linux/drivers/clk/clk-twl6040.c

// SPDX-License-Identifier: GPL-2.0-only
/*
* TWL6040 clock module driver for OMAP4 McPDM functional clock
*
* Copyright (C) 2012 Texas Instruments Inc.
* Peter Ujfalusi <[email protected]>
*/

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mfd/twl6040.h>
#include <linux/clk-provider.h>

struct twl6040_pdmclk { … };

static int twl6040_pdmclk_is_prepared(struct clk_hw *hw)
{ … }

static int twl6040_pdmclk_reset_one_clock(struct twl6040_pdmclk *pdmclk,
					  unsigned int reg)
{ … }

/*
 * TWL6040A2 Phoenix Audio IC erratum #6: "PDM Clock Generation Issue At
 * Cold Temperature". This affects cold boot and deeper idle states it
 * seems. The workaround consists of resetting HPPLL and LPPLL.
 */
static int twl6040_pdmclk_quirk_reset_clocks(struct twl6040_pdmclk *pdmclk)
{ … }

static int twl6040_pdmclk_prepare(struct clk_hw *hw)
{ … }

static void twl6040_pdmclk_unprepare(struct clk_hw *hw)
{ … }

static unsigned long twl6040_pdmclk_recalc_rate(struct clk_hw *hw,
						unsigned long parent_rate)
{ … }

static const struct clk_ops twl6040_pdmclk_ops = …;

static const struct clk_init_data twl6040_pdmclk_init = …;

static int twl6040_pdmclk_probe(struct platform_device *pdev)
{ … }

static struct platform_driver twl6040_pdmclk_driver = …;

module_platform_driver(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_ALIAS(…) …;
MODULE_LICENSE(…) …;