spi: ath79: Use helper function devm_clk_get_enabled()

Since commit 7ef9651e ("clk: Provide new devm_clk helpers for prepared
and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be
replaced by devm_clk_get_enabled() when driver enables (and possibly
prepares) the clocks for the whole lifetime of the device. Moreover, it is
no longer necessary to unprepare and disable the clocks explicitly.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Link: https://lore.kernel.org/r/20230823133938.1359106-5-lizetao1@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-ath79.c

@@ -200,20 +200,16 @@ static int ath79_spi_probe(struct platform_device *pdev)
 		goto err_put_host;
 	}
 
-	sp->clk = devm_clk_get(&pdev->dev, "ahb");
+	sp->clk = devm_clk_get_enabled(&pdev->dev, "ahb");
 	if (IS_ERR(sp->clk)) {
 		ret = PTR_ERR(sp->clk);
 		goto err_put_host;
 	}
 
-	ret = clk_prepare_enable(sp->clk);
-	if (ret)
-		goto err_put_host;
-
 	rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ);
 	if (!rate) {
 		ret = -EINVAL;
-		goto err_clk_disable;
+		goto err_put_host;
 	}
 
 	sp->rrw_delay = ATH79_SPI_RRW_DELAY_FACTOR / rate;
@@ -229,8 +225,6 @@ static int ath79_spi_probe(struct platform_device *pdev)
 
 err_disable:
 	ath79_spi_disable(sp);
-err_clk_disable:
-	clk_disable_unprepare(sp->clk);
 err_put_host:
 	spi_controller_put(host);
 
@@ -243,7 +237,6 @@ static void ath79_spi_remove(struct platform_device *pdev)
 
 	spi_bitbang_stop(&sp->bitbang);
 	ath79_spi_disable(sp);
-	clk_disable_unprepare(sp->clk);
 	spi_controller_put(sp->bitbang.master);
 }