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Diffstat (limited to 'drivers/mfd/sun6i-prcm.c')
-rw-r--r--drivers/mfd/sun6i-prcm.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/mfd/sun6i-prcm.c b/drivers/mfd/sun6i-prcm.c
new file mode 100644
index 0000000000..ee03db0b84
--- /dev/null
+++ b/drivers/mfd/sun6i-prcm.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2014 Free Electrons
+ *
+ * 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[] = {
+ DEFINE_RES_MEM(0x0, 4)
+};
+
+static const struct resource sun6i_a31_apb0_clk_res[] = {
+ DEFINE_RES_MEM(0xc, 4)
+};
+
+static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
+ DEFINE_RES_MEM(0x28, 4)
+};
+
+static const struct resource sun6i_a31_ir_clk_res[] = {
+ DEFINE_RES_MEM(0x54, 4)
+};
+
+static const struct resource sun6i_a31_apb0_rstc_res[] = {
+ DEFINE_RES_MEM(0xb0, 4)
+};
+
+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)
+{
+ const struct of_device_id *match;
+ const struct prcm_data *data;
+ struct resource *res;
+ int ret;
+
+ match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
+ 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);