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Commit 5ff9090f authored by Lee Jones's avatar Lee Jones
Browse files

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



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

Signed-off-by: default avatarJonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Reviewed-by: default avatarMattias WALLIN <mattias.wallin@stericsson.com>
Acked-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent cfc0849c

drivers/mfd/ab8500-debugfs.c

+50 −0
Original line number Diff line number Diff line
@@ -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;