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/*
 * Copyright (c) 2014, The Linux Foundation. All rights reserved.
 * Copyright (c) BayLibre, SAS.
 * Author : Neil Armstrong <narmstrong@baylibre.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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/bitops.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/clk-provider.h>
#include <linux/regmap.h>

#include <dt-bindings/clock/qcom,lcc-mdm9615.h>

#include "common.h"
#include "clk-regmap.h"
#include "clk-pll.h"
#include "clk-rcg.h"
#include "clk-branch.h"
#include "clk-regmap-divider.h"
#include "clk-regmap-mux.h"

static struct clk_pll pll4 = {
	.l_reg = 0x4,
	.m_reg = 0x8,
	.n_reg = 0xc,
	.config_reg = 0x14,
	.mode_reg = 0x0,
	.status_reg = 0x18,
	.status_bit = 16,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "pll4",
		.parent_names = (const char *[]){ "cxo" },
		.num_parents = 1,
		.ops = &clk_pll_ops,
	},
};

enum {
	P_CXO,
	P_PLL4,
};

static const struct parent_map lcc_cxo_pll4_map[] = {
	{ P_CXO, 0 },
	{ P_PLL4, 2 }
};

static const char * const lcc_cxo_pll4[] = {
	"cxo",
	"pll4_vote",
};

static struct freq_tbl clk_tbl_aif_osr_492[] = {
	{   512000, P_PLL4, 4, 1, 240 },
	{   768000, P_PLL4, 4, 1, 160 },
	{  1024000, P_PLL4, 4, 1, 120 },
	{  1536000, P_PLL4, 4, 1,  80 },
	{  2048000, P_PLL4, 4, 1,  60 },
	{  3072000, P_PLL4, 4, 1,  40 },
	{  4096000, P_PLL4, 4, 1,  30 },
	{  6144000, P_PLL4, 4, 1,  20 },
	{  8192000, P_PLL4, 4, 1,  15 },
	{ 12288000, P_PLL4, 4, 1,  10 },
	{ 24576000, P_PLL4, 4, 1,   5 },
	{ 27000000, P_CXO,  1, 0,   0 },
	{ }
};

static struct freq_tbl clk_tbl_aif_osr_393[] = {
	{   512000, P_PLL4, 4, 1, 192 },
	{   768000, P_PLL4, 4, 1, 128 },
	{  1024000, P_PLL4, 4, 1,  96 },
	{  1536000, P_PLL4, 4, 1,  64 },
	{  2048000, P_PLL4, 4, 1,  48 },
	{  3072000, P_PLL4, 4, 1,  32 },
	{  4096000, P_PLL4, 4, 1,  24 },
	{  6144000, P_PLL4, 4, 1,  16 },
	{  8192000, P_PLL4, 4, 1,  12 },
	{ 12288000, P_PLL4, 4, 1,   8 },
	{ 24576000, P_PLL4, 4, 1,   4 },
	{ 27000000, P_CXO,  1, 0,   0 },
	{ }
};

static struct clk_rcg mi2s_osr_src = {
	.ns_reg = 0x48,
	.md_reg = 0x4c,
	.mn = {
		.mnctr_en_bit = 8,
		.mnctr_reset_bit = 7,
		.mnctr_mode_shift = 5,
		.n_val_shift = 24,
		.m_val_shift = 8,
		.width = 8,
	},
	.p = {
		.pre_div_shift = 3,
		.pre_div_width = 2,
	},
	.s = {
		.src_sel_shift = 0,
		.parent_map = lcc_cxo_pll4_map,
	},
	.freq_tbl = clk_tbl_aif_osr_393,
	.clkr = {
		.enable_reg = 0x48,
		.enable_mask = BIT(9),
		.hw.init = &(struct clk_init_data){
			.name = "mi2s_osr_src",
			.parent_names = lcc_cxo_pll4,
			.num_parents = 2,
			.ops = &clk_rcg_ops,
			.flags = CLK_SET_RATE_GATE,
		},
	},
};

static const char * const lcc_mi2s_parents[] = {
	"mi2s_osr_src",
};

static struct clk_branch mi2s_osr_clk = {
	.halt_reg = 0x50,
	.halt_bit = 1,
	.halt_check = BRANCH_HALT_ENABLE,
	.clkr = {
		.enable_reg = 0x48,
		.enable_mask = BIT(17),
		.hw.init = &(struct clk_init_data){
			.name = "mi2s_osr_clk",
			.parent_names = lcc_mi2s_parents,
			.num_parents = 1,
			.ops = &clk_branch_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

