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[PATCH v4 0/6] remoteproc: Add driver for STMicroelectronics platforms

Started byLee Jones <lee.jones@linaro.org>
First post2015-10-21 14:00 +0200
Last post2015-10-22 00:50 +0200
Articles 4 — 2 participants

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  [PATCH v4 0/6] remoteproc: Add driver for STMicroelectronics platforms Lee Jones <lee.jones@linaro.org> - 2015-10-21 14:00 +0200
    [PATCH v4 4/6] MAINTAINERS: Add ST's Remote Processor Driver to ARM/STI ARCHITECTURE Lee Jones <lee.jones@linaro.org> - 2015-10-21 14:00 +0200
    [PATCH v4 1/6] remoteproc: dt: Provide bindings for ST's Remote Processor Controller driver Lee Jones <lee.jones@linaro.org> - 2015-10-21 14:00 +0200
      Re: [PATCH v4 1/6] remoteproc: dt: Provide bindings for ST's Remote  Processor Controller driver Rob Herring <robh@kernel.org> - 2015-10-22 00:50 +0200

#1252754 — [PATCH v4 0/6] remoteproc: Add driver for STMicroelectronics platforms

FromLee Jones <lee.jones@linaro.org>
Date2015-10-21 14:00 +0200
Subject[PATCH v4 0/6] remoteproc: Add driver for STMicroelectronics platforms
Message-ID<qm042-1Rq-17@gated-at.bofh.it>
ST's platforms often have multiple co-processors (usually ST40s or ST231s)
on-board.  This provides the Linux-side infrastructure to flash and boot
them successfully.

This set has been tested on an STiH410-B2120.

v3 => v4:
 Suggested-by: Suman Anna <s-anna@ti.com>
 - Move to using 'reserved-memory' API
   - New 'reserved-memory' nodes
   - Remove memory locations from RemoteProc's DT node's reg properties
   - Remove C code obtaining/allocating DMA memory
 - Re-order .start() and .stop() ops
 - Add protection around Reset API in error path
 - Explicitly set .has_iommu to false

v2 => v3:
 - Generify syscon property (st,syscfg-boot => st,syscfg)
 - Rename IP in DT bindings doc (Remote Processor => Co-Processor)
 - Remove superfluous 'clock-names' property
 - Remove superfluous 'reg-names' property
 - Populate MAINTAINERS
 - Clean-up DTS formatting
 - Use strings in debugfs to control procs ('1|0' => 'start|stop')
 - Align copyright statement with MODULE() macros
 - Rename driver data structure ('st_rproc' => 'ddata')
 - Addition of a full error path in .start()

v1 => v2:
 - Remove Linux implementation specific comment from binding document
 - Force debugfs '0' to shutdown co-processor - rather than !1
 - Supply more detailed commit message
 - Propagate errors back from .stop()
 - Review GPL wording
 - Supply original author's SoBs

Lee Jones (6):
  remoteproc: dt: Provide bindings for ST's Remote Processor Controller
    driver
  remoteproc: debugfs: Add ability to boot remote processor using
    debugfs
  remoteproc: Supply controller driver for ST's Remote Processors
  MAINTAINERS: Add ST's Remote Processor Driver to ARM/STI ARCHITECTURE
  ARM: STiH407: Add nodes for RemoteProc
  ARM: STiH407: Move over to using the 'reserved-memory' API for
    obtaining DMA memory

 .../devicetree/bindings/remoteproc/st-rproc.txt    |  41 +++
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/stih407-family.dtsi              |  70 +++++
 drivers/remoteproc/Kconfig                         |   9 +
 drivers/remoteproc/Makefile                        |   1 +
 drivers/remoteproc/remoteproc_debugfs.c            |  34 +++
 drivers/remoteproc/st_remoteproc.c                 | 297 +++++++++++++++++++++
 7 files changed, 453 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/st-rproc.txt
 create mode 100644 drivers/remoteproc/st_remoteproc.c

-- 
1.9.1

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#1252759 — [PATCH v4 4/6] MAINTAINERS: Add ST's Remote Processor Driver to ARM/STI ARCHITECTURE

FromLee Jones <lee.jones@linaro.org>
Date2015-10-21 14:00 +0200
Subject[PATCH v4 4/6] MAINTAINERS: Add ST's Remote Processor Driver to ARM/STI ARCHITECTURE
Message-ID<qm0dI-22V-13@gated-at.bofh.it>
In reply to#1252754
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 5f46784..322f5b4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1538,6 +1538,7 @@ F:	drivers/phy/phy-miphy365x.c
 F:	drivers/phy/phy-stih407-usb.c
 F:	drivers/phy/phy-stih41x-usb.c
 F:	drivers/pinctrl/pinctrl-st.c
+F:	drivers/remoteproc/st_remoteproc.c
 F:	drivers/reset/sti/
 F:	drivers/rtc/rtc-st-lpc.c
 F:	drivers/tty/serial/st-asc.c
-- 
1.9.1

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#1252762 — [PATCH v4 1/6] remoteproc: dt: Provide bindings for ST's Remote Processor Controller driver

