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@erwango erwango commented Nov 6, 2019

Update shield description and sample to allow testing of LIS3MDL
sensor IRQ pin.
Update sample yaml file to state dependency on arduino_gpio.
Additionally, fix redundant line in sample yaml

Signed-off-by: Erwan Gouriou erwan.gouriou@linaro.org

galak and others added 5 commits November 5, 2019 09:13
Update lis3mdl-magn dts binding to include GPIO interrupt pin and change
driver code to get the GPIO pin and controller info from DT instead of
Kconfig.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
No need to cast dev in  k_thread_create.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Update shield description and sample to allow testing of LIS3MDL
sensor IRQ pin.  Additionaly fix redundant line in sample yaml

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Update shield description and sample to allow testing of LIS3MDL
sensor IRQ pin.
Update sample yaml file to state dependency on arduino_gpio.
Additionally, fix redundant line in sample yaml

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
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erwango commented Nov 6, 2019

Should have not tried to merge online, sorry,

Well you got the point..

@galak galak force-pushed the dt-gpio-st-lis3mdl-magn branch from b5476ca to 85cce80 Compare November 6, 2019 10:30
@galak galak merged this pull request into galak:dt-gpio-st-lis3mdl-magn Nov 6, 2019
@erwango erwango deleted the pr/20343 branch June 5, 2020 10:13
galak pushed a commit that referenced this pull request Jun 22, 2020
This makes the gatt metrics also available for
gatt write-without-rsp-cb so it now prints the rate of each write:

uart:~$ gatt write-without-response-cb 1e ff 10 10
Write #1: 16 bytes (0 bps)
Write #2: 32 bytes (3445948416 bps)
Write #3: 48 bytes (2596929536 bps)
Write #4: 64 bytes (6400 bps)
Write #5: 80 bytes (8533 bps)
Write #6: 96 bytes (10666 bps)
Write #7: 112 bytes (8533 bps)
Write zephyrproject-rtos#8: 128 bytes (9955 bps)
Write zephyrproject-rtos#9: 144 bytes (11377 bps)
Write zephyrproject-rtos#10: 160 bytes (7680 bps)
Write zephyrproject-rtos#11: 176 bytes (8533 bps)
Write zephyrproject-rtos#12: 192 bytes (9386 bps)
Write Complete (err 0)
Write zephyrproject-rtos#13: 208 bytes (8533 bps)
Write zephyrproject-rtos#14: 224 bytes (9244 bps)
Write zephyrproject-rtos#15: 240 bytes (9955 bps)
Write zephyrproject-rtos#16: 256 bytes (8000 bps)

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
galak pushed a commit that referenced this pull request Nov 17, 2020
The _ldiv5() is an optimized divide-by-5 function that is smaller and
faster than the generic libgcc implementation.

Yet it can be made even smaller and faster with this replacement
implementation based on a reciprocal multiplication plus some tricks.

For example, here's the assembly from the original code on ARM:

_ldiv5:
        ldr     r3, [r0]
        movw    ip, zephyrproject-rtos#52429
        ldr     r1, [r0, #4]
        movt    ip, 52428
        adds    r3, r3, #2
        push    {r4, r5, r6, r7, lr}
        mov     lr, #0
        adc     r1, r1, lr
        adds    r2, lr, lr
        umull   r7, r6, ip, r1
        lsr     r6, r6, #2
        adc     r7, r6, r6
        adds    r2, r2, r2
        adc     r7, r7, r7
        adds    r2, r2, lr
        adc     r7, r7, r6
        subs    r3, r3, r2
        sbc     r7, r1, r7
        lsr     r2, r3, #3
        orr     r2, r2, r7, lsl zephyrproject-rtos#29
        umull   r2, r1, ip, r2
        lsr     r2, r1, #2
        lsr     r7, r1, zephyrproject-rtos#31
        lsl     r1, r2, #3
        adds    r4, lr, r1
        adc     r5, r6, r7
        adds    r2, r1, r1
        adds    r2, r2, r2
        adds    r2, r2, r1
        subs    r2, r3, r2
        umull   r3, r2, ip, r2
        lsr     r2, r2, #2
        adds    r4, r4, r2
        adc     r5, r5, #0
        strd    r4, [r0]
        pop     {r4, r5, r6, r7, pc}

And here's the resulting assembly with this commit applied:

_ldiv5:
        push    {r4, r5, r6, r7}
        movw    r4, zephyrproject-rtos#13107
        ldr     r6, [r0]
        movt    r4, 13107
        ldr     r1, [r0, #4]
        mov     r3, #0
        umull   r6, r7, r6, r4
        add     r2, r4, r4, lsl #1
        umull   r4, r5, r1, r4
        adds    r1, r6, r2
        adc     r2, r7, r2
        adds    ip, r6, r4
        adc     r1, r7, r5
        adds    r2, ip, r2
        adc     r2, r1, r3
        adds    r2, r4, r2
        adc     r3, r5, r3
        strd    r2, [r0]
        pop     {r4, r5, r6, r7}
        bx      lr

So we're down to 20 instructions from 36 initially, with only 2 umull
instructions instead of 3, and slightly smaller stack footprint.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
galak pushed a commit that referenced this pull request Jan 25, 2021
With classic volatile pointer access gcc something generates
access instructions with immediate offset value, like

str     w4, [x1], #4

Such instructions produce invalid syndrome in HSR register when are
trapped by hypervisor. This leads to inability to emulate device access
in hypervisor.

So we need to make sure that any access to device memory is done
with plain str/ldr instructions without offset.

Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
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2 participants