Drop three-wire serial (TWS) support

This subsystem has not been converted to driver model, there is only one
driver and only one board that uses it. Drop it and its CONFIG option.

Also drop the rtc4543 RTC driver since it uses TWS.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

5 files changed, 0 insertions, 205 deletions

diff --git a/drivers/Makefile b/drivers/Makefile
index 64c39d3a3e..f16d7fdb4f 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -87,7 +87,6 @@ obj-y += spmi/
 obj-y += sysreset/
 obj-y += timer/
 obj-y += tpm/
-obj-y += twserial/
 obj-y += video/
 obj-y += watchdog/
 obj-$(CONFIG_QE) += qe/
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 87c3d9cae2..438681da7a 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -48,7 +48,6 @@ obj-$(CONFIG_RTC_PCF2127) += pcf2127.o
 obj-$(CONFIG_RTC_PL031) += pl031.o
 obj-$(CONFIG_RTC_PT7C4338) += pt7c4338.o
 obj-$(CONFIG_RTC_RS5C372A) += rs5c372.o
-obj-$(CONFIG_RTC_RTC4543) += rtc4543.o
 obj-$(CONFIG_RTC_RV3029) += rv3029.o
 obj-$(CONFIG_RTC_RX8025) += rx8025.o
 obj-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o
diff --git a/drivers/rtc/rtc4543.c b/drivers/rtc/rtc4543.c
deleted file mode 100644
index 8d36edd65a..0000000000
--- a/drivers/rtc/rtc4543.c
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * (C) Copyright 2008, 2009
- * Andreas Pfefferle, DENX Software Engineering, ap@denx.de.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <asm/io.h>
-#include <common.h>
-#include <command.h>
-#include <config.h>
-#include <rtc.h>
-#include <tws.h>
-
-#if defined(CONFIG_CMD_DATE)
-
-/*
- * Note: The acrobatics below is due to the hideously ingenius idea of
- * the chip designers.  As the chip does not allow register
- * addressing, all values need to be read and written in one go.  Sure
- * enough, the 'wday' field (0-6) is transferred using the economic
- * number of 4 bits right in the middle of the packet.....
- */
-
-int rtc_get(struct rtc_time *tm)
-{
-	int rel = 0;
-	uchar buffer[7];
-
-	memset(buffer, 0, 7);
-
-	/* Read 52 bits into our buffer */
-	tws_read(buffer, 52);
-
-	tm->tm_sec  = bcd2bin( buffer[0] & 0x7F);
-	tm->tm_min  = bcd2bin( buffer[1] & 0x7F);
-	tm->tm_hour = bcd2bin( buffer[2] & 0x3F);
-	tm->tm_wday = bcd2bin( buffer[3] & 0x07);
-	tm->tm_mday = bcd2bin((buffer[3] & 0xF0) >> 4 | (buffer[4] & 0x0F) << 4);
-	tm->tm_mon  = bcd2bin((buffer[4] & 0x30) >> 4 | (buffer[5] & 0x0F) << 4);
-	tm->tm_year = bcd2bin((buffer[5] & 0xF0) >> 4 | (buffer[6] & 0x0F) << 4) + 2000;
-	tm->tm_yday = 0;
-	tm->tm_isdst = 0;
-
-	if (tm->tm_sec & 0x80) {
-		puts("### Warning: RTC Low Voltage - date/time not reliable\n");
-		rel = -1;
-	}
-
-	debug("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
-		tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
-		tm->tm_hour, tm->tm_min, tm->tm_sec);
-
-	return rel;
-}
-
-int rtc_set(struct rtc_time *tm)
-{
-	uchar buffer[7];
-	uchar tmp;
-
-	debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
-		tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
-		tm->tm_hour, tm->tm_min, tm->tm_sec);
-
-	memset(buffer, 0, 7);
-	buffer[0] = bin2bcd(tm->tm_sec);
