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mfd: ab8500-debug: Function to save all ABB registers to mem

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Dump function that stores all readable ABB registers to a memory
areas where they can be accessed from dump file.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Mattias WALLIN <mattias.wallin@stericsson.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Lee Jones 2013-02-12 14:35:28 +00:00
parent cfc0849c66
commit 5ff9090f3d
1 changed files with 50 additions and 0 deletions
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50
drivers/mfd/ab8500-debugfs.c
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@ -601,6 +601,56 @@ void ab8500_dump_all_banks(struct device *dev)
}
}
/* Space for 500 registers. */
#define DUMP_MAX_REGS 700
struct ab8500_register_dump
{
u8 bank;
u8 reg;
u8 value;
int ret;
} ab8500_complete_register_dump[DUMP_MAX_REGS];
extern int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size);
/* This shall only be called upon kernel panic! */
void ab8500_dump_all_banks_to_mem(void)
{
int i, r = 0;
u8 bank;
pr_info("Saving all ABB registers at \"ab8500_complete_register_dump\" "
"for crash analyze.\n");
for (bank = 1; bank < AB8500_NUM_BANKS; bank++) {
for (i = 0; i < debug_ranges[bank].num_ranges; i++) {
u8 reg;
for (reg = debug_ranges[bank].range[i].first;
reg <= debug_ranges[bank].range[i].last;
reg++) {
u8 value;
int err;
err = prcmu_abb_read(bank, reg, &value, 1);
ab8500_complete_register_dump[r].ret = err;
ab8500_complete_register_dump[r].bank = bank;
ab8500_complete_register_dump[r].reg = reg;
ab8500_complete_register_dump[r].value = value;
r++;
if (r >= DUMP_MAX_REGS) {
pr_err("%s: too many register to dump!\n",
__func__);
return;
}
}
}
}
}
static int ab8500_all_banks_open(struct inode *inode, struct file *file)
{
struct seq_file *s;