Merge branch 'clk-ap806' into clk-next
This commit is contained in:
Michael Turquette
Коммит
fca63efe6e
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@ -7,6 +7,14 @@ registers giving access to numerous features: clocks, pin-muxing and
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many other SoC configuration items. This DT binding allows to describe
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this system controller.
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For the top level node:
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- compatible: must be: "syscon", "simple-mfd";
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- reg: register area of the AP806 system controller
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Clocks:
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-------
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The Device Tree node representing the AP806 system controller provides
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a number of clocks:
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@ -17,19 +25,17 @@ a number of clocks:
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Required properties:
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- compatible: must be:
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"marvell,ap806-system-controller", "syscon"
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- reg: register area of the AP806 system controller
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- compatible: must be: "marvell,ap806-clock"
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- #clock-cells: must be set to 1
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- clock-output-names: must be defined to:
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"ap-cpu-cluster-0", "ap-cpu-cluster-1", "ap-fixed", "ap-mss"
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Example:
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syscon: system-controller@6f4000 {
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compatible = "marvell,ap806-system-controller", "syscon";
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#clock-cells = <1>;
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clock-output-names = "ap-cpu-cluster-0", "ap-cpu-cluster-1",
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"ap-fixed", "ap-mss";
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compatible = "syscon", "simple-mfd";
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reg = <0x6f4000 0x1000>;
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ap_clk: clock {
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compatible = "marvell,ap806-clock";
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#clock-cells = <1>;
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};
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};
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@ -32,24 +32,38 @@ static struct clk_onecell_data ap806_clk_data = {
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.clk_num = AP806_CLK_NUM,
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};
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static int ap806_syscon_clk_probe(struct platform_device *pdev)
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static char *ap806_unique_name(struct device *dev, struct device_node *np,
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char *name)
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{
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const __be32 *reg;
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u64 addr;
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reg = of_get_property(np, "reg", NULL);
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addr = of_translate_address(np, reg);
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return devm_kasprintf(dev, GFP_KERNEL, "%llx-%s",
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(unsigned long long)addr, name);
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}
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static int ap806_syscon_common_probe(struct platform_device *pdev,
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struct device_node *syscon_node)
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{
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unsigned int freq_mode, cpuclk_freq;
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const char *name, *fixedclk_name;
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struct device_node *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct regmap *regmap;
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u32 reg;
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int ret;
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regmap = syscon_node_to_regmap(np);
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regmap = syscon_node_to_regmap(syscon_node);
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if (IS_ERR(regmap)) {
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dev_err(&pdev->dev, "cannot get regmap\n");
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dev_err(dev, "cannot get regmap\n");
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return PTR_ERR(regmap);
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}
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ret = regmap_read(regmap, AP806_SAR_REG, ®);
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if (ret) {
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dev_err(&pdev->dev, "cannot read from regmap\n");
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dev_err(dev, "cannot read from regmap\n");
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return ret;
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}
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@ -89,7 +103,7 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
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cpuclk_freq = 600;
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break;
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default:
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dev_err(&pdev->dev, "invalid SAR value\n");
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dev_err(dev, "invalid SAR value\n");
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return -EINVAL;
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}
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@ -97,18 +111,16 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
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cpuclk_freq *= 1000 * 1000;
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/* CPU clocks depend on the Sample At Reset configuration */
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of_property_read_string_index(np, "clock-output-names",
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0, &name);
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ap806_clks[0] = clk_register_fixed_rate(&pdev->dev, name, NULL,
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name = ap806_unique_name(dev, syscon_node, "cpu-cluster-0");
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ap806_clks[0] = clk_register_fixed_rate(dev, name, NULL,
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0, cpuclk_freq);
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if (IS_ERR(ap806_clks[0])) {
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ret = PTR_ERR(ap806_clks[0]);
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goto fail0;
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}
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of_property_read_string_index(np, "clock-output-names",
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1, &name);
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ap806_clks[1] = clk_register_fixed_rate(&pdev->dev, name, NULL, 0,
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name = ap806_unique_name(dev, syscon_node, "cpu-cluster-1");
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ap806_clks[1] = clk_register_fixed_rate(dev, name, NULL, 0,
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cpuclk_freq);
