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ARM: drop efm32 platform

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I didn't touch this code since it served as a platform to introduce
ARMv7-M support to Linux. The only known machine that runs Linux has only
4 MiB of RAM (that originally only exists to hold the display's framebuffer).

There are no known users and no further use foreseeable, so drop the
code.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210115155130.185010-2-u.kleine-koenig@pengutronix.de'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Uwe Kleine-König
2021-01-15 16:51:24 +01:00
committed by Arnd Bergmann
parent 665a8799b0
commit cc6111375c
12 changed files with 1 additions and 460 deletions
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arch/arm/include/debug/efm32.S
-45
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@@ -1,45 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2013 Pengutronix
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
*/
#define UARTn_CMD 0x000c
#define UARTn_CMD_TXEN 0x0004
#define UARTn_STATUS 0x0010
#define UARTn_STATUS_TXC 0x0020
#define UARTn_STATUS_TXBL 0x0040
#define UARTn_TXDATA 0x0034
.macro addruart, rx, tmp, tmp2
ldr \rx, =(CONFIG_DEBUG_UART_PHYS)
/*
* enable TX. The driver might disable it to save energy. We
* don't care about disabling at the end as during debug power
* consumption isn't that important.
*/
ldr \tmp, =(UARTn_CMD_TXEN)
str \tmp, [\rx, #UARTn_CMD]
.endm
.macro senduart,rd,rx
strb \rd, [\rx, #UARTn_TXDATA]
.endm
.macro waituartcts,rd,rx
.endm
.macro waituarttxrdy,rd,rx
1001: ldr \rd, [\rx, #UARTn_STATUS]
tst \rd, #UARTn_STATUS_TXBL
beq 1001b
.endm
.macro busyuart,rd,rx
1001: ldr \rd, [\rx, UARTn_STATUS]
tst \rd, #UARTn_STATUS_TXC
bne 1001b
.endm