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33c413c679
* Rework patches for sunxi 5.15.4
* Rework patches sunxi for 5.15.5
* Kernel switch tag=v5.15.5 for sunxi EDGE
* Temporarily disabled, requires rework.
drivers/clk/sunxi-ng/sun8i-de33.c: In function ‘sunxi_de33_clk_probe’:
drivers/clk/sunxi-ng/sun8i-de33.c:155:8:
error: implicit declaration of function ‘sunxi_ccu_probe’;
did you mean ‘of_sunxi_ccu_probe’? [-Werror=implicit-function-declarati>
ret = sunxi_ccu_probe(pdev->dev.of_node, reg, ccu_desc);
^~~~~~~~~~~~~~~
of_sunxi_ccu_probe
cc1: some warnings being treated as errors
make[3]: *** [scripts/Makefile.build:277:
drivers/clk/sunxi-ng/sun8i-de33.o] Error 1
make[2]: *** [scripts/Makefile.build:540: drivers/clk/sunxi-ng] Error 2
* Correct the comment.
72 lines
2.5 KiB
Diff
72 lines
2.5 KiB
Diff
From 2ca5ff6734e0aa59b8f6979da2252dc919837fe6 Mon Sep 17 00:00:00 2001
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From: Samuel Holland <samuel@sholland.org>
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Date: Sat, 3 Apr 2021 17:07:13 -0500
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Subject: [PATCH 410/467] PM / devfreq: Add a recommended frequency helper
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This helper peforms the same function as devfreq_recommended_opp().
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However, it works on devices without OPPs by iterating over freq_table.
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Since freq_table is assumed to be sorted in ascending order, the
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algorithm is relatively simple.
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Devices with OPPs should continue using devfreq_recommended_opp(), as
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that function respects disabled OPPs.
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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---
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drivers/devfreq/devfreq.c | 25 +++++++++++++++++++++++++
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include/linux/devfreq.h | 2 ++
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2 files changed, 27 insertions(+)
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diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
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index 9606eab1a..ea1126c31 100644
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--- a/drivers/devfreq/devfreq.c
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+++ b/drivers/devfreq/devfreq.c
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@@ -1984,6 +1984,31 @@ subsys_initcall(devfreq_init);
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* OPP framework.
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*/
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+/**
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+ * devfreq_recommended_freq() - Helper function to get the proper frequency from
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+ * freq_table for the value given to target callback.
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+ * @devfreq: The devfreq device.
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+ * @freq: The frequency given to target function.
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+ * @flags: Flags handed from devfreq framework.
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+ */
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+void devfreq_recommended_freq(struct devfreq *devfreq,
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+ unsigned long *freq, u32 flags)
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+{
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+ const unsigned long *min = devfreq->profile->freq_table;
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+ const unsigned long *max = min + devfreq->profile->max_state - 1;
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+ const unsigned long *f;
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+
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+ if (flags & DEVFREQ_FLAG_LEAST_UPPER_BOUND) {
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+ /* Find the first item lower than freq, or else min. */
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+ for (f = max; f > min && *f > *freq; --f);
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+ } else {
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+ /* Find the first item higher than freq, or else max. */
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+ for (f = min; f < max && *f < *freq; ++f);
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+ }
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+ *freq = *f;
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+}
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+EXPORT_SYMBOL(devfreq_recommended_freq);
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+
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/**
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* devfreq_recommended_opp() - Helper function to get proper OPP for the
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* freq value given to target callback.
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diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
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index 142474b4a..4d324fea8 100644
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--- a/include/linux/devfreq.h
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+++ b/include/linux/devfreq.h
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@@ -239,6 +239,8 @@ void devfreq_resume(void);
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int update_devfreq(struct devfreq *devfreq);
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/* Helper functions for devfreq user device driver with OPP. */
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+void devfreq_recommended_freq(struct devfreq *devfreq,
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+ unsigned long *freq, u32 flags);
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struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
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unsigned long *freq, u32 flags);
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int devfreq_register_opp_notifier(struct device *dev,
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--
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2.34.0
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