i.MX ProcessorsのトピックRe: Timer & I2C write operation problem with i.MX6Q SabreSD kit https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297582#M37113 <HTML><HEAD></HEAD><BODY><P>The hint is the very first message of your log "clk_enable cannot be called in an interrupt context".</P><P></P><P>So you need to move the clk_enable() to some other place which is not in interrupt context.</P><P></P><P>Regards,</P><P></P><P>Fabio Estevam</P></BODY></HTML> Wed, 16 Apr 2014 11:52:01 GMT fabio_estevam 2014-04-16T11:52:01Z Timer & I2C write operation problem with i.MX6Q SabreSD kit https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297581#M37112 <HTML><HEAD></HEAD><BODY><P>Hi everyone. I'm a beginner at embedded system &amp; linux kernel, using i.MX6Q SabreSD kit for studying. When learing how to use Timer, I have a problem with I2C write operation.</P><P></P><P>- I have an I2C device driver, I setup a timer in <STRONG>probe()</STRONG> function to call my callback function (called "my_timer_callback") after 1 second:</P><P></P><P></P><PRE __default_attr="c++" __jive_macro_name="code" class="_jivemacro_uid_13976381724379807 jive_text_macro jive_macro_code" jivemacro_uid="_13976381724379807"><CODE>setup_timer(&amp;my_timer, my_timer_callback, 0); mod_timer(&amp;my_timer, jiffies + msecs_to_jiffies(1000));</CODE></PRE><P></P><P></P><P>- Inside my callback function, I send 1 byte to reset my I2C slave device &amp; restart my Timer:</P><P></P><P></P><PRE __default_attr="c++" __jive_macro_name="code" class="jive_text_macro jive_macro_code _jivemacro_uid_13976381654815569" jivemacro_uid="_13976381654815569"><CODE>static void my_timer_callback(unsigned long data) { &nbsp;&nbsp;&nbsp;&nbsp; printk(KERN_INFO "----&gt; %s\n", __func__); &nbsp;&nbsp;&nbsp;&nbsp; i2c_smbus_write_byte_data(my_i2c_client, 0x00, 0x00); &nbsp;&nbsp;&nbsp;&nbsp; mod_timer(&amp;my_timer, jiffies + msecs_to_jiffies(1000)); }</CODE></PRE><P></P><P></P><P>- When I boot up the kit with new kernel image, the booting is error &amp; log in minicom looks like this:</P><P></P><PRE __default_attr="c++" __jive_macro_name="code" class="jive_text_macro jive_macro_code _jivemacro_uid_13976381829719820" jivemacro_uid="_13976381829719820" modifiedtitle="true"> <P>...</P> <P>----&gt; my_timer_callback&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>clk_enable cannot be called in an interrupt context&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>[&lt;c00509e4&gt;] (unwind_backtrace+0x0/0x138) from [&lt;c006b408&gt;] (clk_enable+0x88/0x)</P> <P>[&lt;c006b408&gt;] (clk_enable+0x88/0xa0) from [&lt;c03c3fa8&gt;] (i2c_imx_xfer+0x6c/0x75c)</P> <P>[&lt;c03c3fa8&gt;] (i2c_imx_xfer+0x6c/0x75c) from [&lt;c03c19cc&gt;] (i2c_transfer+0xc8/0x1)</P> <P>[&lt;c03c19cc&gt;] (i2c_transfer+0xc8/0x148) from [&lt;c03c1d80&gt;] (i2c_smbus_xfer+0x298/)</P> <P>[&lt;c03c1d80&gt;] (i2c_smbus_xfer+0x298/0x564) from [&lt;c03c22fc&gt;] (i2c_smbus_write_by)</P> <P>[&lt;c03c22fc&gt;] (i2c_smbus_write_byte_data+0x40/0x48) from [&lt;c040335c&gt;] (my_timer_)</P> <P>[&lt;c040335c&gt;] (my_timer_callback+0x68/0xa4) from [&lt;c009812c&gt;] (run_timer_softirq)</P> <P>[&lt;c009812c&gt;] (run_timer_softirq+0x134/0x3e4) from [&lt;c0090478&gt;] (__do_softirq+0x)</P> <P>[&lt;c0090478&gt;] (__do_softirq+0xc8/0x25c) from [&lt;c0090ac0&gt;] (irq_exit+0x98/0xa0)</P> <P>[&lt;c0090ac0&gt;] (irq_exit+0x98/0xa0) from [&lt;c00431b4&gt;] (do_local_timer+0x70/0x90)</P> <P>[&lt;c00431b4&gt;] (do_local_timer+0x70/0x90) from [&lt;c004934c&gt;] (__irq_svc+0x4c/0xe8)</P> <P>Exception stack(0xe6037e28 to 0xe6037e70)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>7e20:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e72f9c18 20000113 000025ed 00000000 e72f9800 e72f99d4</P> <P>7e40: e72f9b40 e72f9c18 20000113 00000000 00000000 00000000 00000004 e6037e70</P> <P>7e60: c043152c c06403e0 40000113 ffffffff&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>[&lt;c004934c&gt;] (__irq_svc+0x4c/0xe8) from [&lt;c06403e0&gt;] (_raw_spin_unlock_irqresto)</P> <P>[&lt;c06403e0&gt;] (_raw_spin_unlock_irqrestore+0x18/0x40) from [&lt;c043152c&gt;] (sdhci_s)</P> <P>[&lt;c043152c&gt;] (sdhci_set_ios+0x284/0x5ec) from [&lt;c0420130&gt;] (mmc_set_bus_mode+0x)</P> <P>[&lt;c0420130&gt;] (mmc_set_bus_mode+0x3c/0x9c) from [&lt;c0426dfc&gt;] (mmc_sdio_init_card)</P> <P>[&lt;c0426dfc&gt;] (mmc_sdio_init_card+0x438/0x570) from [&lt;c0427398&gt;] (mmc_attach_sdi)</P> <P>[&lt;c0427398&gt;] (mmc_attach_sdio+0x94/0x368) from [&lt;c0420ee8&gt;] (mmc_rescan+0x24c/0)</P> <P>[&lt;c0420ee8&gt;] (mmc_rescan+0x24c/0x2ac) from [&lt;c00a3f5c&gt;] (process_one_work+0x12c)</P> <P>[&lt;c00a3f5c&gt;] (process_one_work+0x12c/0x494) from [&lt;c00a4434&gt;] (worker_thread+0x)</P> <P>[&lt;c00a4434&gt;] (worker_thread+0x170/0x3cc) from [&lt;c00a8528&gt;] (kthread+0x80/0x88)</P> <P>[&lt;c00a8528&gt;] (kthread+0x80/0x88) from [&lt;c004a408&gt;] (kernel_thread_exit+0x0/0x8)</P> <P>kernel BUG at arch/arm/plat-mxc/clock.c:101!&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>Unable to handle kernel NULL pointer dereference at virtual address 00000000</P> <P>pgd = c0004000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>[00000000] *pgd=00000000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>Internal error: Oops: 805 [#1] PREEMPT SMP&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>Modules linked in:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>CPU: 0&nbsp;&nbsp;&nbsp; Tainted: G&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; W&nbsp;&nbsp;&nbsp; (3.0.35-g582b0a0-dirty #229)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>PC is at __bug+0x1c/0x28&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>LR is at __bug+0x18/0x28&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>pc : [&lt;c004cfec&gt;]&nbsp;&nbsp;&nbsp; lr : [&lt;c004cfe8&gt;]&nbsp;&nbsp;&nbsp; psr: 20000113&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>sp : e6037c28&nbsp; ip : 00000000&nbsp; fp : 00000001&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>r10: 00000001&nbsp; r9 : ffff8c93&nbsp; r8 : e6037ca8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>r7 : c08dffe8&nbsp; r6 : 00000001&nbsp; r5 : e6037ca8&nbsp; r4 : c08896f0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>r3 : 00000000&nbsp; r2 : c089741c&nbsp; r1 : 60000193&nbsp; r0 : 00000033&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>Flags: nzCv&nbsp; IRQs on&nbsp; FIQs on&nbsp; Mode SVC_32&nbsp; ISA ARM&nbsp; Segment