From 74ad752442d9488cf02ee2a9243d6c6b5c943efb Mon Sep 17 00:00:00 2001 From: Tom Lendacky Date: Tue, 24 Feb 2015 10:47:49 -0600 Subject: amd-xgbe-phy: PHY KX/KR mode differences The PHY requires different settings for the Decision Feedback Analyzer (DFE) when running in KX mode vs. KR mode. Update the code to change these settings when changing modes in order to provide a more stable link. Additionally, adjust the 10GbE PQ skew default setting to a more sane value. Signed-off-by: Tom Lendacky Signed-off-by: David S. Miller --- Documentation/devicetree/bindings/net/amd-xgbe-phy.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt b/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt index 33df3932168e..8db32384a486 100644 --- a/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt +++ b/Documentation/devicetree/bindings/net/amd-xgbe-phy.txt @@ -27,6 +27,8 @@ property is used. - amd,serdes-cdr-rate: CDR rate speed selection - amd,serdes-pq-skew: PQ (data sampling) skew - amd,serdes-tx-amp: TX amplitude boost +- amd,serdes-dfe-tap-config: DFE taps available to run +- amd,serdes-dfe-tap-enable: DFE taps to enable Example: xgbe_phy@e1240800 { @@ -41,4 +43,6 @@ Example: amd,serdes-cdr-rate = <2>, <2>, <7>; amd,serdes-pq-skew = <10>, <10>, <30>; amd,serdes-tx-amp = <15>, <15>, <10>; + amd,serdes-dfe-tap-config = <3>, <3>, <1>; + amd,serdes-dfe-tap-enable = <0>, <0>, <127>; }; -- cgit v1.2.3 From 737eb0301f296d55c22350c6968ff1ef51bacb5f Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Fri, 20 Feb 2015 14:53:46 +0000 Subject: genirq / PM: better describe IRQF_NO_SUSPEND semantics The IRQF_NO_SUSPEND flag is intended to be used for interrupts required to be enabled during the suspend-resume cycle. This mostly consists of IPIs and timer interrupts, potentially including chained irqchip interrupts if these are necessary to handle timers or IPIs. If an interrupt does not fall into one of the aforementioned categories, requesting it with IRQF_NO_SUSPEND is likely incorrect. Using IRQF_NO_SUSPEND does not guarantee that the interrupt can wake the system from a suspended state. For an interrupt to be able to trigger a wakeup, it may be necessary to program various components of the system. In these cases it is necessary to use {enable,disabled}_irq_wake. Unfortunately, several drivers assume that IRQF_NO_SUSPEND ensures that an IRQ can wake up the system, and the documentation can be read ambiguously w.r.t. this property. This patch updates the documentation regarding IRQF_NO_SUSPEND to make this caveat explicit, hopefully making future misuse rarer. Cleanup of existing misuse will occur as part of later patch series. Signed-off-by: Mark Rutland Acked-by: Peter Zijlstra (Intel) Signed-off-by: Rafael J. Wysocki --- Documentation/power/suspend-and-interrupts.txt | 6 ++++-- include/linux/interrupt.h | 4 +++- 2 files changed, 7 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/power/suspend-and-interrupts.txt b/Documentation/power/suspend-and-interrupts.txt index 2f9c5a5fcb25..50493c9284b4 100644 --- a/Documentation/power/suspend-and-interrupts.txt +++ b/Documentation/power/suspend-and-interrupts.txt @@ -40,8 +40,10 @@ but also to IPIs and to some other special-purpose interrupts. The IRQF_NO_SUSPEND flag is used to indicate that to the IRQ subsystem when requesting a special-purpose interrupt. It causes suspend_device_irqs() to -leave the corresponding IRQ enabled so as to allow the interrupt to work all -the time as expected. +leave the corresponding IRQ enabled so as to allow the interrupt to work as +expected during the suspend-resume cycle, but does not guarantee that the +interrupt will wake the system from a suspended state -- for such cases it is +necessary to use enable_irq_wake(). Note that the IRQF_NO_SUSPEND flag affects the entire IRQ and not just one user of it. Thus, if the IRQ is shared, all of the interrupt handlers installed diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index d9b05b5bf8c7..606771c7cac2 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -52,7 +52,9 @@ * IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished. * Used by threaded interrupts which need to keep the * irq line disabled until the threaded handler has been run. - * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend + * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend. Does not guarantee + * that this interrupt will wake the system from a suspended + * state. See Documentation/power/suspend-and-interrupts.txt * IRQF_FORCE_RESUME - Force enable it on resume even if IRQF_NO_SUSPEND is set * IRQF_NO_THREAD - Interrupt cannot be threaded * IRQF_EARLY_RESUME - Resume IRQ early during syscore instead of at device -- cgit v1.2.3 From dbe675433df3966cb4d24e80670a3134ab8757ee Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Wed, 4 Feb 2015 23:44:15 +0900 Subject: dt-bindings: document a note about power domain subdomains This patch adds a note on defining subdomains to generic PM domain binding documentation to let power domain providers use common approach for defining power domain hierarchy. Signed-off-by: Marek Szyprowski Acked-by: Geert Uytterhoeven Reviewed-by: Ulf Hansson Signed-off-by: Kukjin Kim --- .../devicetree/bindings/power/power_domain.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 98c16672ab5f..0f8ed3710c66 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -19,6 +19,16 @@ Required properties: providing multiple PM domains (e.g. power controllers), but can be any value as specified by device tree binding documentation of particular provider. +Optional properties: + - power-domains : A phandle and PM domain specifier as defined by bindings of + the power controller specified by phandle. + Some power domains might be powered from another power domain (or have + other hardware specific dependencies). For representing such dependency + a standard PM domain consumer binding is used. When provided, all domains + created by the given provider should be subdomains of the domain + specified by this binding. More details about power domain specifier are + available in the next section. + Example: power: power-controller@12340000 { @@ -30,6 +40,25 @@ Example: The node above defines a power controller that is a PM domain provider and expects one cell as its phandle argument. +Example 2: + + parent: power-controller@12340000 { + compatible = "foo,power-controller"; + reg = <0x12340000 0x1000>; + #power-domain-cells = <1>; + }; + + child: power-controller@12340000 { + compatible = "foo,power-controller"; + reg = <0x12341000 0x1000>; + power-domains = <&parent 0>; + #power-domain-cells = <1>; + }; + +The nodes above define two power controllers: 'parent' and 'child'. +Domains created by the 'child' power controller are subdomains of '0' power +domain provided by the 'parent' power controller. + ==PM domain consumers== Required properties: -- cgit v1.2.3 From 0f7807518fe172353622700123615ae19701e693 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Wed, 4 Feb 2015 23:44:15 +0900 Subject: ARM: EXYNOS: add support for sub-power domains This patch adds support for making one power domain a sub-domain of other domain. This is useful for modeling power dependences for devices like TV Mixer or Camera ISP, which needs to have more than one power domain enabled to be operational. Based on previous work by Amit Daniel Kachhap . Signed-off-by: Marek Szyprowski Reviewed-by: Ulf Hansson Signed-off-by: Kukjin Kim --- .../bindings/arm/exynos/power_domain.txt | 2 ++ arch/arm/mach-exynos/pm_domains.c | 28 ++++++++++++++++++++++ 2 files changed, 30 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index f4445e5a2bbb..1e097037349c 100644 --- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt +++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt @@ -22,6 +22,8 @@ Optional Properties: - pclkN, clkN: Pairs of parent of input clock and input clock to the devices in this power domain. Maximum of 4 pairs (N = 0 to 3) are supported currently. +- power-domains: phandle pointing to the parent power domain, for more details + see Documentation/devicetree/bindings/power/power_domain.txt Node of a device using power domains must have a power-domains property defined with a phandle to respective power domain. diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index 20f267121b3e..37266a826437 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -161,6 +161,34 @@ no_clk: of_genpd_add_provider_simple(np, &pd->pd); } + /* Assign the child power domains to their parents */ + for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") { + struct generic_pm_domain *child_domain, *parent_domain; + struct of_phandle_args args; + + args.np = np; + args.args_count = 0; + child_domain = of_genpd_get_from_provider(&args); + if (!child_domain) + continue; + + if (of_parse_phandle_with_args(np, "power-domains", + "#power-domain-cells", 0, &args) != 0) + continue; + + parent_domain = of_genpd_get_from_provider(&args); + if (!parent_domain) + continue; + + if (pm_genpd_add_subdomain(parent_domain, child_domain)) + pr_warn("%s failed to add subdomain: %s\n", + parent_domain->name, child_domain->name); + else + pr_info("%s has as child subdomain: %s.