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stm32mp: syscon: manage clock when present in device tree

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Enable the clocks during syscon probe when they are present in device tree.

This patch avoids a freeze when the SYSCFG clock is not enabled by
TF-A / OP-TEE.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-06-29 12:04:23 +02:00
parent 3105836c9e
commit 7c55249307
1 changed files with 14 additions and 0 deletions
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14
arch/arm/mach-stm32mp/syscon.c
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@ -4,6 +4,7 @@
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <syscon.h>
#include <asm/arch/stm32.h>
@ -14,9 +15,22 @@ static const struct udevice_id stm32mp_syscon_ids[] = {
{ }
};
static int stm32mp_syscon_probe(struct udevice *dev)
{
struct clk_bulk clk_bulk;
int ret;
ret = clk_get_bulk(dev, &clk_bulk);
if (!ret)
clk_enable_bulk(&clk_bulk);
return 0;
}
U_BOOT_DRIVER(syscon_stm32mp) = {
.name = "stmp32mp_syscon",
.id = UCLASS_SYSCON,
.of_match = stm32mp_syscon_ids,
.bind = dm_scan_fdt_dev,
.probe = stm32mp_syscon_probe,
};