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// SPDX-License-Identifier: GPL-2.0
/*
* LPASS Audio CC and Always ON CC Glitch Free Mux clock driver
*
* Copyright (c) 2020 Linaro Ltd.
* Author: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/pm_clock.h>
#include <linux/pm_runtime.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <dt-bindings/clock/qcom,sm8250-lpass-audiocc.h>
#include <dt-bindings/clock/qcom,sm8250-lpass-aoncc.h>
struct lpass_gfm {
struct device *dev;
void __iomem *base;
};
struct clk_gfm {
unsigned int mux_reg;
unsigned int mux_mask;
struct clk_hw hw;
struct lpass_gfm *priv;
void __iomem *gfm_mux;
};
#define to_clk_gfm(_hw) container_of(_hw, struct clk_gfm, hw)
static u8 clk_gfm_get_parent(struct clk_hw *hw)
{
struct clk_gfm *clk = to_clk_gfm(hw);
return readl(clk->gfm_mux) & clk->mux_mask;
}
static int clk_gfm_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_gfm *clk = to_clk_gfm(hw);
unsigned int val;
val = readl(clk->gfm_mux);
if (index)
val |= clk->mux_mask;
else
val &= ~clk->mux_mask;
writel(val, clk->gfm_mux);
return 0;
}
static const struct clk_ops clk_gfm_ops = {
.get_parent = clk_gfm_get_parent,
.set_parent = clk_gfm_set_parent,
.determine_rate = __clk_mux_determine_rate,
};
static struct clk_gfm lpass_gfm_va_mclk = {
.mux_reg = 0x20000,
.mux_mask = BIT(0),
.hw.init = &(struct clk_init_data) {
.name = "VA_MCLK",
.ops = &clk_gfm_ops,
.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
.num_parents = 2,
.parent_data = (const struct clk_parent_data[]){
{
.index = 0,
.fw_name = "LPASS_CLK_ID_TX_CORE_MCLK",
}, {
.index = 1,
.fw_name = "LPASS_CLK_ID_VA_CORE_MCLK",
},
},
},
};
static struct clk_gfm lpass_gfm_tx_npl = {
.mux_reg = 0x20000,
.mux_mask = BIT(0),
.hw.init = &(struct clk_init_data) {
.name = "TX_NPL",
.ops = &clk_gfm_ops,
.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
.parent_data = (const struct clk_parent_data[]){
{
.index = 0,
.fw_name = "LPASS_CLK_ID_TX_CORE_NPL_MCLK",
}, {
.index = 1,
.fw_name = "LPASS_CLK_ID_VA_CORE_2X_MCLK",
},
},
.num_parents = 2,
},
};
static struct clk_gfm lpass_gfm_wsa_mclk = {
.mux_reg = 0x220d8,
.mux_mask = BIT(0),
.hw.init = &(struct clk_init_data) {
.name = "WSA_MCLK",
.ops = &clk_gfm_ops,
.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
.parent_data = (const struct clk_parent_data[]){
{
.index = 0,
.fw_name = "LPASS_CLK_ID_TX_CORE_MCLK",
}, {
.index = 1,
.fw_name = "LPASS_CLK_ID_WSA_CORE_MCLK",
},
},
.num_parents = 2,
},
};
static struct clk_gfm lpass_gfm_wsa_npl = {
.mux_reg = 0x220d8,
.mux_mask = BIT(0),
.hw.init = &(struct clk_init_data) {
.name = "WSA_NPL",
.ops = &clk_gfm_ops,
.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
.parent_data = (const struct clk_parent_data[]){
{
.index = 0,
.fw_name = "LPASS_CLK_ID_TX_CORE_NPL_MCLK",
}, {
.index = 1,
.fw_name = "LPASS_CLK_ID_WSA_CORE_NPL_MCLK",
},
},
.num_parents = 2,
},
};
static struct clk_gfm lpass_gfm_rx_mclk_mclk2 = {
.mux_reg = 0x240d8,
.mux_mask = BIT(0),
.hw.init = &(struct clk_init_data) {
.name = "RX_MCLK_MCLK2",
.ops = &clk_gfm_ops,
.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
.parent_data = (const struct clk_parent_data[]){
{
.index = 0,
.fw_name = "LPASS_CLK_ID_TX_CORE_MCLK",
}, {
.index = 1,
.fw_name = "LPASS_CLK_ID_RX_CORE_MCLK",
},
},
.num_parents = 2,
},
};
static struct clk_gfm lpass_gfm_rx_npl = {
.mux_reg = 0x240d8,