\n", + parent_domain->name, child_domain->name); + of_node_put(np); + } + return 0; } arch_initcall(exynos4_pm_init_power_domain); -- cgit v1.2.3 From ddbd2b7ad99a418c60397901a0f3c997d030c65e Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Fri, 27 Feb 2015 11:44:24 -0800 Subject: Code of Conflict This file provides a basic guide for how to handle conflict resolution when it comes up in the development process. Acked-by: Alex Deucher Acked-by: Arjan van de Ven Acked-by: Arnaldo Carvalho de Melo Acked-by: Arnd Bergmann Acked-by: Benjamin Herrenschmidt Acked-by: Chris Ball Acked-by: Chris Mason Acked-by: Chris Metcalf Acked-by: Dan Carpenter Acked-by: Daniel Vetter Acked-by: Dave Airlie Acked-by: David Herrmann Acked-by: Fabio Estevam Acked-by: Felipe Balbi Acked-by: Geert Uytterhoeven Acked-by: Gerd Hoffmann Acked-by: Grant Likely Acked-by: Guenter Roeck Acked-by: H Hartley Sweeten Acked-by: Hannes Reinecke Acked-by: Hans Verkuil Acked-by: Hans de Goede Acked-by: Hugh Dickins Acked-by: Ingo Molnar Acked-by: Jaegeuk Kim Acked-by: James Bottomley Acked-by: Jens Axboe Acked-by: Jes Sorensen Acked-by: Johan Hedberg Acked-by: Johan Hovold Acked-by: Johannes Berg Acked-by: John W. Linville Acked-by: Jonathan Corbet Acked-by: Josh Triplett Acked-by: Julia Lawall Acked-by: Kees Cook Acked-by: Kevin Hilman Acked-by: Konrad Rzeszutek Wilk Acked-by: Kristen Carlson Accardi Acked-by: Kyungmin Park Acked-by: Laurent Pinchart Acked-by: Linus Walleij Acked-by: Luis R. Rodriguez Acked-by: Magnus Damm Acked-by: Mark Brown Acked-by: Mauro Carvalho Chehab Acked-by: Maxime Ripard Acked-by: Mimi Zohar Acked-by: NeilBrown Acked-by: Olof Johansson Acked-by: Paul E. McKenney Acked-by: Rafael J. Wysocki Acked-by: Rik van Riel Acked-by: Sachin Prabhu Acked-by: Shuah Khan Acked-by: Simon Horman Acked-by: Stephen Rothwell Acked-by: Stephen Warren Acked-by: Steven Rostedt Acked-by: Takashi Iwai Acked-by: Tejun Heo Acked-by: Theodore Ts'o Acked-by: Tony Luck Acked-by: Will Deacon Acked-by: Willy Tarreau Acked-by: Zefan Li Signed-off-by: Greg Kroah-Hartman --- Documentation/CodeOfConflict | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/CodeOfConflict (limited to 'Documentation') diff --git a/Documentation/CodeOfConflict b/Documentation/CodeOfConflict new file mode 100644 index 000000000000..1684d0b4efa6 --- /dev/null +++ b/Documentation/CodeOfConflict @@ -0,0 +1,27 @@ +Code of Conflict +---------------- + +The Linux kernel development effort is a very personal process compared +to "traditional" ways of developing software. Your code and ideas +behind it will be carefully reviewed, often resulting in critique and +criticism. The review will almost always require improvements to the +code before it can be included in the kernel. Know that this happens +because everyone involved wants to see the best possible solution for +the overall success of Linux. This development process has been proven +to create the most robust operating system kernel ever, and we do not +want to do anything to cause the quality of submission and eventual +result to ever decrease. + +If however, anyone feels personally abused, threatened, or otherwise +uncomfortable due to this process, that is not acceptable. If so, +please contact the Linux Foundation's Technical Advisory Board at +, or the individual members, and they +will work to resolve the issue to the best of their ability. For more +information on who is on the Technical Advisory Board and what their +role is, please see: + http://www.linuxfoundation.org/programs/advisory-councils/tab + +As a reviewer of code, please strive to keep things civil and focused on +the technical issues involved. We are all humans, and frustrations can +be high on both sides of the process. Try to keep in mind the immortal +words of Bill and Ted, "Be excellent to each other." -- cgit v1.2.3 From f71b10be4c8a24fcb3d17f3161e31cf09c66ea2f Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 12 Feb 2015 09:38:40 +0100 Subject: of: Add vendor prefix for Arasan PATA(pata_arasan_cf.c) and SDHCI(sdhci-of-arasan.c) drivers are already using this prefix. Signed-off-by: Michal Simek Signed-off-by: Rob Herring --- Documentation/devicetree/bindings/vendor-prefixes.