spi: spi-ep93xx: Prepare clock before using it

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

WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:1011 clk_core_enable+0x9c/0xbc
Enabling unprepared ep93xx-spi.0
...
Hardware name: Cirrus Logic EDB9302 Evaluation Board
...
clk_core_enable
clk_core_enable_lock
ep93xx_spi_prepare_hardware
__spi_pump_messages
__spi_sync
spi_sync
spi_sync_transfer.constprop.0
regmap_spi_write
_regmap_raw_write_impl
_regmap_bus_raw_write
_regmap_update_bits
regmap_update_bits_base
cs4271_component_probe
snd_soc_component_probe
soc_probe_component
snd_soc_bind_card
edb93xx_probe
...
spi_master spi0: failed to prepare transfer hardware: -108

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210726140001.24820-3-nikita.shubin@maquefel.me
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index aa676559d2738b3c3c2c130d99cf0c0fe39f712c..5896a7b2fade0ca204ec2d6ddc912176ef4fd007 100644 (file)
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -550,7 +550,7 @@ static int ep93xx_spi_prepare_hardware(struct spi_master *master)
        u32 val;
        int ret;
 
-       ret = clk_enable(espi->clk);
+       ret = clk_prepare_enable(espi->clk);
        if (ret)
                return ret;
 
@@ -570,7 +570,7 @@ static int ep93xx_spi_unprepare_hardware(struct spi_master *master)
        val &= ~SSPCR1_SSE;
        writel(val, espi->mmio + SSPCR1);
 
-       clk_disable(espi->clk);
+       clk_disable_unprepare(espi->clk);
 
        return 0;
 }