.mux_mask = BIT(0),
.hw.init = &(struct clk_init_data) {
.name = "RX_NPL",
.ops = &clk_gfm_ops,
.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
.parent_data = (const struct clk_parent_data[]){
{
.index = 0,
.fw_name = "LPASS_CLK_ID_TX_CORE_NPL_MCLK",
}, {
.index = 1,
.fw_name = "LPASS_CLK_ID_RX_CORE_NPL_MCLK",
},
},
.num_parents = 2,
},
};
static struct clk_gfm *aoncc_gfm_clks[] = {
[LPASS_CDC_VA_MCLK] = &lpass_gfm_va_mclk,
[LPASS_CDC_TX_NPL] = &lpass_gfm_tx_npl,
};
static struct clk_hw_onecell_data aoncc_hw_onecell_data = {
.hws = {
[LPASS_CDC_VA_MCLK] = &lpass_gfm_va_mclk.hw,
[LPASS_CDC_TX_NPL] = &lpass_gfm_tx_npl.hw,
},
.num = ARRAY_SIZE(aoncc_gfm_clks),
};
static struct clk_gfm *audiocc_gfm_clks[] = {
[LPASS_CDC_WSA_NPL] = &lpass_gfm_wsa_npl,
[LPASS_CDC_WSA_MCLK] = &lpass_gfm_wsa_mclk,
[LPASS_CDC_RX_NPL] = &lpass_gfm_rx_npl,
[LPASS_CDC_RX_MCLK_MCLK2] = &lpass_gfm_rx_mclk_mclk2,
};
static struct clk_hw_onecell_data audiocc_hw_onecell_data = {
.hws = {
[LPASS_CDC_WSA_NPL] = &lpass_gfm_wsa_npl.hw,
[LPASS_CDC_WSA_MCLK] = &lpass_gfm_wsa_mclk.hw,
[LPASS_CDC_RX_NPL] = &lpass_gfm_rx_npl.hw,
[LPASS_CDC_RX_MCLK_MCLK2] = &lpass_gfm_rx_mclk_mclk2.hw,
},
.num = ARRAY_SIZE(audiocc_gfm_clks),
};
struct lpass_gfm_data {
struct clk_hw_onecell_data *onecell_data;
struct clk_gfm **gfm_clks;
};
static struct lpass_gfm_data audiocc_data = {
.onecell_data = &audiocc_hw_onecell_data,
.gfm_clks = audiocc_gfm_clks,
};
static struct lpass_gfm_data aoncc_data = {
.onecell_data = &aoncc_hw_onecell_data,
.gfm_clks = aoncc_gfm_clks,
};
static int lpass_gfm_clk_driver_probe(struct platform_device *pdev)
{
const struct lpass_gfm_data *data;
struct device *dev = &pdev->dev;
struct clk_gfm *gfm;
struct lpass_gfm *cc;
int err, i;
data = of_device_get_match_data(dev);
if (!data)
return -EINVAL;
cc = devm_kzalloc(dev, sizeof(*cc), GFP_KERNEL);
if (!cc)
return -ENOMEM;
cc->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(cc->base))
return PTR_ERR(cc->base);
pm_runtime_enable(dev);
err = pm_clk_create(dev);
if (err)
goto pm_clk_err;
err = of_pm_clk_add_clks(dev);
if (err < 0) {
dev_dbg(dev, "Failed to get lpass core voting clocks\n");
goto clk_reg_err;
}
for (i = 0; i < data->onecell_data->num; i++) {
if (!data->gfm_clks[i])
continue;
gfm = data->gfm_clks[i];
gfm->priv = cc;
gfm->gfm_mux = cc->base;
gfm->gfm_mux = gfm->gfm_mux + data->gfm_clks[i]->mux_reg;
err = devm_clk_hw_register(dev, &data->gfm_clks[i]->hw);
if (err)
goto clk_reg_err;
}
err = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
data->onecell_data);
if (err)
goto clk_reg_err;
return 0;
clk_reg_err:
pm_clk_destroy(dev);
pm_clk_err:
pm_runtime_disable(dev);
return err;
}
static const struct of_device_id lpass_gfm_clk_match_table[] = {
{
.compatible = "qcom,sm8250-lpass-aoncc",
.data = &aoncc_data,
},
{
.compatible = "qcom,sm8250-lpass-audiocc",
.data = &audiocc_data,
},
{ }
};
MODULE_DEVICE_TABLE(of, lpass_gfm_clk_match_table);
static const struct dev_pm_ops lpass_gfm_pm_ops = {
SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
};
static struct platform_driver lpass_gfm_clk_driver = {
.probe = lpass_gfm_clk_driver_probe,
.driver = {
.name = "lpass-gfm-clk",
.of_match_table = lpass_gfm_clk_match_table,
.pm = &lpass_gfm_pm_ops,
},
};
module_platform_driver(lpass_gfm_clk_driver);
MODULE_LICENSE("GPL v2");
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