| Commit message (Collapse) | Author | Age | Files | Lines |
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It is good to allow berlin pinctrl driver to build with COMPILE_TEST, so
make the it menu visible when compile-testing.
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This is to prepare for the next berlin4ct support, where we won't use
simple-mfd any more.
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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PIN_CONFIG_INPUT_SCHMITT is defined in enum_pin_config_param,
but the corresponding DT property is missing.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Currently, the dt_params array in drivers/pinctrl/pinconf-generic.c
is not sorted in the same order as the enum pin_config_param in
include/linux/pinctrl/pinconf-generic.h.
Sort enum pin_config_param, conf_items, dt_params, alphabetically
for consistency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Irq argument as been removed from irq flow handlers so use the irq
descriptor to retrieve data we need.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Use irq_set_handler_locked() as it avoids a redundant lookup of the
irq descriptor.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add iomuxc-lpsr devicetree bindings documentation
Provide documentation context as well an example on
pheriperals that could use pad from either iomuxc controller
supported by iMX7D SoC
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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iMX7D has two iomuxc controllers, iomuxc controller similar as
previous iMX SoC generation and iomuxc-lpsr which provides low
power state rentetion capabilities on gpios that are part of
iomuxc-lpsr
Add iomuxc-lpsr gpio group id's
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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- Add shared input select register support
- imx7d has two iomux controllers iomuxc and iomuxc-lpsr
which share select_input register for daisy chain settings
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Allow mux_reg offset zero to be a valid pin_id, on imx7d
mux_conf reg offset is zero for iomuxc-lspr controller
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Fix system chrash caused by groups whose number is smaller than the number
of groups of the last pinctl instance which is not initialized.
iMX7D supports two iomux controllers (iomuxc-lpsr and iomuxc) on probing
the second instance (iomuxc) the chrash below occurs.
Uncompressing Linux... done, booting the kernel.
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.2.0-next-20150901-00006-gebfa43c (aalonso@bluefly)
[ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7)
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasin instruction cache
[ 0.000000] Machine model: Freescale i.MX7 SabreSD Board
[ 0.661012] [<802a6cb0>] (strcmp) from [<802cc80c>] (imx_dt_node_to_map+0x58/0x208)
[ 0.668879] [<802cc80c>] (imx_dt_node_to_map) from [<802cbe24>] (pinctrl_dt_to_map+0x174/0x2b0)
[ 0.677654] [<802cbe24>] (pinctrl_dt_to_map) from [<802c8f18>] (pinctrl_get+0x100/0x424)
[ 0.685878] [<802c8f18>] (pinctrl_get) from [<802c9510>] (pinctrl_register+0x26c/0x480)
[ 0.694104] [<802c9510>] (pinctrl_register) from [<802ccf3c>] (imx_pinctrl_probe+0x580/0x6e8)
[ 0.702706] [<802ccf3c>] (imx_pinctrl_probe) from [<80351b58>] (platform_drv_probe+0x44/0xa4)
[ 0.711455] [<80351b58>] (platform_drv_probe) from [<803503ec>] (driver_probe_device+0x174/0x2b4)
[ 0.720405] [<803503ec>] (driver_probe_device) from [<803505fc>] (__driver_attach+0x8c/0x90)
[ 0.728982] [<803505fc>] (__driver_attach) from [<8034e930>] (bus_for_each_dev+0x6c/0xa0)
[ 0.737381] [<8034e930>] (bus_for_each_dev) from [<8034fb88>] (bus_add_driver+0x148/0x1f0)
[ 0.745804] [<8034fb88>] (bus_add_driver) from [<80350c00>] (driver_register+0x78/0xf8)
[ 0.753880] [<80350c00>] (driver_register) from [<800097d0>] (do_one_initcall+0x8c/0x1d4)
[ 0.762282] [<800097d0>] (do_one_initcall) from [<80987dac>] (kernel_init_freeable+0x144/0x1e4)
[ 0.771061] [<80987dac>] (kernel_init_freeable) from [<806d9c7c>] (kernel_init+0x8/0xe8)
[ 0.779285] [<806d9c7c>] (kernel_init) from [<8000f628>] (ret_from_fork+0x14/0x2c)
[ 0.786981] Code: e3520000 e5e32001 1afffffb e12fff1e (e4d03001)
Signed-off-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Allow GPIOs to be configured as wakeup sources. When going to suspend,
disable all GPIO irqs excepting the one configured as wakeup sources.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Allwinner A83T soc port controller has 8 ports.
It has 3 IRQ banks namely PB, PG, PH.
