linux-kernel - Re: [PATCH v3 13/13] PCI: apple: Add T602x PCIe support

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Message-ID: <3mwdadqtt7733nq2okj47a5rsztgxuip3ukfsy44l7hhh2z7o5@njrv5c5l5fh7>
Date: Sun, 13 Apr 2025 22:54:03 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Marc Zyngier <maz@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, asahi@...ts.linux.dev, 
	Alyssa Rosenzweig <alyssa@...enzweig.io>, Janne Grunau <j@...nau.net>, Hector Martin <marcan@...can.st>, 
	Sven Peter <sven@...npeter.dev>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kw@...ux.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Mark Kettenis <mark.kettenis@...all.nl>
Subject: Re: [PATCH v3 13/13] PCI: apple: Add T602x PCIe support

On Tue, Apr 01, 2025 at 10:17:13AM +0100, Marc Zyngier wrote:
> From: Hector Martin <marcan@...can.st>
> 
> This version of the hardware moved around a bunch of registers, so we
> avoid the old compatible for these and introduce register offset
> structures to handle the differences.
> 
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> Acked-by: Alyssa Rosenzweig <alyssa@...enzweig.io>
> Tested-by: Janne Grunau <j@...nau.net>
> Signed-off-by: Hector Martin <marcan@...can.st>
> Signed-off-by: Alyssa Rosenzweig <alyssa@...enzweig.io>
> Signed-off-by: Marc Zyngier <maz@...nel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
>  drivers/pci/controller/pcie-apple.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
> index 847cba753d28d..5b85d9497070c 100644
> --- a/drivers/pci/controller/pcie-apple.c
> +++ b/drivers/pci/controller/pcie-apple.c
> @@ -124,6 +124,13 @@
>  #define   PORT_TUNSTAT_PERST_ACK_PEND	BIT(1)
>  #define PORT_PREFMEM_ENABLE		0x00994
>  
> +/* T602x (M2-pro and co) */
> +#define PORT_T602X_MSIADDR	0x016c
> +#define PORT_T602X_MSIADDR_HI	0x0170
> +#define PORT_T602X_PERST	0x082c
> +#define PORT_T602X_RID2SID	0x3000
> +#define PORT_T602X_MSIMAP	0x3800
> +
>  #define PORT_MSIMAP_ENABLE	BIT(31)
>  #define PORT_MSIMAP_TARGET	GENMASK(7, 0)
>  
> @@ -158,6 +165,18 @@ static const struct hw_info t8103_hw = {
>  	.max_rid2sid		= 64,
>  };
>  
> +static const struct hw_info t602x_hw = {
> +	.phy_lane_ctl		= 0,
> +	.port_msiaddr		= PORT_T602X_MSIADDR,
> +	.port_msiaddr_hi	= PORT_T602X_MSIADDR_HI,
> +	.port_refclk		= 0,
> +	.port_perst		= PORT_T602X_PERST,
> +	.port_rid2sid		= PORT_T602X_RID2SID,
> +	.port_msimap		= PORT_T602X_MSIMAP,
> +	/* 16 on t602x, guess for autodetect on future HW */
> +	.max_rid2sid		= 512,
> +};
> +
>  struct apple_pcie {
>  	struct mutex		lock;
>  	struct device		*dev;
> @@ -425,6 +444,7 @@ static int apple_pcie_port_setup_irq(struct apple_pcie_port *port)
>  	/* Disable all interrupts */
>  	writel_relaxed(~0, port->base + PORT_INTMSK);
>  	writel_relaxed(~0, port->base + PORT_INTSTAT);
> +	writel_relaxed(~0, port->base + PORT_LINKCMDSTS);
>  
>  	irq_set_chained_handler_and_data(irq, apple_port_irq_handler, port);
>  
> @@ -865,6 +885,7 @@ static int apple_pcie_probe(struct platform_device *pdev)
>  }
>  
>  static const struct of_device_id apple_pcie_of_match[] = {
> +	{ .compatible = "apple,t6020-pcie",	.data = &t602x_hw },
>  	{ .compatible = "apple,pcie",		.data = &t8103_hw },
>  	{ }
>  };
> -- 
> 2.39.2
> 

-- 
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