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From: Rob Herring <robh@kernel.org>
To: Sujeev Dias <sdias@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Arnd Bergmann <arnd@arndb.de>,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	devicetree@vger.kernel.org, Tony Truong <truong@codeaurora.org>,
	Siddartha Mohanadoss <smohanad@codeaurora.org>
Subject: Re: [PATCH v2 6/7] mhi_bus: controller: MHI support for QCOM modems
Date: Wed, 11 Jul 2018 13:36:25 -0600
Message-ID: <20180711193625.GC8659@rob-hp-laptop> (raw)
In-Reply-To: <1531166894-30984-7-git-send-email-sdias@codeaurora.org>

On Mon, Jul 09, 2018 at 01:08:13PM -0700, Sujeev Dias wrote:
> QCOM PCIe based modems uses MHI as the communication protocol.
> MHI control driver is the bus master for such modems. As the bus
> master driver, it oversees power management operations
> such as suspend, resume, powering on and off the device.
> 
> Signed-off-by: Sujeev Dias <sdias@codeaurora.org>
> Reviewed-by: Tony Truong <truong@codeaurora.org>
> Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
> ---
>  Documentation/devicetree/bindings/bus/mhi_qcom.txt |  58 +++

And this one in it's own patch.

>  arch/arm64/configs/defconfig                       |   1 +
>  drivers/bus/Kconfig                                |   1 +
>  drivers/bus/mhi/Makefile                           |   1 +
>  drivers/bus/mhi/controllers/Kconfig                |  13 +
>  drivers/bus/mhi/controllers/Makefile               |   1 +
>  drivers/bus/mhi/controllers/mhi_qcom.c             | 461 +++++++++++++++++++++
>  drivers/bus/mhi/controllers/mhi_qcom.h             |  67 +++
>  8 files changed, 603 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/bus/mhi_qcom.txt
>  create mode 100644 drivers/bus/mhi/controllers/Kconfig
>  create mode 100644 drivers/bus/mhi/controllers/Makefile
>  create mode 100644 drivers/bus/mhi/controllers/mhi_qcom.c
>  create mode 100644 drivers/bus/mhi/controllers/mhi_qcom.h
> 
> diff --git a/Documentation/devicetree/bindings/bus/mhi_qcom.txt b/Documentation/devicetree/bindings/bus/mhi_qcom.txt
> new file mode 100644
> index 0000000..0a48a50
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/mhi_qcom.txt
> @@ -0,0 +1,58 @@
> +Qualcomm Technologies Inc MHI Bus controller
> +
> +MHI control driver enables clients to communicate with external mode
> +using MHI protocol.
> +
> +==============
> +Node Structure
> +==============
> +
> +Main node properties:
> +
> +- reg
> +  Usage: required
> +  Value type: Array (5-cell PCI resource) of <u32>
> +  Definition: First cell is devfn, which is determined by pci bus topology.
> +	Assign the other cells 0 since they are not used.
> +
> +- qcom,smmu-cfg

This should probably be part of the SMMU binding?

> +  Usage: required
> +  Value type: <u32>
> +  Definition: Required SMMU configuration bitmask for PCIe bus.
> +	BIT mask:
> +	BIT(0) : Attach address mapping to endpoint device
> +	BIT(1) : Set attribute S1_BYPASS
> +	BIT(2) : Set attribute FAST
> +	BIT(3) : Set attribute ATOMIC
> +	BIT(4) : Set attribute FORCE_COHERENT
> +
> +- qcom,addr-win
> +  Usage: required if SMMU S1 translation is enabled
> +  Value type: Array of <u64>
> +  Definition: Pair of values describing iova start and stop address
> +
> +- MHI bus settings
> +  Usage: required
> +  Values: as defined by mhi.txt
> +  Definition: Per definition of devicetree/bindings/bus/mhi.txt, define device
> +	specific MHI configuration parameters.
> +
> +========
> +Example:
> +========
> +
> +/* pcie domain (root complex) modem connected to */
> +&pcie1 {
> +	/* pcie bus modem connected to */
> +	pci,bus@1 {
> +		reg = <0 0 0 0 0>;
> +
> +		qcom,mhi {
> +			reg = <0 0 0 0 0>;

2 levels of PCI addresses doesn't look right, but I can't really tell in 
your example. The addresses don't look valid.