Pinmuxing are different for some pins as compared to
sun8i A23 and A33.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add SD card pinmux settings for PH1-LD4, PH1-Pro4, PH1-sLD8,
PH1-Pro5, ProXstream2, and PH1-LD6b SoCs.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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It's not needed an is just creating a null statement, so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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It's not needed an is just creating a null statement, so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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It's not needed an is just creating a null statement, so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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It's not needed an is just creating a null statement, so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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They aren't needed and are just creating null statements so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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They aren't needed and are just creating null statements so remove it.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
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This patch adds EthernetAVB
Based on a much lager patch by Takeshi Kihara which was
originally posted by Kuninori Morimoto.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[horms: extracted from a larger patch;
corrected swapped {MATCH,CAPTURE_A} pins]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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This patch adds SCIF0/1/2/3/4/5
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[Morimoto-san: Updated]
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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Add PFC base support for the R8A7795 SoC.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[Morimoto-san: updated]
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now, all PINMUX_IPSR_MODSEL_DATA() are replased to PINMUX_IPSR_MSEL()
Let's remove unused PINMUX_IPSR_MODSEL_DATA()
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now, PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA() are same.
Current PFC driver is very difficult to read, because macro names are
using different length.
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
PINMUX_IPSR_MODSEL_DATA(ipsr, ...)
It can be readable if we can use PINMUX_IPSR_MSEL() instead
of PINMUX_IPSR_MODSEL_DATA()
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now, PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA() are same.
Current PFC driver is very difficult to read, because macro names are
using different length.
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
PINMUX_IPSR_MODSEL_DATA(ipsr, ...)
It can be readable if we can use PINMUX_IPSR_MSEL() instead
of PINMUX_IPSR_MODSEL_DATA()
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now, PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA() are same.
Current PFC driver is very difficult to read, because macro names are
using different length.
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
PINMUX_IPSR_MODSEL_DATA(ipsr, ...)
It can be readable if we can use PINMUX_IPSR_MSEL() instead
of PINMUX_IPSR_MODSEL_DATA()
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now, PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA() are same.
Current PFC driver is very difficult to read, because macro names are
using different length.
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
PINMUX_IPSR_MODSEL_DATA(ipsr, ...)
It can be readable if we can use PINMUX_IPSR_MSEL() instead
of PINMUX_IPSR_MODSEL_DATA()
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now, PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA() are same.
Current PFC driver is very difficult to read, because macro names are
using different length.
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
PINMUX_IPSR_MODSEL_DATA(ipsr, ...)
It can be readable if we can use PINMUX_IPSR_MSEL() instead
of PINMUX_IPSR_MODSEL_DATA()
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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The difference between PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA()
are FN_xxx order, and PINMUX_IPSR_MSEL() is used only from r8a7778.
Now it r8a7778 works correctly with PINMUX_IPSR_MODSEL_DATA() order.
This means we can merge PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA().
Current PFC driver is very difficult to read, because macro names are
using different length. Especially PINMUX_IPSR_MODSEL_DATA() is well
used macro
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
PINMUX_IPSR_MODSEL_DATA(ipsr, ...)
It can be readable if we can merge
PINMUX_IPSR_MSEL() and PINMUX_IPSR_MODSEL_DATA()
PINMUX_IPSR_NOGP(ispr, ...)
PINMUX_IPSR_DATA(ipsr, ...)
PINMUX_IPSR_NOGM(ispr, ...)
PINMUX_IPSR_NOFN(ipsr, ...)
PINMUX_IPSR_MSEL(ipsr, ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Now that all ARM-based Renesas SoCs use multiplatform kernels only the
hardcoded IRQ numbers can be dropped as they're dynamically allocated.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Shmobile is all multiplatform these days, so get rid of the reference to
CONFIG_ARCH_SHMOBILE_LEGACY.
Move the legacy code to do the non-DT mapping between GPIOs and pins
inside the existing #ifdef CONFIG_SUPERH section.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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When using serial port SCIFB1_B, transmit works, but nothing is
received.
Receive fails because the SCIFB1_SCK_B settings configure the wrong
value for the sel_scifb1 field in the Module Select Register (MOD_SEL),
due to an ambiguity in the R-Car M2-W and M2-N datasheets.
Tested on r8a7791/koelsch using pins 53 (TXD) and 72 (RXD) on EXIO
Connector A.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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SCIF0 on R-Car E2 does not have an SCK pin.
"SCIF_CLK" is the (H)SCIF baud rate generation clock pin, which is not
yet supported.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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Legacy function GPIOs are no longer used on ARM since commit
a27c5cd1a08cc95c ("sh-pfc: sh73a0: Remove function GPIOs").
Extract its setup code into a separate function, and make all function
GPIO related code and data depend on CONFIG_SUPERH.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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gpio_chip.free() is optional, and can just be left unimplemented.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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On platforms where the PFC/GPIO controller is instantiated from DT, the
mapping between GPIOs and pins is set up using the "gpio-ranges"
property in DT.
