leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

serial: pl01x: Get clock from clock node if no clock property found

Browse Source 
This patch gets clock from clock nodes if no clock property found
in serial node.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu
2018-01-22 17:49:37 +05:30
committed by Michal Simek
parent 03c4ee223b
commit 8f1c740d09
1 changed files with 26 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/serial/serial_pl01x.c
View File

@@ -10,6 +10,7 @@
/* Simple U-Boot driver for the PrimeCell PL010/PL011 UARTs */
#include <clk.h>
#include <common.h>
#include <dm.h>
#include <errno.h>
@@ -341,6 +342,9 @@ int pl01x_serial_ofdata_to_platdata(struct udevice *dev)
{
struct pl01x_serial_platdata *plat = dev_get_platdata(dev);
fdt_addr_t addr;
unsigned long clock;
int ret;
struct clk clk;
addr = devfdt_get_addr(dev);
if (addr == FDT_ADDR_T_NONE)
@@ -348,6 +352,28 @@ int pl01x_serial_ofdata_to_platdata(struct udevice *dev)
plat->base = addr;
plat->clock = dev_read_u32_default(dev, "clock", 1);
if (plat->clock == 1) {
ret = clk_get_by_index(dev, 0, &clk);
if (ret < 0) {
dev_err(dev, "failed to get clock\n");
return ret;
}
clock = clk_get_rate(&clk);
if (IS_ERR_VALUE(clock)) {
dev_err(dev, "failed to get rate\n");
return clock;
}
debug("%s: CLK %ld\n", __func__, clock);
ret = clk_enable(&clk);
if (ret && ret != -ENOSYS) {
dev_err(dev, "failed to enable clock\n");
return ret;
}
plat->clock = clock;
}
plat->type = dev_get_driver_data(dev);
plat->skip_init = dev_read_bool(dev, "skip-init");