Age | Commit message (Collapse) | Author |
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Instead of relying on the bootloader for configuring the FEC pins, pass the
FEC pin configuration via device tree instead.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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UART1 is the console port on mx25pdk board.
Add the pin configuration for UART1 port and also pass 'fsl,uart-has-rtscts'
to indicate that the port has RTS and CTS pins.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Keep the dt nodes sorted for better readability.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Make the red gpio led available to the user.
This can be toggled with the sysfs for example, or used as a heartbeat or mmc
activity light by changing the trigger.
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This patch adds pin group for Synchronous Serial Interface 1 (SSI1)
for PCM-038 module and enables this interface. This change do nothing
at the current stage but helps to continue develop sound support.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This patch adds missing pinctrl definition for SPI chipselect 1.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Add alias for FEC ethernet on i.MX to allow bootloaders (like U-Boot)
patch-in the MAC address for FEC using this alias.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Cc: Eric Bénard <eric@eukrea.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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i.MX device tree changes for 3.15, take 2:
- Cleanup and device additions for imx27-phytec-phycard boards
- eDMA and audio support for vf610-twr board
- Minor updates and fixes for a couple of imx28 and imx5 boards
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i.MX6 device tree changes for 3.15, take 2:
- Add USB, GPMI and SATA support for imx6q-phytec board
- Update imx6sl-evk board support regarding PFUZE100, audio and
LED etc.
- Minor updates on a few imx6qdl boards
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The function v7_secondary_startup() works just fine in .text section, so
there is no need to have .text.head section annotation at all. Drop it.
Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Even when CONFIG_SUSPEND is enabled, it makes no sense to build
suspend-imx6.o if none of i.MX6 support is built in. Let's build
suspend-imx6.o only when both CONFIG_SUSPEND and CONFIG_SOC_IMX6 are
enabled.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The pm-imx6q.c works for all i.MX6 SoCs, so let's rename it to pm-imx6.c
and have the build controlled by option CONFIG_SOC_IMX6.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The i.MX6 SoCs have something in common, so let's introduce
CONFIG_SOC_IMX6 for those stuff.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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When CONFIG_SUSPEND is not enabled, we should reasonably skip the call
to imx6q_suspend_init().
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Rename function imx6q_ocram_suspend_init() to imx6q_suspend_init() and
call suspend_set_ops() from there. Now we get a centralized function
for suspend initialization.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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With v7_cpu_resume() being moved out of headsmp.S, all the remaining
code in the file is only needed by CONFIG_SMP build. So we can control
the build of headsmp.o with only obj-$(CONFIG_SMP) now.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The suspend-imx6.S is introduced recently for suspend low-level assembly
code. Since function v7_cpu_resume() is only used by suspend support,
it makes sense to move the function into suspend-imx6.S, and control the
build of the file with CONFIG_SUSPEND option.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This is needed so that the IPU framebuffer scanout cannot be
starved by VPU or GPU activity.
Some boards like the SabreLite and SabreSD seem to set this in
the DCD already, but the documented register reset values do not
contain the necessary settings.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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SOC_IMX53 is a device-tree only platform, so we don't need
IMX_HAVE_PLATFORM_IMX2_WDT at all because this symbol only provides some code
to help register imx2-wdt platform devices.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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CONFIG_DEBUG_FS is a very useful debug option as it allow us to access key
data such as the clock tree, for example:
mount -t debugfs debugfs /sys/kernel/debug
cat /sys/kernel/debug/clk/clk_summary
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Booting a mx6q system built with multi_v7_defconfig leads to the following
error messages on boot:
[ 0.037758] imx6q_ocram_suspend_init: ocram pool unavailable!
[ 0.037768] imx6_pm_common_init: failed to initialize ocram suspend -19!
This happens because CONFIG_SRAM is not selected by default in
multi_v7_defconfig.
Fix this by selecting CONFIG_SRAM at ARCH_MXC level, so that other SoCs could
use the SRAM driver as well.
As SRAM automatically selects GENERIC_ALLOCATOR, just drop it from the Kconfig
entry.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The fuse map of speed_grading[1:0] defines the max speed
of ARM, see below the definition:
2b'11: 1200000000Hz;
2b'10: 996000000Hz;
2b'01: 852000000Hz; -- i.MX6Q Only, exclusive with 996MHz.
2b'00: 792000000Hz;
Need to remove all illegal setpoints according to fuse
map.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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As clk_pllv3_wait_lock will call usleep_range, and the clk APIs
mutex lock may be held when CPU entering idle, so calling clk
APIs must be avoided in cpu idle thread, this is to avoid reschedule
warning in cpu idle, just access register directly to achieve that.
bad: scheduling from the idle thread!