static struct clk_regmap_div mi2s_div_clk = {
	.reg = 0x48,
	.shift = 10,
	.width = 4,
	.clkr = {
		.enable_reg = 0x48,
		.enable_mask = BIT(15),
		.hw.init = &(struct clk_init_data){
			.name = "mi2s_div_clk",
			.parent_names = lcc_mi2s_parents,
			.num_parents = 1,
			.ops = &clk_regmap_div_ops,
		},
	},
};

static struct clk_branch mi2s_bit_div_clk = {
	.halt_reg = 0x50,
	.halt_bit = 0,
	.halt_check = BRANCH_HALT_ENABLE,
	.clkr = {
		.enable_reg = 0x48,
		.enable_mask = BIT(15),
		.hw.init = &(struct clk_init_data){
			.name = "mi2s_bit_div_clk",
			.parent_names = (const char *[]){ "mi2s_div_clk" },
			.num_parents = 1,
			.ops = &clk_branch_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

static struct clk_regmap_mux mi2s_bit_clk = {
	.reg = 0x48,
	.shift = 14,
	.width = 1,
	.clkr = {
		.hw.init = &(struct clk_init_data){
			.name = "mi2s_bit_clk",
			.parent_names = (const char *[]){
				"mi2s_bit_div_clk",
				"mi2s_codec_clk",
			},
			.num_parents = 2,
			.ops = &clk_regmap_mux_closest_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

#define CLK_AIF_OSR_DIV(prefix, _ns, _md, hr)			\
static struct clk_rcg prefix##_osr_src = {			\
	.ns_reg = _ns,						\
	.md_reg = _md,						\
	.mn = {							\
		.mnctr_en_bit = 8,				\
		.mnctr_reset_bit = 7,				\
		.mnctr_mode_shift = 5,				\
		.n_val_shift = 24,				\
		.m_val_shift = 8,				\
		.width = 8,					\
	},							\
	.p = {							\
		.pre_div_shift = 3,				\
		.pre_div_width = 2,				\
	},							\
	.s = {							\
		.src_sel_shift = 0,				\
		.parent_map = lcc_cxo_pll4_map,			\
	},							\
	.freq_tbl = clk_tbl_aif_osr_393,			\
	.clkr = {						\
		.enable_reg = _ns,				\
		.enable_mask = BIT(9),				\
		.hw.init = &(struct clk_init_data){		\
			.name = #prefix "_osr_src",		\
			.parent_names = lcc_cxo_pll4,		\
			.num_parents = 2,			\
			.ops = &clk_rcg_ops,			\
			.flags = CLK_SET_RATE_GATE,		\
		},						\
	},							\
};								\
								\
static const char * const lcc_##prefix##_parents[] = {		\
	#prefix "_osr_src",					\
};								\
								\
static struct clk_branch prefix##_osr_clk = {			\
	.halt_reg = hr,						\
	.halt_bit = 1,						\
	.halt_check = BRANCH_HALT_ENABLE,			\
	.clkr = {						\
		.enable_reg = _ns,				\
		.enable_mask = BIT(21),				\
		.hw.init = &(struct clk_init_data){		\
			.name = #prefix "_osr_clk",		\
			.parent_names = lcc_##prefix##_parents,	\
			.num_parents = 1,			\
			.ops = &clk_branch_ops,			\
			.flags = CLK_SET_RATE_PARENT,		\
		},						\
	},							\
};								\
								\
static struct clk_regmap_div prefix##_div_clk = {		\
	.reg = _ns,						\
	.shift = 10,						\
	.width = 8,						\
	.clkr = {						\
		.hw.init = &(struct clk_init_data){		\
			.name = #prefix "_div_clk",		\
			.parent_names = lcc_##prefix##_parents,	\
			.num_parents = 1,			\
			.ops = &clk_regmap_div_ops,		\
		},						\
	},							\
};								\
								\
static struct clk_branch prefix##_bit_div_clk = {		\
	.halt_reg = hr,						\
	.halt_bit = 0,						\
	.halt_check = BRANCH_HALT_ENABLE,			\
	.clkr = {						\
		.enable_reg = _ns,				\
		.enable_mask = BIT(19),				\
		.hw.init = &(struct clk_init_data){		\
			.name = #prefix "_bit_div_clk",		\
			.parent_names = (const char *[]){	\
				#prefix "_div_clk"		\
			},					\
			.num_parents = 1,			\
			.ops = &clk_branch_ops,			\
			.flags = CLK_SET_RATE_PARENT,		\
		},						\
	},							\
};								\
								\
static struct clk_regmap_mux prefix##_bit_clk = {		\
	.reg = _ns,						\
	.shift = 18,						\
	.width = 1,						\
	.clkr = {						\
		.hw.init = &(struct clk_init_data){		\
			.name = #prefix "_bit_clk",		\
			.parent_names = (const char *[]){	\
				#prefix "_bit_div_clk",		\
				#prefix "_codec_clk",		\
			},					\
			.num_parents = 2,			\
			.ops = &clk_regmap_mux_closest_ops,	\
			.flags = CLK_SET_RATE_PARENT,		\
		},						\
	},							\
}

