diff options
| author | Tony Lindgren <tony@atomide.com> | 2020-05-31 22:37:54 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2020-06-03 20:12:19 +0300 |
| commit | 08b91dd6e547467fad61a7c201ff71080d7ad65a (patch) | |
| tree | 6e72953e92803dcc9563b5b3c517ba3f319ffe0e /drivers/bus | |
| parent | d46f9fbec71997420e4fb83c04d9affdf423f879 (diff) | |
| download | linux-08b91dd6e547467fad61a7c201ff71080d7ad65a.tar.xz | |
bus: ti-sysc: Ignore clockactivity unless specified as a quirk
We must ignore the clockactivity bit for most modules and not set it
unless specified for the module with SYSC_QUIRK_USE_CLOCKACT. Otherwise
the interface clock can be automatically gated constantly causing
unexpected performance issues.
Fixes: ae9ae12e9daa ("bus: ti-sysc: Handle clockactivity for enable and disable")
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/ti-sysc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index a3a2c269e9ad..4f640a635ded 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -988,10 +988,13 @@ static int sysc_enable_module(struct device *dev) regbits = ddata->cap->regbits; reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); - /* Set CLOCKACTIVITY, we only use it for ick */ + /* + * Set CLOCKACTIVITY, we only use it for ick. And we only configure it + * based on the SYSC_QUIRK_USE_CLOCKACT flag, not based on the hardware + * capabilities. See the old HWMOD_SET_DEFAULT_CLOCKACT flag. + */ if (regbits->clkact_shift >= 0 && - (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT || - ddata->cfg.sysc_val & BIT(regbits->clkact_shift))) + (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT)) reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift; /* Set SIDLE mode */ |