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Commit 724116ec authored by David Keitel's avatar David Keitel Committed by Rohit Gupta
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PM / devfreq: memlat: add device attribute to show core to device bw map 



This adds the freq_map device attribute to the mem_latency governor in
order to display a given device's core frequency to device bandwidth.
The output should be printed in the formatted in the same way as the
example:

Core freq (MHz) Device BW
            300      1525
            480      3143
            900      4173
           1017      7759
           1296      9887
           1555     11863
           1804     13763

Change-Id: I6bef33a1239329f0687ee3983c2c02d84e984284
Signed-off-by: default avatarDavid Keitel <dkeitel@codeaurora.org>
parent af503815

drivers/devfreq/governor_memlat.c

+24 −0
Original line number Diff line number Diff line
@@ -81,6 +81,29 @@ show_attr(__attr) \ 
store_attr(__attr, min, max)		\

static DEVICE_ATTR(__attr, 0644, show_##__attr, store_##__attr)



static ssize_t show_map(struct device *dev, struct device_attribute *attr,

			char *buf)

{

	struct devfreq *df = to_devfreq(dev);

	struct memlat_node *n = df->data;

	struct core_dev_map *map = n->hw->freq_map;

	unsigned int cnt = 0;



	cnt += snprintf(buf, PAGE_SIZE, "Core freq (MHz)\tDevice BW\n");



	while (map->core_mhz && cnt < PAGE_SIZE) {

		cnt += snprintf(buf + cnt, PAGE_SIZE - cnt, "%15u\t%9u\n",

				map->core_mhz, map->target_freq);

		map++;

	}

	if (cnt < PAGE_SIZE)

		cnt += snprintf(buf + cnt, PAGE_SIZE - cnt, "\n");



	return cnt;

}



static DEVICE_ATTR(freq_map, 0444, show_map, NULL);



static unsigned long core_to_dev_freq(struct memlat_node *node,

		unsigned long coref)

{
@@ -246,6 +269,7 @@ gov_attr(ratio_ceil, 1U, 10000U); 


static struct attribute *dev_attr[] = {

	&dev_attr_ratio_ceil.attr,

	&dev_attr_freq_map.attr,

	NULL,

};