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 389ca1347a77..db0e94f26149 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -20,6 +20,7 @@ amlogic Amlogic, Inc. ams AMS AG amstaos AMS-Taos Inc. apm Applied Micro Circuits Corporation (APM) +arasan Arasan Chip Systems arm ARM Ltd. armadeus ARMadeus Systems SARL asahi-kasei Asahi Kasei Corp. -- cgit v1.2.3 From 25e8f336e535d10c30216e1ba330fbea98dfccc5 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Wed, 18 Feb 2015 23:29:38 +0100 Subject: serial: add device tree binding documentation for ETRAX FS UART Signed-off-by: Niklas Cassel Signed-off-by: Rob Herring --- .../devicetree/bindings/serial/axis,etraxfs-uart.txt | 19 +++++++++++++++++++ Documentation/devicetree/bindings/vendor-prefixes.txt | 1 + 2 files changed, 20 insertions(+) create mode 100644 Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt b/Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt new file mode 100644 index 000000000000..ebcbb62c0a76 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/axis,etraxfs-uart.txt @@ -0,0 +1,19 @@ +ETRAX FS UART + +Required properties: +- compatible : "axis,etraxfs-uart" +- reg: offset and length of the register set for the device. +- interrupts: device interrupt + +Optional properties: +- {dtr,dsr,ri,cd}-gpios: specify a GPIO for DTR/DSR/RI/CD + line respectively. + +Example: + +serial@b00260000 { + compatible = "axis,etraxfs-uart"; + reg = <0xb0026000 0x1000>; + interrupts = <68>; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index db0e94f26149..fae26d014aaf 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -28,6 +28,7 @@ atmel Atmel Corporation auo AU Optronics Corporation avago Avago Technologies avic Shanghai AVIC Optoelectronics Co., Ltd. +axis Axis Communications AB bosch Bosch Sensortec GmbH brcm Broadcom Corporation buffalo Buffalo, Inc. -- cgit v1.2.3 From 566084007d3672aebd82a27b448095be67fb208f Mon Sep 17 00:00:00 2001 From: Sylvain Rochet Date: Sun, 18 Jan 2015 14:26:50 +0100 Subject: dts: Documentation: AT91 Watchdog, explain what atmel,idle-halt property really do atmel,idle-halt property should be used with care, it actually makes the watchdog not counting when the CPU is in idle state, therefore the watchdog reset time depends on mean CPU usage and will not reset at all of the CPU stop working while it is in idle state, which is probably not what you want. Signed-off-by: Sylvain Rochet Acked-by: Boris Brezillon Signed-off-by: Nicolas Ferre --- Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt index f90e294d7631..a4d869744f59 100644 --- a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -26,6 +26,11 @@ Optional properties: - atmel,disable : Should be present if you want to disable the watchdog. - atmel,idle-halt : Should be present if you want to stop the watchdog when entering idle state. + CAUTION: This property should be used with care, it actually makes the + watchdog not counting when the CPU is in idle state, therefore the + watchdog reset time depends on mean CPU usage and will not reset at all + if the CPU stop working while it is in idle state, which is probably + not what you want. - atmel,dbg-halt : Should be present if you want to stop the watchdog when entering debug state. -- cgit v1.2.3 From 955ab7e2adc9446257431d7d7ff509bdd1fe5ef8 Mon Sep 17 00:00:00 2001 From: Iyappan Subramanian Date: Tue, 3 Mar 2015 11:39:39 -0800 Subject: Documentation: dts: Update compatible field description for APM X-Gene Signed-off-by: Iyappan Subramanian Signed-off-by: Keyur Chudgar Tested-by: Mark Langsdorf Signed-off-by: David S. Miller --- Documentation/devicetree/bindings/net/apm-xgene-enet.