^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // reset-uniphier-glue.c - Glue layer reset driver for UniPhier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) // Copyright 2018 Socionext Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) // Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/reset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/reset/reset-simple.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define MAX_CLKS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define MAX_RSTS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct uniphier_glue_reset_soc_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) int nclks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) const char * const *clock_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int nrsts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) const char * const *reset_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct uniphier_glue_reset_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct clk_bulk_data clk[MAX_CLKS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct reset_control *rst[MAX_RSTS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct reset_simple_data rdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) const struct uniphier_glue_reset_soc_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int uniphier_glue_reset_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct uniphier_glue_reset_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) resource_size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int i, ret, nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) priv->data = of_device_get_match_data(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (WARN_ON(!priv->data || priv->data->nclks > MAX_CLKS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) priv->data->nrsts > MAX_RSTS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) priv->rdata.membase = devm_ioremap_resource(dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (IS_ERR(priv->rdata.membase))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return PTR_ERR(priv->rdata.membase);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) for (i = 0; i < priv->data->nclks; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) priv->clk[i].id = priv->data->clock_names[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ret = devm_clk_bulk_get(dev, priv->data->nclks, priv->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) for (i = 0; i < priv->data->nrsts; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) name = priv->data->reset_names[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) priv->rst[i] = devm_reset_control_get_shared(dev, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (IS_ERR(priv->rst[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return PTR_ERR(priv->rst[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ret = clk_bulk_prepare_enable(priv->data->nclks, priv->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) for (nr = 0; nr < priv->data->nrsts; nr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ret = reset_control_deassert(priv->rst[nr]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) goto out_rst_assert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) spin_lock_init(&priv->rdata.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) priv->rdata.rcdev.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) priv->rdata.rcdev.nr_resets = size * BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) priv->rdata.rcdev.ops = &reset_simple_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) priv->rdata.rcdev.of_node = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) priv->rdata.active_low = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) platform_set_drvdata(pdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ret = devm_reset_controller_register(dev, &priv->rdata.rcdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) goto out_rst_assert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) out_rst_assert:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) while (nr--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) reset_control_assert(priv->rst[nr]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) clk_bulk_disable_unprepare(priv->data->nclks, priv->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int uniphier_glue_reset_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct uniphier_glue_reset_priv *priv = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) for (i = 0; i < priv->data->nrsts; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) reset_control_assert(priv->rst[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) clk_bulk_disable_unprepare(priv->data->nclks, priv->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static const char * const uniphier_pro4_clock_reset_names[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) "gio", "link",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static const struct uniphier_glue_reset_soc_data uniphier_pro4_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .nclks = ARRAY_SIZE(uniphier_pro4_clock_reset_names),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .clock_names = uniphier_pro4_clock_reset_names,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .nrsts = ARRAY_SIZE(uniphier_pro4_clock_reset_names),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .reset_names = uniphier_pro4_clock_reset_names,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static const char * const uniphier_pxs2_clock_reset_names[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) "link",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static const struct uniphier_glue_reset_soc_data uniphier_pxs2_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .nclks = ARRAY_SIZE(uniphier_pxs2_clock_reset_names),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .clock_names = uniphier_pxs2_clock_reset_names,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .nrsts = ARRAY_SIZE(uniphier_pxs2_clock_reset_names),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .reset_names = uniphier_pxs2_clock_reset_names,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static const struct of_device_id uniphier_glue_reset_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .compatible = "socionext,uniphier-pro4-usb3-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .data = &uniphier_pro4_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .compatible = "socionext,uniphier-pro5-usb3-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .data = &uniphier_pro4_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .compatible = "socionext,uniphier-pxs2-usb3-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .data = &uniphier_pxs2_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .compatible = "socionext,uniphier-ld20-usb3-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .data = &uniphier_pxs2_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .compatible = "socionext,uniphier-pxs3-usb3-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .data = &uniphier_pxs2_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .compatible = "socionext,uniphier-pro4-ahci-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .data = &uniphier_pro4_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .compatible = "socionext,uniphier-pxs2-ahci-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .data = &uniphier_pxs2_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .compatible = "socionext,uniphier-pxs3-ahci-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .data = &uniphier_pxs2_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) { /* Sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) MODULE_DEVICE_TABLE(of, uniphier_glue_reset_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static struct platform_driver uniphier_glue_reset_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .probe = uniphier_glue_reset_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .remove = uniphier_glue_reset_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .name = "uniphier-glue-reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .of_match_table = uniphier_glue_reset_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) module_platform_driver(uniphier_glue_reset_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) MODULE_DESCRIPTION("UniPhier Glue layer reset driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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