diff options
author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2022-05-09 20:21:28 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-19 18:29:02 +0200 |
commit | 295b09128d12fb1a7a67f771cc0ae0df869eafaf (patch) | |
tree | bccf68b5b40c0301eeb6ddef4bcf8c720d5f781c /drivers/tty/serial | |
parent | 4088ca3edca80c19cd190fba75af7e7a3194adcf (diff) | |
download | linux-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/serial')
-rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 63 |
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); |