// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
 */

#include <linux/bitops.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_clock.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>

#include <dt-bindings/clock/qcom,q6sstopcc-qcs404.h>

#include "clk-regmap.h"
#include "clk-branch.h"
#include "common.h"
#include "reset.h"

static struct clk_branch lcc_ahbfabric_cbc_clk = {
        .halt_reg = 0x1b004,
        .halt_check = BRANCH_HALT,
        .clkr = {
                .enable_reg = 0x1b004,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "lcc_ahbfabric_cbc_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

static struct clk_branch lcc_q6ss_ahbs_cbc_clk = {
        .halt_reg = 0x22000,
        .halt_check = BRANCH_VOTED,
        .clkr = {
                .enable_reg = 0x22000,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "lcc_q6ss_ahbs_cbc_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

static struct clk_branch lcc_q6ss_tcm_slave_cbc_clk = {
        .halt_reg = 0x1c000,
        .halt_check = BRANCH_VOTED,
        .clkr = {
                .enable_reg = 0x1c000,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "lcc_q6ss_tcm_slave_cbc_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

static struct clk_branch lcc_q6ss_ahbm_cbc_clk = {
        .halt_reg = 0x22004,
        .halt_check = BRANCH_VOTED,
        .clkr = {
                .enable_reg = 0x22004,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "lcc_q6ss_ahbm_cbc_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

static struct clk_branch lcc_q6ss_axim_cbc_clk = {
        .halt_reg = 0x1c004,
        .halt_check = BRANCH_VOTED,
        .clkr = {
                .enable_reg = 0x1c004,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "lcc_q6ss_axim_cbc_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

static struct clk_branch lcc_q6ss_bcr_sleep_clk = {
        .halt_reg = 0x6004,
        .halt_check = BRANCH_VOTED,
        .clkr = {
                .enable_reg = 0x6004,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "lcc_q6ss_bcr_sleep_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

/* TCSR clock */
static struct clk_branch tcsr_lcc_csr_cbcr_clk = {
        .halt_reg = 0x8008,
        .halt_check = BRANCH_VOTED,
        .clkr = {
                .enable_reg = 0x8008,
                .enable_mask = BIT(0),
                .hw.init = &(struct clk_init_data){
                        .name = "tcsr_lcc_csr_cbcr_clk",
                        .ops = &clk_branch2_ops,
                },
        },
};

static struct regmap_config q6sstop_regmap_config = {
        .reg_bits       = 32,
        .reg_stride     = 4,
        .val_bits       = 32,
        .fast_io        = true,
};

static struct clk_regmap *q6sstop_qcs404_clocks[] = {
        [LCC_AHBFABRIC_CBC_CLK] = &lcc_ahbfabric_cbc_clk.clkr,
        [LCC_Q6SS_AHBS_CBC_CLK] = &lcc_q6ss_ahbs_cbc_clk.clkr,
        [LCC_Q6SS_TCM_SLAVE_CBC_CLK] = &lcc_q6ss_tcm_slave_cbc_clk.clkr,
        [LCC_Q6SS_AHBM_CBC_CLK] = &lcc_q6ss_ahbm_cbc_clk.clkr,
        [LCC_Q6SS_AXIM_CBC_CLK] = &lcc_q6ss_axim_cbc_clk.clkr,
        [LCC_Q6SS_BCR_SLEEP_CLK] = &lcc_q6ss_bcr_sleep_clk.clkr,
};

static const struct qcom_reset_map q6sstop_qcs404_resets[] = {
        [Q6SSTOP_BCR_RESET] = { 0x6000 },
};

static const struct qcom_cc_desc q6sstop_qcs404_desc = {
        .config = &q6sstop_regmap_config,
        .clks = q6sstop_qcs404_clocks,
        .num_clks = ARRAY_SIZE(q6sstop_qcs404_clocks),
        .resets = q6sstop_qcs404_resets,
        .num_resets = ARRAY_SIZE(q6sstop_qcs404_resets),
};

static struct clk_regmap *tcsr_qcs404_clocks[] = {
        [TCSR_Q6SS_LCC_CBCR_CLK] = &tcsr_lcc_csr_cbcr_clk.clkr,
};

static const struct qcom_cc_desc tcsr_qcs404_desc = {
        .config = &q6sstop_regmap_config,
        .clks = tcsr_qcs404_clocks,
        .num_clks = ARRAY_SIZE(tcsr_qcs404_clocks),
};

static const struct of_device_id q6sstopcc_qcs404_match_table[] = {
        { .compatible = "qcom,qcs404-q6sstopcc" },
        { }
};
MODULE_DEVICE_TABLE(of, q6sstopcc_qcs404_match_table);

static int q6sstopcc_qcs404_probe(struct platform_device *pdev)
{
        const struct qcom_cc_desc *desc;
        int ret;

        ret = devm_pm_runtime_enable(&pdev->dev);
        if (ret)
                return ret;

        ret = devm_pm_clk_create(&pdev->dev);
        if (ret)
                return ret;

        ret = pm_clk_add(&pdev->dev, NULL);
        if (ret < 0) {
                dev_err(&pdev->dev, "failed to acquire iface clock\n");
                return ret;
        }

        ret = pm_runtime_resume_and_get(&pdev->dev);
        if (ret)
                return ret;

        q6sstop_regmap_config.name = "q6sstop_tcsr";
        desc = &tcsr_qcs404_desc;

        ret = qcom_cc_probe_by_index(pdev, 1, desc);
        if (ret)
                goto err_put_rpm;

        q6sstop_regmap_config.name = "q6sstop_cc";
        desc = &q6sstop_qcs404_desc;

        ret = qcom_cc_probe_by_index(pdev, 0, desc);
        if (ret)
                goto err_put_rpm;

        pm_runtime_put(&pdev->dev);

        return 0;

err_put_rpm:
        pm_runtime_put_sync(&pdev->dev);

        return ret;
}

static const struct dev_pm_ops q6sstopcc_pm_ops = {
        SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
};

static struct platform_driver q6sstopcc_qcs404_driver = {
        .probe          = q6sstopcc_qcs404_probe,
        .driver         = {
                .name   = "qcs404-q6sstopcc",
                .of_match_table = q6sstopcc_qcs404_match_table,
                .pm = &q6sstopcc_pm_ops,
        },
};

module_platform_driver(q6sstopcc_qcs404_driver);

MODULE_DESCRIPTION("QTI QCS404 Q6SSTOP Clock Controller Driver");
MODULE_LICENSE("GPL v2");