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.0-rc1+ #657
Backtrace:
[<80012188>] (dump_backtrace) from [<8001246c>] (show_stack+0x18/0x1c)
r6:808c0038 r5:00000000 r4:808e5a1c r3:00000000
[<80012454>] (show_stack) from [<8064b2ec>] (dump_stack+0x84/0x9c)
[<8064b268>] (dump_stack) from [<80055ee0>] (dequeue_task_idle+0x20/0x30)
r5:808bef40 r4:bf7dff40
[<80055ec0>] (dequeue_task_idle) from [<8004f028>] (dequeue_task+0x30/0x50)
r4:bf7dff40 r3:80055ec0
[<8004eff8>] (dequeue_task) from [<800503c0>] (deactivate_task+0x30/0x34)
r4:bf7dff40
[<80050390>] (deactivate_task) from [<8064d8e4>] (__schedule+0x2c8/0x5c0)
[<8064d61c>] (__schedule) from [<8064dc14>] (schedule+0x38/0x88)
r10:80912964 r9:808c1e50 r8:808c0038 r7:808cbf30 r6:80e128ec r5:60000093
r4:80912968
[<8064dbdc>] (schedule) from [<8064dfec>] (schedule_preempt_disabled+0x10/0x14)
[<8064dfdc>] (schedule_preempt_disabled) from [<8064ebc0>] (mutex_lock_nested+0x1c0/0x3c0)
[<8064ea00>] (mutex_lock_nested) from [<804ae71c>] (clk_prepare_lock+0x44/0xe4)
r10:806554cc r9:bf7df1bc r8:808cf4f8 r7:808cf544 r6:bf7df1b8 r5:808c0010
r4:80e69750
[<804ae6d8>] (clk_prepare_lock) from [<804af214>] (clk_get_rate+0x14/0x64)
r6:bf7df1b8 r5:00000002 r4:bf017000 r3:80922ad0
[<804af200>] (clk_get_rate) from [<80025d30>] (imx6sl_set_wait_clk+0x18/0x20)
r5:00000002 r4:00000001
[<80025d18>] (imx6sl_set_wait_clk) from [<80023454>] (imx6sl_enter_wait+0x20/0x48)
[<80023434>] (imx6sl_enter_wait) from [<80477c24>] (cpuidle_enter_state+0x44/0xfc)
r4:3c386e48 r3:80023434
[<80477be0>] (cpuidle_enter_state) from [<80477dd8>] (cpuidle_idle_call+0xfc/0x160)
r8:808cf4f8 r7:00000001 r6:80e69534 r5:00000000 r4:bf7df1b8
[<80477cdc>] (cpuidle_idle_call) from [<8000f61c>] (arch_cpu_idle+0x10/0x50)
r9:808c0000 r8:00000000 r7:80921a89 r6:808c8938 r5:808c899c r4:808c0000
[<8000f60c>] (arch_cpu_idle) from [<8006fa94>] (cpu_startup_entry+0x108/0x160)
[<8006f98c>] (cpu_startup_entry) from [<806452ac>] (rest_init+0xb4/0xdc)
r7:808afae0
[<806451f8>] (rest_init) from [<8086fb58>] (start_kernel+0x328/0x38c)
r6:ffffffff r5:808c8880 r4:808c8a30
[<8086f830>] (start_kernel) from [<80008074>] (0x80008074)
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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On imx6qdl, the ENET RMII and PTP clock can come from either internal
ANATOP/CCM or external clock source through pad GPIO_16. But in case
of the external clock source, bit IOMUXC_GPR1[21] needs to be cleared.
The patch adds the support for systems that use an external clock source
and distinguishes above two cases by checking if the PTP clock specified
in device tree is the one coming from the internal ANATOP/CCM.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Since commit (a94f8ec ARM: imx6q: remove board specific CLKO setup),
a number of clk lookups in imx6q clock driver is no longer needed.
Let's remove them.
The cpu0 lookup is also removed since we are now running imx6 cpufreq
driver and looking up clocks from device tree.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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PM subsystem treats mmc card as removed during suspend.
If MMC is used to store the root file system, it is better to tell the kernel
not to treat it as a removable media, so select CONFIG_MMC_UNSAFE_RESUME for
such purpose.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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PM subsystem treats mmc card as removed during suspend.
If MMC is used to store the root file system, it is better to tell the kernel
not to treat it as a removable media, so select CONFIG_MMC_UNSAFE_RESUME for
such purpose.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The imx can support timer-based delays, so implement this.
Skips past jiffy calibration.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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IPG, ARM and MMDC's clock should be enabled during kernel boot up,
so we need to maintain their usecount, otherwise, they may be
disabled unexpectedly if their children's clock are turned off, and
caused their parent PLLs also get disabled, which is incorrect.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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i.MX6SL's suspend in ocram function is derived from i.MX6Q,
it can lower the DDR IO power from ~10mA@1.2V to ~1mA@1.2V,
measured on i.MX6SL EVK board, SH5.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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i.MX6DL's suspend in ocram function is derived from i.MX6Q,
it can lower the DDR IO power from ~26mA@1.5V to ~15mA@1.5V,
measured on i.MX6DL SabreSD board, R25.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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When system enter suspend, we can set the DDR IO to
high-Z state to save DDR IOs' power consumption, this
operation can save many power(from ~26mA@1.5V to ~15mA@1.5V,
measured on i.MX6Q SabreSD board, R25) of DDR IOs. To
achieve that, we need to copy the suspend code to ocram
and run the low level hardware related code(set DDR IOs
to high-Z state) in ocram.