CLK_AIF_OSR_DIV(codec_i2s_mic, 0x60, 0x64, 0x68);
CLK_AIF_OSR_DIV(spare_i2s_mic, 0x78, 0x7c, 0x80);
CLK_AIF_OSR_DIV(codec_i2s_spkr, 0x6c, 0x70, 0x74);
CLK_AIF_OSR_DIV(spare_i2s_spkr, 0x84, 0x88, 0x8c);

static struct freq_tbl clk_tbl_pcm_492[] = {
	{   256000, P_PLL4, 4, 1, 480 },
	{   512000, P_PLL4, 4, 1, 240 },
	{   768000, P_PLL4, 4, 1, 160 },
	{  1024000, P_PLL4, 4, 1, 120 },
	{  1536000, P_PLL4, 4, 1,  80 },
	{  2048000, P_PLL4, 4, 1,  60 },
	{  3072000, P_PLL4, 4, 1,  40 },
	{  4096000, P_PLL4, 4, 1,  30 },
	{  6144000, P_PLL4, 4, 1,  20 },
	{  8192000, P_PLL4, 4, 1,  15 },
	{ 12288000, P_PLL4, 4, 1,  10 },
	{ 24576000, P_PLL4, 4, 1,   5 },
	{ 27000000, P_CXO,  1, 0,   0 },
	{ }
};

static struct freq_tbl clk_tbl_pcm_393[] = {
	{   256000, P_PLL4, 4, 1, 384 },
	{   512000, P_PLL4, 4, 1, 192 },
	{   768000, P_PLL4, 4, 1, 128 },
	{  1024000, P_PLL4, 4, 1,  96 },
	{  1536000, P_PLL4, 4, 1,  64 },
	{  2048000, P_PLL4, 4, 1,  48 },
	{  3072000, P_PLL4, 4, 1,  32 },
	{  4096000, P_PLL4, 4, 1,  24 },
	{  6144000, P_PLL4, 4, 1,  16 },
	{  8192000, P_PLL4, 4, 1,  12 },
	{ 12288000, P_PLL4, 4, 1,   8 },
	{ 24576000, P_PLL4, 4, 1,   4 },
	{ 27000000, P_CXO,  1, 0,   0 },
	{ }
};

static struct clk_rcg pcm_src = {
	.ns_reg = 0x54,
	.md_reg = 0x58,
	.mn = {
		.mnctr_en_bit = 8,
		.mnctr_reset_bit = 7,
		.mnctr_mode_shift = 5,
		.n_val_shift = 16,
		.m_val_shift = 16,
		.width = 16,
	},
	.p = {
		.pre_div_shift = 3,
		.pre_div_width = 2,
	},
	.s = {
		.src_sel_shift = 0,
		.parent_map = lcc_cxo_pll4_map,
	},
	.freq_tbl = clk_tbl_pcm_393,
	.clkr = {
		.enable_reg = 0x54,
		.enable_mask = BIT(9),
		.hw.init = &(struct clk_init_data){
			.name = "pcm_src",
			.parent_names = lcc_cxo_pll4,
			.num_parents = 2,
			.ops = &clk_rcg_ops,
			.flags = CLK_SET_RATE_GATE,
		},
	},
};

