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regulator: rpmh-regulator: Add IPC logging for RPMh regulator votes

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Add support to record a limited number of the most recent RPMh regulator
votes in an IPC log. This can be useful for debug in case there is a
requirement to see the last few RPMh regulator votes at any given time.

Change-Id: I2f57d8abc6acf3260172c9adf24936cdd2d2bf58
Signed-off-by: Jishnu Prakash <quic_jprakash@quicinc.com>
This commit is contained in:
Jishnu Prakash 2022-12-25 19:57:23 +05:30
parent 04e54ad4ca
commit 5f08487df0
1 changed files with 15 additions and 1 deletions
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16
drivers/regulator/rpmh-regulator.c
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@ -6,6 +6,7 @@
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/ipc_logging.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
@ -130,6 +131,16 @@ enum rpmh_regulator_reg_index {
/* XOB voting registers are found in the VRM hardware module */
#define CMD_DB_HW_XOB CMD_DB_HW_VRM
#define IPC_LOG_PAGES 10
#define rpmh_reg_dbg(fmt, ...) \
do { \
ipc_log_string(rpmh_reg_ipc_log, fmt, ##__VA_ARGS__); \
pr_debug(fmt, ##__VA_ARGS__); \
} while (0)
static void *rpmh_reg_ipc_log;
/**
* struct rpmh_regulator_request - rpmh request data
* @reg: Array of RPMh accelerator register values
@ -596,7 +607,7 @@ static void rpmh_regulator_req(struct rpmh_vreg *vreg,
}
}
pr_debug("%s\n", buf);
rpmh_reg_dbg("%s\n", buf);
}
/**
@ -2093,11 +2104,14 @@ static struct platform_driver rpmh_regulator_driver = {
static int rpmh_regulator_init(void)
{
rpmh_reg_ipc_log = ipc_log_context_create(IPC_LOG_PAGES, "rpmh_regulator", 0);
return platform_driver_register(&rpmh_regulator_driver);
}
static void rpmh_regulator_exit(void)
{
if (rpmh_reg_ipc_log)
ipc_log_context_destroy(rpmh_reg_ipc_log);
platform_driver_unregister(&rpmh_regulator_driver);
}