I'm using kernel 4.1.13
uname output:
Linux bbbi-ohl-1 4.1.13-ti-r30 #1 SMP PREEMPT Fri Nov 13 21:54:17 UTC 2015
armv7l GNU/Linux
Is there a way to disable logging?
Still don't know who is setting the clock back to 16MHz.
The capemgr?
Am Mittwoch, 28. März 2018 20:25:08 UTC+2 schrieb Wulf Man:
>
> what version kernel are you using. 4.9 had logging turned on and it made a
> lot of noise
>
> On 3/28/2018 5:56 AM, joerg...@ims.fraunhofer.de <javascript:> wrote:
>
> Hi,
> I'm trying to use the spi device on my beaglebone black with a C program.
> For setup I use something like:
>
> uint8_t SPImode |= SPI_CPOL;
> uint8_t bits = 8;
> uint16_t delay = 0;
> uint32_t speed = 500000;
> fd = open("spidev1.0", O_RDWR);
> ret = ioctl(fd, SPI_IOC_WR_MODE, &SPImode);
>
> ret = ioctl(fd, SPI_IOC_RD_MODE, &SPImode);
>
> ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
>
> ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
>
> ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
>
> ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
>
> For transfer I use something like:
>
> struct spi_ioc_transfer tr = {
> .tx_buf = (unsigned long)dataWrite,
> .rx_buf = (unsigned long)dataRead,
> .len = len,
> .delay_usecs = 0,
> .speed_hz = 500000,
> .bits_per_word = 8,
> };
>
> ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
>
> Unfortunately my log files (syslog, kern.log, debug) gets flooded with SPI
> messages:
>
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393284] spidev spi1.0: setup:
> speed 500000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393337] spidev spi1.0: setup:
> speed 16000000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393440] spidev spi1.0: setup:
> speed 500000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393492] spidev spi1.0: setup:
> speed 16000000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.394007] spidev spi1.0: setup:
> speed 500000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.394062] spidev spi1.0: setup:
> speed 16000000, sample trailing edge, clk normal
>
> Looks like somebody tries to reset the SPI clock to the maximum of 16 MHz?
> And the SPI driver logs everthing in each log file.
> Somebody knows a solution for this?
> Because my flash gets filled in just a few seconds :-(
>
>
>
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