Esempio n. 1
0
static int gdsc_attach(struct generic_pm_domain *domain, struct device *dev)
{
	int ret, i = 0, j = 0;
	struct gdsc *sc = domain_to_gdsc(domain);
	struct of_phandle_args clkspec;
	struct device_node *np = dev->of_node;

	if (!sc->clock_count)
		return 0;

	ret = pm_clk_create(dev);
	if (ret) {
		dev_dbg(dev, "pm_clk_create failed %d\n", ret);
		return ret;
	}

	sc->clks = devm_kcalloc(dev, sc->clock_count, sizeof(sc->clks),
				       GFP_KERNEL);
	if (!sc->clks)
		return -ENOMEM;

	while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
					   &clkspec)) {
		if (match(clkspec.args[0], sc->clocks, sc->clock_count)) {
			sc->clks[j] = of_clk_get_from_provider(&clkspec);
			pm_clk_add_clk(dev, sc->clks[j]);
			j++;
		} else if (clkspec.args[0] == sc->root_clock)
			sc->root_clk = of_clk_get_from_provider(&clkspec);
		i++;
	}
	return 0;
};
Esempio n. 2
0
static void __init kirkwood_legacy_clk_init(void)
{

	struct device_node *np = of_find_compatible_node(
		NULL, NULL, "marvell,kirkwood-gating-clock");
	struct of_phandle_args clkspec;
	struct clk *clk;

	clkspec.np = np;
	clkspec.args_count = 1;

	clkspec.args[0] = CGC_BIT_PEX0;
	orion_clkdev_add("0", "pcie",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CGC_BIT_PEX1;
	orion_clkdev_add("1", "pcie",
			 of_clk_get_from_provider(&clkspec));

	/*
	 * The ethernet interfaces forget the MAC address assigned by
	 * u-boot if the clocks are turned off. Until proper DT support
	 * is available we always enable them for now.
	 */
	clkspec.args[0] = CGC_BIT_GE0;
	clk = of_clk_get_from_provider(&clkspec);
	clk_prepare_enable(clk);

	clkspec.args[0] = CGC_BIT_GE1;
	clk = of_clk_get_from_provider(&clkspec);
	clk_prepare_enable(clk);
}
Esempio n. 3
0
static struct clk * __init imx_obtain_fixed_clock_from_dt(const char *name)
{
	unsigned int len = 0;
	struct vmm_devtree_phandle_args phandle;
	struct clk *clk = ERR_PTR(-ENODEV);
	char *path;

	len = strlen(name) + strlen("/clocks/") + 1;
	if (NULL == (path = kmalloc(GFP_KERNEL, len)))
	{
		vmm_printf("Failed to allocate fixed clock \"%s\" path "
			   "string\n", name);
		return NULL;
	}

	sprintf(path, "/clocks/%s", name);

	phandle.np = vmm_devtree_getnode(path);
	kfree(path);

	if (phandle.np) {
		clk = of_clk_get_from_provider(&phandle);
		of_node_put(phandle.np);
	}
	return clk;
}
Esempio n. 4
0
static void disable_clock(struct of_phandle_args *clkspec)
{
	struct clk *clk;

	clk = of_clk_get_from_provider(clkspec);
	if (!IS_ERR(clk)) {
		clk_disable_unprepare(clk);
		clk_put(clk);
	}
}
Esempio n. 5
0
/*
 * There are still devices that doesn't even know about DT,
 * get clock gates here and add a clock lookup.
 */
static void __init dove_legacy_clk_init(void)
{
	struct device_node *np = of_find_compatible_node(NULL, NULL,
					 "marvell,dove-gating-clock");
	struct of_phandle_args clkspec;

	clkspec.np = np;
	clkspec.args_count = 1;

	clkspec.args[0] = CLOCK_GATING_BIT_GBE;
	orion_clkdev_add(NULL, "mv643xx_eth_port.0",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CLOCK_GATING_BIT_PCIE0;
	orion_clkdev_add("0", "pcie",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CLOCK_GATING_BIT_PCIE1;
	orion_clkdev_add("1", "pcie",
			 of_clk_get_from_provider(&clkspec));
}
Esempio n. 6
0
int cpg_mssr_attach_dev(struct generic_pm_domain *unused, struct device *dev)
{
    struct cpg_mssr_clk_domain *pd = cpg_mssr_clk_domain;
    struct device_node *np = dev->of_node;
    struct of_phandle_args clkspec;
    struct clk *clk;
    int i = 0;
    int error;

