diff options
Diffstat (limited to 'drivers/clk/mvebu/ap806-system-controller.c')
| -rw-r--r-- | drivers/clk/mvebu/ap806-system-controller.c | 107 |
1 files changed, 71 insertions, 36 deletions
diff --git a/drivers/clk/mvebu/ap806-system-controller.c b/drivers/clk/mvebu/ap806-system-controller.c index 8155baccc98e..fa2fbd2cef4a 100644 --- a/drivers/clk/mvebu/ap806-system-controller.c +++ b/drivers/clk/mvebu/ap806-system-controller.c @@ -32,24 +32,38 @@ static struct clk_onecell_data ap806_clk_data = { .clk_num = AP806_CLK_NUM, }; -static int ap806_syscon_clk_probe(struct platform_device *pdev) +static char *ap806_unique_name(struct device *dev, struct device_node *np, + char *name) +{ + const __be32 *reg; + u64 addr; + + reg = of_get_property(np, "reg", NULL); + addr = of_translate_address(np, reg); + return devm_kasprintf(dev, GFP_KERNEL, "%llx-%s", + (unsigned long long)addr, name); +} + +static int ap806_syscon_common_probe(struct platform_device *pdev, + struct device_node *syscon_node) { unsigned int freq_mode, cpuclk_freq; const char *name, *fixedclk_name; - struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; struct regmap *regmap; u32 reg; int ret; - regmap = syscon_node_to_regmap(np); + regmap = syscon_node_to_regmap(syscon_node); if (IS_ERR(regmap)) { - dev_err(&pdev->dev, "cannot get regmap\n"); + dev_err(dev, "cannot get regmap\n"); return PTR_ERR(regmap); } ret = regmap_read(regmap, AP806_SAR_REG, ®); if (ret) { - dev_err(&pdev->dev, "cannot read from regmap\n"); + dev_err(dev, "cannot read from regmap\n"); return ret; } @@ -89,7 +103,7 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev) cpuclk_freq = 600; break; default: - dev_err(&pdev->dev, "invalid SAR value\n"); + dev_err(dev, "invalid SAR value\n"); return -EINVAL; } @@ -97,18 +111,16 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev) cpuclk_freq *= 1000 * 1000; /* CPU clocks depend on the Sample At Reset configuration */ - of_property_read_string_index(np, "clock-output-names", - 0, &name); - ap806_clks[0] = clk_register_fixed_rate(&pdev->dev, name, NULL, + name = ap806_unique_name(dev, syscon_node, "cpu-cluster-0"); + ap806_clks[0] = clk_register_fixed_rate(dev, name, NULL, 0, cpuclk_freq); if (IS_ERR(ap806_clks[0])) { ret = PTR_ERR(ap806_clks[0]); goto fail0; } - of_property_read_string_index(np, "clock-output-names", - 1, &name); - ap806_clks[1] = clk_register_fixed_rate(&pdev->dev, name, NULL, 0, + name = ap806_unique_name(dev, syscon_node, "cpu-cluster-1"); + ap806_clks[1] = clk_register_fixed_rate(dev, name, NULL, 0, cpuclk_freq); if (IS_ERR(ap806_clks[1])) { ret = PTR_ERR(ap806_clks[1]); @@ -116,9 +128,8 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev) } /* Fixed clock is always 1200 Mhz */ - of_property_read_string_index(np, "clock-output-names", - 2, &fixedclk_name); - ap806_clks[2] = clk_register_fixed_rate(&pdev->dev, fixedclk_name, NULL, + fixedclk_name = ap806_unique_name(dev, syscon_node, "fixed"); + ap806_clks[2] = clk_register_fixed_rate(dev, fixedclk_name, NULL, 0, 1200 * 1000 * 1000); if (IS_ERR(ap806_clks[2])) { ret = PTR_ERR(ap806_clks[2]); @@ -126,8 +137,7 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev) } /* MSS Clock is fixed clock divided by 6 */ - of_property_read_string_index(np, "clock-output-names", - 3, &name); + name = ap806_unique_name(dev, syscon_node, "mss"); ap806_clks[3] = clk_register_fixed_factor(NULL, name, fixedclk_name, 0, 1, 6); if (IS_ERR(ap806_clks[3])) { @@ -135,20 +145,14 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev) goto fail3; } - /* eMMC Clock is fixed clock divided by 3 */ - if (of_property_read_string_index(np, "clock-output-names", - 4, &name)) { - ap806_clk_data.clk_num--; - dev_warn(&pdev->dev, - "eMMC clock missing: update the device tree!\n"); - } else { - ap806_clks[4] = clk_register_fixed_factor(NULL, name, - fixedclk_name, - 0, 1, 3); - if (IS_ERR(ap806_clks[4])) { - ret = PTR_ERR(ap806_clks[4]); - goto fail4; - } + /* SDIO(/eMMC) Clock is fixed clock divided by 3 */ + name = ap806_unique_name(dev, syscon_node, "sdio"); + ap806_clks[4] = clk_register_fixed_factor(NULL, name, + fixedclk_name, + 0, 1, 3); + if (IS_ERR(ap806_clks[4])) { + ret = PTR_ERR(ap806_clks[4]); + goto fail4; } of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data); @@ -172,17 +176,48 @@ fail0: return ret; } -static const struct of_device_id ap806_syscon_of_match[] = { +static int ap806_syscon_legacy_probe(struct platform_device *pdev) +{ + dev_warn(&pdev->dev, FW_WARN "Using legacy device tree binding\n"); + dev_warn(&pdev->dev, FW_WARN "Update your device tree:\n"); + dev_warn(&pdev->dev, FW_WARN + "This binding won't be supported in future kernel\n"); + + return ap806_syscon_common_probe(pdev, pdev->dev.of_node); + +} + +static int ap806_clock_probe(struct platform_device *pdev) +{ + return ap806_syscon_common_probe(pdev, pdev->dev.of_node->parent); +} + +static const struct of_device_id ap806_syscon_legacy_of_match[] = { { .compatible = "marvell,ap806-system-controller", }, { } }; -static struct platform_driver ap806_syscon_driver = { - .probe = ap806_syscon_clk_probe, +static struct platform_driver ap806_syscon_legacy_driver = { + .probe = ap806_syscon_legacy_probe, .driver = { .name = "marvell-ap806-system-controller", - .of_match_table = ap806_syscon_of_match, + .of_match_table = ap806_syscon_legacy_of_match, + .suppress_bind_attrs = true, + }, +}; +builtin_platform_driver(ap806_syscon_legacy_driver); + +static const struct of_device_id ap806_clock_of_match[] = { + { .compatible = "marvell,ap806-clock", }, + { } +}; + +static struct platform_driver ap806_clock_driver = { + .probe = ap806_clock_probe, + .driver = { + .name = "marvell-ap806-clock", + .of_match_table = ap806_clock_of_match, .suppress_bind_attrs = true, }, }; -builtin_platform_driver(ap806_syscon_driver); +builtin_platform_driver(ap806_clock_driver); |