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Commit e095a648 authored by Rohit Kumar's avatar Rohit Kumar
Browse files

Asoc: audio-ext-clk: Add support for external clock source 



Add support to select clk_src, clk_freq for lpass_mclk for
external clock source.

CRs-Fixed: 1105456
Change-Id: I85a14b68f27759ccd31de2ebf8f60d3fd057e5b9
Signed-off-by: default avatarRohit Kumar <rohitkr@codeaurora.org>
parent a1b5fc92

sound/soc/codecs/audio-ext-clk.c

+37 −12
Original line number Diff line number Diff line 
/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.

/* 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
@@ -454,20 +454,37 @@ err: 
	return -EINVAL;

}



static void audio_ref_update_afe_mclk_id(const char *ptr)

static void audio_ref_update_afe_mclk_id(const char *ptr, enum clk_mux mux)

{

	uint32_t *clk_id;



	switch (mux) {

	case AP_CLK2:

		clk_id = &clk2_config.clk_id;

		break;

	case LPASS_MCLK:

		clk_id = &digital_cdc_core_clk.clk_id;

		break;

	case LPASS_MCLK2:

		clk_id = &lpass_default2.clk_id;

		break;

	default:

		pr_err("%s Not a valid MUX ID: %d\n", __func__, mux);

		return;

	}



	if (!strcmp(ptr, "pri_mclk")) {

		pr_debug("%s: updating the mclk id with primary mclk\n",

				__func__);

		clk2_config.clk_id = Q6AFE_LPASS_CLK_ID_MCLK_1;

		*clk_id = Q6AFE_LPASS_CLK_ID_MCLK_1;

	} else if (!strcmp(ptr, "sec_mclk")) {

		pr_debug("%s: updating the mclk id with secondary mclk\n",

				__func__);

		clk2_config.clk_id = Q6AFE_LPASS_CLK_ID_MCLK_2;

		*clk_id = Q6AFE_LPASS_CLK_ID_MCLK_2;

	} else {

		pr_debug("%s: updating the mclk id with default\n", __func__);

	}

	pr_debug("%s: clk_id = 0x%x\n", __func__, clk2_config.clk_id);

	pr_debug("%s: clk_id = 0x%x\n", __func__, *clk_id);

}



static int audio_ref_clk_probe(struct platform_device *pdev)
@@ -487,10 +504,19 @@ static int audio_ref_clk_probe(struct platform_device *pdev) 
		dev_dbg(&pdev->dev, "%s: qcom,lpass-clock is undefined\n",

				__func__);





	ret = of_property_read_string(pdev->dev.of_node,

				mclk_id, &mclk_str);

	if (ret)

		dev_dbg(&pdev->dev, "%s:of read string %s not present %d\n",

				__func__, mclk_id, ret);



	ret = of_property_read_u32(pdev->dev.of_node,

			"qcom,codec-mclk-clk-freq",

			&mclk_freq);

	if (!ret && (mclk_freq == 12288000 || audio_lpass_mclk.lpass_clock)) {

		digital_cdc_core_clk.clk_freq_in_hz = mclk_freq;



		ret = of_property_read_u32(pdev->dev.of_node, "reg",

				&lpass_csr_gpio_mux_spkrctl_reg);

		if (!ret) {
@@ -498,6 +524,11 @@ static int audio_ref_clk_probe(struct platform_device *pdev) 
				ioremap(lpass_csr_gpio_mux_spkrctl_reg, 4);

		}



		if (mclk_str) {

			audio_ref_update_afe_mclk_id(mclk_str, LPASS_MCLK);

			audio_ref_update_afe_mclk_id(mclk_str, LPASS_MCLK2);

		}



		ret = audio_get_pinctrl(pdev, LPASS_MCLK);

		if (ret)

			dev_err(&pdev->dev, "%s: Parsing pinctrl %s failed\n",
@@ -516,14 +547,8 @@ static int audio_ref_clk_probe(struct platform_device *pdev) 
		return ret;

	}



	ret = of_property_read_string(pdev->dev.of_node,

				mclk_id, &mclk_str);

	if (ret)

		dev_dbg(&pdev->dev, "%s:of read string %s not present %d\n",

				__func__, mclk_id, ret);



	if (mclk_str)

		audio_ref_update_afe_mclk_id(mclk_str);

		audio_ref_update_afe_mclk_id(mclk_str, AP_CLK2);



	clk_gpio = of_get_named_gpio(pdev->dev.of_node,

				     "qcom,audio-ref-clk-gpio", 0);