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serial: mxc: Support bulk enabling clocks

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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@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Adam Ford 2025-03-18 18:38:33 -05:00 • committed by Fabio Estevam
parent 8999b76f23
commit dda454e933
2 changed files with 14 additions and 0 deletions
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11
drivers/serial/serial_mxc.c
View file

@ -3,6 +3,7 @@
* (c) 2007 Sascha Hauer <s.hauer@pengutronix.de> * (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>
*/ */
#include <clk.h>
#include <dm.h> #include <dm.h>
#include <errno.h> #include <errno.h>
#include <watchdog.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) static int mxc_serial_probe(struct udevice *dev)
{ {
struct mxc_serial_plat *plat = dev_get_plat(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); _mxc_serial_init(plat->reg, plat->use_dte);
return 0; return 0;

3
include/dm/platform_data/serial_mxc.h
View file

@ -9,6 +9,9 @@
/* Information about a serial port */ /* Information about a serial port */
struct mxc_serial_plat { struct mxc_serial_plat {
struct mxc_uart *reg; /* address of registers in physical memory */ struct mxc_uart *reg; /* address of registers in physical memory */
#if CONFIG_IS_ENABLED(CLK_CCF)
struct clk_bulk clks;
#endif
bool use_dte; bool use_dte;
}; };