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OPP: Allow multiple clocks for a device

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This patch adds support to allow multiple clocks for a device.

The design is pretty much similar to how this is done for regulators,
and platforms can supply their own version of the config_clks() callback
if they have multiple clocks for their device. The core manages the
calls via opp_table->config_clks() eventually.

We have kept both "clk" and "clks" fields in the OPP table structure and
the reason is provided as a comment in _opp_set_clknames(). The same
isn't done for "rates" though and we use rates[0] at most of the places
now.

Co-developed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar
2022-06-10 12:02:04 +05:30
parent 3cb16ad69b
commit 2083da24eb
5 changed files with 246 additions and 83 deletions
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drivers/opp/debugfs.c
+23 -4
View File
@@ -74,6 +74,24 @@ static void opp_debug_create_bw(struct dev_pm_opp *opp,
}
}
static void opp_debug_create_clks(struct dev_pm_opp *opp,
struct opp_table *opp_table,
struct dentry *pdentry)
{
char name[12];
int i;
if (opp_table->clk_count == 1) {
debugfs_create_ulong("rate_hz", S_IRUGO, pdentry, &opp->rates[0]);
return;
}
for (i = 0; i < opp_table->clk_count; i++) {
snprintf(name, sizeof(name), "rate_hz_%d", i);
debugfs_create_ulong(name, S_IRUGO, pdentry, &opp->rates[i]);
}
}
static void opp_debug_create_supplies(struct dev_pm_opp *opp,
struct opp_table *opp_table,
struct dentry *pdentry)
@@ -117,10 +135,11 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
* Get directory name for OPP.
*
* - Normally rate is unique to each OPP, use it to get unique opp-name.
* - For some devices rate isn't available, use index instead.
* - For some devices rate isn't available or there are multiple, use
* index instead for them.
*/
if (likely(opp->rate))
id = opp->rate;
if (likely(opp_table->clk_count == 1 && opp->rates[0]))
id = opp->rates[0];
else
id = _get_opp_count(opp_table);
@@ -134,7 +153,6 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo);
debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend);
debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate);
debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate);
debugfs_create_u32("level", S_IRUGO, d, &opp->level);
debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
&opp->clock_latency_ns);
@@ -142,6 +160,7 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
opp->of_name = of_node_full_name(opp->np);
debugfs_create_str("of_name", S_IRUGO, d, (char **)&opp->of_name);
opp_debug_create_clks(opp, opp_table, d);
opp_debug_create_supplies(opp, opp_table, d);
opp_debug_create_bw(opp, opp_table, d);