If there is no ocram space available, then system will
still do suspend in external DDR, hence no DDR IOs will
be set to high-Z.
The OCRAM usage layout is as below,
ocram suspend region(4K currently):
======================== high address ======================
.
.
.
^
^
^
imx6_suspend code
PM_INFO structure(imx6_cpu_pm_info)
======================== low address =======================
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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As the i.MX pwm driver is devicetree only, remove the platform
support for this device.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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There should be no duplicate const specifiers for those static
constant character string arrays defined for clock mux options.
Also, the arrays are only taken as the 5th argument for the
imx_clk_mux() function, which is in the type of 'const char
**parents'. So, let's remove the 2nd const specifier right
after 'char'.
This patch fixes these sparse warnings:
arch/arm/mach-imx/clk-vf610.c:66:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:67:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:68:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:69:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:70:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:71:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:72:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:73:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:74:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:75:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:76:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:77:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:78:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:79:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:80:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:81:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:83:25: warning: duplicate const
arch/arm/mach-imx/clk-vf610.c:84:25: warning: duplicate const
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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There should be no duplicate const specifiers for those static
constant character string arrays defined for clock mux options.
Also, the arrays are only taken as the 5th argument for the
imx_clk_mux() function, which is in the type of 'const char
**parents'. So, let's remove the 2nd const specifier right
after 'char'.
This patch fixes these sparse warnings:
arch/arm/mach-imx/clk-imx6sl.c:21:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:22:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:23:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:24:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:25:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:26:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:27:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:28:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:29:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:30:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:31:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:32:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:33:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:34:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:35:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:36:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:37:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:38:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:39:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:40:25: warning: duplicate const
arch/arm/mach-imx/clk-imx6sl.c:41:25: warning: duplicate const
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Move ARCH_HAS_CPUFREQ, ARCH_HAS_OPP and PM_OPP on ARCH_MXC so that
the user can enable the cpufreq support for iMX6Q and/or iMX6SL.
Signed-off-by: John Tobias <john.tobias.ph@gmail.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The eukrea cpuimx35 has a pcf8563 RTC and a LCD gpio regulator.
We enable the respective drivers in order to be able to use theses
features with this configuration.
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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shawn.guo: While at it, we drop 'select PINCTRL' from SOC_IMX35, since
it's been covered by ARCH_MXC.
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: devicetree@vger.kernel.org
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The eukrea mbimxsd51 has a gpio backlight for its
LCD display, so we turn that driver on.
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Add cpuidle support for i.MX6SL, currently only support
two cpuidle levels(ARM wfi and WAIT mode), and add software
workaround for WAIT mode errata as below:
ERR005311 CCM: After exit from WAIT mode, unwanted interrupt(s) taken
during WAIT mode entry process could cause cache memory
corruption.
Software workaround:
To prevent this issue from occurring, software should ensure that
the ARM to IPG clock ratio is less than 12:5 (that is < 2.4x), before
entering WAIT mode.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The reset value of AHB divider is 3, so current AHB rate
is 99MHz which is not correct for kernel, need to ensure
AHB rate is 132MHz in clk driver, as ipg is sourcing from
AHB, and it should be 66MHz by default.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Bit 17 of register CCM_CGPR is called INT_MEM_CLK_LPM as per the mx6
reference manual, so use this name instead.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Let PCI driver be enabled by default.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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- Remove common kconfig options required by multi-platform builds out
of individual platforms as they are redundant.
- Make SMP, CACHE_L2X0 and GPIO config options user visible on
multi-platform builds as most platforms enable these options and all
platforms can run with them enabled.
- Make multi-platform v6 default to more optimal v6k rather than v6
- Remove the last bit of mach-virt and convert it to just a kconfig
option.
Conflicts:
arch/arm/mach-omap2/Kconfig
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Add i2c dts node properties for eDMA support, them depend on the eDMA driver.
Signed-off-by: Yuan Yao <yao.yuan@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This patch adds USBOTG devicetree node of Phytec PCM038 module.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This patch adds USBH2 devicetree node of Phytec PCM970 RDK.
Additionally, adds fixed regulator to provide functionality
without dummy-regulator in the kernel.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This patch adds the missing (Universal serial bus) USB devicetree
nodes for i.MX27 CPUs.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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vf610 has two ADC controllers, and vf610-twr board ADC0_SE5 pin connect
to sliding rheostat for ADC test, other ADC pins connect to connectors for
future use.
Add support for ADC0_SE5.
CC: Jonathan Cameron <jic23@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Otavio Salvador <otavio@ossystems.com.br>
CC: Peter Meerwald <pmeerw@pmeerw.net>
CC: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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