From: Siva Durga Prasad Paladugu siva.durga.paladugu@xilinx.com
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 ---
drivers/serial/serial_pl01x.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 2a5f256184f2..f4f33b13ff33 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -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");