[MIPS] rbtx4938: Convert SPI codes to use generic SPI drivers

Use rtc-rs5c348 and at25 spi protocol driver and spi_txx9 spi
controller driver instead of platform dependent codes.

This patch also removes dependencies to old RTC interfaces such as
rtc_mips_get_time, etc.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 1 insertions, 193 deletions

diff --git a/arch/mips/tx4938/common/Makefile b/arch/mips/tx4938/common/Makefile
index 2033ae77f63..83cda518f20 100644
--- a/arch/mips/tx4938/common/Makefile
+++ b/arch/mips/tx4938/common/Makefile
@@ -6,6 +6,6 @@
 # unless it's something special (ie not a .c file).
 #
 
-obj-y	+= prom.o setup.o irq.o rtc_rx5c348.o
+obj-y	+= prom.o setup.o irq.o
 obj-$(CONFIG_KGDB) += dbgio.o
 
diff --git a/arch/mips/tx4938/common/rtc_rx5c348.c b/arch/mips/tx4938/common/rtc_rx5c348.c
deleted file mode 100644
index 07f782fc072..00000000000
--- a/arch/mips/tx4938/common/rtc_rx5c348.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * RTC routines for RICOH Rx5C348 SPI chip.
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/rtc.h>
-#include <linux/time.h>
-#include <linux/bcd.h>
-#include <asm/time.h>
-#include <asm/tx4938/spi.h>
-
-#define	EPOCH		2000
-
-/* registers */
-#define Rx5C348_REG_SECOND	0
-#define Rx5C348_REG_MINUTE	1
-#define Rx5C348_REG_HOUR	2
-#define Rx5C348_REG_WEEK	3
-#define Rx5C348_REG_DAY	4
-#define Rx5C348_REG_MONTH	5
-#define Rx5C348_REG_YEAR	6
-#define Rx5C348_REG_ADJUST	7
-#define Rx5C348_REG_ALARM_W_MIN	8
-#define Rx5C348_REG_ALARM_W_HOUR	9
-#define Rx5C348_REG_ALARM_W_WEEK	10
-#define Rx5C348_REG_ALARM_D_MIN	11
-#define Rx5C348_REG_ALARM_D_HOUR	12
-#define Rx5C348_REG_CTL1	14
-#define Rx5C348_REG_CTL2	15
-
-/* register bits */
-#define Rx5C348_BIT_PM	0x20	/* REG_HOUR */
-#define Rx5C348_BIT_Y2K	0x80	/* REG_MONTH */
-#define Rx5C348_BIT_24H	0x20	/* REG_CTL1 */
-#define Rx5C348_BIT_XSTP	0x10	/* REG_CTL2 */
-
-/* commands */
-#define Rx5C348_CMD_W(addr)	(((addr) << 4) | 0x08)	/* single write */
-#define Rx5C348_CMD_R(addr)	(((addr) << 4) | 0x0c)	/* single read */
-#define Rx5C348_CMD_MW(addr)	(((addr) << 4) | 0x00)	/* burst write */
-#define Rx5C348_CMD_MR(addr)	(((addr) << 4) | 0x04)	/* burst read */
-
-static struct spi_dev_desc srtc_dev_desc = {
-	.baud 		= 1000000,	/* 1.0Mbps @ Vdd 2.0V */
-	.tcss		= 31,
-	.tcsh		= 1,
-	.tcsr		= 62,
-	/* 31us for Tcss (62us for Tcsr) is required for carry operation) */
-	.byteorder	= 1,		/* MSB-First */
-	.polarity	= 0,		/* High-Active */
-	.phase		= 1,		/* Shift-Then-Sample */
-
-};
-static int srtc_chipid;
-static int srtc_24h;
-
-static inline int
-spi_rtc_io(unsigned char *inbuf, unsigned char *outbuf, unsigned int count)
-{
-	unsigned char *inbufs[1], *outbufs[1];
-	unsigned int incounts[2], outcounts[2];
-	inbufs[0] = inbuf;
-	incounts[0] = count;
-	incounts[1] = 0;