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/net/apm-xgene-enet.txt b/Documentation/devicetree/bindings/net/apm-xgene-enet.txt index cfcc52705ed8..6151999c5dca 100644 --- a/Documentation/devicetree/bindings/net/apm-xgene-enet.txt +++ b/Documentation/devicetree/bindings/net/apm-xgene-enet.txt @@ -4,7 +4,10 @@ Ethernet nodes are defined to describe on-chip ethernet interfaces in APM X-Gene SoC. Required properties for all the ethernet interfaces: -- compatible: Should be "apm,xgene-enet" +- compatible: Should state binding information from the following list, + - "apm,xgene-enet": RGMII based 1G interface + - "apm,xgene1-sgenet": SGMII based 1G interface + - "apm,xgene1-xgenet": XFI based 10G interface - reg: Address and length of the register set for the device. It contains the information of registers in the same order as described by reg-names - reg-names: Should contain the register set names -- cgit v1.2.3 From 7438b633a6b073d66a3fa3678ec0dd5928caa4af Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Wed, 4 Mar 2015 20:00:40 +0000 Subject: genirq / PM: describe IRQF_COND_SUSPEND With certain restrictions it is possible for a wakeup device to share an IRQ with an IRQF_NO_SUSPEND user, and the warnings introduced by commit cab303be91dc47942bc25de33dc1140123540800 are spurious. The new IRQF_COND_SUSPEND flag allows drivers to tell the core when these restrictions are met, allowing spurious warnings to be silenced. This patch documents how IRQF_COND_SUSPEND is expected to be used, updating some of the text now made invalid by its addition. Signed-off-by: Mark Rutland Signed-off-by: Rafael J. Wysocki --- Documentation/power/suspend-and-interrupts.txt | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/power/suspend-and-interrupts.txt b/Documentation/power/suspend-and-interrupts.txt index 50493c9284b4..8afb29a8604a 100644 --- a/Documentation/power/suspend-and-interrupts.txt +++ b/Documentation/power/suspend-and-interrupts.txt @@ -112,8 +112,9 @@ any special interrupt handling logic for it to work. IRQF_NO_SUSPEND and enable_irq_wake() ------------------------------------- -There are no valid reasons to use both enable_irq_wake() and the IRQF_NO_SUSPEND -flag on the same IRQ. +There are very few valid reasons to use both enable_irq_wake() and the +IRQF_NO_SUSPEND flag on the same IRQ, and it is never valid to use both for the +same device. First of all, if the IRQ is not shared, the rules for handling IRQF_NO_SUSPEND interrupts (interrupt handlers are invoked after suspend_device_irqs()) are @@ -122,4 +123,13 @@ handlers are not invoked after suspend_device_irqs()). Second, both enable_irq_wake() and IRQF_NO_SUSPEND apply to entire IRQs and not to individual interrupt handlers, so sharing an IRQ between a system wakeup -interrupt source and an IRQF_NO_SUSPEND interrupt source does not make sense. +interrupt source and an IRQF_NO_SUSPEND interrupt source does not generally +make sense. + +In rare cases an IRQ can be shared between a wakeup device driver and an +IRQF_NO_SUSPEND user. In order for this to be safe, the wakeup device driver +must be able to discern spurious IRQs from genuine wakeup events (signalling +the latter to the core with pm_system_wakeup()), must use enable_irq_wake() to +ensure that the IRQ will function as a wakeup source, and must request the IRQ +with IRQF_COND_SUSPEND to tell the core that it meets these requirements. If +these requirements are not met, it is not valid to use IRQF_COND_SUSPEND. -- cgit v1.2.3 From 5d232112f94b0f3920dc4fec09688ef6cb5c09df Mon Sep 17 00:00:00 2001 From: Matt Porter Date: Tue, 3 Mar 2015 11:57:08 -0500 Subject: i2c: imx: add required clocks property to binding A clock specifier is required for i.MX I2C and is provided in all DTS implementations. Add this to the list of required properties in the binding. Signed-off-by: Matt Porter Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c-imx.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/i2c/i2c-imx.txt b/Documentation/devicetree/bindings/i2c/i2c-imx.txt index 52d37fd8d3e5..ce4311d726ae 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-imx.