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if (IS_ERR(ap806_clks[1])) {
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ret = PTR_ERR(ap806_clks[1]);
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@ -116,9 +128,8 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
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}
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/* Fixed clock is always 1200 Mhz */
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of_property_read_string_index(np, "clock-output-names",
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2, &fixedclk_name);
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ap806_clks[2] = clk_register_fixed_rate(&pdev->dev, fixedclk_name, NULL,
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fixedclk_name = ap806_unique_name(dev, syscon_node, "fixed");
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ap806_clks[2] = clk_register_fixed_rate(dev, fixedclk_name, NULL,
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0, 1200 * 1000 * 1000);
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if (IS_ERR(ap806_clks[2])) {
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ret = PTR_ERR(ap806_clks[2]);
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@ -126,8 +137,7 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
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}
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/* MSS Clock is fixed clock divided by 6 */
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of_property_read_string_index(np, "clock-output-names",
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3, &name);
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name = ap806_unique_name(dev, syscon_node, "mss");
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ap806_clks[3] = clk_register_fixed_factor(NULL, name, fixedclk_name,
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0, 1, 6);
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if (IS_ERR(ap806_clks[3])) {
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@ -135,20 +145,14 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
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goto fail3;
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}
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/* eMMC Clock is fixed clock divided by 3 */
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if (of_property_read_string_index(np, "clock-output-names",
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4, &name)) {
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ap806_clk_data.clk_num--;
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dev_warn(&pdev->dev,
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"eMMC clock missing: update the device tree!\n");
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} else {
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ap806_clks[4] = clk_register_fixed_factor(NULL, name,
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fixedclk_name,
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0, 1, 3);
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if (IS_ERR(ap806_clks[4])) {
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ret = PTR_ERR(ap806_clks[4]);
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goto fail4;
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}
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/* SDIO(/eMMC) Clock is fixed clock divided by 3 */
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name = ap806_unique_name(dev, syscon_node, "sdio");
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ap806_clks[4] = clk_register_fixed_factor(NULL, name,
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fixedclk_name,
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0, 1, 3);
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if (IS_ERR(ap806_clks[4])) {
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ret = PTR_ERR(ap806_clks[4]);
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goto fail4;
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}
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of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
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@ -172,17 +176,48 @@ fail0:
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return ret;
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}
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static const struct of_device_id ap806_syscon_of_match[] = {
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static int ap806_syscon_legacy_probe(struct platform_device *pdev)
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{
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dev_warn(&pdev->dev, FW_WARN "Using legacy device tree binding\n");
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dev_warn(&pdev->dev, FW_WARN "Update your device tree:\n");
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dev_warn(&pdev->dev, FW_WARN
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"This binding won't be supported in future kernel\n");
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return ap806_syscon_common_probe(pdev, pdev->dev.of_node);
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}
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static int ap806_clock_probe(struct platform_device *pdev)
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{
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return ap806_syscon_common_probe(pdev, pdev->dev.of_node->parent);
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}
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static const struct of_device_id ap806_syscon_legacy_of_match[] = {
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{ .compatible = "marvell,ap806-system-controller", },
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{ }
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};
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static struct platform_driver ap806_syscon_driver = {
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.probe = ap806_syscon_clk_probe,
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static struct platform_driver ap806_syscon_legacy_driver = {
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.probe = ap806_syscon_legacy_probe,
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.driver = {
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.name = "marvell-ap806-system-controller",
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.of_match_table = ap806_syscon_of_match,
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.of_match_table = ap806_syscon_legacy_of_match,
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.suppress_bind_attrs = true,
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},
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};
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builtin_platform_driver(ap806_syscon_driver);
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builtin_platform_driver(ap806_syscon_legacy_driver);
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static const struct of_device_id ap806_clock_of_match[] = {
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{ .compatible = "marvell,ap806-clock", },
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{ }
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};
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static struct platform_driver ap806_clock_driver = {
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.probe = ap806_clock_probe,
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.driver = {
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.name = "marvell-ap806-clock",
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.of_match_table = ap806_clock_of_match,
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.suppress_bind_attrs = true,
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},
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};
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builtin_platform_driver(ap806_clock_driver);
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