PM / devfreq: exynos5: introduce struct busfreq_ppmu_data
This is a preparation for making more PPMU code common for EXYNOS devfreq drivers. There should be no functional changes caused by this patch. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
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@ -46,11 +46,16 @@ enum exynos_ppmu_list {
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PPMU_END,
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};
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struct busfreq_ppmu_data {
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struct exynos_ppmu *ppmu;
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int ppmu_end;
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};
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struct busfreq_data_int {
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struct device *dev;
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struct devfreq *devfreq;
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struct regulator *vdd_int;
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struct exynos_ppmu ppmu[PPMU_END];
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struct busfreq_ppmu_data ppmu_data;
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unsigned long curr_freq;
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bool disabled;
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@ -75,47 +80,47 @@ static struct int_bus_opp_table exynos5_int_opp_table[] = {
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{0, 0, 0},
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};
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static void busfreq_mon_reset(struct busfreq_data_int *data)
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static void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data)
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{
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unsigned int i;
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for (i = PPMU_RIGHT; i < PPMU_END; i++) {
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void __iomem *ppmu_base = data->ppmu[i].hw_base;
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for (i = 0; i < ppmu_data->ppmu_end; i++) {
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void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
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/* Reset the performance and cycle counters */
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exynos_ppmu_reset(ppmu_base);
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/* Setup count registers to monitor read/write transactions */
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data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT;
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ppmu_data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT;
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exynos_ppmu_setevent(ppmu_base, PPMU_PMNCNT3,
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data->ppmu[i].event[PPMU_PMNCNT3]);
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ppmu_data->ppmu[i].event[PPMU_PMNCNT3]);
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exynos_ppmu_start(ppmu_base);
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}
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}
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static void exynos5_read_ppmu(struct busfreq_data_int *data)
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static void exynos5_read_ppmu(struct busfreq_ppmu_data *ppmu_data)
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{
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int i, j;
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for (i = PPMU_RIGHT; i < PPMU_END; i++) {
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void __iomem *ppmu_base = data->ppmu[i].hw_base;
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for (i = 0; i < ppmu_data->ppmu_end; i++) {
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void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
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exynos_ppmu_stop(ppmu_base);
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/* Update local data from PPMU */
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data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT);
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ppmu_data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT);
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for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
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if (data->ppmu[i].event[j] == 0)
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data->ppmu[i].count[j] = 0;
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if (ppmu_data->ppmu[i].event[j] == 0)
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ppmu_data->ppmu[i].count[j] = 0;
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else
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data->ppmu[i].count[j] =
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ppmu_data->ppmu[i].count[j] =
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exynos_ppmu_read(ppmu_base, j);
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}
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}
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busfreq_mon_reset(data);
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busfreq_mon_reset(ppmu_data);
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}
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static int exynos5_int_setvolt(struct busfreq_data_int *data,
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@ -185,16 +190,16 @@ out:
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return err;
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}
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static int exynos5_get_busier_dmc(struct busfreq_data_int *data)
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static int exynos5_get_busier_dmc(struct busfreq_ppmu_data *ppmu_data)
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{
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int i, j;
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int busy = 0;
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unsigned int temp = 0;
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for (i = PPMU_RIGHT; i < PPMU_END; i++) {
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for (i = 0; i < ppmu_data->ppmu_end; i++) {
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for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
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if (data->ppmu[i].count[j] > temp) {
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temp = data->ppmu[i].count[j];
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if (ppmu_data->ppmu[i].count[j] > temp) {
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temp = ppmu_data->ppmu[i].count[j];
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busy = i;
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}
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}
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@ -209,17 +214,18 @@ static int exynos5_int_get_dev_status(struct device *dev,
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struct platform_device *pdev = container_of(dev, struct platform_device,
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dev);
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struct busfreq_data_int *data = platform_get_drvdata(pdev);
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struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
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int busier_dmc;
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exynos5_read_ppmu(data);
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busier_dmc = exynos5_get_busier_dmc(data);
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exynos5_read_ppmu(ppmu_data);
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busier_dmc = exynos5_get_busier_dmc(ppmu_data);
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stat->current_frequency = data->curr_freq;
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/* Number of cycles spent on memory access */
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stat->busy_time = data->ppmu[busier_dmc].count[PPMU_PMNCNT3];
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stat->busy_time = ppmu_data->ppmu[busier_dmc].count[PPMU_PMNCNT3];
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stat->busy_time *= 100 / INT_BUS_SATURATION_RATIO;
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stat->total_time = data->ppmu[busier_dmc].ccnt;
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stat->total_time = ppmu_data->ppmu[busier_dmc].ccnt;
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return 0;
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}
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@ -315,6 +321,7 @@ unlock:
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static int exynos5_busfreq_int_probe(struct platform_device *pdev)
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{
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struct busfreq_data_int *data;
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struct busfreq_ppmu_data *ppmu_data;
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struct dev_pm_opp *opp;
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struct device *dev = &pdev->dev;
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struct device_node *np;
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@ -330,16 +337,26 @@ static int exynos5_busfreq_int_probe(struct platform_device *pdev)
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return -ENOMEM;
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}
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ppmu_data = &data->ppmu_data;
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ppmu_data->ppmu_end = PPMU_END;
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ppmu_data->ppmu = devm_kzalloc(dev,
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sizeof(struct exynos_ppmu) * PPMU_END,
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GFP_KERNEL);
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if (!ppmu_data->ppmu) {
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dev_err(dev, "Failed to allocate memory for exynos_ppmu\n");
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return -ENOMEM;
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}
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np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-ppmu");
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if (np == NULL) {
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pr_err("Unable to find PPMU node\n");
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return -ENOENT;
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}
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for (i = PPMU_RIGHT; i < PPMU_END; i++) {
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for (i = 0; i < ppmu_data->ppmu_end; i++) {
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/* map PPMU memory region */
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data->ppmu[i].hw_base = of_iomap(np, i);
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if (data->ppmu[i].hw_base == NULL) {
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ppmu_data->ppmu[i].hw_base = of_iomap(np, i);
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if (ppmu_data->ppmu[i].hw_base == NULL) {
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dev_err(&pdev->dev, "failed to map memory region\n");
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return -ENOMEM;
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}
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@ -390,7 +407,7 @@ static int exynos5_busfreq_int_probe(struct platform_device *pdev)
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platform_set_drvdata(pdev, data);
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busfreq_mon_reset(data);
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busfreq_mon_reset(ppmu_data);
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data->devfreq = devfreq_add_device(dev, &exynos5_devfreq_int_profile,
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"simple_ondemand", NULL);
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@ -435,8 +452,9 @@ static int exynos5_busfreq_int_resume(struct device *dev)
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struct platform_device *pdev = container_of(dev, struct platform_device,
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dev);
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struct busfreq_data_int *data = platform_get_drvdata(pdev);
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struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
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busfreq_mon_reset(data);
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busfreq_mon_reset(ppmu_data);
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return 0;
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}
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static const struct dev_pm_ops exynos5_busfreq_int_pm = {
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