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| author | Tony Lindgren <tony@atomide.com> | 2019-05-27 04:51:56 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2019-05-28 05:19:16 -0700 |
| commit | 8383e25994efadbd76cf6db7b19776cb8931e5da (patch) | |
| tree | 9cc46e9226b3b1f816bcce8ea9897534f9c23c74 /drivers/bus | |
| parent | 6e09f497eb911c61fc8dde04ce8482fc2615355e (diff) | |
| download | linux-8383e25994efadbd76cf6db7b19776cb8931e5da.tar.gz linux-8383e25994efadbd76cf6db7b19776cb8931e5da.tar.bz2 linux-8383e25994efadbd76cf6db7b19776cb8931e5da.zip | |
bus: ti-sysc: Add support for disabling module without legacy mode
We must not assert reset for modules with no child device drivers
until in runtime_suspend. Otherwise register access will fail without
legacy mode helping us.
Let's add a flag for disable_on_idle and move the reset driver
handling to runtime suspend and resume. We can then also use the
disable_on_idle flag to reconfigure sysconfig register for PM
modes requesting it.
Let's also make the other flags use bitfield while at it instead of
bool.
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/ti-sysc.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index 38573f9b4fdc..f36f3e8b38f3 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -89,9 +89,10 @@ struct sysc { struct ti_sysc_cookie cookie; const char *name; u32 revision; - bool enabled; - bool needs_resume; - bool child_needs_resume; + unsigned int enabled:1; + unsigned int needs_resume:1; + unsigned int child_needs_resume:1; + unsigned int disable_on_idle:1; struct delayed_work idle_work; }; @@ -1021,6 +1022,9 @@ static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev, dev_err(dev, "%s: could not idle: %i\n", __func__, error); + if (ddata->disable_on_idle) + reset_control_assert(ddata->rsts); + return 0; } @@ -1030,6 +1034,9 @@ static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev, struct ti_sysc_platform_data *pdata; int error; + if (ddata->disable_on_idle) + reset_control_deassert(ddata->rsts); + pdata = dev_get_platdata(ddata->dev); if (!pdata) return 0; @@ -1077,6 +1084,9 @@ static int __maybe_unused sysc_runtime_suspend(struct device *dev) err_allow_idle: sysc_clkdm_allow_idle(ddata); + if (ddata->disable_on_idle) + reset_control_assert(ddata->rsts); + return error; } @@ -1090,6 +1100,9 @@ static int __maybe_unused sysc_runtime_resume(struct device *dev) if (ddata->enabled) return 0; + if (ddata->disable_on_idle) + reset_control_deassert(ddata->rsts); + sysc_clkdm_deny_idle(ddata); if (sysc_opt_clks_needed(ddata)) { @@ -2306,7 +2319,7 @@ static int sysc_probe(struct platform_device *pdev) } if (!of_get_available_child_count(ddata->dev->of_node)) - reset_control_assert(ddata->rsts); + ddata->disable_on_idle = true; return 0; |