-	outbufs[0] = outbuf;
-	outcounts[0] = count;
-	outcounts[1] = 0;
-	return txx9_spi_io(srtc_chipid, &srtc_dev_desc,
-			   inbufs, incounts, outbufs, outcounts, 0);
-}
-
-/* RTC-dependent code for time.c */
-
-static int
-rtc_rx5c348_set_time(unsigned long t)
-{
-	unsigned char inbuf[8];
-	struct rtc_time tm;
-	u8 year, month, day, hour, minute, second, century;
-
-	/* convert */
-	to_tm(t, &tm);
-
-	year = tm.tm_year % 100;
-	month = tm.tm_mon+1;	/* tm_mon starts from 0 to 11 */
-	day = tm.tm_mday;
-	hour = tm.tm_hour;
-	minute = tm.tm_min;
-	second = tm.tm_sec;
-	century = tm.tm_year / 100;
-
-	inbuf[0] = Rx5C348_CMD_MW(Rx5C348_REG_SECOND);
-	BIN_TO_BCD(second);
-	inbuf[1] = second;
-	BIN_TO_BCD(minute);
-	inbuf[2] = minute;
-
-	if (srtc_24h) {
-		BIN_TO_BCD(hour);
-		inbuf[3] = hour;
-	} else {
-		/* hour 0 is AM12, noon is PM12 */
-		inbuf[3] = 0;
-		if (hour >= 12)
-			inbuf[3] = Rx5C348_BIT_PM;
-		hour = (hour + 11) % 12 + 1;
-		BIN_TO_BCD(hour);
-		inbuf[3] |= hour;
-	}
-	inbuf[4] = 0;	/* ignore week */
-	BIN_TO_BCD(day);
-	inbuf[5] = day;
-	BIN_TO_BCD(month);
-	inbuf[6] = month;
-	if (century >= 20)
-		inbuf[6] |= Rx5C348_BIT_Y2K;
-	BIN_TO_BCD(year);
-	inbuf[7] = year;
-	/* write in one transfer to avoid data inconsistency */
-	return spi_rtc_io(inbuf, NULL, 8);
-}
-
-static unsigned long
-rtc_rx5c348_get_time(void)
-{
-	unsigned char inbuf[8], outbuf[8];
-	unsigned int year, month, day, hour, minute, second;
-
-	inbuf[0] = Rx5C348_CMD_MR(Rx5C348_REG_SECOND);
-	memset(inbuf + 1, 0, 7);
-	/* read in one transfer to avoid data inconsistency */
-	if (spi_rtc_io(inbuf, outbuf, 8))
-		return 0;
-	second = outbuf[1];
-	BCD_TO_BIN(second);
-	minute = outbuf[2];
-	BCD_TO_BIN(minute);
-	if (srtc_24h) {
-		hour = outbuf[3];
-		BCD_TO_BIN(hour);
-	} else {
-		hour = outbuf[3] & ~Rx5C348_BIT_PM;
-		BCD_TO_BIN(hour);
-		hour %= 12;
-		if (outbuf[3] & Rx5C348_BIT_PM)
-			hour += 12;
-	}
-	day = outbuf[5];
-	BCD_TO_BIN(day);
-	month = outbuf[6] & ~Rx5C348_BIT_Y2K;
-	BCD_TO_BIN(month);
-	year = outbuf[7];
-	BCD_TO_BIN(year);
-	year += EPOCH;
-
-	return mktime(year, month, day, hour, minute, second);
-}
-
-void __init
-rtc_rx5c348_init(int chipid)
-{
-	unsigned char inbuf[2], outbuf[2];
-	srtc_chipid = chipid;
-	/* turn on RTC if it is not on */
-	inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL2);
-	inbuf[1] = 0;
-	spi_rtc_io(inbuf, outbuf, 2);
-	if (outbuf[1] & Rx5C348_BIT_XSTP) {
-		inbuf[0] = Rx5C348_CMD_W(Rx5C348_REG_CTL2);
-		inbuf[1] = 0;
-		spi_rtc_io(inbuf, NULL, 2);
-	}
-
-	inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL1);
-	inbuf[1] = 0;
-	spi_rtc_io(inbuf, outbuf, 2);
-	if (outbuf[1] & Rx5C348_BIT_24H)
-		srtc_24h = 1;
-
-	/* set the function pointers */
-	rtc_mips_get_time = rtc_rx5c348_get_time;
-	rtc_mips_set_time = rtc_rx5c348_set_time;
-}