C++ (Cpp) cpufreq_generic_init Examples

Example #1

File: omap-cpufreq.c Project: 24hours/linux

static int omap_cpu_init(struct cpufreq_policy *policy)
{
	int result;

	policy->clk = clk_get(NULL, "cpufreq_ck");
	if (IS_ERR(policy->clk))
		return PTR_ERR(policy->clk);

	if (!freq_table) {
		result = dev_pm_opp_init_cpufreq_table(mpu_dev, &freq_table);
		if (result) {
			dev_err(mpu_dev,
				"%s: cpu%d: failed creating freq table[%d]\n",
				__func__, policy->cpu, result);
			goto fail;
		}
	}

	atomic_inc_return(&freq_table_users);

	/* FIXME: what's the actual transition time? */
	result = cpufreq_generic_init(policy, freq_table, 300 * 1000);
	if (!result)
		return 0;

	freq_table_free();
fail:
	clk_put(policy->clk);
	return result;
}

Example #2

File: davinci-cpufreq.c Project: 020gzh/linux

static int davinci_cpu_init(struct cpufreq_policy *policy)
{
	int result = 0;
	struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
	struct cpufreq_frequency_table *freq_table = pdata->freq_table;

	if (policy->cpu != 0)
		return -EINVAL;

	/* Finish platform specific initialization */
	if (pdata->init) {
		result = pdata->init();
		if (result)
			return result;
	}

	policy->clk = cpufreq.armclk;

	/*
	 * Time measurement across the target() function yields ~1500-1800us
	 * time taken with no drivers on notification list.
	 * Setting the latency to 2000 us to accommodate addition of drivers
	 * to pre/post change notification list.
	 */
	return cpufreq_generic_init(policy, freq_table, 2000 * 1000);
}

Example #3

File: loongson2_cpufreq.c Project: asmalldev/linux

static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
	struct clk *cpuclk;
	int i;
	unsigned long rate;
	int ret;

	cpuclk = clk_get(NULL, "cpu_clk");
	if (IS_ERR(cpuclk)) {
		pr_err("couldn't get CPU clk\n");
		return PTR_ERR(cpuclk);
	}

	rate = cpu_clock_freq / 1000;
	if (!rate) {
		clk_put(cpuclk);
		return -EINVAL;
	}

	/* clock table init */
	for (i = 2;
	     (loongson2_clockmod_table[i].frequency != CPUFREQ_TABLE_END);
	     i++)
		loongson2_clockmod_table[i].frequency = (rate * i) / 8;

	ret = clk_set_rate(cpuclk, rate * 1000);
	if (ret) {
		clk_put(cpuclk);
		return ret;
	}

	policy->clk = cpuclk;
	return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
}

Example #4

File: loongson1-cpufreq.c Project: 01org/thunderbolt-software-kernel-tree

static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
{
	struct device *cpu_dev = get_cpu_device(policy->cpu);
	struct cpufreq_frequency_table *freq_tbl;
	unsigned int pll_freq, freq;
	int steps, i, ret;

	pll_freq = clk_get_rate(cpufreq->pll_clk) / 1000;

	steps = 1 << DIV_CPU_WIDTH;
	freq_tbl = kcalloc(steps, sizeof(*freq_tbl), GFP_KERNEL);
	if (!freq_tbl)
		return -ENOMEM;

	for (i = 0; i < (steps - 1); i++) {
		freq = pll_freq / (i + 1);
		if ((freq < cpufreq->min_freq) || (freq > cpufreq->max_freq))
			freq_tbl[i].frequency = CPUFREQ_ENTRY_INVALID;
		else
			freq_tbl[i].frequency = freq;
		dev_dbg(cpu_dev,
			"cpufreq table: index %d: frequency %d\n", i,
			freq_tbl[i].frequency);
	}
	freq_tbl[i].frequency = CPUFREQ_TABLE_END;

	policy->clk = cpufreq->clk;
	ret = cpufreq_generic_init(policy, freq_tbl, 0);
	if (ret)
		kfree(freq_tbl);

	return ret;
}

Example #5

File: imx7-cpufreq.c Project: dremaker/imx6ul_linux

static int imx7d_cpufreq_init(struct cpufreq_policy *policy)
{
	int ret;
	policy->clk = arm_clk;
	policy->cur = clk_get_rate(arm_clk) / 1000;

	ret = cpufreq_generic_init(policy, freq_table, transition_latency);
	if (ret) {
		dev_err(cpu_dev, "imx7d cpufreq init failed!\n");
		return ret;
	}

	return 0;
}

Example #6

File: imx6q-cpufreq.c Project: KunYi/linux_imx

static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
{
	int ret;

	policy->clk = arm_clk;
	policy->cur = clk_get_rate(arm_clk) / 1000;

	ret = cpufreq_generic_init(policy, freq_table, transition_latency);
	if (ret) {
		dev_err(cpu_dev, "imx6 cpufreq init failed!\n");
		return ret;
	}
	if (policy->cur > FREQ_396_MHZ)
		request_bus_freq(BUS_FREQ_HIGH);
	return 0;
}

