[PATCH V2 05/10] serial: mxc: Support bulk enabling clocks

[Adam Ford]

Depending on the platform, there may be multiple clock sources
required to enable a UART.  Use the bulk functions to get and
enable the clocks when the UART probes.  This can facilitate
the removal of functions to manually enable the clock.

This is made dependent on CLK_CCF which is used on imx6q,
imx8m[mnqp], several imxrt, imx9.  If/when the UART clock
registration is done for older boards, this limitation
could be updated.

Signed-off-by: Adam Ford <aford173 at gmail.com>
---
 drivers/serial/serial_mxc.c           | 11 +++++++++++
 include/dm/platform_data/serial_mxc.h |  1 +
 2 files changed, 12 insertions(+)
 
 V2:  Fix build issue when built without CLK_CCF

diff --git a/drivers/serial/serial_mxc.c b/drivers/serial/serial_mxc.c
index c5fd740be4d..28f4435d01d 100644
--- a/drivers/serial/serial_mxc.c
+++ b/drivers/serial/serial_mxc.c
@@ -3,6 +3,7 @@
  * (c) 2007 Sascha Hauer <s.hauer at pengutronix.de>
  */
 
+#include <clk.h>
 #include <dm.h>
 #include <errno.h>
 #include <watchdog.h>
@@ -312,7 +313,17 @@ int mxc_serial_setbrg(struct udevice *dev, int baudrate)
 static int mxc_serial_probe(struct udevice *dev)
 {
 	struct mxc_serial_plat *plat = dev_get_plat(dev);
+#if CONFIG_IS_ENABLED(CLK_CCF)
+	int ret;
 
+	ret = clk_get_bulk(dev, &plat->clks);
+	if (ret)
+		return ret;
+
+	ret = clk_enable_bulk(&plat->clks);
+	if (ret)
+		return ret;
+#endif
 	_mxc_serial_init(plat->reg, plat->use_dte);
 
 	return 0;
diff --git a/include/dm/platform_data/serial_mxc.h b/include/dm/platform_data/serial_mxc.h
index cc59eeb1dd1..6f607b987ef 100644
--- a/include/dm/platform_data/serial_mxc.h
+++ b/include/dm/platform_data/serial_mxc.h
@@ -9,6 +9,7 @@
 /* Information about a serial port */
 struct mxc_serial_plat {
 	struct mxc_uart *reg;  /* address of registers in physical memory */
+	struct clk_bulk clks;
 	bool use_dte;
 };
 
-- 
2.45.2