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power: pmic: mtk-pwrap: add init capability flag

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Add a PWRAP_CAP_INIT capability flag to specify if it is safe to call
pwrap_init() or not. Not all targets define the registers accessed
by pwrap_init(). In that case, it is expected that an earlier bootloader
has already initialized the PMIC. If not, we now return an error instead
of trying to access undefined registers.

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260409-mtk-pmic-fixes-v2-3-73e83aa6345b@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>
This commit is contained in:
David Lechner
2026-04-09 15:30:35 -05:00
parent 3996c20956
commit 8c5f5ef2c9
1 changed files with 8 additions and 1 deletions
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9
drivers/power/pmic/mtk-pwrap.c
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@@ -63,6 +63,8 @@ static const struct pmic_child_info mt6359_pmic_children_info[] = {
#define PWRAP_CAP_WDT_SRC BIT(4)
#define PWRAP_CAP_WDT_SRC1 BIT(5)
#define PWRAP_CAP_ARB BIT(6)
/* To implement this capability, the registers used in pwrap_init() must be defined. */
#define PWRAP_CAP_INIT BIT(7)
/* defines for slave device wrapper registers */
enum dew_regs {
@@ -735,6 +737,11 @@ static int mtk_pwrap_probe(struct udevice *dev)
* Skip initialization here in this case.
*/
if (!pwrap_readl(wrp, PWRAP_INIT_DONE2)) {
if (!HAS_CAP(wrp->master->caps, PWRAP_CAP_INIT)) {
dev_err(dev, "initialization is required but not supported\n");
return -EOPNOTSUPP;
}
ret = pwrap_init(wrp);
if (ret) {
dev_err(dev, "init failed with %d\n", ret);
@@ -877,7 +884,7 @@ static const struct pmic_wrapper_type pwrap_mt8365 = {
.int1_en_all = 0x0,
.spi_w = PWRAP_MAN_CMD_SPI_WRITE,
.wdt_src = PWRAP_WDT_SRC_MASK_ALL,
.caps = PWRAP_CAP_INT1_EN | PWRAP_CAP_WDT_SRC1,
.caps = PWRAP_CAP_INT1_EN | PWRAP_CAP_WDT_SRC1 | PWRAP_CAP_INIT,
};
static const struct udevice_id mtk_pwrap_ids[] = {