-	buffer[1] = bin2bcd(tm->tm_min);
-	buffer[2] = bin2bcd(tm->tm_hour);
-	buffer[3] = bin2bcd(tm->tm_wday);
-	tmp = bin2bcd(tm->tm_mday);
-	buffer[3] |= (tmp & 0x0F) << 4;
-	buffer[4] =  (tmp & 0xF0) >> 4;
-	tmp = bin2bcd(tm->tm_mon);
-	buffer[4] |= (tmp & 0x0F) << 4;
-	buffer[5] =  (tmp & 0xF0) >> 4;
-	tmp = bin2bcd(tm->tm_year  % 100);
-	buffer[5] |= (tmp & 0x0F) << 4;
-	buffer[6] =  (tmp & 0xF0) >> 4;
-
-	/* Write the resulting 52 bits to device */
-	tws_write(buffer, 52);
-
-	return 0;
-}
-
-void rtc_reset(void)
-{
-	struct rtc_time tmp;
-
-	tmp.tm_sec = 0;
-	tmp.tm_min = 0;
-	tmp.tm_hour = 0;
-	tmp.tm_wday = 4;
-	tmp.tm_mday = 1;
-	tmp.tm_mon = 1;
-	tmp.tm_year = 2000;
-	rtc_set(&tmp);
-}
-
-#endif
diff --git a/drivers/twserial/Makefile b/drivers/twserial/Makefile
deleted file mode 100644
index 7cc7c4de82..0000000000
--- a/drivers/twserial/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-#
-# (C) Copyright 2009
-# Detlev Zundel, DENX Software Engineering, dzu@denx.de.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-obj-$(CONFIG_SOFT_TWS) += soft_tws.o
diff --git a/drivers/twserial/soft_tws.c b/drivers/twserial/soft_tws.c
deleted file mode 100644
index d0bf93d902..0000000000
--- a/drivers/twserial/soft_tws.c
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * (C) Copyright 2009
- * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#define TWS_IMPLEMENTATION
-#include <common.h>
-
-/*=====================================================================*/
-/*                         Public Functions                            */
-/*=====================================================================*/
-
-/*-----------------------------------------------------------------------
- * Read bits
- */
-int tws_read(uchar *buffer, int len)
-{
-	int rem = len;
-	uchar accu, shift;
-
-	debug("tws_read: buffer %p len %d\n", buffer, len);
-
-	/* Configure the data pin for input */
-	tws_data_config_output(0);
-
-	/* Disable WR, i.e. setup a read */
-	tws_wr(0);
-	udelay(1);
-
-	/* Rise CE */
-	tws_ce(1);
-	udelay(1);
-
-	for (; rem > 0; ) {
-		for (shift = 0, accu = 0;
-		     (rem > 0) && (shift < 8);
-		     rem--, shift++) {
-			tws_clk(1);
-			udelay(10);
-			accu |= (tws_data_read() << shift); /* LSB first */
-			tws_clk(0);
-			udelay(10);
-		}
-		*buffer++ = accu;
-	}
-
-	/* Lower CE */
-	tws_ce(0);
-
-	return len - rem;
-}
-
-
-/*-----------------------------------------------------------------------
- * Write bits
- */
-int tws_write(uchar *buffer, int len)
-{
-	int rem = len;
-	uchar accu, shift;
-
-	debug("tws_write: buffer %p len %d\n", buffer, len);
-
-	/* Configure the data pin for output */
-	tws_data_config_output(1);
-
-	/* Enable WR, i.e. setup a write */
-	tws_wr(1);
-	udelay(1);
-
-	/* Rise CE */
-	tws_ce(1);
-	udelay(1);
-
-	for (; rem > 0; ) {
-		for (shift = 0, accu = *buffer++;
-		     (rem > 0) && (shift < 8);
-		     rem--, shift++) {
-			tws_data(accu & 0x01); /* LSB first */
-			tws_clk(1);
-			udelay(10);
-			tws_clk(0);
-			udelay(10);
-			accu >>= 1;
-		}
-	}
-
-	/* Lower CE */
-	tws_ce(0);
-
-	return len - rem;
-}