FromLee Jones <lee.jones@linaro.org>
Date2015-10-21 14:00 +0200
Subject[PATCH v4 1/6] remoteproc: dt: Provide bindings for ST's Remote Processor Controller driver
Message-ID<qm0dI-22V-21@gated-at.bofh.it>
In reply to#1252754
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 .../devicetree/bindings/remoteproc/st-rproc.txt    | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/st-rproc.txt

diff --git a/Documentation/devicetree/bindings/remoteproc/st-rproc.txt b/Documentation/devicetree/bindings/remoteproc/st-rproc.txt
new file mode 100644
index 0000000..1031bcd
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/st-rproc.txt
@@ -0,0 +1,41 @@
+STMicroelectronics Co-Processor Bindings
+----------------------------------------
+
+This binding provides support for adjunct processors found on ST SoCs.
+
+Co-processors can be controlled from the bootloader or the primary OS. If
+the bootloader starts a co-processor, the primary OS must detect its state
+and act accordingly.
+
+Required properties:
+- compatible		Should be one of:
+				"st,st231-rproc"
+				"st,st40-rproc"
+- memory-region		Reserved memory (See: ../reserved-memory/reserved-memory.txt)
+- resets		Reset lines (See: ../reset/reset.txt)
+- reset-names		Must be "sw_reset" and "pwr_reset"
+- clocks		Clock for co-processor (See: ../clock/clock-bindings.txt)
+- clock-frequency	Clock frequency to set co-processor at if the bootloader
+			hasn't already done so
+- st,syscfg		System configuration register which holds the boot vector
+			for the co-processor
+				1st cell: Phandle to syscon block
+				2nd cell: Boot vector register offset
+
+Example:
+
+	audio_reserved: rproc@42000000 {
+		compatible = "shared-dma-pool";
+		reg = <0x42000000 0x01000000>;
+		no-map;
+	};
+
+	st231-audio {
+		compatible	= "st,st231-rproc";
+		memory-region	= <&audio_reserved>;
+		resets		= <&softreset STIH407_ST231_AUD_SOFTRESET>;
+		reset-names	= "sw_reset";
+		clocks		= <&clk_s_c0_flexgen CLK_ST231_AUD_0>;
+		clock-frequency	= <600000000>;
+		st,syscfg	= <&syscfg_core 0x228>;
+	};
-- 
1.9.1

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#1253321 — Re: [PATCH v4 1/6] remoteproc: dt: Provide bindings for ST's Remote Processor Controller driver

FromRob Herring <robh@kernel.org>
Date2015-10-22 00:50 +0200
SubjectRe: [PATCH v4 1/6] remoteproc: dt: Provide bindings for ST's Remote Processor Controller driver
Message-ID<qmamJ-8tQ-5@gated-at.bofh.it>
In reply to#1252762
On Wed, Oct 21, 2015 at 6:47 AM, Lee Jones <lee.jones@linaro.org> wrote:
> Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>

Are all the instances the same or are some fixed to audio processing
for example? If the latter, I think the compatible strings should
reflect the function. If the former, then:

Acked-by: Rob Herring <robh@kernel.org>

Rob

> ---
>  .../devicetree/bindings/remoteproc/st-rproc.txt    | 41 ++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/st-rproc.txt
>
> diff --git a/Documentation/devicetree/bindings/remoteproc/st-rproc.txt b/Documentation/devicetree/bindings/remoteproc/st-rproc.txt
> new file mode 100644
> index 0000000..1031bcd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/st-rproc.txt
> @@ -0,0 +1,41 @@
> +STMicroelectronics Co-Processor Bindings
> +----------------------------------------
> +
> +This binding provides support for adjunct processors found on ST SoCs.
> +
> +Co-processors can be controlled from the bootloader or the primary OS. If
> +the bootloader starts a co-processor, the primary OS must detect its state
> +and act accordingly.
> +
> +Required properties:
> +- compatible           Should be one of:
> +                               "st,st231-rproc"
> +                               "st,st40-rproc"
> +- memory-region                Reserved memory (See: ../reserved-memory/reserved-memory.txt)
> +- resets               Reset lines (See: ../reset/reset.txt)
> +- reset-names          Must be "sw_reset" and "pwr_reset"
> +- clocks               Clock for co-processor (See: ../clock/clock-bindings.txt)
> +- clock-frequency      Clock frequency to set co-processor at if the bootloader
> +                       hasn't already done so
> +- st,syscfg            System configuration register which holds the boot vector
> +                       for the co-processor
> +                               1st cell: Phandle to syscon block
> +                               2nd cell: Boot vector register offset
> +
> +Example:
> +
> +       audio_reserved: rproc@42000000 {
> +               compatible = "shared-dma-pool";
> +               reg = <0x42000000 0x01000000>;
> +               no-map;
> +       };
> +
> +       st231-audio {
> +               compatible      = "st,st231-rproc";
> +               memory-region   = <&audio_reserved>;
> +               resets          = <&softreset STIH407_ST231_AUD_SOFTRESET>;
> +               reset-names     = "sw_reset";
> +               clocks          = <&clk_s_c0_flexgen CLK_ST231_AUD_0>;
> +               clock-frequency = <600000000>;
> +               st,syscfg       = <&syscfg_core 0x228>;
> +       };
> --
> 1.9.1
>
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