static struct clk_branch pcm_clk_out = {
	.halt_reg = 0x5c,
	.halt_bit = 0,
	.halt_check = BRANCH_HALT_ENABLE,
	.clkr = {
		.enable_reg = 0x54,
		.enable_mask = BIT(11),
		.hw.init = &(struct clk_init_data){
			.name = "pcm_clk_out",
			.parent_names = (const char *[]){ "pcm_src" },
			.num_parents = 1,
			.ops = &clk_branch_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

static struct clk_regmap_mux pcm_clk = {
	.reg = 0x54,
	.shift = 10,
	.width = 1,
	.clkr = {
		.hw.init = &(struct clk_init_data){
			.name = "pcm_clk",
			.parent_names = (const char *[]){
				"pcm_clk_out",
				"pcm_codec_clk",
			},
			.num_parents = 2,
			.ops = &clk_regmap_mux_closest_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

static struct clk_rcg slimbus_src = {
	.ns_reg = 0xcc,
	.md_reg = 0xd0,
	.mn = {
		.mnctr_en_bit = 8,
		.mnctr_reset_bit = 7,
		.mnctr_mode_shift = 5,
		.n_val_shift = 24,
		.m_val_shift = 8,
		.width = 8,
	},
	.p = {
		.pre_div_shift = 3,
		.pre_div_width = 2,
	},
	.s = {
		.src_sel_shift = 0,
		.parent_map = lcc_cxo_pll4_map,
	},
	.freq_tbl = clk_tbl_aif_osr_393,
	.clkr = {
		.enable_reg = 0xcc,
		.enable_mask = BIT(9),
		.hw.init = &(struct clk_init_data){
			.name = "slimbus_src",
			.parent_names = lcc_cxo_pll4,
			.num_parents = 2,
			.ops = &clk_rcg_ops,
			.flags = CLK_SET_RATE_GATE,
		},
	},
};

static const char * const lcc_slimbus_parents[] = {
	"slimbus_src",
};

static struct clk_branch audio_slimbus_clk = {
	.halt_reg = 0xd4,
	.halt_bit = 0,
	.halt_check = BRANCH_HALT_ENABLE,
	.clkr = {
		.enable_reg = 0xcc,
		.enable_mask = BIT(10),
		.hw.init = &(struct clk_init_data){
			.name = "audio_slimbus_clk",
			.parent_names = lcc_slimbus_parents,
			.num_parents = 1,
			.ops = &clk_branch_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

static struct clk_branch sps_slimbus_clk = {
	.halt_reg = 0xd4,
	.halt_bit = 1,
	.halt_check = BRANCH_HALT_ENABLE,
	.clkr = {
		.enable_reg = 0xcc,
		.enable_mask = BIT(12),
		.hw.init = &(struct clk_init_data){
			.name = "sps_slimbus_clk",
			.parent_names = lcc_slimbus_parents,
			.num_parents = 1,
			.ops = &clk_branch_ops,
			.flags = CLK_SET_RATE_PARENT,
		},
	},
};

