/* * Copyright (C) 2014 Free Electrons * * License Terms: GNU General Public License v2 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> * * Allwinner PRCM (Power/Reset/Clock Management) driver * */ #include <linux/mfd/core.h> #include <linux/init.h> #include <linux/of.h> #define SUN8I_CODEC_ANALOG_BASE 0x1c0 #define SUN8I_CODEC_ANALOG_SIZE 0x4 struct prcm_data { int nsubdevs; const struct mfd_cell *subdevs; }; static const struct resource sun6i_a31_ar100_clk_res[] = { { .start = 0x0, .end = 0x3, .flags = IORESOURCE_MEM, }, }; static const struct resource sun6i_a31_apb0_clk_res[] = { { .start = 0xc, .end = 0xf, .flags = IORESOURCE_MEM, }, }; static const struct resource sun6i_a31_apb0_gates_clk_res[] = { { .start = 0x28, .end = 0x2b, .flags = IORESOURCE_MEM, }, }; static const struct resource sun6i_a31_ir_clk_res[] = { { .start = 0x54, .end = 0x57, .flags = IORESOURCE_MEM, }, }; static const struct resource sun6i_a31_apb0_rstc_res[] = { { .start = 0xb0, .end = 0xb3, .flags = IORESOURCE_MEM, }, }; static const struct resource sun8i_codec_analog_res[] = { DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE), }; static const struct mfd_cell sun6i_a31_prcm_subdevs[] = { { .name = "sun6i-a31-ar100-clk", .of_compatible = "allwinner,sun6i-a31-ar100-clk", .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res), .resources = sun6i_a31_ar100_clk_res, }, { .name = "sun6i-a31-apb0-clk", .of_compatible = "allwinner,sun6i-a31-apb0-clk", .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res), .resources = sun6i_a31_apb0_clk_res, }, { .name = "sun6i-a31-apb0-gates-clk", .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk", .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res), .resources = sun6i_a31_apb0_gates_clk_res, }, { .name = "sun6i-a31-ir-clk", .of_compatible = "allwinner,sun4i-a10-mod0-clk", .num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res), .resources = sun6i_a31_ir_clk_res, }, { .name = "sun6i-a31-apb0-clock-reset", .of_compatible = "allwinner,sun6i-a31-clock-reset", .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res), .resources = sun6i_a31_apb0_rstc_res, }, }; static const struct mfd_cell sun8i_a23_prcm_subdevs[] = { { .name = "sun8i-a23-apb0-clk", .of_compatible = "allwinner,sun8i-a23-apb0-clk", .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res), .resources = sun6i_a31_apb0_clk_res, }, { .name = "sun6i-a31-apb0-gates-clk", .of_compatible = "allwinner,sun8i-a23-apb0-gates-clk", .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res), .resources = sun6i_a31_apb0_gates_clk_res, }, { .name = "sun6i-a31-apb0-clock-reset", .of_compatible = "allwinner,sun6i-a31-clock-reset", .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res), .resources = sun6i_a31_apb0_rstc_res, }, { .name = "sun8i-codec-analog", .of_compatible = "allwinner,sun8i-a23-codec-analog", .num_resources = ARRAY_SIZE(sun8i_codec_analog_res), .resources = sun8i_codec_analog_res, }, }; static const struct prcm_data sun6i_a31_prcm_data = { .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs), .subdevs = sun6i_a31_prcm_subdevs, }; static const struct prcm_data sun8i_a23_prcm_data = { .nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs), .subdevs = sun8i_a23_prcm_subdevs, }; static const struct of_device_id sun6i_prcm_dt_ids[] = { { .compatible = "allwinner,sun6i-a31-prcm", .data = &sun6i_a31_prcm_data, }, { .compatible = "allwinner,sun8i-a23-prcm", .data = &sun8i_a23_prcm_data, }, { /* sentinel */ }, }; static int sun6i_prcm_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; const struct of_device_id *match; const struct prcm_data *data; struct resource *res; int ret; match = of_match_node(sun6i_prcm_dt_ids, np); if (!match) return -EINVAL; data = match->data; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "no prcm memory region provided\n"); return -ENOENT; } ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs, res, -1, NULL); if (ret) { dev_err(&pdev->dev, "failed to add subdevices\n"); return ret; } return 0; } static struct platform_driver sun6i_prcm_driver = { .driver = { .name = "sun6i-prcm", .of_match_table = sun6i_prcm_dt_ids, }, .probe = sun6i_prcm_probe, }; builtin_platform_driver(sun6i_prcm_driver);