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author | 2023-10-10 14:33:42 +0000 | |
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committer | 2023-10-10 14:33:42 +0000 | |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/arch/x86/cpu/baytrail/valleyview.c | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/arch/x86/cpu/baytrail/valleyview.c')
-rw-r--r-- | roms/u-boot/arch/x86/cpu/baytrail/valleyview.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/cpu/baytrail/valleyview.c b/roms/u-boot/arch/x86/cpu/baytrail/valleyview.c new file mode 100644 index 000000000..f73738ce5 --- /dev/null +++ b/roms/u-boot/arch/x86/cpu/baytrail/valleyview.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> + */ + +#include <common.h> +#include <init.h> +#include <mmc.h> +#include <pci_ids.h> +#include <asm/irq.h> +#include <asm/mrccache.h> +#include <asm/post.h> +#include <asm/arch/iomap.h> +#include <linux/bitops.h> + +/* GPIO SUS */ +#define GPIO_SUS_PAD_BASE (IO_BASE_ADDRESS + IO_BASE_OFFSET_GPSSUS) +#define GPIO_SUS_DFX5_CONF0 0x150 +#define BYT_TRIG_LVL BIT(24) +#define BYT_TRIG_POS BIT(25) + +int arch_cpu_init(void) +{ + post_code(POST_CPU_INIT); + + return x86_cpu_init_f(); +} + +int arch_misc_init(void) +{ + if (!ll_boot_init()) + return 0; + +#ifdef CONFIG_ENABLE_MRC_CACHE + /* + * We intend not to check any return value here, as even MRC cache + * is not saved successfully, it is not a severe error that will + * prevent system from continuing to boot. + */ + mrccache_save(); +#endif + + /* + * For some unknown reason, FSP (gold4) for BayTrail configures + * the GPIO DFX5 PAD to enable level interrupt (bit 24 and 25). + * This does not cause any issue when Linux kernel runs w/ or w/o + * the pinctrl driver for BayTrail. However this causes unstable + * S3 resume if the pinctrl driver is included in the kernel build. + * As this pin keeps generating interrupts during an S3 resume, + * and there is no IRQ requester in the kernel to handle it, the + * kernel seems to hang and does not continue resuming. + * + * Clear the mysterious interrupt bits for this pin. + */ + clrbits_le32(GPIO_SUS_PAD_BASE + GPIO_SUS_DFX5_CONF0, + BYT_TRIG_LVL | BYT_TRIG_POS); + + return 0; +} |