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Date: Fri, 24 Jan 2020 15:14:48 +0100 From: Kamil Konieczny <k.konieczny@...sung.com> To: k.konieczny@...sung.com Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>, Chanwoo Choi <cw00.choi@...sung.com>, Krzysztof Kozlowski <krzk@...nel.org>, Kukjin Kim <kgene@...nel.org>, Kyungmin Park <kyungmin.park@...sung.com>, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Marek Szyprowski <m.szyprowski@...sung.com>, MyungJoo Ham <myungjoo.ham@...sung.com> Subject: [PATCH RESEND 2/3] PM / devfreq: exynos-bus: prepare for change in load calc in exynos-nocp Add time to struct exynos_bus and time and current frequency to struct devfreq_event_data. This will allow to calculate load and max bandwidth in exynos-nocp driver. Signed-off-by: Kamil Konieczny <k.konieczny@...sung.com> --- drivers/devfreq/exynos-bus.c | 21 ++++++++++++++++++++- include/linux/devfreq-event.h | 4 ++++ 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 8fa8eb541373..f04ce5b84e75 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -14,6 +14,7 @@ #include <linux/devfreq-event.h> #include <linux/device.h> #include <linux/export.h> +#include <linux/jiffies.h> #include <linux/module.h> #include <linux/of.h> #include <linux/pm_opp.h> @@ -31,6 +32,7 @@ struct exynos_bus { struct mutex lock; unsigned long curr_freq; + unsigned long prev_time; struct opp_table *opp_table; struct clk *clk; @@ -57,7 +59,22 @@ static int exynos_bus_##ops(struct exynos_bus *bus) \ } exynos_bus_ops_edev(enable_edev); exynos_bus_ops_edev(disable_edev); -exynos_bus_ops_edev(set_event); + +static int exynos_bus_set_event(struct exynos_bus *bus) +{ + int i, ret; + + bus->prev_time = jiffies; + for (i = 0; i < bus->edev_count; i++) { + if (!bus->edev[i]) + continue; + ret = devfreq_event_set_event(bus->edev[i]); + if (ret < 0) + return ret; + } + + return 0; +} static int exynos_bus_get_event(struct exynos_bus *bus, struct devfreq_event_data *edata) @@ -66,6 +83,8 @@ static int exynos_bus_get_event(struct exynos_bus *bus, unsigned long load_count = 0, total_count = 0; int i, ret = 0; + event_data.curr_freq = bus->curr_freq; + event_data.prev_time = bus->prev_time; for (i = 0; i < bus->edev_count; i++) { if (!bus->edev[i]) continue; diff --git a/include/linux/devfreq-event.h b/include/linux/devfreq-event.h index f14f17f8cb7f..b57ccfcb775b 100644 --- a/include/linux/devfreq-event.h +++ b/include/linux/devfreq-event.h @@ -41,12 +41,16 @@ struct devfreq_event_dev { * each count may represent a clock cycle, a time unit * (ns/us/...), or anything the device driver wants. * Generally, utilization is load_count / total_count. + * @prev_time : jiffies for interval calculations with polling. + * @curr_freq : current frequency for calculating max bandwidth. * * This structure contains the data of devfreq-event device for polling period. */ struct devfreq_event_data { unsigned long load_count; unsigned long total_count; + unsigned long prev_time; + unsigned long curr_freq; }; /** -- 2.25.0
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