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ASoC: rsnd: add null CLOCKIN support

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Some Renesas SoC doesn't have full CLOCKIN.
This patch add null_clk, and accepts it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87tumsoe2p.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2021-05-24 15:12:14 +09:00 committed by Mark Brown
parent cf9d5c6619
commit d6956a7dde
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 31 additions and 2 deletions
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33
sound/soc/sh/rcar/adg.c
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@ -3,8 +3,8 @@
// Helper routines for R-Car sound ADG.
//
// Copyright (C) 2013 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include "rsnd.h"
#define CLKA 0
@ -389,6 +389,30 @@ void rsnd_adg_clk_control(struct rsnd_priv *priv, int enable)
}
}
#define NULL_CLK "rsnd_adg_null"
static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv)
{
static struct clk_hw *hw;
struct device *dev = rsnd_priv_to_dev(priv);
if (!hw) {
struct clk_hw *_hw;
int ret;
_hw = clk_hw_register_fixed_rate_with_accuracy(dev, NULL_CLK, NULL, 0, 0, 0);
if (IS_ERR(_hw))
return NULL;
ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, _hw);
if (ret < 0)
clk_hw_unregister_fixed_rate(_hw);
hw = _hw;
}
return clk_hw_get_clk(hw, NULL_CLK);
}
static void rsnd_adg_get_clkin(struct rsnd_priv *priv,
struct rsnd_adg *adg)
{
@ -398,7 +422,12 @@ static void rsnd_adg_get_clkin(struct rsnd_priv *priv,
for (i = 0; i < CLKMAX; i++) {
struct clk *clk = devm_clk_get(dev, clk_name[i]);
adg->clk[i] = IS_ERR(clk) ? NULL : clk;
if (IS_ERR(clk))
clk = rsnd_adg_null_clk_get(priv);
if (IS_ERR(clk))
dev_err(dev, "no adg clock (%s)\n", clk_name[i]);
adg->clk[i] = clk;
}
}