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| author | Olof Johansson <olof@lixom.net> | 2018-07-21 15:05:16 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2018-07-21 15:05:16 -0700 |
| commit | 1df88c683ea376a0499e195c2301eb8ce9668b77 (patch) | |
| tree | c81ce36eaaedde699d09bb748bf5cb17e30c867c /drivers | |
| parent | 85a03fe92ce654d32442a59807fde2cd9fe177b0 (diff) | |
| parent | 69c04aee3482415cff52061a3ccad4943662e81d (diff) | |
| download | linux-stable-1df88c683ea376a0499e195c2301eb8ce9668b77.tar.gz linux-stable-1df88c683ea376a0499e195c2301eb8ce9668b77.tar.bz2 linux-stable-1df88c683ea376a0499e195c2301eb8ce9668b77.zip | |
Merge tag 'imx-drivers-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/drivers
i.MX drivers update for 4.19:
- Handle i.MX6SL chip errata ERR006287 in the safest possible way by
keeping the DISP domain always-on, because Upon resuming from power
gating, the modules in the display power domain (eLCDIF, EPDC, PXP
and SPDC) might fail to perform register reads correctly.
- Use GENPD_FLAG_ALWAYS_ON flag for i.MX6QP PU ERR009619 handling.
It is functionally identical to the exsiting implementation but
simpler and slightly faster.
* tag 'imx-drivers-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
soc: imx6qp: Use GENPD_FLAG_ALWAYS_ON for PU errata
soc: imx: gpc: Disable 6sl display power gating for ERR006287
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/soc/imx/gpc.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/soc/imx/gpc.c b/drivers/soc/imx/gpc.c index 32f0748fd067..403f3f2f43bd 100644 --- a/drivers/soc/imx/gpc.c +++ b/drivers/soc/imx/gpc.c @@ -47,7 +47,6 @@ struct imx_pm_domain { unsigned int reg_offs; signed char cntr_pdn_bit; unsigned int ipg_rate_mhz; - unsigned int flags; }; static inline struct imx_pm_domain * @@ -62,9 +61,6 @@ static int imx6_pm_domain_power_off(struct generic_pm_domain *genpd) int iso, iso2sw; u32 val; - if (pd->flags & PGC_DOMAIN_FLAG_NO_PD) - return -EBUSY; - /* Read ISO and ISO2SW power down delays */ regmap_read(pd->regmap, pd->reg_offs + GPC_PGC_PUPSCR_OFFS, &val); iso = val & 0x3f; @@ -288,26 +284,31 @@ static struct imx_pm_domain imx_gpc_domains[] = { struct imx_gpc_dt_data { int num_domains; bool err009619_present; + bool err006287_present; }; static const struct imx_gpc_dt_data imx6q_dt_data = { .num_domains = 2, .err009619_present = false, + .err006287_present = false, }; static const struct imx_gpc_dt_data imx6qp_dt_data = { .num_domains = 2, .err009619_present = true, + .err006287_present = false, }; static const struct imx_gpc_dt_data imx6sl_dt_data = { .num_domains = 3, .err009619_present = false, + .err006287_present = true, }; static const struct imx_gpc_dt_data imx6sx_dt_data = { .num_domains = 4, .err009619_present = false, + .err006287_present = false, }; static const struct of_device_id imx_gpc_dt_ids[] = { @@ -413,8 +414,13 @@ static int imx_gpc_probe(struct platform_device *pdev) /* Disable PU power down in normal operation if ERR009619 is present */ if (of_id_data->err009619_present) - imx_gpc_domains[GPC_PGC_DOMAIN_PU].flags |= - PGC_DOMAIN_FLAG_NO_PD; + imx_gpc_domains[GPC_PGC_DOMAIN_PU].base.flags |= + GENPD_FLAG_ALWAYS_ON; + + /* Keep DISP always on if ERR006287 is present */ + if (of_id_data->err006287_present) + imx_gpc_domains[GPC_PGC_DOMAIN_DISPLAY].base.flags |= + GENPD_FLAG_ALWAYS_ON; if (!pgc_node) { ret = imx_gpc_old_dt_init(&pdev->dev, regmap, |