linux-kernel - Re: [PATCH v4 12/12] PCI: brcmstb: Enable 7712 SOCs

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Message-ID: <20240725045928.GL2317@thinkpad>
Date: Thu, 25 Jul 2024 10:29:28 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Jim Quinlan <james.quinlan@...adcom.com>
Cc: linux-pci@...r.kernel.org, Nicolas Saenz Julienne <nsaenz@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Cyril Brulebois <kibi@...ian.org>,
	Stanimir Varbanov <svarbanov@...e.de>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	bcm-kernel-feedback-list@...adcom.com, jim2101024@...il.com,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" <linux-rpi-kernel@...ts.infradead.org>,
	"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" <linux-arm-kernel@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 12/12] PCI: brcmstb: Enable 7712 SOCs

On Tue, Jul 16, 2024 at 05:31:27PM -0400, Jim Quinlan wrote:
> The Broadcom STB 7712 is the sibling chip of the RPi 5 (2712).
> 

Could you please add more info about this SoC? What PCIe Gen it supports, lanes,
IP revision etc...

- Mani

> Signed-off-by: Jim Quinlan <james.quinlan@...adcom.com>
> Reviewed-by: Stanimir Varbanov <svarbanov@...e.de>
> Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
> Tested-by: Florian Fainelli <florian.fainelli@...adcom.com>
> ---
>  drivers/pci/controller/pcie-brcmstb.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
> index fa5616a56383..7debb3599789 100644
> --- a/drivers/pci/controller/pcie-brcmstb.c
> +++ b/drivers/pci/controller/pcie-brcmstb.c
> @@ -1193,6 +1193,10 @@ static void brcm_extend_rbus_timeout(struct brcm_pcie *pcie)
>  	const unsigned int REG_OFFSET = PCIE_RGR1_SW_INIT_1(pcie) - 8;
>  	u32 timeout_us = 4000000; /* 4 seconds, our setting for L1SS */
>  
> +	/* 7712 does not have this (RGR1) timer */
> +	if (pcie->model == BCM7712)
> +		return;
> +
>  	/* Each unit in timeout register is 1/216,000,000 seconds */
>  	writel(216 * timeout_us, pcie->base + REG_OFFSET);
>  }
> @@ -1664,6 +1668,13 @@ static const int pcie_offsets_bmips_7425[] = {
>  	[PCIE_INTR2_CPU_BASE] = 0x4300,
>  };
>  
> +static const int pcie_offset_bcm7712[] = {
> +	[EXT_CFG_INDEX]  = 0x9000,
> +	[EXT_CFG_DATA]   = 0x9004,
> +	[PCIE_HARD_DEBUG] = 0x4304,
> +	[PCIE_INTR2_CPU_BASE] = 0x4400,
> +};
> +
>  static const struct pcie_cfg_data generic_cfg = {
>  	.offsets	= pcie_offsets,
>  	.model		= GENERIC,
> @@ -1729,6 +1740,14 @@ static const struct pcie_cfg_data bcm7216_cfg = {
>  	.num_inbound	= 3,
>  };
>  
> +static const struct pcie_cfg_data bcm7712_cfg = {
> +	.offsets	= pcie_offset_bcm7712,
> +	.perst_set	= brcm_pcie_perst_set_7278,
> +	.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic,
> +	.model		= BCM7712,
> +	.num_inbound	= 10,
> +};
> +
>  static const struct of_device_id brcm_pcie_match[] = {
>  	{ .compatible = "brcm,bcm2711-pcie", .data = &bcm2711_cfg },
>  	{ .compatible = "brcm,bcm4908-pcie", .data = &bcm4908_cfg },
> @@ -1738,6 +1757,7 @@ static const struct of_device_id brcm_pcie_match[] = {
>  	{ .compatible = "brcm,bcm7445-pcie", .data = &generic_cfg },
>  	{ .compatible = "brcm,bcm7435-pcie", .data = &bcm7435_cfg },
>  	{ .compatible = "brcm,bcm7425-pcie", .data = &bcm7425_cfg },
> +	{ .compatible = "brcm,bcm7712-pcie", .data = &bcm7712_cfg },
>  	{},
>  };
>  
> -- 
> 2.17.1
> 



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