spi: spi-cavium-thunderx: 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/20230823133938.1359106-10-lizetao1@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-cavium-thunderx.c

@@ -49,16 +49,12 @@ static int thunderx_spi_probe(struct pci_dev *pdev,
 	p->regs.tx = 0x1010;
 	p->regs.data = 0x1080;
 
-	p->clk = devm_clk_get(dev, NULL);
+	p->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(p->clk)) {
 		ret = PTR_ERR(p->clk);
 		goto error;
 	}
 
-	ret = clk_prepare_enable(p->clk);
-	if (ret)
-		goto error;
-
 	p->sys_freq = clk_get_rate(p->clk);
 	if (!p->sys_freq)
 		p->sys_freq = SYS_FREQ_DEFAULT;
@@ -82,7 +78,6 @@ static int thunderx_spi_probe(struct pci_dev *pdev,
 	return 0;
 
 error:
-	clk_disable_unprepare(p->clk);
 	pci_release_regions(pdev);
 	spi_controller_put(host);
 	return ret;
@@ -97,7 +92,6 @@ static void thunderx_spi_remove(struct pci_dev *pdev)
 	if (!p)
 		return;
 
-	clk_disable_unprepare(p->clk);
 	pci_release_regions(pdev);
 	/* Put everything in a known state. */
 	writeq(0, p->register_base + OCTEON_SPI_CFG(p));