libpayload: Replace majority of timer drivers with a generic one

Currently every non-x86 platform supported by libpayload needs to
provide its own timer driver. Most of the ones we have accumulated there
look almost identical: For the frequency, return a preset constant. For
the value, read a 32-bit register, possibly read another 32-bit register
and shift+OR it with the previous one, then return that.

Let's replace this with a single .c file that can easily handle all of
those cases. Menuconfig convenience can still be maintained by providing
several presets that select different defaults for the driver's
configuration options (register address(es) and frequency).

Removes an "enabled" check from Samsung MCT driver since coreboot always
unconditionally enables that timer anyway.

CQ-DEPEND=CL:344809
BRANCH=None
BUG=None
TEST=Booted Oak and Veyron, observed how dev-mode delay was still ~30s

Change-Id: I61cb7d2ffd4902aa841c57f9afa9cd991f770acd
Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Id: a036af6
Original-Change-Id: I9784e7c6aa5abd6d92478ea7ec1cf42c9a437546
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/347749
Reviewed-on: https://review.coreboot.org/17023
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

1 files changed, 0 insertions, 42 deletions

diff --git a/payloads/libpayload/drivers/timer/rktimer.c b/payloads/libpayload/drivers/timer/rktimer.c
deleted file mode 100644
index 5b4ce6b24f..0000000000
--- a/payloads/libpayload/drivers/timer/rktimer.c
+++ /dev/null
@@ -1,42 +0,0 @@
-
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2014 Rockchip Electronics
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-#include <arch/io.h>
-#include <libpayload.h>
-#include <stdint.h>
-struct rk_timer {
-	u32 timer_load_count0;
-	u32 timer_load_count1;
-	u32 timer_curr_value0;
-	u32 timer_curr_value1;
-	u32 timer_ctrl_reg;
-	u32 timer_int_status;
-};
-
-uint64_t timer_hz(void)
-{
-	return 24000000;
-}
-
-uint64_t timer_raw_value(void)
-{
-	uint64_t upper;
-	uint64_t lower;
-	struct rk_timer *rk_timer;
-	rk_timer = (struct rk_timer *) CONFIG_LP_TIMER_RK_ADDRESS;
-	lower = (uint64_t) rk_timer->timer_curr_value0;
-	upper = (uint64_t) rk_timer->timer_curr_value1;
-	return (upper << 32) | lower;
-}