Hence stop setting up the mapping from C code on DT platforms.
This code is still used for SH or ARM-legacy platforms.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The mediatek pinctrl driver uses the BIT() macro instead of open
coding 1 << n in all but one place. Replace this occurrence with
the BIT() macro for consistency.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Many parts of pinctrl rk3036 are similar to rk2928's.
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add pio4 controller node to enable pinmux and gpio.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add an entry for the Atmel PIO4 controller driver.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add documentation for the Atmel PIO4 controller introduced with SAMA5D2
chip family.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add a pinctrl/gpio driver for Atmel PIO4 controller available on SAMA5D2
chip family.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Pull ARM fixes from Russell King:
"Three fixes and a resulting cleanup for -rc2:
- Andre Przywara reported that he was seeing a warning with the new
cast inside DMA_ERROR_CODE's definition, and fixed the incorrect
use.
- Doug Anderson noticed that kgdb causes a "scheduling while atomic"
bug.
- OMAP5 folk noticed that their Thumb-2 compiled X servers crashed
when enabling support to cover ARMv6 CPUs due to a kernel bug
leaking some conditional context into the signal handler"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints
ARM: 8437/1: dma-mapping: fix build warning with new DMA_ERROR_CODE definition
ARM: get rid of needless #if in signal handling code
ARM: fix Thumb2 signal handling when ARMv6 is enabled
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In (23a4e40 arm: kgdb: Handle read-only text / modules) we moved to
using patch_text() to set breakpoints so that we could handle the case
when we had CONFIG_DEBUG_RODATA. That patch used patch_text().
Unfortunately, patch_text() assumes that we're not in atomic context
when it runs since it needs to grab a mutex and also wait for other
CPUs to stop (which it does with a completion).
This would result in a stack crawl if you had
CONFIG_DEBUG_ATOMIC_SLEEP and tried to set a breakpoint in kgdb. The
crawl looked something like:
BUG: scheduling while atomic: swapper/0/0/0x00010007
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.2.0-rc7-00133-geb63b34 #1073
Hardware name: Rockchip (Device Tree)
(unwind_backtrace) from [<c00133d4>] (show_stack+0x20/0x24)
(show_stack) from [<c05400e8>] (dump_stack+0x84/0xb8)
(dump_stack) from [<c004913c>] (__schedule_bug+0x54/0x6c)
(__schedule_bug) from [<c054065c>] (__schedule+0x80/0x668)
(__schedule) from [<c0540cfc>] (schedule+0xb8/0xd4)
(schedule) from [<c0543a3c>] (schedule_timeout+0x2c/0x234)
(schedule_timeout) from [<c05417c0>] (wait_for_common+0xf4/0x188)
(wait_for_common) from [<c0541874>] (wait_for_completion+0x20/0x24)
(wait_for_completion) from [<c00a0104>] (__stop_cpus+0x58/0x70)
(__stop_cpus) from [<c00a0580>] (stop_cpus+0x3c/0x54)
(stop_cpus) from [<c00a06c4>] (__stop_machine+0xcc/0xe8)
(__stop_machine) from [<c00a0714>] (stop_machine+0x34/0x44)
(stop_machine) from [<c00173e8>] (patch_text+0x28/0x34)
(patch_text) from [<c001733c>] (kgdb_arch_set_breakpoint+0x40/0x4c)
(kgdb_arch_set_breakpoint) from [<c00a0d68>] (kgdb_validate_break_address+0x2c/0x60)
(kgdb_validate_break_address) from [<c00a0e90>] (dbg_set_sw_break+0x1c/0xdc)
(dbg_set_sw_break) from [<c00a2e88>] (gdb_serial_stub+0x9c4/0xba4)
(gdb_serial_stub) from [<c00a11cc>] (kgdb_cpu_enter+0x1f8/0x60c)
(kgdb_cpu_enter) from [<c00a18cc>] (kgdb_handle_exception+0x19c/0x1d0)
(kgdb_handle_exception) from [<c0016f7c>] (kgdb_compiled_brk_fn+0x30/0x3c)
(kgdb_compiled_brk_fn) from [<c00091a4>] (do_undefinstr+0x1a4/0x20c)
(do_undefinstr) from [<c001400c>] (__und_svc_finish+0x0/0x34)
It turns out that when we're in kgdb all the CPUs are stopped anyway
so there's no reason we should be calling patch_text(). We can
instead directly call __patch_text() which assumes that CPUs have
already been stopped.
Fixes: 23a4e4050ba9 ("arm: kgdb: Handle read-only text / modules")
Reported-by: Aapo Vienamo <avienamo@nvidia.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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