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From: Kishon Vijay Abraham I <kishon@ti.com>
To: Rob Herring <robh@kernel.org>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Murali Karicheri <m-karicheri2@ti.com>,
	Jesper Nilsson <jesper.nilsson@axis.com>,
	<linux-pci@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-arm-kernel@axis.com>
Subject: Re: [PATCH 09/24] dt-bindings: PCI: Document "atu" reg-names
Date: Wed, 23 Jan 2019 15:34:28 +0530	[thread overview]
Message-ID: <5f2fa7cd-b5a3-e466-6cbc-305f15836241@ti.com> (raw)
In-Reply-To: <20190122004806.GA32204@bogus>

Hi Rob,

On 22/01/19 6:18 AM, Rob Herring wrote:
> On Mon, Jan 14, 2019 at 06:54:09PM +0530, Kishon Vijay Abraham I wrote:
>> Document "atu" reg-names required to get the register space for ATU in
>> Synopsys designware core version >= 4.80.
>>
>> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
>> ---
>>  Documentation/devicetree/bindings/pci/designware-pcie.txt | 7 +++++--
>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt
>> index c124f9bc11f3..5561a1c060d0 100644
>> --- a/Documentation/devicetree/bindings/pci/designware-pcie.txt
>> +++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt
>> @@ -4,8 +4,11 @@ Required properties:
>>  - compatible:
>>  	"snps,dw-pcie" for RC mode;
>>  	"snps,dw-pcie-ep" for EP mode;
>> -- reg: Should contain the configuration address space.
>> -- reg-names: Must be "config" for the PCIe configuration space.
>> +- reg: For designware cores version < 4.80 contains the configuration
>> +       address space. For designware core version >= 4.80, contains
>> +       the configuration and ATU address space
>> +- reg-names: Must be "config" for the PCIe configuration space and "atu" for
>> +	     the ATU address space.
> 
> I'm pretty sure we already have other platforms with an ATU. Those all 
> just represent it with the other ctrl registers? So maybe this is TI 
> specific that it is separate. Or should have some conditional like 'if 
> the ATU space is separate, the reg-name should be atu'.

This is specific to Synopsys Designware version >= 4.80 and not to TI. The
first platform used a fixed offset to get the atu_base which is incorrect.

In the "reg" binding I've noted this dependency.

Thanks
Kishon

  reply	other threads:[~2019-01-23 10:05 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-14 13:24 [PATCH 00/24] Add support for PCIe RC and EP mode in TI's AM654 SoC Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 01/24] PCI: keystone: Add start_link/stop_link dw_pcie_ops Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 02/24] PCI: keystone: Cleanup error_irq configuration Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 03/24] dt-bindings: PCI: keystone: Add "reg-names" binding information Kishon Vijay Abraham I
2019-01-22  0:31   ` Rob Herring
2019-01-14 13:24 ` [PATCH 04/24] PCI: keystone: Perform host initialization in a single function Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 05/24] PCI: keystone: Use platform_get_resource_byname to get memory resources Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 06/24] PCI: keystone: Move initializations to appropriate places Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 07/24] dt-bindings: PCI: Add dt-binding to configure PCIe mode Kishon Vijay Abraham I
2019-01-22  0:32   ` Rob Herring
2019-01-14 13:24 ` [PATCH 08/24] PCI: keystone: Explicitly set the " Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 09/24] dt-bindings: PCI: Document "atu" reg-names Kishon Vijay Abraham I
2019-01-22  0:48   ` Rob Herring
2019-01-23 10:04     ` Kishon Vijay Abraham I [this message]
2019-01-14 13:24 ` [PATCH 10/24] PCI: dwc: Enable iATU unroll for endpoint too Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 11/24] PCI: dwc: Fix ATU identification for designware version >= 4.80 Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 12/24] PCI: keystone: Prevent ARM32 specific code to be compiled for ARM64 Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 13/24] dt-bindings: PCI: Add PCI RC dt binding documentation for AM654 Kishon Vijay Abraham I
2019-01-22  0:48   ` Rob Herring
2019-01-14 13:24 ` [PATCH 14/24] PCI: keystone: Add support for PCIe RC in AM654x Platforms Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 15/24] PCI: keystone: Invoke phy_reset API before enabling PHY Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 16/24] PCI: endpoint: Add support to allocate aligned buffers to be mapped in BARs Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 17/24] PCI: dwc: Add const qualifier to struct dw_pcie_ep_ops Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 18/24] PCI: dwc: Fix dw_pcie_ep_find_capability to return correct capability offset Kishon Vijay Abraham I
2019-01-29  9:25   ` Gustavo Pimentel
2019-01-29 10:19     ` Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 19/24] PCI: dwc: Add callbacks for accessing dbi2 address space Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 20/24] PCI: keystone: Add support for PCIe EP in AM654x Platforms Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 21/24] PCI: designware-ep: Configure RESBAR to advertise the smallest size Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 22/24] PCI: designware-ep: Use aligned ATU window for raising MSI interrupts Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 23/24] misc: pci_endpoint_test: Add support to test PCI EP in AM654x Kishon Vijay Abraham I
2019-01-14 13:24 ` [PATCH 24/24] misc: pci_endpoint_test: Fix test_reg_bar to be updated in pci_endpoint_test Kishon Vijay Abraham I
2019-02-04 16:40 ` [PATCH 00/24] Add support for PCIe RC and EP mode in TI's AM654 SoC Lorenzo Pieralisi
2019-02-06 12:50   ` Kishon Vijay Abraham I

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