diff options
Diffstat (limited to 'arch/arm/mach-msm')
| -rw-r--r-- | arch/arm/mach-msm/proc_comm.c | 15 | ||||
| -rw-r--r-- | arch/arm/mach-msm/proc_comm.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-msm/smd.c | 7 |
3 files changed, 24 insertions, 1 deletions
diff --git a/arch/arm/mach-msm/proc_comm.c b/arch/arm/mach-msm/proc_comm.c index 1cbdebf57c37..67e701c7f183 100644 --- a/arch/arm/mach-msm/proc_comm.c +++ b/arch/arm/mach-msm/proc_comm.c @@ -114,4 +114,17 @@ int msm_proc_comm(unsigned cmd, unsigned *data1, unsigned *data2) return ret; } - +/* + * We need to wait for the ARM9 to at least partially boot + * up before we can continue. Since the ARM9 does resource + * allocation, if we dont' wait we could end up crashing or in + * and unknown state. This function should be called early to + * wait on the ARM9. + */ +void __init proc_comm_boot_wait(void) +{ + void __iomem *base = MSM_SHARED_RAM_BASE; + + proc_comm_wait_for(base + MDM_STATUS, PCOM_READY); + +} diff --git a/arch/arm/mach-msm/proc_comm.h b/arch/arm/mach-msm/proc_comm.h index 0f5cdd345eb7..12da4cacd4a8 100644 --- a/arch/arm/mach-msm/proc_comm.h +++ b/arch/arm/mach-msm/proc_comm.h @@ -16,6 +16,8 @@ #ifndef _ARCH_ARM_MACH_MSM_PROC_COMM_H_ #define _ARCH_ARM_MACH_MSM_PROC_COMM_H_ +#include <linux/init.h> + enum { PCOM_CMD_IDLE = 0x0, PCOM_CMD_DONE, @@ -251,5 +253,6 @@ enum { (((drvstr) & 0xF) << 17)) int msm_proc_comm(unsigned cmd, unsigned *data1, unsigned *data2); +void __init proc_comm_boot_wait(void); #endif diff --git a/arch/arm/mach-msm/smd.c b/arch/arm/mach-msm/smd.c index de9343ec5cff..cf11d414b425 100644 --- a/arch/arm/mach-msm/smd.c +++ b/arch/arm/mach-msm/smd.c @@ -1001,6 +1001,13 @@ static int __init msm_smd_probe(struct platform_device *pdev) { pr_info("smd_init()\n"); + /* + * If we haven't waited for the ARM9 to boot up till now, + * then we need to wait here. Otherwise this should just + * return immediately. + */ + proc_comm_boot_wait(); + INIT_WORK(&probe_work, smd_channel_probe_worker); if (smd_core_init()) { |