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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2022-05-09 20:21:28 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-05-19 18:29:02 +0200
commit295b09128d12fb1a7a67f771cc0ae0df869eafaf (patch)
treebccf68b5b40c0301eeb6ddef4bcf8c720d5f781c /drivers/tty
parent4088ca3edca80c19cd190fba75af7e7a3194adcf (diff)
downloadlinux-295b09128d12fb1a7a67f771cc0ae0df869eafaf.tar.bz2
serial: 8250_dw: Use devm_add_action_or_reset()
Slightly simplify ->probe() and drop a few goto labels by using devm_add_action_or_reset() for clock and reset cleanup. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20220509172129.37770-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_dw.c63
1 files changed, 31 insertions, 32 deletions
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 7934e4658281..e7ef61899576 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -484,6 +484,16 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
}
}
+static void dw8250_clk_disable_unprepare(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static void dw8250_reset_control_assert(void *data)
+{
+ reset_control_assert(data);
+}
+
static int dw8250_probe(struct platform_device *pdev)
{
struct uart_8250_port uart = {}, *up = &uart;
@@ -585,35 +595,43 @@ static int dw8250_probe(struct platform_device *pdev)
if (err)
dev_warn(dev, "could not enable optional baudclk: %d\n", err);
+ err = devm_add_action_or_reset(dev, dw8250_clk_disable_unprepare, data->clk);
+ if (err)
+ return err;
+
if (data->clk)
p->uartclk = clk_get_rate(data->clk);
/* If no clock rate is defined, fail. */
if (!p->uartclk) {
dev_err(dev, "clock rate not defined\n");
- err = -EINVAL;
- goto err_clk;
+ return -EINVAL;
}
data->pclk = devm_clk_get_optional(dev, "apb_pclk");
- if (IS_ERR(data->pclk)) {
- err = PTR_ERR(data->pclk);
- goto err_clk;
- }
+ if (IS_ERR(data->pclk))
+ return PTR_ERR(data->pclk);
err = clk_prepare_enable(data->pclk);
if (err) {
dev_err(dev, "could not enable apb_pclk\n");
- goto err_clk;
+ return err;
}
+ err = devm_add_action_or_reset(dev, dw8250_clk_disable_unprepare, data->pclk);
+ if (err)
+ return err;
+
data->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
- if (IS_ERR(data->rst)) {
- err = PTR_ERR(data->rst);
- goto err_pclk;
- }
+ if (IS_ERR(data->rst))
+ return PTR_ERR(data->rst);
+
reset_control_deassert(data->rst);
+ err = devm_add_action_or_reset(dev, dw8250_reset_control_assert, data->rst);
+ if (err)
+ return err;
+
dw8250_quirks(p, data);
/* If the Busy Functionality is not implemented, don't handle it */
@@ -631,10 +649,8 @@ static int dw8250_probe(struct platform_device *pdev)
}
data->data.line = serial8250_register_8250_port(up);
- if (data->data.line < 0) {
- err = data->data.line;
- goto err_reset;
- }
+ if (data->data.line < 0)
+ return data->data.line;
/*
* Some platforms may provide a reference clock shared between several
@@ -655,17 +671,6 @@ static int dw8250_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
return 0;
-
-err_reset:
- reset_control_assert(data->rst);
-
-err_pclk:
- clk_disable_unprepare(data->pclk);
-
-err_clk:
- clk_disable_unprepare(data->clk);
-
- return err;
}
static int dw8250_remove(struct platform_device *pdev)
@@ -683,12 +688,6 @@ static int dw8250_remove(struct platform_device *pdev)
serial8250_unregister_port(data->data.line);
- reset_control_assert(data->rst);
-
- clk_disable_unprepare(data->pclk);
-
- clk_disable_unprepare(data->clk);
-
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);