blob: 72f16f5848dd857b8b7b3bf4e98e6e77faf5feb4 [file] [log] [blame]
/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/clk/msm-clk-provider.h>
#include <linux/clk/msm-clk.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <dt-bindings/clock/audio-ext-clk.h>
#include <sound/q6afe-v2.h>
#include "audio-ext-clk-up.h"
struct pinctrl_info {
struct pinctrl *pinctrl;
struct pinctrl_state *sleep;
struct pinctrl_state *active;
};
struct audio_ext_ap_clk {
bool enabled;
int gpio;
struct clk c;
};
struct audio_ext_pmi_clk {
int gpio;
struct clk c;
};
struct audio_ext_ap_clk2 {
bool enabled;
struct pinctrl_info pnctrl_info;
struct clk c;
};
static struct afe_clk_set clk2_config = {
Q6AFE_LPASS_CLK_CONFIG_API_VERSION,
Q6AFE_LPASS_CLK_ID_SPEAKER_I2S_OSR,
Q6AFE_LPASS_IBIT_CLK_11_P2896_MHZ,
Q6AFE_LPASS_CLK_ATTRIBUTE_COUPLE_NO,
Q6AFE_LPASS_CLK_ROOT_DEFAULT,
0,
};
static inline struct audio_ext_ap_clk *to_audio_ap_clk(struct clk *clk)
{
return container_of(clk, struct audio_ext_ap_clk, c);
}
static int audio_ext_clk_prepare(struct clk *clk)
{
struct audio_ext_ap_clk *audio_clk = to_audio_ap_clk(clk);
pr_debug("%s: gpio: %d\n", __func__, audio_clk->gpio);
if (gpio_is_valid(audio_clk->gpio))
return gpio_direction_output(audio_clk->gpio, 1);
return 0;
}
static void audio_ext_clk_unprepare(struct clk *clk)
{
struct audio_ext_ap_clk *audio_clk = to_audio_ap_clk(clk);
pr_debug("%s: gpio: %d\n", __func__, audio_clk->gpio);
if (gpio_is_valid(audio_clk->gpio))
gpio_direction_output(audio_clk->gpio, 0);
}
static inline struct audio_ext_ap_clk2 *to_audio_ap_clk2(struct clk *clk)
{
return container_of(clk, struct audio_ext_ap_clk2, c);
}
static int audio_ext_clk2_prepare(struct clk *clk)
{
struct audio_ext_ap_clk2 *audio_clk2 = to_audio_ap_clk2(clk);
struct pinctrl_info *pnctrl_info = &audio_clk2->pnctrl_info;
int ret;
if (!pnctrl_info->pinctrl || !pnctrl_info->active)
return 0;
ret = pinctrl_select_state(pnctrl_info->pinctrl,
pnctrl_info->active);
if (ret) {
pr_err("%s: active state select failed with %d\n",
__func__, ret);
return -EIO;
}
clk2_config.enable = 1;
ret = afe_set_lpass_clk_cfg(IDX_RSVD_3, &clk2_config);
if (ret < 0) {
pr_err("%s: failed to set clock, ret = %d\n", __func__, ret);
return -EINVAL;
}
return 0;
}
static void audio_ext_clk2_unprepare(struct clk *clk)
{
struct audio_ext_ap_clk2 *audio_clk2 = to_audio_ap_clk2(clk);
struct pinctrl_info *pnctrl_info = &audio_clk2->pnctrl_info;
int ret;
if (!pnctrl_info->pinctrl || !pnctrl_info->sleep)
return;
ret = pinctrl_select_state(pnctrl_info->pinctrl,
pnctrl_info->sleep);
if (ret)
pr_err("%s: sleep state select failed with %d\n",
__func__, ret);
clk2_config.enable = 0;
ret = afe_set_lpass_clk_cfg(IDX_RSVD_3, &clk2_config);
if (ret < 0)
pr_err("%s: failed to reset clock, ret = %d\n", __func__, ret);
}
static const struct clk_ops audio_ext_ap_clk_ops = {
.prepare = audio_ext_clk_prepare,
.unprepare = audio_ext_clk_unprepare,
};
static const struct clk_ops audio_ext_ap_clk2_ops = {
.prepare = audio_ext_clk2_prepare,
.unprepare = audio_ext_clk2_unprepare,
};
static struct audio_ext_pmi_clk audio_pmi_clk = {
.gpio = -EINVAL,
.c = {
.dbg_name = "audio_ext_pmi_clk",
.ops = &clk_ops_dummy,
CLK_INIT(audio_pmi_clk.c),
},
};
static struct audio_ext_pmi_clk audio_pmi_lnbb_clk = {
.gpio = -EINVAL,
.c = {
.dbg_name = "audio_ext_pmi_lnbb_clk",
.ops = &clk_ops_dummy,
CLK_INIT(audio_pmi_lnbb_clk.c),
},
};
static struct audio_ext_ap_clk audio_ap_clk = {
.gpio = -EINVAL,
.c = {
.dbg_name = "audio_ext_ap_clk",
.ops = &audio_ext_ap_clk_ops,
CLK_INIT(audio_ap_clk.c),
},
};
static struct audio_ext_ap_clk2 audio_ap_clk2 = {
.c = {
.dbg_name = "audio_ext_ap_clk2",
.ops = &audio_ext_ap_clk2_ops,
CLK_INIT(audio_ap_clk2.c),
},
};
