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serial: pl01x: Add error value checking

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There also a need to check return values to make sure that clocks were
enabled and setup properly.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Michal Simek 2020-10-13 15:00:24 +02:00
parent a03b594738
commit 6c9662df49
1 changed files with 12 additions and 1 deletions
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13
drivers/serial/serial_pl01x.c
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@ -19,6 +19,7 @@
#include <watchdog.h>
#include <asm/io.h>
#include <serial.h>
#include <dm/device_compat.h>
#include <dm/platform_data/serial_pl01x.h>
#include <linux/compiler.h>
#include "serial_pl01x_internal.h"
@ -362,8 +363,18 @@ int pl01x_serial_ofdata_to_platdata(struct udevice *dev)
plat->clock = dev_read_u32_default(dev, "clock", CONFIG_PL011_CLOCK);
ret = clk_get_by_index(dev, 0, &clk);
if (!ret) {
clk_enable(&clk);
ret = clk_enable(&clk);
if (ret && ret != -ENOSYS) {
dev_err(dev, "failed to enable clock\n");
return ret;
}
plat->clock = clk_get_rate(&clk);
if (IS_ERR_VALUE(plat->clock)) {
dev_err(dev, "failed to get rate\n");
return plat->clock;
}
debug("%s: CLK %d\n", __func__, plat->clock);
}
plat->type = dev_get_driver_data(dev);
plat->skip_init = dev_read_bool(dev, "skip-init");