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- #define pr_fmt(fmt) "ap806-system-controller: " fmt
- #include "armada_ap_cp_helper.h"
- #include <linux/clk-provider.h>
- #include <linux/mfd/syscon.h>
- #include <linux/init.h>
- #include <linux/of.h>
- #include <linux/platform_device.h>
- #include <linux/regmap.h>
- #define AP806_SAR_REG 0x400
- #define AP806_SAR_CLKFREQ_MODE_MASK 0x1f
- #define AP806_CLK_NUM 6
- static struct clk *ap806_clks[AP806_CLK_NUM];
- static struct clk_onecell_data ap806_clk_data = {
- .clks = ap806_clks,
- .clk_num = AP806_CLK_NUM,
- };
- static int ap806_get_sar_clocks(unsigned int freq_mode,
- unsigned int *cpuclk_freq,
- unsigned int *dclk_freq)
- {
- switch (freq_mode) {
- case 0x0:
- *cpuclk_freq = 2000;
- *dclk_freq = 600;
- break;
- case 0x1:
- *cpuclk_freq = 2000;
- *dclk_freq = 525;
- break;
- case 0x6:
- *cpuclk_freq = 1800;
- *dclk_freq = 600;
- break;
- case 0x7:
- *cpuclk_freq = 1800;
- *dclk_freq = 525;
- break;
- case 0x4:
- *cpuclk_freq = 1600;
- *dclk_freq = 400;
- break;
- case 0xB:
- *cpuclk_freq = 1600;
- *dclk_freq = 450;
- break;
- case 0xD:
- *cpuclk_freq = 1600;
- *dclk_freq = 525;
- break;
- case 0x1a:
- *cpuclk_freq = 1400;
- *dclk_freq = 400;
- break;
- case 0x14:
- *cpuclk_freq = 1300;
- *dclk_freq = 400;
- break;
- case 0x17:
- *cpuclk_freq = 1300;
- *dclk_freq = 325;
- break;
- case 0x19:
- *cpuclk_freq = 1200;
- *dclk_freq = 400;
- break;
- case 0x13:
- *cpuclk_freq = 1000;
- *dclk_freq = 325;
- break;
- case 0x1d:
- *cpuclk_freq = 1000;
- *dclk_freq = 400;
- break;
- case 0x1c:
- *cpuclk_freq = 800;
- *dclk_freq = 400;
- break;
- case 0x1b:
- *cpuclk_freq = 600;
- *dclk_freq = 400;
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static int ap807_get_sar_clocks(unsigned int freq_mode,
- unsigned int *cpuclk_freq,
- unsigned int *dclk_freq)
- {
- switch (freq_mode) {
- case 0x0:
- *cpuclk_freq = 2000;
- *dclk_freq = 1200;
- break;
- case 0x6:
- *cpuclk_freq = 2200;
- *dclk_freq = 1200;
- break;
- case 0xD:
- *cpuclk_freq = 1600;
- *dclk_freq = 1200;
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static int ap806_syscon_common_probe(struct platform_device *pdev,
- struct device_node *syscon_node)
- {
- unsigned int freq_mode, cpuclk_freq, dclk_freq;
- const char *name, *fixedclk_name;
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct regmap *regmap;
- u32 reg;
- int ret;
- regmap = syscon_node_to_regmap(syscon_node);
- if (IS_ERR(regmap)) {
- dev_err(dev, "cannot get regmap\n");
- return PTR_ERR(regmap);
- }
- ret = regmap_read(regmap, AP806_SAR_REG, ®);
- if (ret) {
- dev_err(dev, "cannot read from regmap\n");
- return ret;
- }
- freq_mode = reg & AP806_SAR_CLKFREQ_MODE_MASK;
- if (of_device_is_compatible(pdev->dev.of_node,
- "marvell,ap806-clock")) {
- ret = ap806_get_sar_clocks(freq_mode, &cpuclk_freq, &dclk_freq);
- } else if (of_device_is_compatible(pdev->dev.of_node,
- "marvell,ap807-clock")) {
- ret = ap807_get_sar_clocks(freq_mode, &cpuclk_freq, &dclk_freq);
- } else {
- dev_err(dev, "compatible not supported\n");
- return -EINVAL;
- }
- if (ret) {
- dev_err(dev, "invalid Sample at Reset value\n");
- return ret;
- }
-
- cpuclk_freq *= 1000 * 1000;
- dclk_freq *= 1000 * 1000;
-
- name = ap_cp_unique_name(dev, syscon_node, "pll-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;
- }
- name = ap_cp_unique_name(dev, syscon_node, "pll-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]);
- goto fail1;
- }
-
- fixedclk_name = ap_cp_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]);
- goto fail2;
- }
-
- name = ap_cp_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])) {
- ret = PTR_ERR(ap806_clks[3]);
- goto fail3;
- }
-
- name = ap_cp_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;
- }
-
- name = ap_cp_unique_name(dev, syscon_node, "ap-dclk");
- ap806_clks[5] = clk_register_fixed_rate(dev, name, NULL, 0, dclk_freq);
- if (IS_ERR(ap806_clks[5])) {
- ret = PTR_ERR(ap806_clks[5]);
- goto fail5;
- }
- ret = of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
- if (ret)
- goto fail_clk_add;
- return 0;
- fail_clk_add:
- clk_unregister_fixed_factor(ap806_clks[5]);
- fail5:
- clk_unregister_fixed_factor(ap806_clks[4]);
- fail4:
- clk_unregister_fixed_factor(ap806_clks[3]);
- fail3:
- clk_unregister_fixed_rate(ap806_clks[2]);
- fail2:
- clk_unregister_fixed_rate(ap806_clks[1]);
- fail1:
- clk_unregister_fixed_rate(ap806_clks[0]);
- fail0:
- return ret;
- }
- 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_legacy_driver = {
- .probe = ap806_syscon_legacy_probe,
- .driver = {
- .name = "marvell-ap806-system-controller",
- .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", },
- { .compatible = "marvell,ap807-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_clock_driver);
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