> +			qcom,smmu-cfg = <0x3d>;
> +			qcom,addr-win = <0x0 0x20000000 0x0 0x3fffffff>;
> +
> +			<mhi bus configurations>
> +		};
> +	};
> +};

  reply index

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-27  2:23 MHI initial design review Sujeev Dias
2018-04-27  2:23 ` [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface Sujeev Dias
2018-04-27  7:22   ` Greg Kroah-Hartman
2018-04-28 14:28     ` Sujeev Dias
2018-04-28 15:50       ` Greg Kroah-Hartman
2018-04-27  7:23   ` Greg Kroah-Hartman
2018-04-27 12:18   ` Arnd Bergmann
2018-04-28 16:08     ` Sujeev Dias
2018-04-28  0:28   ` kbuild test robot
2018-04-28  2:52   ` kbuild test robot
2018-05-03 19:21   ` Pavel Machek
2018-05-04  3:05     ` Sujeev Dias
2018-06-22 23:03   ` Randy Dunlap
2018-04-27  2:23 ` [PATCH v1 2/4] mhi_bus: controller: MHI support for QCOM modems Sujeev Dias
2018-04-27 11:32   ` Arnd Bergmann
2018-04-28 15:40     ` Sujeev Dias
2018-04-28  3:05   ` kbuild test robot
2018-04-28  3:12   ` kbuild test robot
2018-04-27  2:23 ` [PATCH v1 3/4] mhi_bus: dev: netdev: add network interface driver Sujeev Dias
2018-04-27 11:19   ` Arnd Bergmann
2018-04-28 15:25     ` Sujeev Dias
2018-04-27  2:23 ` [PATCH v1 4/4] mhi_bus: dev: uci: add user space " Sujeev Dias
2018-04-27 11:36   ` Arnd Bergmann
2018-04-28  1:03   ` kbuild test robot
2018-04-28  5:16   ` [PATCH] mhi_bus: dev: uci: fix semicolon.cocci warnings kbuild test robot
2018-04-28  5:16   ` [PATCH v1 4/4] mhi_bus: dev: uci: add user space interface driver kbuild test robot
2018-07-09 20:08 ` MHI code review Sujeev Dias
2018-07-09 20:08   ` [PATCH v2 1/7] mhi_bus: core: initial checkin for modem host interface bus driver Sujeev Dias
2018-07-09 20:50     ` Greg Kroah-Hartman
2018-07-09 20:52     ` Greg Kroah-Hartman
2018-07-10  6:36     ` Greg Kroah-Hartman
2018-07-11 19:30     ` Rob Herring
2018-08-09 18:39     ` Randy Dunlap
2018-07-09 20:08   ` [PATCH v2 2/7] mhi_bus: core: add power management support Sujeev Dias
2018-07-09 20:08   ` [PATCH v2 3/7] mhi_bus: core: add support for data transfer Sujeev Dias
2018-07-10  6:29     ` Greg Kroah-Hartman
2018-07-09 20:08   ` [PATCH v2 4/7] mhi_bus: core: add support for handling ioctl cmds Sujeev Dias
2018-07-09 20:08   ` [PATCH v2 5/7] mhi_bus: core: add support to get external modem time Sujeev Dias
2018-07-11 19:32     ` Rob Herring
2018-08-09 20:17     ` Randy Dunlap
2018-07-09 20:08   ` [PATCH v2 6/7] mhi_bus: controller: MHI support for QCOM modems Sujeev Dias
2018-07-11 19:36     ` Rob Herring [this message]
2018-07-09 20:08   ` [PATCH v2 7/7] mhi_bus: dev: uci: add user space interface driver Sujeev Dias
2019-04-30 15:10   ` MHI code review Daniele Palmas
2019-06-12 17:54     ` Sujeev Dias
2019-06-12 20:58       ` Daniele Palmas
2019-06-12 18:00     ` Sujeev Dias

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