[PATCH 6/7] ASoC: cirrus: i2s: Prepare clock before using it

[Alexander Sverdlin]

Use clk_prepare_enable()/clk_disable_unprepare() in preparation for switch
to Common Clock Framework, otherwise the following is visible:

WARNING: CPU: 0 PID: 97 at drivers/clk/clk.c:1011 clk_core_enable+0x9c/0xbc
Enabling unprepared mclk
CPU: 0 PID: 97 Comm: OPAL-Event:97 Not tainted 5.13.0-rc5-tekon #1
Hardware name: Cirrus Logic EDB9302 Evaluation Board
[<c000d5b0>] (unwind_backtrace) from [<c000c590>] (show_stack+0x10/0x18)
[<c000c590>] (show_stack) from [<c03a5fd8>] (dump_stack+0x20/0x2c)
[<c03a5fd8>] (dump_stack) from [<c03a2138>] (__warn+0x98/0xc0)
[<c03a2138>] (__warn) from [<c03a21f0>] (warn_slowpath_fmt+0x90/0xc0)
[<c03a21f0>] (warn_slowpath_fmt) from [<c01d8358>] (clk_core_enable+0x9c/0xbc)
[<c01d8358>] (clk_core_enable) from [<c01d8698>] (clk_core_enable_lock+0x18/0x30)
[<c01d8698>] (clk_core_enable_lock) from [<c0291568>] (ep93xx_i2s_hw_params+0x1a0/0x1c0)
[<c0291568>] (ep93xx_i2s_hw_params) from [<c0287488>] (snd_soc_dai_hw_params+0x54/0xb4)
[<c0287488>] (snd_soc_dai_hw_params) from [<c028b0a4>] (soc_pcm_hw_params+0x418/0x5bc)
[<c028b0a4>] (soc_pcm_hw_params) from [<c0275608>] (snd_pcm_hw_params+0x14c/0x448)
[<c0275608>] (snd_pcm_hw_params) from [<c02761ac>] (snd_pcm_ioctl+0x258/0x1114)
[<c02761ac>] (snd_pcm_ioctl) from [<c00e6d40>] (sys_ioctl+0x290/0xbc4)
[<c00e6d40>] (sys_ioctl) from [<c0008200>] (ret_fast_syscall+0x0/0x4c)

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
---
 sound/soc/cirrus/ep93xx-i2s.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/sound/soc/cirrus/ep93xx-i2s.c b/sound/soc/cirrus/ep93xx-i2s.c
index 0d26550d0df8..4d3179f03202 100644
--- a/sound/soc/cirrus/ep93xx-i2s.c
+++ b/sound/soc/cirrus/ep93xx-i2s.c
@@ -111,9 +111,9 @@ static void ep93xx_i2s_enable(struct ep93xx_i2s_info *info, int stream)
 	if ((ep93xx_i2s_read_reg(info, EP93XX_I2S_TX0EN) & 0x1) == 0 &&
 	    (ep93xx_i2s_read_reg(info, EP93XX_I2S_RX0EN) & 0x1) == 0) {
 		/* Enable clocks */
-		clk_enable(info->mclk);
-		clk_enable(info->sclk);
-		clk_enable(info->lrclk);
+		clk_prepare_enable(info->mclk);
+		clk_prepare_enable(info->sclk);
+		clk_prepare_enable(info->lrclk);
 
 		/* Enable i2s */
 		ep93xx_i2s_write_reg(info, EP93XX_I2S_GLCTRL, 1);
@@ -156,9 +156,9 @@ static void ep93xx_i2s_disable(struct ep93xx_i2s_info *info, int stream)
 		ep93xx_i2s_write_reg(info, EP93XX_I2S_GLCTRL, 0);
 
 		/* Disable clocks */
-		clk_disable(info->lrclk);
-		clk_disable(info->sclk);
-		clk_disable(info->mclk);
+		clk_disable_unprepare(info->lrclk);
+		clk_disable_unprepare(info->sclk);
+		clk_disable_unprepare(info->mclk);
 	}
 }
 
-- 
2.32.0