From: Marc Zyngier <maz@kernel.org>
To: Hector Martin <marcan@marcan.st>
Cc: "Alyssa Rosenzweig" <alyssa@rosenzweig.io>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PCI: apple: Fix REFCLK1 enable/poll logic
Date: Wed, 17 Nov 2021 17:56:12 +0000 [thread overview]
Message-ID: <87v90q7jk3.wl-maz@kernel.org> (raw)
In-Reply-To: <20211117140044.193865-1-marcan@marcan.st>
On Wed, 17 Nov 2021 14:00:44 +0000,
Hector Martin <marcan@marcan.st> wrote:
>
> REFCLK1 has req/ack bits just like REFCLK0
>
> Signed-off-by: Hector Martin <marcan@marcan.st>
> ---
> drivers/pci/controller/pcie-apple.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
> index b665d29af77a..420c291a5c68 100644
> --- a/drivers/pci/controller/pcie-apple.c
> +++ b/drivers/pci/controller/pcie-apple.c
> @@ -42,8 +42,9 @@
> #define CORE_FABRIC_STAT_MASK 0x001F001F
> #define CORE_LANE_CFG(port) (0x84000 + 0x4000 * (port))
> #define CORE_LANE_CFG_REFCLK0REQ BIT(0)
> -#define CORE_LANE_CFG_REFCLK1 BIT(1)
> +#define CORE_LANE_CFG_REFCLK1REQ BIT(1)
> #define CORE_LANE_CFG_REFCLK0ACK BIT(2)
> +#define CORE_LANE_CFG_REFCLK1ACK BIT(3)
> #define CORE_LANE_CFG_REFCLKEN (BIT(9) | BIT(10))
> #define CORE_LANE_CTL(port) (0x84004 + 0x4000 * (port))
> #define CORE_LANE_CTL_CFGACC BIT(15)
> @@ -481,9 +482,9 @@ static int apple_pcie_setup_refclk(struct apple_pcie *pcie,
> if (res < 0)
> return res;
>
> - rmw_set(CORE_LANE_CFG_REFCLK1, pcie->base + CORE_LANE_CFG(port->idx));
> + rmw_set(CORE_LANE_CFG_REFCLK1REQ, pcie->base + CORE_LANE_CFG(port->idx));
> res = readl_relaxed_poll_timeout(pcie->base + CORE_LANE_CFG(port->idx),
> - stat, stat & CORE_LANE_CFG_REFCLK1,
> + stat, stat & CORE_LANE_CFG_REFCLK1ACK,
> 100, 50000);
>
> if (res < 0)
> --
> 2.33.0
>
>
Fixes: 1e33888fbe44 ("PCI: apple: Add initial hardware bring-up")
Acked-by: Marc Zyngier <maz@kernel.org>
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2021-11-17 17:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-17 14:00 [PATCH] PCI: apple: Fix REFCLK1 enable/poll logic Hector Martin
2021-11-17 17:56 ` Marc Zyngier [this message]
2021-11-30 16:49 ` Lorenzo Pieralisi
2021-11-30 17:26 ` Hector Martin
2021-12-06 10:45 ` Lorenzo Pieralisi
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