linux/sound/soc/fsl/fsl_utils.c

// SPDX-License-Identifier: GPL-2.0
//
// Freescale ALSA SoC Machine driver utility
//
// Author: Timur Tabi <[email protected]>
//
// Copyright 2010 Freescale Semiconductor, Inc.

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <sound/soc.h>

#include "fsl_utils.h"

/**
 * fsl_asoc_get_dma_channel - determine the dma channel for a SSI node
 *
 * @ssi_np: pointer to the SSI device tree node
 * @name: name of the phandle pointing to the dma channel
 * @dai: ASoC DAI link pointer to be filled with platform_name
 * @dma_channel_id: dma channel id to be returned
 * @dma_id: dma id to be returned
 *
 * This function determines the dma and channel id for given SSI node.  It
 * also discovers the platform_name for the ASoC DAI link.
 */
int fsl_asoc_get_dma_channel(struct device_node *ssi_np,
			     const char *name,
			     struct snd_soc_dai_link *dai,
			     unsigned int *dma_channel_id,
			     unsigned int *dma_id)
{ … }
EXPORT_SYMBOL(…);

/**
 * fsl_asoc_get_pll_clocks - get two PLL clock source
 *
 * @dev: device pointer
 * @pll8k_clk: PLL clock pointer for 8kHz
 * @pll11k_clk: PLL clock pointer for 11kHz
 *
 * This function get two PLL clock source
 */
void fsl_asoc_get_pll_clocks(struct device *dev, struct clk **pll8k_clk,
			     struct clk **pll11k_clk)
{ … }
EXPORT_SYMBOL(…);

/**
 * fsl_asoc_reparent_pll_clocks - set clock parent if necessary
 *
 * @dev: device pointer
 * @clk: root clock pointer
 * @pll8k_clk: PLL clock pointer for 8kHz
 * @pll11k_clk: PLL clock pointer for 11kHz
 * @ratio: target requency for root clock
 *
 * This function set root clock parent according to the target ratio
 */
void fsl_asoc_reparent_pll_clocks(struct device *dev, struct clk *clk,
				  struct clk *pll8k_clk,
				  struct clk *pll11k_clk, u64 ratio)
{ … }
EXPORT_SYMBOL(…);

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