Example #7

File: bcm2835-cpufreq.c Project: HanDH/linux-1

/*
 ==============================================================
  Initialisation function sets up the CPU policy for first use
 ==============================================================
*/
static int bcm2835_cpufreq_driver_init(struct cpufreq_policy *policy)
{
	/* measured value of how long it takes to change frequency */
	const unsigned int transition_latency = 355000; /* ns */

	if (!rpi_firmware_get(NULL)) {
		print_err("Firmware is not available\n");
		return -ENODEV;
	}

	/* now find out what the maximum and minimum frequencies are */
	bcm2835_freq_table[0].frequency = bcm2835_cpufreq_get_clock(RPI_FIRMWARE_GET_MIN_CLOCK_RATE);
	bcm2835_freq_table[1].frequency = bcm2835_cpufreq_get_clock(RPI_FIRMWARE_GET_MAX_CLOCK_RATE);

	print_info("min=%d max=%d\n", bcm2835_freq_table[0].frequency, bcm2835_freq_table[1].frequency);
	return cpufreq_generic_init(policy, bcm2835_freq_table, transition_latency);
}

Example #8

File: tegra-cpufreq.c Project: 7799/linux

static int tegra_cpu_init(struct cpufreq_policy *policy)
{
	int ret;

	if (policy->cpu >= NUM_CPUS)
		return -EINVAL;

	clk_prepare_enable(emc_clk);
	clk_prepare_enable(cpu_clk);

	/* FIXME: what's the actual transition time? */
	ret = cpufreq_generic_init(policy, freq_table, 300 * 1000);
	if (ret) {
		clk_disable_unprepare(cpu_clk);
		clk_disable_unprepare(emc_clk);
		return ret;
	}

	policy->clk = cpu_clk;
	policy->suspend_freq = freq_table[0].frequency;
	return 0;
}

Example #9

File: ls1x-cpufreq.c Project: 020gzh/linux

static int ls1x_cpufreq_init(struct cpufreq_policy *policy)
{
	struct cpufreq_frequency_table *freq_tbl;
	unsigned int pll_freq, freq;
	int steps, i, ret;

	pll_freq = clk_get_rate(ls1x_cpufreq.pll_clk) / 1000;

	steps = 1 << DIV_CPU_WIDTH;
	freq_tbl = kzalloc(sizeof(*freq_tbl) * steps, GFP_KERNEL);
	if (!freq_tbl) {
		dev_err(ls1x_cpufreq.dev,
			"failed to alloc cpufreq_frequency_table\n");
		ret = -ENOMEM;
		goto out;
	}

	for (i = 0; i < (steps - 1); i++) {
		freq = pll_freq / (i + 1);
		if ((freq < ls1x_cpufreq.min_freq) ||
		    (freq > ls1x_cpufreq.max_freq))
			freq_tbl[i].frequency = CPUFREQ_ENTRY_INVALID;
		else
			freq_tbl[i].frequency = freq;
		dev_dbg(ls1x_cpufreq.dev,
			"cpufreq table: index %d: frequency %d\n", i,
			freq_tbl[i].frequency);
	}
	freq_tbl[i].frequency = CPUFREQ_TABLE_END;

	policy->clk = ls1x_cpufreq.clk;
	ret = cpufreq_generic_init(policy, freq_tbl, 0);
	if (ret)
		kfree(freq_tbl);
out:
	return ret;
}

Example #10

File: imx6q-cpufreq.c Project: CaptainThrowback/android_kernel_htc_pme

static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
{
	policy->clk = arm_clk;
	return cpufreq_generic_init(policy, freq_table, transition_latency);
}

Example #11

File: kirkwood-cpufreq.c Project: 020gzh/linux

/* Module init and exit code */
static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
	return cpufreq_generic_init(policy, kirkwood_freq_table, 5000);
}

Example #12

File: exynos-cpufreq.c Project: fxs007/linux

static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
	policy->clk = exynos_info->cpu_clk;
	policy->suspend_freq = locking_frequency;
	return cpufreq_generic_init(policy, exynos_info->freq_table, 100000);
}

Example #13

File: dbx500-cpufreq.c Project: AnadoluPanteri/kernel-plus-harmattan

static int dbx500_cpufreq_init(struct cpufreq_policy *policy)
{
	return cpufreq_generic_init(policy, freq_table, 20 * 1000);
}

Example #14

File: spear-cpufreq.c Project: AnadoluPanteri/kernel-plus-harmattan

static int spear_cpufreq_init(struct cpufreq_policy *policy)
{
	return cpufreq_generic_init(policy, spear_cpufreq.freq_tbl,
			spear_cpufreq.transition_latency);
}