static struct clk_lookup audio_ref_clock[] = {
CLK_LIST(audio_ap_clk),
CLK_LIST(audio_pmi_clk),
CLK_LIST(audio_pmi_lnbb_clk),
CLK_LIST(audio_ap_clk2),
};
static int audio_get_pinctrl(struct platform_device *pdev)
{
struct pinctrl_info *pnctrl_info;
struct pinctrl *pinctrl;
int ret;
pnctrl_info = &audio_ap_clk2.pnctrl_info;
if (pnctrl_info->pinctrl) {
dev_dbg(&pdev->dev, "%s: already requested before\n",
__func__);
return -EINVAL;
}
pinctrl = devm_pinctrl_get(&pdev->dev);
if (IS_ERR_OR_NULL(pinctrl)) {
dev_dbg(&pdev->dev, "%s: Unable to get pinctrl handle\n",
__func__);
return -EINVAL;
}
pnctrl_info->pinctrl = pinctrl;
/* get all state handles from Device Tree */
pnctrl_info->sleep = pinctrl_lookup_state(pinctrl, "sleep");
if (IS_ERR(pnctrl_info->sleep)) {
dev_err(&pdev->dev, "%s: could not get sleep pinstate\n",
__func__);
goto err;
}
pnctrl_info->active = pinctrl_lookup_state(pinctrl, "active");
if (IS_ERR(pnctrl_info->active)) {
dev_err(&pdev->dev, "%s: could not get active pinstate\n",
__func__);
goto err;
}
/* Reset the TLMM pins to a default state */
ret = pinctrl_select_state(pnctrl_info->pinctrl,
pnctrl_info->sleep);
if (ret) {
dev_err(&pdev->dev, "%s: Disable TLMM pins failed with %d\n",
__func__, ret);
goto err;
}
return 0;
err:
devm_pinctrl_put(pnctrl_info->pinctrl);
return -EINVAL;
}
static int audio_ref_clk_probe(struct platform_device *pdev)
{
int clk_gpio;
int ret;
struct clk *audio_clk;
clk_gpio = of_get_named_gpio(pdev->dev.of_node,
"qcom,audio-ref-clk-gpio", 0);
if (clk_gpio > 0) {
ret = gpio_request(clk_gpio, "EXT_CLK");
if (ret) {
dev_err(&pdev->dev,
"Request ext clk gpio failed %d, err:%d\n",
clk_gpio, ret);
goto err;
}
if (of_property_read_bool(pdev->dev.of_node,
"qcom,node_has_rpm_clock")) {
audio_clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(audio_clk)) {
dev_err(&pdev->dev, "Failed to get RPM div clk\n");
ret = PTR_ERR(audio_clk);
goto err_gpio;
}
audio_pmi_clk.c.parent = audio_clk;
audio_pmi_clk.gpio = clk_gpio;
} else
audio_ap_clk.gpio = clk_gpio;
} else {
if (of_property_read_bool(pdev->dev.of_node,
"qcom,node_has_rpm_clock")) {
audio_clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(audio_clk)) {
dev_err(&pdev->dev, "Failed to get lnbbclk2\n");
ret = PTR_ERR(audio_clk);
goto err;
}
audio_pmi_lnbb_clk.c.parent = audio_clk;
audio_pmi_lnbb_clk.gpio = -EINVAL;
}
}
ret = audio_get_pinctrl(pdev);
if (ret)
dev_dbg(&pdev->dev, "%s: Parsing pinctrl failed\n",
__func__);
ret = of_msm_clock_register(pdev->dev.of_node, audio_ref_clock,
ARRAY_SIZE(audio_ref_clock));
if (ret) {
dev_err(&pdev->dev, "%s: audio ref clock register failed\n",
__func__);
goto err_gpio;
}
return 0;
err_gpio:
gpio_free(clk_gpio);
err:
return ret;
}
static int audio_ref_clk_remove(struct platform_device *pdev)
{
struct pinctrl_info *pnctrl_info = &audio_ap_clk2.pnctrl_info;
if (audio_pmi_clk.gpio > 0)
gpio_free(audio_pmi_clk.gpio);
else if (audio_ap_clk.gpio > 0)
gpio_free(audio_ap_clk.gpio);
if (pnctrl_info->pinctrl) {
devm_pinctrl_put(pnctrl_info->pinctrl);
pnctrl_info->pinctrl = NULL;
}
return 0;
}
static const struct of_device_id audio_ref_clk_match[] = {
{.compatible = "qcom,audio-ref-clk"},
{}
};
MODULE_DEVICE_TABLE(of, audio_ref_clk_match);
static struct platform_driver audio_ref_clk_driver = {
.driver = {
.name = "audio-ref-clk",
.owner = THIS_MODULE,
.of_match_table = audio_ref_clk_match,
},
.probe = audio_ref_clk_probe,
.remove = audio_ref_clk_remove,
};
int audio_ref_clk_platform_init(void)
{
return platform_driver_register(&audio_ref_clk_driver);
}
void audio_ref_clk_platform_exit(void)
{
platform_driver_unregister(&audio_ref_clk_driver);
}
MODULE_DESCRIPTION("Audio Ref Clock module platform driver");
MODULE_LICENSE("GPL v2");