linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: linux-kernel@vger.kernel.org
Cc: matthias.bgg@gmail.com, drinkcat@chromium.org,
	hsinyi@chromium.org, Collabora Kernel ML <kernel@collabora.com>,
	fparent@baylibre.com, weiyi.lu@mediatek.com,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH v3 15/16] soc: mediatek: pm-domains: Add default power off flag
Date: Mon, 26 Oct 2020 18:55:24 +0100	[thread overview]
Message-ID: <20201026175526.2915399-16-enric.balletbo@collabora.com> (raw)
In-Reply-To: <20201026175526.2915399-1-enric.balletbo@collabora.com>

From: Weiyi Lu <weiyi.lu@mediatek.com>

For some power domain, like conn on MT8192, it should be default OFF.
Because the power on/off control relies the function of connectivity chip
and its firmware. And if project choose other chip vendor solution,
those necessary connectivity functions will not provided.

Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---

Changes in v3: None
Changes in v2: None

 drivers/soc/mediatek/mtk-pm-domains.c | 23 +++++++++++++++++------
 drivers/soc/mediatek/mtk-pm-domains.h |  1 +
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c
index 63993076a544..fe0e955076a0 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.c
+++ b/drivers/soc/mediatek/mtk-pm-domains.c
@@ -378,10 +378,16 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
 	 * software.  The unused domains will be switched off during
 	 * late_init time.
 	 */
-	ret = scpsys_power_on(&pd->genpd);
-	if (ret < 0) {
-		dev_err(scpsys->dev, "%pOF: failed to power on domain: %d\n", node, ret);
-		goto err_unprepare_clocks;
+	if (MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF)) {
+		if (scpsys_domain_is_on(pd))
+			dev_warn(scpsys->dev,
+				 "%pOF: A default off power domain has been ON\n", node);
+	} else {
+		ret = scpsys_power_on(&pd->genpd);
+		if (ret < 0) {
+			dev_err(scpsys->dev, "%pOF: failed to power on domain: %d\n", node, ret);
+			goto err_unprepare_clocks;
+		}
 	}
 
 	if (scpsys->domains[id]) {
@@ -395,7 +401,11 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
 	pd->genpd.power_off = scpsys_power_off;
 	pd->genpd.power_on = scpsys_power_on;
 
-	pm_genpd_init(&pd->genpd, NULL, false);
+	if (MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF))
+		pm_genpd_init(&pd->genpd, NULL, true);
+	else
+		pm_genpd_init(&pd->genpd, NULL, false);
+
 	scpsys->domains[id] = &pd->genpd;
 
 	return scpsys->pd_data.domains[id];
@@ -478,7 +488,8 @@ static void scpsys_remove_one_domain(struct scpsys_domain *pd)
 			"failed to remove domain '%s' : %d - state may be inconsistent\n",
 			pd->genpd.name, ret);
 
-	scpsys_power_off(&pd->genpd);
+	if (!MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF))
+		scpsys_power_off(&pd->genpd);
 
 	clk_bulk_unprepare(pd->num_clks, pd->clks);
 	clk_bulk_put(pd->num_clks, pd->clks);
diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h
index 2ad213be84a5..0fa6a938b40c 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.h
+++ b/drivers/soc/mediatek/mtk-pm-domains.h
@@ -6,6 +6,7 @@
 #define MTK_SCPD_ACTIVE_WAKEUP		BIT(0)
 #define MTK_SCPD_FWAIT_SRAM		BIT(1)
 #define MTK_SCPD_SRAM_ISO		BIT(2)
+#define MTK_SCPD_KEEP_DEFAULT_OFF	BIT(3)
 #define MTK_SCPD_CAPS(_scpd, _x)	((_scpd)->data->caps & (_x))
 
 #define SPM_VDE_PWR_CON			0x0210
-- 
2.28.0


  parent reply	other threads:[~2020-10-26 17:55 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26 17:55 [PATCH v3 00/16] soc: mediatek: pm-domains: Add new driver for SCPSYS power domains controller Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 01/16] dt-bindings: power: Add bindings for the Mediatek " Enric Balletbo i Serra
2020-10-28 13:55   ` Rob Herring
2020-10-28 13:57   ` Rob Herring
2020-10-26 17:55 ` [PATCH v3 02/16] soc: mediatek: Add MediaTek SCPSYS power domains Enric Balletbo i Serra
2020-10-27  0:55   ` Nicolas Boichat
2020-10-30 10:54     ` Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 03/16] arm64: dts: mediatek: Add mt8173 power domain controller Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 04/16] soc: mediatek: pm-domains: Add bus protection protocol Enric Balletbo i Serra
2020-10-27  0:58   ` Nicolas Boichat
2020-10-27 11:07   ` Weiyi Lu
2020-10-30 10:55     ` Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 05/16] soc: mediatek: pm_domains: Make bus protection generic Enric Balletbo i Serra
2020-10-27  2:41   ` Nicolas Boichat
2020-10-27 12:57   ` Fabien Parent
2020-10-29 14:49     ` Matthias Brugger
2020-10-26 17:55 ` [PATCH v3 06/16] soc: mediatek: pm-domains: Add SMI block as bus protection block Enric Balletbo i Serra
2020-10-27  2:44   ` Nicolas Boichat
2020-10-30 10:56     ` Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 07/16] soc: mediatek: pm-domains: Add extra sram control Enric Balletbo i Serra
2020-10-27  2:47   ` Nicolas Boichat
2020-10-26 17:55 ` [PATCH v3 08/16] soc: mediatek: pm-domains: Add subsystem clocks Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 09/16] soc: mediatek: pm-domains: Allow bus protection to ignore clear ack Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 10/16] dt-bindings: power: Add MT8183 power domains Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 11/16] soc: mediatek: pm-domains: Add support for mt8183 Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 12/16] arm64: dts: mediatek: Add smi_common node for MT8183 Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 13/16] arm64: dts: mediatek: Add mt8183 power domains controller Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 14/16] dt-bindings: power: Add MT8192 power domains Enric Balletbo i Serra
2020-10-26 17:55 ` Enric Balletbo i Serra [this message]
2020-10-27 10:53   ` [PATCH v3 15/16] soc: mediatek: pm-domains: Add default power off flag Matthias Brugger
2020-10-27 11:18     ` Weiyi Lu
2020-10-29 14:51       ` Matthias Brugger
2020-10-30 11:17         ` Enric Balletbo i Serra
2020-10-26 17:55 ` [PATCH v3 16/16] soc: mediatek: pm-domains: Add support for mt8192 Enric Balletbo i Serra

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201026175526.2915399-16-enric.balletbo@collabora.com \
    --to=enric.balletbo@collabora.com \
    --cc=drinkcat@chromium.org \
    --cc=fparent@baylibre.com \
    --cc=hsinyi@chromium.org \
    --cc=kernel@collabora.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=matthias.bgg@gmail.com \
    --cc=weiyi.lu@mediatek.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).