static struct clk_regmap *lcc_mdm9615_clks[] = {
	[PLL4] = &pll4.clkr,
	[MI2S_OSR_SRC] = &mi2s_osr_src.clkr,
	[MI2S_OSR_CLK] = &mi2s_osr_clk.clkr,
	[MI2S_DIV_CLK] = &mi2s_div_clk.clkr,
	[MI2S_BIT_DIV_CLK] = &mi2s_bit_div_clk.clkr,
	[MI2S_BIT_CLK] = &mi2s_bit_clk.clkr,
	[PCM_SRC] = &pcm_src.clkr,
	[PCM_CLK_OUT] = &pcm_clk_out.clkr,
	[PCM_CLK] = &pcm_clk.clkr,
	[SLIMBUS_SRC] = &slimbus_src.clkr,
	[AUDIO_SLIMBUS_CLK] = &audio_slimbus_clk.clkr,
	[SPS_SLIMBUS_CLK] = &sps_slimbus_clk.clkr,
	[CODEC_I2S_MIC_OSR_SRC] = &codec_i2s_mic_osr_src.clkr,
	[CODEC_I2S_MIC_OSR_CLK] = &codec_i2s_mic_osr_clk.clkr,
	[CODEC_I2S_MIC_DIV_CLK] = &codec_i2s_mic_div_clk.clkr,
	[CODEC_I2S_MIC_BIT_DIV_CLK] = &codec_i2s_mic_bit_div_clk.clkr,
	[CODEC_I2S_MIC_BIT_CLK] = &codec_i2s_mic_bit_clk.clkr,
	[SPARE_I2S_MIC_OSR_SRC] = &spare_i2s_mic_osr_src.clkr,
	[SPARE_I2S_MIC_OSR_CLK] = &spare_i2s_mic_osr_clk.clkr,
	[SPARE_I2S_MIC_DIV_CLK] = &spare_i2s_mic_div_clk.clkr,
	[SPARE_I2S_MIC_BIT_DIV_CLK] = &spare_i2s_mic_bit_div_clk.clkr,
	[SPARE_I2S_MIC_BIT_CLK] = &spare_i2s_mic_bit_clk.clkr,
	[CODEC_I2S_SPKR_OSR_SRC] = &codec_i2s_spkr_osr_src.clkr,
	[CODEC_I2S_SPKR_OSR_CLK] = &codec_i2s_spkr_osr_clk.clkr,
	[CODEC_I2S_SPKR_DIV_CLK] = &codec_i2s_spkr_div_clk.clkr,
	[CODEC_I2S_SPKR_BIT_DIV_CLK] = &codec_i2s_spkr_bit_div_clk.clkr,
	[CODEC_I2S_SPKR_BIT_CLK] = &codec_i2s_spkr_bit_clk.clkr,
	[SPARE_I2S_SPKR_OSR_SRC] = &spare_i2s_spkr_osr_src.clkr,
	[SPARE_I2S_SPKR_OSR_CLK] = &spare_i2s_spkr_osr_clk.clkr,
	[SPARE_I2S_SPKR_DIV_CLK] = &spare_i2s_spkr_div_clk.clkr,
	[SPARE_I2S_SPKR_BIT_DIV_CLK] = &spare_i2s_spkr_bit_div_clk.clkr,
	[SPARE_I2S_SPKR_BIT_CLK] = &spare_i2s_spkr_bit_clk.clkr,
};

static const struct regmap_config lcc_mdm9615_regmap_config = {
	.reg_bits	= 32,
	.reg_stride	= 4,
	.val_bits	= 32,
	.max_register	= 0xfc,
	.fast_io	= true,
};

static const struct qcom_cc_desc lcc_mdm9615_desc = {
	.config = &lcc_mdm9615_regmap_config,
	.clks = lcc_mdm9615_clks,
	.num_clks = ARRAY_SIZE(lcc_mdm9615_clks),
};

static const struct of_device_id lcc_mdm9615_match_table[] = {
	{ .compatible = "qcom,lcc-mdm9615" },
	{ }
};
MODULE_DEVICE_TABLE(of, lcc_mdm9615_match_table);

static int lcc_mdm9615_probe(struct platform_device *pdev)
{
	u32 val;
	struct regmap *regmap;

	regmap = qcom_cc_map(pdev, &lcc_mdm9615_desc);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	/* Use the correct frequency plan depending on speed of PLL4 */
	regmap_read(regmap, 0x4, &val);
	if (val == 0x12) {
		slimbus_src.freq_tbl = clk_tbl_aif_osr_492;
		mi2s_osr_src.freq_tbl = clk_tbl_aif_osr_492;
		codec_i2s_mic_osr_src.freq_tbl = clk_tbl_aif_osr_492;
		spare_i2s_mic_osr_src.freq_tbl = clk_tbl_aif_osr_492;
		codec_i2s_spkr_osr_src.freq_tbl = clk_tbl_aif_osr_492;
		spare_i2s_spkr_osr_src.freq_tbl = clk_tbl_aif_osr_492;
		pcm_src.freq_tbl = clk_tbl_pcm_492;
	}
	/* Enable PLL4 source on the LPASS Primary PLL Mux */
	regmap_write(regmap, 0xc4, 0x1);

	return qcom_cc_really_probe(pdev, &lcc_mdm9615_desc, regmap);
}

static struct platform_driver lcc_mdm9615_driver = {
	.probe		= lcc_mdm9615_probe,
	.driver		= {
		.name	= "lcc-mdm9615",
		.of_match_table = lcc_mdm9615_match_table,
	},
};
module_platform_driver(lcc_mdm9615_driver);

MODULE_DESCRIPTION("QCOM LCC MDM9615 Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:lcc-mdm9615");