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-imx.txt @@ -7,6 +7,7 @@ Required properties: - "fsl,vf610-i2c" for I2C compatible with the one integrated on Vybrid vf610 SoC - reg : Should contain I2C/HS-I2C registers location and length - interrupts : Should contain I2C/HS-I2C interrupt +- clocks : Should contain the I2C/HS-I2C clock specifier Optional properties: - clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz. -- cgit v1.2.3 From dfd37668ea6d5029fb5d8a66ea5e202d0655fad7 Mon Sep 17 00:00:00 2001 From: Desmond Liu Date: Thu, 26 Feb 2015 16:35:57 -0800 Subject: serial: 8250_dw: Fix get_mctrl behaviour Fixed behaviour of get_mctrl() serial driver function as documented in: https://www.kernel.org/doc/Documentation/serial/driver Added device-tree properties 'dcd-override', 'dsr-override', 'cts-override', and 'ri-override' specific to the Synopsis 8250 DesignWare UART driver. Allows one to force Data Carrier Detect, Clear To Send, and Data Set Ready signals to permanently be reported as active. The Ring indicator can be forced to be reported as inactive. It is possible that if modem control signalling is enabled on a port that doesn't have these pins (e.g. - a simple two wire Tx/Rx port), the driver can hang indefinitely waiting for the state to change. The new DT properties allow the driver to ignore the state of these pins on serial ports that don't support them, as recommended in the kernel documentation. Reviewed-by: JD (Jiandong) Zheng Signed-off-by: Jonathan Richardson Signed-off-by: Greg Kroah-Hartman --- .../bindings/serial/snps-dw-apb-uart.txt | 16 +++++++++++ drivers/tty/serial/8250/8250_dw.c | 32 ++++++++++++++++++++++ 2 files changed, 48 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt index 7f76214f728a..289c40ed7470 100644 --- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt +++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.txt @@ -21,6 +21,18 @@ Optional properties: - reg-io-width : the size (in bytes) of the IO accesses that should be performed on the device. If this property is not present then single byte accesses are used. +- dcd-override : Override the DCD modem status signal. This signal will always + be reported as active instead of being obtained from the modem status + register. Define this if your serial port does not use this pin. +- dsr-override : Override the DTS modem status signal. This signal will always + be reported as active instead of being obtained from the modem status + register. Define this if your serial port does not use this pin. +- cts-override : Override the CTS modem status signal. This signal will always + be reported as active instead of being obtained from the modem status + register. Define this if your serial port does not use this pin. +- ri-override : Override the RI modem status signal. This signal will always be + reported as inactive instead of being obtained from the modem status register. + Define this if your serial port does not use this pin. Example: @@ -31,6 +43,10 @@ Example: interrupts = <10>; reg-shift = <2>; reg-io-width = <4>; + dcd-override; + dsr-override; + cts-override; + ri-override; }; Example with one clock: diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index e60116235836..2ab229ddee38 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -59,6 +59,8 @@ struct dw8250_data { u8 usr_reg; int last_mcr; int line; + int msr_mask_on; + int msr_mask_off; struct clk *clk; struct clk *pclk; struct reset_control *rst; @@ -81,6 +83,12 @@ static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value) value &= ~UART_MSR_DCTS; } + /* Override any modem control signals if needed */ + if (offset == UART_MSR) { + value |= d->msr_mask_on; + value &= ~d->msr_mask_off; + } + return value; } @@ -334,6 +342,30 @@ static int dw8250_probe_of(struct uart_port *p, if (id >= 0) p->line = id; + if (of_property_read_bool(np, "dcd-override")) { + /* Always report DCD as active */ + data->msr_mask_on |= UART_MSR_DCD; + data->msr_mask_off |= UART_MSR_DDCD; + } + + if (of_property_read_bool(np, "dsr-override")) { + /* Always report DSR as active */ + data->msr_mask_on |= UART_MSR_DSR; + data->msr_mask_off |= UART_MSR_DDSR; + } + + if (of_property_read_bool(np, "cts-override")) { + /* Always report DSR as active */ + data->msr_mask_on |= UART_MSR_DSR; + data->msr_mask_off |= UART_MSR_DDSR; + } + + if (of_property_read_bool(np, "ri-override")) { + /* Always report Ring indicator as inactive */ + data->msr_mask_off |= UART_MSR_RI; + data->msr_mask_off |= UART_MSR_TERI; + } + /* clock got configured through clk api, all done */ if (p->uartclk) return 0; -- cgit v1.2.3 From 20aa4d8ae8d2ada8f959364ebc096b8841245456 Mon Sep 17 00:00:00 2001 From: Chunyan