diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-27 17:18:31 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-27 17:18:31 +0200 |
| commit | 2bfcfd584ff5ccc8bb7acde19b42570414bf880b (patch) | |
| tree | dd473fd33decd6e627e16544e8ba815feb9225d8 /drivers/pmdomain | |
| parent | Merge tag 'vfs-6.10-rc2.fixes' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| parent | pmdomain: imx: gpcv2: Add delay after power up handshake (diff) | |
| download | linux-2bfcfd584ff5ccc8bb7acde19b42570414bf880b.tar.xz linux-2bfcfd584ff5ccc8bb7acde19b42570414bf880b.zip | |
Merge tag 'pmdomain-v6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm
Pull pmdomain fix from Ulf Hansson:
- Fix regression in gpcv2 PM domain for i.MX8
* tag 'pmdomain-v6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm:
pmdomain: imx: gpcv2: Add delay after power up handshake
Diffstat (limited to 'drivers/pmdomain')
| -rw-r--r-- | drivers/pmdomain/imx/gpcv2.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pmdomain/imx/gpcv2.c b/drivers/pmdomain/imx/gpcv2.c index 4b828d74a606..856eaac0ec14 100644 --- a/drivers/pmdomain/imx/gpcv2.c +++ b/drivers/pmdomain/imx/gpcv2.c @@ -393,6 +393,17 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) * automatically there. Just add a delay and suppose the handshake finish * after that. */ + + /* + * For some BLK-CTL module (eg. AudioMix on i.MX8MP) doesn't have BUS + * clk-en bit, it is better to add delay here, as the BLK-CTL module + * doesn't need to care about how it is powered up. + * + * regmap_read_bypassed() is to make sure the above write IO transaction + * already reaches target before udelay() + */ + regmap_read_bypassed(domain->regmap, domain->regs->hsk, ®_val); + udelay(5); } /* Disable reset clocks for all devices in the domain */ |