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https://github.com/brain-hackers/u-boot-brain
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13634bb658
Commit fe97471632 ("rockchip: rk3288: Allow setting up clocks in
U-Boot proper") fixes some clock issues when chainloading U-Boot on
rk3288 chromebooks. Part of that change is still available in veyron's
board_early_init_r() function. Since chain-loading U-Boot proper from
vendor firmware is possible on gru boards as well, do the same thing for
them too.
On rk3399, this needs to detect whether SPL was run via handoff, so
enable that and bloblist kconfigs it needs for chromebook_bob.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang<kever.yang@rock-chips.com>
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018 Google
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*/
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#include <common.h>
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#include <dm.h>
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#include <init.h>
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#ifdef CONFIG_SPL_BUILD
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/* provided to defeat compiler optimisation in board_init_f() */
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void gru_dummy_function(int i)
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{
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}
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int board_early_init_f(void)
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{
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# ifdef CONFIG_TARGET_CHROMEBOOK_BOB
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int sum, i;
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/*
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* Add a delay and ensure that the compiler does not optimise this out.
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* This is needed since the power rails tail a while to turn on, and
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* we get garbage serial output otherwise.
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*/
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sum = 0;
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for (i = 0; i < 150000; i++)
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sum += i;
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gru_dummy_function(sum);
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#endif /* CONFIG_TARGET_CHROMEBOOK_BOB */
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return 0;
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}
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#endif
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#ifndef CONFIG_SPL_BUILD
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int board_early_init_r(void)
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{
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struct udevice *clk;
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int ret;
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/*
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* This init is done in SPL, but when chain-loading U-Boot SPL will
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* have been skipped. Allow the clock driver to check if it needs
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* setting up.
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*/
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ret = uclass_get_device_by_driver(UCLASS_CLK,
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DM_GET_DRIVER(clk_rk3399), &clk);
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if (ret) {
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debug("%s: CLK init failed: %d\n", __func__, ret);
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return ret;
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}
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return 0;
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}
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#endif
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