    if (!pd) {
        dev_dbg(dev, "CPG/MSSR clock domain not yet available\n");
        return -EPROBE_DEFER;
    }

    while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
                                       &clkspec)) {
        if (cpg_mssr_is_pm_clk(&clkspec, pd))
            goto found;

        of_node_put(clkspec.np);
        i++;
    }

    return 0;

found:
    clk = of_clk_get_from_provider(&clkspec);
    of_node_put(clkspec.np);

    if (IS_ERR(clk))
        return PTR_ERR(clk);

    error = pm_clk_create(dev);
    if (error) {
        dev_err(dev, "pm_clk_create failed %d\n", error);
        goto fail_put;
    }

    error = pm_clk_add_clk(dev, clk);
    if (error) {
        dev_err(dev, "pm_clk_add_clk %pC failed %d\n", clk, error);
        goto fail_destroy;
    }

    return 0;

fail_destroy:
    pm_clk_destroy(dev);
fail_put:
    clk_put(clk);
    return error;
}
Esempio n. 7
0
int cpg_mstp_attach_dev(struct generic_pm_domain *unused, struct device *dev)
{
	struct device_node *np = dev->of_node;
	struct of_phandle_args clkspec;
	struct clk *clk;
	int i = 0;
	int error;

	while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
					   &clkspec)) {
		if (of_device_is_compatible(clkspec.np,
					    "renesas,cpg-mstp-clocks"))
			goto found;

		/* BSC on r8a73a4/sh73a0 uses zb_clk instead of an mstp clock */
		if (of_node_name_eq(clkspec.np, "zb_clk"))
			goto found;

		of_node_put(clkspec.np);
		i++;
	}

	return 0;

found:
	clk = of_clk_get_from_provider(&clkspec);
	of_node_put(clkspec.np);

	if (IS_ERR(clk))
		return PTR_ERR(clk);

	error = pm_clk_create(dev);
	if (error) {
		dev_err(dev, "pm_clk_create failed %d\n", error);
		goto fail_put;
	}

	error = pm_clk_add_clk(dev, clk);
	if (error) {
		dev_err(dev, "pm_clk_add_clk %pC failed %d\n", clk, error);
		goto fail_destroy;
	}

	return 0;

fail_destroy:
	pm_clk_destroy(dev);
fail_put:
	clk_put(clk);
	return error;
}
Esempio n. 8
0
static void _add_clkdev(struct omap_device *od, const char *clk_alias,
		       const char *clk_name)
{
	struct clk *r;
	int rc;

	if (!clk_alias || !clk_name)
		return;

	dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name);

	r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
	if (!IS_ERR(r)) {
		dev_dbg(&od->pdev->dev,
			 "alias %s already exists\n", clk_alias);
		clk_put(r);
		return;
	}

	r = clk_get_sys(NULL, clk_name);

	if (IS_ERR(r)) {
		struct of_phandle_args clkspec;

		clkspec.np = of_find_node_by_name(NULL, clk_name);

		r = of_clk_get_from_provider(&clkspec);

		rc = clk_register_clkdev(r, clk_alias,
					 dev_name(&od->pdev->dev));
	} else {
		rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev),
				   clk_name, NULL);
	}

	if (rc) {
		if (rc == -ENODEV || rc == -ENOMEM)
			dev_err(&od->pdev->dev,
				"clkdev_alloc for %s failed\n", clk_alias);
		else
			dev_err(&od->pdev->dev,
				"clk_get for %s failed\n", clk_name);
	}
}
Esempio n. 9
0
static struct clk * __init imx_obtain_fixed_clock_from_dt(const char *name)
{
	struct of_phandle_args phandle;
	struct clk *clk = ERR_PTR(-ENODEV);
	char *path;

	path = kasprintf(GFP_KERNEL, "/clocks/%s", name);
	if (!path)
		return ERR_PTR(-ENOMEM);

	phandle.np = of_find_node_by_path(path);
	kfree(path);

