From: Hector Martin <marcan@marcan.st>
Date: Wed, 17 Nov 2021 14:19:16 +0000 (+0900)
Subject: PCI: apple: Enable clock gating
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=754bb7ad29566b2789cafb6b378b788266d1f131;p=linux.git

PCI: apple: Enable clock gating

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

Link: https://lore.kernel.org/r/20211117141916.197192-1-marcan@marcan.st
Tested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
---

diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
index 1bf4d75b61be7..fa5e9c31d80b9 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;