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[109.252.192.57]) by smtp.gmail.com with ESMTPSA id u5sm655596lff.78.2020.12.17.10.07.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Dec 2020 10:07:52 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Mark Brown , Liam Girdwood , Ulf Hansson , Mauro Carvalho Chehab , Rob Herring , Peter Geis , Nicolas Chauvet , Krzysztof Kozlowski , "Rafael J. Wysocki" , Kevin Hilman , Peter De Schrijver , Viresh Kumar , Stephen Boyd , Michael Turquette Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, linux-clk@vger.kernel.org Subject: [PATCH v2 29/48] soc/tegra: pmc: Link domains to the parent Core domain Date: Thu, 17 Dec 2020 21:06:19 +0300 Message-Id: <20201217180638.22748-30-digetx@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201217180638.22748-1-digetx@gmail.com> References: <20201217180638.22748-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The Core domain is a parent of PMC power domains, hence PMC domains should be set up as a sub-domains of the parent (Core) domain if "power-domains" phandle presents in a device-tree node of PMC domain. This allows to propagate GENPD performance changes to the parent Core domain if performance change is applied to PMC domain. Signed-off-by: Dmitry Osipenko --- drivers/soc/tegra/pmc.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index 4f96dc7745c4..1a659d1c06d7 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -1236,6 +1236,7 @@ static int tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np) static int tegra_powergate_init(struct tegra_pmc *pmc, struct device_node *parent) { + struct of_phandle_args child_args, parent_args; struct device_node *np, *child; int err = 0; @@ -1249,6 +1250,24 @@ static int tegra_powergate_init(struct tegra_pmc *pmc, of_node_put(child); break; } + + if (of_parse_phandle_with_args(child, "power-domains", + "#power-domain-cells", + 0, &parent_args)) + continue; + + child_args.np = child; + child_args.args_count = 0; + + err = of_genpd_add_subdomain(&parent_args, &child_args); + of_node_put(parent_args.np); + if (err) { + if (err == -ENOENT) + err = -EPROBE_DEFER; + + of_node_put(child); + break; + } } of_node_put(np);