kernel&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>Control: 10c53c7d&nbsp; Table: 1000404a&nbsp; DAC: 00000015&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>PC: 0xc004cf6c:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>cf6c&nbsp; e1a04000 e24dd010 e590003c eb01c3bb e3500000 0594003c 0a00000d e2841034</P> <P>cf8c&nbsp; e594002c e891000e e88d000f ea000003 e59d000c eb01c3b1 e3500000 0a000006</P> <P>cfac&nbsp; e1a0000d eb000d34 e3500000 aafffff7 e3a00000 e28dd010 e8bd8010 e59d000c</P> <P>cfcc&nbsp; eafffffb e92d4008 e1a03000 e1a02001 e59f0010 e1a01003 eb17b2ab e3a03000</P> <P>cfec&nbsp; e5833000 eafffffe c076de8c e30d0ea8 e30012e1 e92d4008 e34c0076 ebfffff0</P> <P>d00c&nbsp; e1a01000 e30d0ec0 e92d4008 e34c0076 eb17b29d e30d0ea8 e30012c5 e34c0076</P> <P>d02c&nbsp; ebffffe7 e92d4008 e1a02000 e1a03001 e30d0ee0 e1a0100e e34c0076 eb17b292</P> <P>d04c&nbsp; e30d0ea8 e3001299 e34c0076 ebffffdc e92d4ff0 e24dd06c e1a06002 e1a08000</P> <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>LR: 0xc004cf68:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P> <P>cf68&nbsp; e92d4010 e1a04000 e24dd010 e590003c eb01c3bb e3500000 0594003c 0a00000d</P> <P>cf88&nbsp; e2841034 e594002c e891000e e88d000f ea000003 e59d000c eb01c3b1 e3500000</P> <P>cfa8&nbsp; 0a000006 e1a0000d eb000d34 e3500000 aafffff7 e3a00000 e28dd010 e8bd8010</P> <P>cfc8&nbsp; e59d000c eafffffb e92d4008 e1a03000 e1a02001 e59f0010 e1a01003 eb17b2ab</P> <P>cfe8&nbsp; e3a03000 e5833000 eafffffe c076de8c e30d0ea8 e30012e1 e92d4008 e34c0076</P> <P>d008&nbsp; ebfffff0 e1a01000 e30d0ec0 e92d4008 e34c0076 eb17b29d e30d0ea8 e30012c5</P> <P>d028&nbsp; e34c0076 ebffffe7 e92d4008 e1a02000 e1a03001 e30d0ee0 e1a0100e e34c0076</P> <P>d048&nbsp; eb17b292 e30d0ea8 e3001299 e34c0076 ebffffdc e92d4ff0 e24dd06c e1a06002</P> <P></P> <P>...</P> </PRE><P></P><P>Please, help me to solve this problem. Thanks.</P></BODY></HTML> Wed, 16 Apr 2014 09:11:14 GMT https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297581#M37112 Steve2k 2014-04-16T09:11:14Z Re: Timer & I2C write operation problem with i.MX6Q SabreSD kit https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297582#M37113 <HTML><HEAD></HEAD><BODY><P>The hint is the very first message of your log "clk_enable cannot be called in an interrupt context".</P><P></P><P>So you need to move the clk_enable() to some other place which is not in interrupt context.</P><P></P><P>Regards,</P><P></P><P>Fabio Estevam</P></BODY></HTML> Wed, 16 Apr 2014 11:52:01 GMT https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297582#M37113 fabio_estevam 2014-04-16T11:52:01Z Re: Timer & I2C write operation problem with i.MX6Q SabreSD kit https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297583#M37114 <HTML><HEAD></HEAD><BODY><P>Hi Fabio,</P><P>I think I've found the <A href="http://stackoverflow.com/questions/18921933/how-an-i2c-read-as-well-as-write-operation-in-handler-function-of-request-thre">reason </A>for this problem. I'll find another solutions supported by Linux kernel.</P><P>Thanks for your reply.</P></BODY></HTML> Wed, 16 Apr 2014 15:08:48 GMT https://community.nxp.com/t5/i-MX-Processors/Timer-I2C-write-operation-problem-with-i-MX6Q-SabreSD-kit/m-p/297583#M37114 Steve2k 2014-04-16T15:08:48Z