From: Geert Uytterhoeven geert+renesas@glider.be
[ Upstream commit f787216f33ce5b5a2567766398f44ab62157114c ]
The CPG/MSSR Clock Domain driver does not implement the generic_pm_domain.power_{on,off}() callbacks, as the domain itself cannot be powered down. Hence the domain should be marked as always-on by setting the GENPD_FLAG_ALWAYS_ON flag, to prevent the core PM Domain code from considering it for power-off, and doing unnessary processing.
Note that this only affects RZ/A2 SoCs. On R-Car Gen2 and Gen3 SoCs, the R-Car SYSC driver handles Clock Domain creation, and offloads only device attachment/detachment to the CPG/MSSR driver.
Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Reviewed-by: Simon Horman horms+renesas@verge.net.au Reviewed-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/renesas/renesas-cpg-mssr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c index d4075b1306742..132cc96895e3a 100644 --- a/drivers/clk/renesas/renesas-cpg-mssr.c +++ b/drivers/clk/renesas/renesas-cpg-mssr.c @@ -551,7 +551,8 @@ static int __init cpg_mssr_add_clk_domain(struct device *dev,
genpd = &pd->genpd; genpd->name = np->name; - genpd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP; + genpd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ALWAYS_ON | + GENPD_FLAG_ACTIVE_WAKEUP; genpd->attach_dev = cpg_mssr_attach_dev; genpd->detach_dev = cpg_mssr_detach_dev; pm_genpd_init(genpd, &pm_domain_always_on_gov, false);