diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2021-12-16 15:17:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-17 17:57:15 +0100 |
| commit | 8a1dcae95c2ea4cb5d499833ad3c9a28f248ba7c (patch) | |
| tree | a3a5d6d305f3b0f47fca4a4abf762553a70edd91 | |
| parent | 0d1bc829a755de826582c1c48ec40601d9b2fc29 (diff) | |
| download | linux-8a1dcae95c2ea4cb5d499833ad3c9a28f248ba7c.tar.bz2 | |
serial: sh-sci: Use devm_clk_get_optional()
The sh-sci driver supports up to four input clocks, of which only the
first one is mandatory.
Replace devm_clk_get() and custom error checking by
devm_clk_get_optional(), to simplify the code and to catch all real
errors.
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/bce27288cb570952dd96b441e1af8768ad8b4870.1639663832.git.geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 9b4afbb3f67c..c9073ba3b8da 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2779,11 +2779,11 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev) clk_names[SCI_SCK] = "hsck"; for (i = 0; i < SCI_NUM_CLKS; i++) { - clk = devm_clk_get(dev, clk_names[i]); - if (PTR_ERR(clk) == -EPROBE_DEFER) - return -EPROBE_DEFER; + clk = devm_clk_get_optional(dev, clk_names[i]); + if (IS_ERR(clk)) + return PTR_ERR(clk); - if (IS_ERR(clk) && i == SCI_FCK) { + if (!clk && i == SCI_FCK) { /* * Not all SH platforms declare a clock lookup entry * for SCI devices, in which case we need to get the @@ -2796,13 +2796,12 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev) clk_names[i]); } - if (IS_ERR(clk)) - dev_dbg(dev, "failed to get %s (%ld)\n", clk_names[i], - PTR_ERR(clk)); + if (!clk) + dev_dbg(dev, "failed to get %s\n", clk_names[i]); else dev_dbg(dev, "clk %s is %pC rate %lu\n", clk_names[i], clk, clk_get_rate(clk)); - sci_port->clks[i] = IS_ERR(clk) ? NULL : clk; + sci_port->clks[i] = clk; } return 0; } |