From:   Hector Martin <marcan@marcan.st>
To:     Marc Zyngier <maz@kernel.org>,
        Alyssa Rosenzweig <alyssa@rosenzweig.io>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Rob Herring <robh@kernel.org>,
        =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= <kw@linux.com>,
        Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org,
        linux-kernel@vger.kernel.org, Hector Martin <marcan@marcan.st>
Subject: [PATCH] PCI: apple: Enable clock gating
Date:   Wed, 17 Nov 2021 23:19:16 +0900
Message-Id: <20211117141916.197192-1-marcan@marcan.st>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

These pokes are not required to make the PCIe port work, but it sounds
like this should save some power at least.

Signed-off-by: Hector Martin <marcan@marcan.st>
---
 drivers/pci/controller/pcie-apple.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
index 420c291a5c68..03bfe977c579 100644
--- a/drivers/pci/controller/pcie-apple.c
+++ b/drivers/pci/controller/pcie-apple.c
@@ -553,6 +553,9 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
 		return ret;
 	}
 
+	rmw_clear(PORT_REFCLK_CGDIS, port->base + PORT_REFCLK);
+	rmw_clear(PORT_APPCLK_CGDIS, port->base + PORT_APPCLK);
+
 	ret = apple_pcie_port_setup_irq(port);
 	if (ret)
 		return ret;
-- 
2.33.0