mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-22 03:27:30 -04:00
Code Issues Packages Projects Releases Wiki Activity

cpufreq: ti: Add EPROBE_DEFER for K3 SoCs

Browse Source 
On K3 SoCs, ti-cpufreq relies on k3-socinfo to register the SoC
device before soc_device_match() can return valid revision
information. If ti-cpufreq probes before k3-socinfo,
soc_device_match() returns NULL, leading to incorrect CPU frequency
scaling behavior.

Add a needs_k3_socinfo flag to ti_cpufreq_soc_data (similar to
the existing multi_regulator pattern) to defer probe when k3-socinfo
hasn't registered the SoC device yet.

Signed-off-by: Akashdeep Kaur <a-kaur@ti.com>
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Akashdeep Kaur
2026-06-03 12:54:38 +05:30
committed by Viresh Kumar
parent 4b5d3b8472
commit b7a76f38ef
1 changed files with 10 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/cpufreq/ti-cpufreq.c
View File

@@ -99,6 +99,7 @@ struct ti_cpufreq_soc_data {
unsigned long efuse_shift;
unsigned long rev_offset;
bool multi_regulator;
bool needs_k3_socinfo;
/* Backward compatibility hack: Might have missing syscon */
#define TI_QUIRK_SYSCON_MAY_BE_MISSING 0x1
/* Backward compatibility hack: new syscon size is 1 register wide */
@@ -347,6 +348,7 @@ static struct ti_cpufreq_soc_data am625_soc_data = {
.efuse_mask = 0x07c0,
.efuse_shift = 0x6,
.multi_regulator = false,
.needs_k3_socinfo = true,
.quirks = TI_QUIRK_SYSCON_IS_SINGLE_REG,
};
@@ -356,6 +358,7 @@ static struct ti_cpufreq_soc_data am62a7_soc_data = {
.efuse_mask = 0x07c0,
.efuse_shift = 0x6,
.multi_regulator = false,
.needs_k3_socinfo = true,
};
static struct ti_cpufreq_soc_data am62l3_soc_data = {
@@ -364,6 +367,7 @@ static struct ti_cpufreq_soc_data am62l3_soc_data = {
.efuse_mask = 0x07c0,
.efuse_shift = 0x6,
.multi_regulator = false,
.needs_k3_socinfo = true,
};
static struct ti_cpufreq_soc_data am62p5_soc_data = {
@@ -372,6 +376,7 @@ static struct ti_cpufreq_soc_data am62p5_soc_data = {
.efuse_mask = 0x07c0,
.efuse_shift = 0x6,
.multi_regulator = false,
.needs_k3_socinfo = true,
};
/**
@@ -443,6 +448,11 @@ static int ti_cpufreq_get_rev(struct ti_cpufreq_data *opp_data,
goto done;
}
/* Defer if k3-socinfo hasn't registered the SoC device yet */
if (opp_data->soc_data->needs_k3_socinfo)
return dev_err_probe(opp_data->cpu_dev, -EPROBE_DEFER,
"SoC device not registered by k3-socinfo\n");
ret = regmap_read(opp_data->syscon, opp_data->soc_data->rev_offset,
&revision);
if (opp_data->soc_data->quirks & TI_QUIRK_SYSCON_MAY_BE_MISSING && ret == -EIO) {