	if (phandle.np) {
		clk = of_clk_get_from_provider(&phandle);
		of_node_put(phandle.np);
	}
	return clk;
}
Esempio n. 10
0
/**
 * omap_dt_clocks_register - register DT duplicate clocks during boot
 * @oclks: list of clocks to register
 *
 * Register duplicate or non-standard DT clock entries during boot. By
 * default, DT clocks are found based on their node name. If any
 * additional con-id / dev-id -> clock mapping is required, use this
 * function to list these.
 */
void __init omap_dt_clocks_register(struct omap_dt_clk oclks[])
{
	struct omap_dt_clk *c;
	struct device_node *node;
	struct clk *clk;
	struct of_phandle_args clkspec;

	for (c = oclks; c->node_name != NULL; c++) {
		node = of_find_node_by_name(NULL, c->node_name);
		clkspec.np = node;
		clk = of_clk_get_from_provider(&clkspec);

		if (!IS_ERR(clk)) {
			c->lk.clk = clk;
			clkdev_add(&c->lk);
		} else {
			pr_warn("%s: failed to lookup clock node %s\n",
				__func__, c->node_name);
		}
	}
}
Esempio n. 11
0
static void __init kirkwood_legacy_clk_init(void)
{

	struct device_node *np = of_find_compatible_node(
		NULL, NULL, "marvell,kirkwood-gating-clock");

	struct of_phandle_args clkspec;

	clkspec.np = np;
	clkspec.args_count = 1;

	clkspec.args[0] = CGC_BIT_GE0;
	orion_clkdev_add(NULL, "mv643xx_eth_port.0",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CGC_BIT_PEX0;
	orion_clkdev_add("0", "pcie",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CGC_BIT_USB0;
	orion_clkdev_add(NULL, "orion-ehci.0",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CGC_BIT_PEX1;
	orion_clkdev_add("1", "pcie",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CGC_BIT_GE1;
	orion_clkdev_add(NULL, "mv643xx_eth_port.1",
			 of_clk_get_from_provider(&clkspec));

	clkspec.args[0] = CGC_BIT_SDIO;
	orion_clkdev_add(NULL, "mvsdio",
			 of_clk_get_from_provider(&clkspec));

}
Esempio n. 12
0
static int of_dra7_atl_clk_probe(struct platform_device *pdev)
{
	struct device_node *node = pdev->dev.of_node;
	struct dra7_atl_clock_info *cinfo;
	int i;
	int ret = 0;

	if (!node)
		return -ENODEV;

	cinfo = devm_kzalloc(&pdev->dev, sizeof(*cinfo), GFP_KERNEL);
	if (!cinfo)
		return -ENOMEM;

	cinfo->iobase = of_iomap(node, 0);
	cinfo->dev = &pdev->dev;
	pm_runtime_enable(cinfo->dev);
	pm_runtime_irq_safe(cinfo->dev);

	pm_runtime_get_sync(cinfo->dev);
	atl_write(cinfo, DRA7_ATL_PCLKMUX_REG(0), DRA7_ATL_PCLKMUX);

	for (i = 0; i < DRA7_ATL_INSTANCES; i++) {
		struct device_node *cfg_node;
		char prop[5];
		struct dra7_atl_desc *cdesc;
		struct of_phandle_args clkspec;
		struct clk *clk;
		int rc;

		rc = of_parse_phandle_with_args(node, "ti,provided-clocks",
						NULL, i, &clkspec);

		if (rc) {
			pr_err("%s: failed to lookup atl clock %d\n", __func__,
			       i);
			return -EINVAL;
		}

		clk = of_clk_get_from_provider(&clkspec);

		cdesc = to_atl_desc(__clk_get_hw(clk));
		cdesc->cinfo = cinfo;
		cdesc->id = i;

		/* Get configuration for the ATL instances */
		snprintf(prop, sizeof(prop), "atl%u", i);
		cfg_node = of_find_node_by_name(node, prop);
		if (cfg_node) {
			ret = of_property_read_u32(cfg_node, "bws",
						   &cdesc->bws);
			ret |= of_property_read_u32(cfg_node, "aws",
						    &cdesc->aws);
			if (!ret) {
				cdesc->valid = true;
				atl_write(cinfo, DRA7_ATL_BWSMUX_REG(i),
					  cdesc->bws);
				atl_write(cinfo, DRA7_ATL_AWSMUX_REG(i),
					  cdesc->aws);
			}
		}

		cdesc->probed = true;
		/*
		 * Enable the clock if it has been asked prior to loading the
		 * hw driver
		 */
		if (cdesc->enabled)
			atl_clk_enable(__clk_get_hw(clk));
	}
	pm_runtime_put_sync(cinfo->dev);

	return ret;
}