mfp_mutex);
-}
-EXPORT_SYMBOL(mfp_set_groupd);