Zhang Date: Fri, 16 Jan 2015 18:00:07 +0800 Subject: Documentation: DT: Renamed of-serial.txt to 8250.txt The file of-serial.txt was only for 8250 compatible UART implementations, so renamed it to 8250.txt to avoid confusing other persons. This is suggested by Arnd, see: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/291455.html Signed-off-by: Chunyan Zhang Acked-by: Mark Rutland Signed-off-by: Rob Herring --- Documentation/devicetree/bindings/serial/8250.txt | 66 ++++++++++++++++++++++ .../devicetree/bindings/serial/of-serial.txt | 66 ---------------------- 2 files changed, 66 insertions(+), 66 deletions(-) create mode 100644 Documentation/devicetree/bindings/serial/8250.txt delete mode 100644 Documentation/devicetree/bindings/serial/of-serial.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/serial/8250.txt b/Documentation/devicetree/bindings/serial/8250.txt new file mode 100644 index 000000000000..91d5ab0e60fc --- /dev/null +++ b/Documentation/devicetree/bindings/serial/8250.txt @@ -0,0 +1,66 @@ +* UART (Universal Asynchronous Receiver/Transmitter) + +Required properties: +- compatible : one of: + - "ns8250" + - "ns16450" + - "ns16550a" + - "ns16550" + - "ns16750" + - "ns16850" + - For Tegra20, must contain "nvidia,tegra20-uart" + - For other Tegra, must contain '"nvidia,-uart", + "nvidia,tegra20-uart"' where is tegra30, tegra114, tegra124, + tegra132, or tegra210. + - "nxp,lpc3220-uart" + - "ralink,rt2880-uart" + - "ibm,qpace-nwp-serial" + - "altr,16550-FIFO32" + - "altr,16550-FIFO64" + - "altr,16550-FIFO128" + - "fsl,16550-FIFO64" + - "fsl,ns16550" + - "serial" if the port type is unknown. +- reg : offset and length of the register set for the device. +- interrupts : should contain uart interrupt. +- clock-frequency : the input clock frequency for the UART + or + clocks phandle to refer to the clk used as per Documentation/devicetree + /bindings/clock/clock-bindings.txt + +Optional properties: +- current-speed : the current active speed of the UART. +- reg-offset : offset to apply to the mapbase from the start of the registers. +- reg-shift : quantity to shift the register offsets by. +- reg-io-width : the size (in bytes) of the IO accesses that should be + performed on the device. There are some systems that require 32-bit + accesses to the UART (e.g. TI davinci). +- used-by-rtas : set to indicate that the port is in use by the OpenFirmware + RTAS and should not be registered. +- no-loopback-test: set to indicate that the port does not implements loopback + test mode +- fifo-size: the fifo size of the UART. +- auto-flow-control: one way to enable automatic flow control support. The + driver is allowed to detect support for the capability even without this + property. + +Note: +* fsl,ns16550: + ------------ + Freescale DUART is very similar to the PC16552D (and to a + pair of NS16550A), albeit with some nonstandard behavior such as + erratum A-004737 (relating to incorrect BRK handling). + + Represents a single port that is compatible with the DUART found + on many Freescale chips (examples include mpc8349, mpc8548, + mpc8641d, p4080 and ls2085a). + +Example: + + uart@80230000 { + compatible = "ns8250"; + reg = <0x80230000 0x100>; + clock-frequency = <3686400>; + interrupts = <10>; + reg-shift = <2>; + }; diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/of-serial.txt deleted file mode 100644 index 91d5ab0e60fc..000000000000 --- a/Documentation/devicetree/bindings/serial/of-serial.txt +++ /dev/null @@ -1,66 +0,0 @@ -* UART (Universal Asynchronous Receiver/Transmitter) - -Required properties: -- compatible : one of: - - "ns8250" - - "ns16450" - - "ns16550a" - - "ns16550" - - "ns16750" - - "ns16850" - - For Tegra20, must contain "nvidia,tegra20-uart" - - For other Tegra, must contain '"nvidia,-uart", - "nvidia,tegra20-uart"' where is tegra30, tegra114, tegra124, - tegra132, or tegra210. - - "nxp,lpc3220-uart" - - "ralink,rt2880-uart" - - "ibm,qpace-nwp-serial" - - "altr,16550-FIFO32" - - "altr,16550-FIFO64" - - "altr,16550-FIFO128" - - "fsl,16550-FIFO64" - - "fsl,ns16550" - - "serial" if the port type is unknown. -- reg : offset and length of the register set for the device. -- interrupts : should contain uart interrupt. -- clock-frequency : the input clock frequency for the UART - or - clocks phandle to refer to the clk