diff options
Diffstat (limited to 'target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch')
-rw-r--r-- | target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch b/target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch deleted file mode 100644 index 9efbd583b4..0000000000 --- a/target/linux/ipq806x/patches-5.10/0049-PM-OPP-Support-adjusting-OPP-voltages-at-runtime.patch +++ /dev/null @@ -1,153 +0,0 @@ -From: Sylwester Nawrocki <s.nawrocki@samsung.com> -To: krzk@kernel.org, vireshk@kernel.org, robh+dt@kernel.org -Cc: sboyd@kernel.org, roger.lu@mediatek.com, - linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, - linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, - b.zolnierkie@samsung.com, m.szyprowski@samsung.com, - Stephen Boyd <sboyd@codeaurora.org>, - Sylwester Nawrocki <s.nawrocki@samsung.com> -Subject: [PATCH v5 1/4] PM / OPP: Support adjusting OPP voltages at runtime -Date: Wed, 16 Oct 2019 16:57:53 +0200 -Message-ID: <20191016145756.16004-2-s.nawrocki@samsung.com> (raw) -In-Reply-To: <20191016145756.16004-1-s.nawrocki@samsung.com> - -From: Stephen Boyd <sboyd@codeaurora.org> - -On some SoCs the Adaptive Voltage Scaling (AVS) technique is -employed to optimize the operating voltage of a device. At a -given frequency, the hardware monitors dynamic factors and either -makes a suggestion for how much to adjust a voltage for the -current frequency, or it automatically adjusts the voltage -without software intervention. Add an API to the OPP library for -the former case, so that AVS type devices can update the voltages -for an OPP when the hardware determines the voltage should -change. The assumption is that drivers like CPUfreq or devfreq -will register for the OPP notifiers and adjust the voltage -according to suggestions that AVS makes. - -This patch is derived from [1] submitted by Stephen. -[1] https://lore.kernel.org/patchwork/patch/599279/ - -Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> -Signed-off-by: Roger Lu <roger.lu@mediatek.com> -[s.nawrocki@samsung.com: added handling of OPP min/max voltage] -Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> ---- - drivers/opp/core.c | 69 ++++++++++++++++++++++++++++++++++++++++++ - include/linux/pm_opp.h | 13 ++++++++ - 2 files changed, 82 insertions(+) - ---- a/drivers/opp/core.c -+++ b/drivers/opp/core.c -@@ -2102,6 +2102,75 @@ put_table: - } - - /** -+ * dev_pm_opp_adjust_voltage() - helper to change the voltage of an OPP -+ * @dev: device for which we do this operation -+ * @freq: OPP frequency to adjust voltage of -+ * @u_volt: new OPP target voltage -+ * @u_volt_min: new OPP min voltage -+ * @u_volt_max: new OPP max voltage -+ * -+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the -+ * copy operation, returns 0 if no modifcation was done OR modification was -+ * successful. -+ */ -+int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, -+ unsigned long u_volt, unsigned long u_volt_min, -+ unsigned long u_volt_max) -+ -+{ -+ struct opp_table *opp_table; -+ struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); -+ int r = 0; -+ -+ /* Find the opp_table */ -+ opp_table = _find_opp_table(dev); -+ if (IS_ERR(opp_table)) { -+ r = PTR_ERR(opp_table); -+ dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); -+ return r; -+ } -+ -+ mutex_lock(&opp_table->lock); -+ -+ /* Do we have the frequency? */ -+ list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { -+ if (tmp_opp->rate == freq) { -+ opp = tmp_opp; -+ break; -+ } -+ } -+ -+ if (IS_ERR(opp)) { -+ r = PTR_ERR(opp); -+ goto adjust_unlock; -+ } -+ -+ /* Is update really needed? */ -+ if (opp->supplies->u_volt == u_volt) -+ goto adjust_unlock; -+ -+ opp->supplies->u_volt = u_volt; -+ opp->supplies->u_volt_min = u_volt_min; -+ opp->supplies->u_volt_max = u_volt_max; -+ -+ dev_pm_opp_get(opp); -+ mutex_unlock(&opp_table->lock); -+ -+ /* Notify the voltage change of the OPP */ -+ blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADJUST_VOLTAGE, -+ opp); -+ -+ dev_pm_opp_put(opp); -+ goto adjust_put_table; -+ -+adjust_unlock: -+ mutex_unlock(&opp_table->lock); -+adjust_put_table: -+ dev_pm_opp_put_opp_table(opp_table); -+ return r; -+} -+ -+/** - * dev_pm_opp_enable() - Enable a specific OPP - * @dev: device for which we do this operation - * @freq: OPP frequency to enable ---- a/include/linux/pm_opp.h -+++ b/include/linux/pm_opp.h -@@ -22,6 +22,7 @@ struct opp_table; - - enum dev_pm_opp_event { - OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE, -+ OPP_EVENT_ADJUST_VOLTAGE, - }; - - /** -@@ -113,6 +114,10 @@ int dev_pm_opp_add(struct device *dev, u - void dev_pm_opp_remove(struct device *dev, unsigned long freq); - void dev_pm_opp_remove_all_dynamic(struct device *dev); - -+int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, -+ unsigned long u_volt, unsigned long u_volt_min, -+ unsigned long u_volt_max); -+ - int dev_pm_opp_enable(struct device *dev, unsigned long freq); - - int dev_pm_opp_disable(struct device *dev, unsigned long freq); -@@ -242,6 +247,14 @@ static inline void dev_pm_opp_remove_all - { - } - -+static inline int -+dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, -+ unsigned long u_volt, unsigned long u_volt_min, -+ unsigned long u_volt_max) -+{ -+ return 0; -+} -+ - static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq) - { - return 0; |