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SubjectRe: [PATCH] i2c: imx: add slave support
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Date
Thank you for testing our patch.

Due to using the generic slave interface, It should be enabled in the
config file.
Please add the following in the config file:
CONFIG_I2C_SLAVE=y



On 25.01.2016 21:09, kbuild test robot wrote:
> Hi Dmitriy,
>
> [auto build test ERROR on wsa/i2c/for-next]
> [also build test ERROR on v4.5-rc1 next-20160125]
> [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
>
> url: https://github.com/0day-ci/linux/commits/Dmitriy-Baranov/i2c-imx-add-slave-support/20160125-225538
> base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux i2c/for-next
> config: arm-imx_v6_v7_defconfig (attached as .config)
> reproduce:
> wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> make.cross ARCH=arm
>
> All error/warnings (new ones prefixed by >>):
>
> drivers/i2c/busses/i2c-imx.c: In function 'i2c_imx_slave_threadfn':
>>> drivers/i2c/busses/i2c-imx.c:696:6: error: implicit declaration of function 'i2c_slave_event' [-Werror=implicit-function-declaration]
> i2c_slave_event(i2c_imx->slave,
> ^
>>> drivers/i2c/busses/i2c-imx.c:697:7: error: 'I2C_SLAVE_READ_REQUESTED' undeclared (first use in this function)
> I2C_SLAVE_READ_REQUESTED, &data);
> ^
> drivers/i2c/busses/i2c-imx.c:697:7: note: each undeclared identifier is reported only once for each function it appears in
>>> drivers/i2c/busses/i2c-imx.c:706:7: error: 'I2C_SLAVE_WRITE_REQUESTED' undeclared (first use in this function)
> I2C_SLAVE_WRITE_REQUESTED, &data);
> ^
>>> drivers/i2c/busses/i2c-imx.c:719:8: error: 'I2C_SLAVE_READ_PROCESSED' undeclared (first use in this function)
> I2C_SLAVE_READ_PROCESSED, &data);
> ^
>>> drivers/i2c/busses/i2c-imx.c:744:7: error: 'I2C_SLAVE_WRITE_RECEIVED' undeclared (first use in this function)
> I2C_SLAVE_WRITE_RECEIVED, &data);
> ^
>>> drivers/i2c/busses/i2c-imx.c:755:37: error: 'I2C_SLAVE_STOP' undeclared (first use in this function)
> i2c_slave_event(i2c_imx->slave, I2C_SLAVE_STOP, &data);
> ^
> drivers/i2c/busses/i2c-imx.c: At top level:
>>> drivers/i2c/busses/i2c-imx.c:1283:2: error: unknown field 'reg_slave' specified in initializer
> .reg_slave = i2c_imx_reg_slave,
> ^
>>> drivers/i2c/busses/i2c-imx.c:1283:2: warning: excess elements in struct initializer
> drivers/i2c/busses/i2c-imx.c:1283:2: warning: (near initialization for 'i2c_imx_algo')
>>> drivers/i2c/busses/i2c-imx.c:1284:2: error: unknown field 'unreg_slave' specified in initializer
> .unreg_slave = i2c_imx_unreg_slave,
> ^
> drivers/i2c/busses/i2c-imx.c:1284:2: warning: excess elements in struct initializer
> drivers/i2c/busses/i2c-imx.c:1284:2: warning: (near initialization for 'i2c_imx_algo')
> cc1: some warnings being treated as errors
>
> vim +/i2c_slave_event +696 drivers/i2c/busses/i2c-imx.c
>
> 690 status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
> 691 ctl = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);
> 692
> 693 if (status & I2SR_IAAS) {
> 694 if (status & I2SR_SRW) {
> 695 /* master wants to read from us */
> > 696 i2c_slave_event(i2c_imx->slave,
> > 697 I2C_SLAVE_READ_REQUESTED, &data);
> 698 ctl |= I2CR_MTX;
> 699 imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
> 700
> 701 /*send data */
> 702 imx_i2c_write_reg(data, i2c_imx, IMX_I2C_I2DR);
> 703 } else {
> 704 dev_dbg(&i2c_imx->adapter.dev, "write requested");
> 705 i2c_slave_event(i2c_imx->slave,
> > 706 I2C_SLAVE_WRITE_REQUESTED, &data);
> 707 /*slave receive */
> 708 ctl &= ~I2CR_MTX;
> 709 imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
> 710
> 711 /*dummy read */
> 712 data = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
> 713 }
> 714 } else {
> 715 /* slave send */
> 716 if (ctl & I2CR_MTX) {
> 717 if (!(status & I2SR_RXAK)) { /*ACK received */
> 718 i2c_slave_event(i2c_imx->slave,
> > 719 I2C_SLAVE_READ_PROCESSED, &data);
> 720 ctl |= I2CR_MTX;
> 721 imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
> 722 /*send data */
> 723 imx_i2c_write_reg(data, i2c_imx, IMX_I2C_I2DR);
> 724 } else {
> 725 /*no ACK. */
> 726 /*dummy read */
> 727 dev_dbg(&i2c_imx->adapter.dev, "read requested");
> 728 i2c_slave_event(i2c_imx->slave,
> 729 I2C_SLAVE_READ_REQUESTED, &data);
> 730
> 731 ctl &= ~I2CR_MTX;
> 732 imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
> 733 imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
> 734 }
> 735 } else { /*read */
> 736 ctl &= ~I2CR_MTX;
> 737 imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
> 738
> 739 /*read */
> 740 data = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
> 741 dev_dbg(&i2c_imx->adapter.dev, "received %x",
> 742 (unsigned int) data);
> 743 i2c_slave_event(i2c_imx->slave,
> > 744 I2C_SLAVE_WRITE_RECEIVED, &data);
> 745 }
> 746 }
> 747 }
> 748
> 749 if (atomic_read(&i2c_imx->slave_state) == I2C_IMX_SLAVE_POLLING) {
> 750 udelay(50);
> 751 status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
> 752
> 753 if ((status & I2SR_IBB) == 0) {
> 754 pr_debug("end of package");
> > 755 i2c_slave_event(i2c_imx->slave, I2C_SLAVE_STOP, &data);
> 756 atomic_set(&i2c_imx->slave_state, I2C_IMX_SLAVE_IDLE);
> 757 timeout = HZ;
> 758 }
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation

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