From: Andreas Kemnade <andreas@kemnade.info>
To: t-kristo@ti.com, mturquette@baylibre.com, sboyd@kernel.org,
linux-omap@vger.kernel.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org, bcousson@baylibre.com,
paul@pwsan.com, tony@atomide.com, letux-kernel@openphoenux.org
Cc: Andreas Kemnade <andreas@kemnade.info>
Subject: [PATCH v2 3/3] arm: omap_hwmod disable ick autoidling when a hwmod requires that
Date: Sat, 10 Nov 2018 21:31:15 +0100 [thread overview]
Message-ID: <20181110203115.13335-4-andreas@kemnade.info> (raw)
In-Reply-To: <20181110203115.13335-1-andreas@kemnade.info>
Deny autoidle for hwmods with the OCPIF_SWSUP_IDLE flag,
that makes hwmods working properly which cannot handle
autoidle properly in lower power states.
Affected is e. g. the omap_hdq.
Since an ick might have mulitple users, autoidle is disabled
when an individual user requires that rather than in
_setup_iclk_autoidle. dss_ick is an example for that.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
Comments to v1 to this patch were worked into a new 2/3
---
arch/arm/mach-omap2/omap_hwmod.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 083dcd9942ce..3a86ba414973 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1002,8 +1002,10 @@ static int _enable_clocks(struct omap_hwmod *oh)
clk_enable(oh->_clk);
list_for_each_entry(os, &oh->slave_ports, node) {
- if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
+ if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE)) {
+ omap2_clk_deny_idle(os->_clk);
clk_enable(os->_clk);
+ }
}
/* The opt clocks are controlled by the device driver. */
@@ -1055,8 +1057,10 @@ static int _disable_clocks(struct omap_hwmod *oh)
clk_disable(oh->_clk);
list_for_each_entry(os, &oh->slave_ports, node) {
- if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
+ if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE)) {
clk_disable(os->_clk);
+ omap2_clk_allow_idle(os->_clk);
+ }
}
if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
@@ -2425,9 +2429,13 @@ static void __init _setup_iclk_autoidle(struct omap_hwmod *oh)
continue;
if (os->flags & OCPIF_SWSUP_IDLE) {
- /* XXX omap_iclk_deny_idle(c); */
+ /*
+ * we might have multiple users of one iclk with
+ * different requirements, disable autoidle when
+ * the module is enabled, e.g. dss iclk
+ */
} else {
- /* XXX omap_iclk_allow_idle(c); */
+ /* we are enabling autoidle afterwards anyways */
clk_enable(os->_clk);
}
}
--
2.11.0
next prev parent reply other threads:[~2018-11-10 20:31 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-10 20:31 [PATCH v2 0/3] mach-omap2: handle autoidle denial Andreas Kemnade
2018-11-10 20:31 ` [PATCH v2 1/3] clk: ti: add a usecount for autoidle Andreas Kemnade
2018-11-10 20:31 ` [PATCH v2 2/3] clk: ti: check clock type before doing autoidle ops Andreas Kemnade
2018-11-30 0:25 ` Stephen Boyd
2018-11-30 6:15 ` Andreas Kemnade
2018-11-30 7:20 ` Stephen Boyd
2018-11-30 7:35 ` Tero Kristo
2018-11-30 7:57 ` Stephen Boyd
2018-11-30 9:20 ` Tero Kristo
2018-11-30 12:17 ` Andreas Kemnade
2018-11-30 15:37 ` Tony Lindgren
2018-11-30 23:51 ` Stephen Boyd
2018-12-03 15:39 ` Tony Lindgren
2018-12-03 16:22 ` Andreas Kemnade
2018-12-04 16:45 ` Tony Lindgren
2018-12-27 20:12 ` Andreas Kemnade
2018-12-28 20:02 ` Tony Lindgren
2018-12-31 7:23 ` Tero Kristo
2018-12-31 8:30 ` Andreas Kemnade
2019-01-03 23:39 ` Stephen Boyd
2019-01-04 7:28 ` Tero Kristo
2019-01-11 22:49 ` Stephen Boyd
2019-01-14 8:25 ` Tero Kristo
2018-12-03 17:06 ` Stephen Boyd
2018-11-10 20:31 ` Andreas Kemnade [this message]
2018-11-30 0:26 ` [PATCH v2 0/3] mach-omap2: handle autoidle denial Stephen Boyd
2018-11-30 7:37 ` Tero Kristo
2018-11-30 7:57 ` Stephen Boyd
2018-11-30 9:21 ` Tero Kristo
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