1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
  4 */
  5
  6#include <linux/kernel.h>
  7#include <linux/err.h>
  8#include <linux/platform_device.h>
  9#include <linux/clk-provider.h>
 10#include <linux/regmap.h>
 11#include <linux/module.h>
 12
 13#include <dt-bindings/clock/qcom,apss-ipq.h>
 14
 15#include "common.h"
 16#include "clk-regmap.h"
 17#include "clk-branch.h"
 18#include "clk-alpha-pll.h"
 19#include "clk-regmap-mux.h"
 20
 21enum {
 22	P_XO,
 23	P_APSS_PLL_EARLY,
 24};
 25
 26static const struct clk_parent_data parents_apcs_alias0_clk_src[] = {
 27	{ .fw_name = "xo" },
 28	{ .fw_name = "pll" },
 29};
 30
 31static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
 32	{ P_XO, 0 },
 33	{ P_APSS_PLL_EARLY, 5 },
 34};
 35
 36static struct clk_regmap_mux apcs_alias0_clk_src = {
 37	.reg = 0x0050,
 38	.width = 3,
 39	.shift = 7,
 40	.parent_map = parents_apcs_alias0_clk_src_map,
 41	.clkr.hw.init = &(struct clk_init_data){
 42		.name = "apcs_alias0_clk_src",
 43		.parent_data = parents_apcs_alias0_clk_src,
 44		.num_parents = 2,
 45		.ops = &clk_regmap_mux_closest_ops,
 46		.flags = CLK_SET_RATE_PARENT,
 47	},
 48};
 49
 50static struct clk_branch apcs_alias0_core_clk = {
 51	.halt_reg = 0x0058,
 52	.clkr = {
 53		.enable_reg = 0x0058,
 54		.enable_mask = BIT(0),
 55		.hw.init = &(struct clk_init_data){
 56			.name = "apcs_alias0_core_clk",
 57			.parent_hws = (const struct clk_hw *[]){
 58				&apcs_alias0_clk_src.clkr.hw },
 59			.num_parents = 1,
 60			.flags = CLK_SET_RATE_PARENT,
 61			.ops = &clk_branch2_ops,
 62		},
 63	},
 64};
 65
 66static const struct regmap_config apss_ipq6018_regmap_config = {
 67	.reg_bits       = 32,
 68	.reg_stride     = 4,
 69	.val_bits       = 32,
 70	.max_register   = 0x1000,
 71	.fast_io        = true,
 72};
 73
 74static struct clk_regmap *apss_ipq6018_clks[] = {
 75	[APCS_ALIAS0_CLK_SRC] = &apcs_alias0_clk_src.clkr,
 76	[APCS_ALIAS0_CORE_CLK] = &apcs_alias0_core_clk.clkr,
 77};
 78
 79static const struct qcom_cc_desc apss_ipq6018_desc = {
 80	.config = &apss_ipq6018_regmap_config,
 81	.clks = apss_ipq6018_clks,
 82	.num_clks = ARRAY_SIZE(apss_ipq6018_clks),
 83};
 84
 85static int apss_ipq6018_probe(struct platform_device *pdev)
 86{
 87	struct regmap *regmap;
 88
 89	regmap = dev_get_regmap(pdev->dev.parent, NULL);
 90	if (!regmap)
 91		return -ENODEV;
 92
 93	return qcom_cc_really_probe(pdev, &apss_ipq6018_desc, regmap);
 94}
 95
 96static struct platform_driver apss_ipq6018_driver = {
 97	.probe = apss_ipq6018_probe,
 98	.driver = {
 99		.name   = "qcom,apss-ipq6018-clk",
100	},
101};
102
103module_platform_driver(apss_ipq6018_driver);
104
105MODULE_DESCRIPTION("QCOM APSS IPQ 6018 CLK Driver");
106MODULE_LICENSE("GPL v2");