used as per Documentation/devicetree - /bindings/clock/clock-bindings.txt - -Optional properties: -- current-speed : the current active speed of the UART. -- reg-offset : offset to apply to the mapbase from the start of the registers. -- reg-shift : quantity to shift the register offsets by. -- reg-io-width : the size (in bytes) of the IO accesses that should be - performed on the device. There are some systems that require 32-bit - accesses to the UART (e.g. TI davinci). -- used-by-rtas : set to indicate that the port is in use by the OpenFirmware - RTAS and should not be registered. -- no-loopback-test: set to indicate that the port does not implements loopback - test mode -- fifo-size: the fifo size of the UART. -- auto-flow-control: one way to enable automatic flow control support. The - driver is allowed to detect support for the capability even without this - property. - -Note: -* fsl,ns16550: - ------------ - Freescale DUART is very similar to the PC16552D (and to a - pair of NS16550A), albeit with some nonstandard behavior such as - erratum A-004737 (relating to incorrect BRK handling). - - Represents a single port that is compatible with the DUART found - on many Freescale chips (examples include mpc8349, mpc8548, - mpc8641d, p4080 and ls2085a). - -Example: - - uart@80230000 { - compatible = "ns8250"; - reg = <0x80230000 0x100>; - clock-frequency = <3686400>; - interrupts = <10>; - reg-shift = <2>; - }; -- cgit v1.2.3 From d1e9fa98387549a24633fb6b00a26edb34382488 Mon Sep 17 00:00:00 2001 From: Matt Porter Date: Thu, 5 Mar 2015 10:53:11 -0500 Subject: dt: submitting-patches: clarify that DT maintainers are to be cced on bindings The exact steps provided for submitting binding patches can be read as requiring the bindings to be sent only to the devicetree@vger.kernel.org list. Since the DT maintainers would like to be Cced on any binding submissions, make this requirement explicit in step 2. Signed-off-by: Matt Porter Signed-off-by: Rob Herring --- Documentation/devicetree/bindings/submitting-patches.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/submitting-patches.txt b/Documentation/devicetree/bindings/submitting-patches.txt index 56742bc70218..7d44eae7ab0b 100644 --- a/Documentation/devicetree/bindings/submitting-patches.txt +++ b/Documentation/devicetree/bindings/submitting-patches.txt @@ -12,6 +12,9 @@ I. For patch submitters devicetree@vger.kernel.org + and Cc: the DT maintainers. Use scripts/get_maintainer.pl to identify + all of the DT maintainers. + 3) The Documentation/ portion of the patch should come in the series before the code implementing the binding. -- cgit v1.2.3 From 60b3c7ed7197705716f32a34fafb5570cf4f129a Mon Sep 17 00:00:00 2001 From: Fabrice GASNIER Date: Thu, 5 Mar 2015 16:53:54 +0100 Subject: ARM: STi: Add STiH410 SoC support This patch adds support to STiH410 SoC. Please note "st,stih410" is already present in device tree. The problem is that it is missing the entry in the match table, and so the L2 cache and other cpus than 0 don't get initialized. Signed-off-by: Fabrice Gasnier Tested-by: Maxime Coquelin Acked-by: Peter Griffin Acked-by: Lee Jones Signed-off-by: Maxime Coquelin Signed-off-by: Arnd Bergmann --- Documentation/devicetree/bindings/arm/sti.txt | 4 ++++ arch/arm/mach-sti/board-dt.c | 1 + 2 files changed, 5 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/arm/sti.txt b/Documentation/devicetree/bindings/arm/sti.txt index d70ec358736c..8d27f6b084c7 100644 --- a/Documentation/devicetree/bindings/arm/sti.txt +++ b/Documentation/devicetree/bindings/arm/sti.txt @@ -13,6 +13,10 @@ Boards with the ST STiH407 SoC shall have the following properties: Required root node property: compatible = "st,stih407"; +Boards with the ST STiH410 SoC shall have the following properties: +Required root node property: +compatible = "st,stih410"; + Boards with the ST STiH418 SoC shall have the following properties: Required root node property: compatible = "st,stih418"; diff --git a/arch/arm/mach-sti/board-dt.c b/arch/arm/mach-sti/board-dt.c index b067390cef4e..b373acade338 100644 --- a/arch/arm/mach-sti/board-dt.c +++ b/arch/arm/mach-sti/board-dt.c @@ -18,6 +18,7 @@ static const char *stih41x_dt_match[] __initdata = { "st,stih415", "st,stih416", "st,stih407", + "st,stih410", "st,stih418", NULL }; -- cgit v1.2.3