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tegra: nyan-big: Add additional clock and kernel init 

We need to turn on all audio-related clocks for the Chrome OS kernel to
boot. Otherwise it will hang when trying to enable audio.

Also for Linux set up graphics driver video protection.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Simon Glass 2015-06-05 14:39:43 -06:00 committed by Tom Warren
parent c96d709f30
commit 7cfde8117f
1 changed files with 69 additions and 0 deletions
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69
board/nvidia/nyan-big/nyan-big.c
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@ -8,7 +8,12 @@
#include <common.h>
#include <errno.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/clock.h>
#include <asm/arch/mc.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/pmc.h>
#include <power/as3722.h>
#include <power/pmic.h>
#include "pinmux-config-nyan-big.h"
@ -57,3 +62,67 @@ int tegra_lcd_pmic_init(int board_id)
return 0;
}
/* Setup required information for Linux kernel */
static void setup_kernel_info(void)
{
struct mc_ctlr *mc = (void *)NV_PA_MC_BASE;
/* The kernel graphics driver needs this region locked down */
writel(0, &mc->mc_video_protect_bom);
writel(0, &mc->mc_video_protect_size_mb);
writel(1, &mc->mc_video_protect_reg_ctrl);
}
/*
* We need to take ALL audio devices conntected to AHUB (AUDIO, APBIF,
* I2S, DAM, AMX, ADX, SPDIF, AFC) out of reset and enable the clocks.
* Otherwise reading AHUB devices will hang when the kernel boots.
*/
static void enable_required_clocks(void)
{
static enum periph_id ids[] = {
PERIPH_ID_I2S0,
PERIPH_ID_I2S1,
PERIPH_ID_I2S2,
PERIPH_ID_I2S3,
PERIPH_ID_I2S4,
PERIPH_ID_AUDIO,
PERIPH_ID_APBIF,
PERIPH_ID_DAM0,
PERIPH_ID_DAM1,
PERIPH_ID_DAM2,
PERIPH_ID_AMX0,
PERIPH_ID_AMX1,
PERIPH_ID_ADX0,
PERIPH_ID_ADX1,
PERIPH_ID_SPDIF,
PERIPH_ID_AFC0,
PERIPH_ID_AFC1,
PERIPH_ID_AFC2,
PERIPH_ID_AFC3,
PERIPH_ID_AFC4,
PERIPH_ID_AFC5,
PERIPH_ID_EXTPERIPH1
};
int i;
for (i = 0; i < ARRAY_SIZE(ids); i++)
clock_enable(ids[i]);
udelay(2);
for (i = 0; i < ARRAY_SIZE(ids); i++)
reset_set_enable(ids[i], 0);
}
int nvidia_board_init(void)
{
clock_start_periph_pll(PERIPH_ID_EXTPERIPH1, CLOCK_ID_OSC, 12000000);
clock_start_periph_pll(PERIPH_ID_I2S1, CLOCK_ID_OSC, 1500000);
/* For external MAX98090 audio codec */
clock_external_output(1);
setup_kernel_info();
enable_required_clocks();
return 0;
}