diff options
| author | Michal Simek <michal.simek@xilinx.com> | 2016-07-14 14:40:03 +0200 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2016-07-22 14:04:40 +0200 |
| commit | 59da82ef824ec8ef94c362bef79954f02f3345e1 (patch) | |
| tree | 3a43e460f197fa028121c90d341ebca42567ee3b /drivers/serial | |
| parent | f3d1cc2ff387ffe22ccd1bdcb2a998ec46149c6d (diff) | |
serial: zynq: Read information about clock from DT
Read information about clock frequency from DT.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/serial_zynq.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c index 66d54e32ab..4f6e7e442f 100644 --- a/drivers/serial/serial_zynq.c +++ b/drivers/serial/serial_zynq.c @@ -5,6 +5,7 @@ * SPDX-License-Identifier: GPL-2.0+ */ +#include <clk.h> #include <common.h> #include <debug_uart.h> #include <dm.h> @@ -108,8 +109,33 @@ static int _uart_zynq_serial_putc(struct uart_zynq *regs, const char c) int zynq_serial_setbrg(struct udevice *dev, int baudrate) { struct zynq_uart_priv *priv = dev_get_priv(dev); - unsigned long clock = get_uart_clk(0); + unsigned long clock; +#if defined(CONFIG_CLK) || defined(CONFIG_SPL_CLK) + int ret; + struct clk clk; + + 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; + } +#else + clock = get_uart_clk(0); +#endif _uart_zynq_serial_setbrg(priv->regs, clock, baudrate); return 0; |