[PATCH -next v2 19/25] spi: mtk-snfi: Use helper function devm_clk_get_enabled()

Li Zetao
2023-08-23T13:43:00Z

Also, devm_clk_get_optional() and clk_prepare_enable() can now be
replaced by devm_clk_get_optional_enabled().Moreover, the two functions
mtk_snand_enable_clk() and mtk_snand_disable_clk() no longer are used,
drop them for clean code.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Li Zetao <lizetao1@huawei.com>
---
v1 -> v2: None

drivers/spi/spi-mtk-snfi.c | 61 ++++++--------------------------------
1 file changed, 9 insertions(+), 52 deletions(-)

diff --git a/drivers/spi/spi-mtk-snfi.c b/drivers/spi/spi-mtk-snfi.c
index 4433a8a9299f..8ad5a4764855 100644
--- a/drivers/spi/spi-mtk-snfi.c
+++ b/drivers/spi/spi-mtk-snfi.c
@@ -1332,42 +1332,6 @@ static const struct of_device_id mtk_snand_ids[] = {

MODULE_DEVICE_TABLE(of, mtk_snand_ids);

-static int mtk_snand_enable_clk(struct mtk_snand *ms)
-{
- int ret;
-
- ret = clk_prepare_enable(ms->nfi_clk);
- if (ret) {
- dev_err(ms->dev, "unable to enable nfi clk\n");
- return ret;
- }
- ret = clk_prepare_enable(ms->pad_clk);
- if (ret) {
- dev_err(ms->dev, "unable to enable pad clk\n");
- goto err1;
- }
- ret = clk_prepare_enable(ms->nfi_hclk);
- if (ret) {
- dev_err(ms->dev, "unable to enable nfi hclk\n");
- goto err2;
- }
-
- return 0;
-
-err2:
- clk_disable_unprepare(ms->pad_clk);
-err1:
- clk_disable_unprepare(ms->nfi_clk);
- return ret;
-}
-
-static void mtk_snand_disable_clk(struct mtk_snand *ms)
-{
- clk_disable_unprepare(ms->nfi_hclk);
- clk_disable_unprepare(ms->pad_clk);
- clk_disable_unprepare(ms->nfi_clk);
-}
-
static int mtk_snand_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -1406,49 +1370,45 @@ static int mtk_snand_probe(struct platform_device *pdev)

ms->dev = &pdev->dev;

- ms->nfi_clk = devm_clk_get(&pdev->dev, "nfi_clk");
+ ms->nfi_clk = devm_clk_get_enabled(&pdev->dev, "nfi_clk");
if (IS_ERR(ms->nfi_clk)) {
ret = PTR_ERR(ms->nfi_clk);
dev_err(&pdev->dev, "unable to get nfi_clk, err = %d\n", ret);
goto release_ecc;
}

- ms->pad_clk = devm_clk_get(&pdev->dev, "pad_clk");
+ ms->pad_clk = devm_clk_get_enabled(&pdev->dev, "pad_clk");
if (IS_ERR(ms->pad_clk)) {
ret = PTR_ERR(ms->pad_clk);
dev_err(&pdev->dev, "unable to get pad_clk, err = %d\n", ret);
goto release_ecc;
}

- ms->nfi_hclk = devm_clk_get_optional(&pdev->dev, "nfi_hclk");
+ ms->nfi_hclk = devm_clk_get_optional_enabled(&pdev->dev, "nfi_hclk");
if (IS_ERR(ms->nfi_hclk)) {
ret = PTR_ERR(ms->nfi_hclk);
dev_err(&pdev->dev, "unable to get nfi_hclk, err = %d\n", ret);
goto release_ecc;
}

- ret = mtk_snand_enable_clk(ms);
- if (ret)
- goto release_ecc;
-
init_completion(&ms->op_done);

ms->irq = platform_get_irq(pdev, 0);
if (ms->irq < 0) {
ret = ms->irq;
- goto disable_clk;
+ goto release_ecc;
}
ret = devm_request_irq(ms->dev, ms->irq, mtk_snand_irq, 0x0,
"mtk-snand", ms);
if (ret) {
dev_err(ms->dev, "failed to request snfi irq\n");
- goto disable_clk;
+ goto release_ecc;
}

ret = dma_set_mask(ms->dev, DMA_BIT_MASK(32));
if (ret) {
dev_err(ms->dev, "failed to set dma mask\n");
- goto disable_clk;
+ goto release_ecc;
}

// switch to SNFI mode
@@ -1472,7 +1432,7 @@ static int mtk_snand_probe(struct platform_device *pdev)
ret = mtk_snand_setup_pagefmt(ms, SZ_2K, SZ_64);
if (ret) {
dev_err(ms->dev, "failed to set initial page format\n");
- goto disable_clk;
+ goto release_ecc;
}

// setup ECC engine
@@ -1484,7 +1444,7 @@ static int mtk_snand_probe(struct platform_device *pdev)
ret = nand_ecc_register_on_host_hw_engine(&ms->ecc_eng);
if (ret) {
dev_err(&pdev->dev, "failed to register ecc engine.\n");
- goto disable_clk;
+ goto release_ecc;
}

ctlr->num_chipselect = 1;
@@ -1496,12 +1456,10 @@ static int mtk_snand_probe(struct platform_device *pdev)
ret = spi_register_controller(ctlr);
if (ret) {
dev_err(&pdev->dev, "spi_register_controller failed.\n");
- goto disable_clk;
+ goto release_ecc;
}

return 0;
-disable_clk:
- mtk_snand_disable_clk(ms);
release_ecc:
mtk_ecc_release(ms->ecc);
return ret;
@@ -1513,7 +1471,6 @@ static void mtk_snand_remove(struct platform_device *pdev)
struct mtk_snand *ms = spi_controller_get_devdata(ctlr);

spi_unregister_controller(ctlr);
- mtk_snand_disable_clk(ms);
mtk_ecc_release(ms->ecc);
kfree(ms->buf);