Re: [PATCH v6 2/4] iio: adc: Add Xilinx AMS driver

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Hi Anand,

url:    https://github.com/0day-ci/linux/commits/Anand-Ashok-Dumbre/Add-Xilinx-AMS-Driver/20210625-023047
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: microblaze-randconfig-m031-20210628 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

smatch warnings:
drivers/iio/adc/xilinx-ams.c:406 ams_enable_channel_sequence() warn: should '(((1))) << (indio_dev->channels[i]->scan_index)' be a 64 bit type?
drivers/iio/adc/xilinx-ams.c:1126 ams_init_module() error: uninitialized symbol 'chan_node'.

vim +406 drivers/iio/adc/xilinx-ams.c

fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  392  static void ams_enable_channel_sequence(struct iio_dev *indio_dev)
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  393  {
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  394  	int i;
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  395  	unsigned long long scan_mask;
                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  396  	struct ams *ams = iio_priv(indio_dev);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  397  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  398  	/*
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  399  	 * Enable channel sequence. First 22 bits of scan_mask represent
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  400  	 * PS channels, and next remaining bits represent PL channels.
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  401  	 */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  402  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  403  	/* Run calibration of PS & PL as part of the sequence */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  404  	scan_mask = 0x1 | BIT(AMS_PS_SEQ_MAX);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  405  	for (i = 0; i < indio_dev->num_channels; i++)
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24 @406  		scan_mask |= BIT(indio_dev->channels[i].scan_index);

Since scan_mask is ull should we use BIT_ULL() instead of BIT()?

(I haven't look at the context outside of this email so I don't know
the value of indio_dev->num_channels).

fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  407  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  408  	if (ams->ps_base) {
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  409  		/* put sysmon in a soft reset to change the sequence */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  410  		ams_ps_update_reg(ams, AMS_REG_CONFIG1, AMS_CONF1_SEQ_MASK,
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  411  				  AMS_CONF1_SEQ_DEFAULT);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  412  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  413  		/* configure basic channels */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  414  		writel(scan_mask & AMS_REG_SEQ0_MASK,
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  415  		       ams->ps_base + AMS_REG_SEQ_CH0);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  416  		writel(AMS_REG_SEQ2_MASK &
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  417  		       (scan_mask >> AMS_REG_SEQ2_MASK_SHIFT),
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  418  		       ams->ps_base + AMS_REG_SEQ_CH2);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  419  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  420  		/* set continuous sequence mode */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  421  		ams_ps_update_reg(ams, AMS_REG_CONFIG1, AMS_CONF1_SEQ_MASK,
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  422  				  AMS_CONF1_SEQ_CONTINUOUS);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  423  	}
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  424  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  425  	if (ams->pl_base) {
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  426  		/* put sysmon in a soft reset to change the sequence */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  427  		ams_pl_update_reg(ams, AMS_REG_CONFIG1, AMS_CONF1_SEQ_MASK,
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  428  				  AMS_CONF1_SEQ_DEFAULT);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  429  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  430  		/* configure basic channels */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  431  		scan_mask = scan_mask >> AMS_PS_SEQ_MAX;
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  432  		writel(scan_mask & AMS_REG_SEQ0_MASK,
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  433  		       ams->pl_base + AMS_REG_SEQ_CH0);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  434  		writel(AMS_REG_SEQ2_MASK &
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  435  		       (scan_mask >> AMS_REG_SEQ2_MASK_SHIFT),
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  436  		       ams->pl_base + AMS_REG_SEQ_CH2);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  437  		writel(AMS_REG_SEQ1_MASK &
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  438  		       (scan_mask >> AMS_REG_SEQ1_MASK_SHIFT),
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  439  		       ams->pl_base + AMS_REG_SEQ_CH1);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  440  
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  441  		/* set continuous sequence mode */
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  442  		ams_pl_update_reg(ams, AMS_REG_CONFIG1, AMS_CONF1_SEQ_MASK,
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  443  				  AMS_CONF1_SEQ_CONTINUOUS);
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  444  	}
fa0ea7aaf7a9bf Anand Ashok Dumbre 2021-06-24  445  }

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx




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