[PATCH v2 3/3] mailbox: sophgo: add mailbox driver for cv18x SoCs

[kernel test robot]

Hi Yuntao,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.10 next-20240715]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yuntao-Dai/dt-bindings-mailbox-add-Sophgo-cv18x-SoCs-mailbox/20240715-003952
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/SYBP282MB2238F93565D20F0A5F3EEB6BC4A02%40SYBP282MB2238.AUSP282.PROD.OUTLOOK.COM
patch subject: [PATCH v2 3/3] mailbox: sophgo: add mailbox driver for cv18x SoCs
config: powerpc-randconfig-r113-20240715 (https://download.01.org/0day-ci/archive/20240715/202407151649.ExTr3xXL-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 14.1.0
reproduce: (https://download.01.org/0day-ci/archive/20240715/202407151649.ExTr3xXL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407151649.ExTr3xXL-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/mailbox/cv1800-mailbox.c:56:62: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void *data @@     got unsigned long long [noderef] [usertype] __iomem * @@
   drivers/mailbox/cv1800-mailbox.c:56:62: sparse:     expected void *data
   drivers/mailbox/cv1800-mailbox.c:56:62: sparse:     got unsigned long long [noderef] [usertype] __iomem *
>> drivers/mailbox/cv1800-mailbox.c:78:25: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/mailbox/cv1800-mailbox.c:78:22: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned long long [noderef] [usertype] __iomem *addr @@     got unsigned long long [usertype] * @@
   drivers/mailbox/cv1800-mailbox.c:78:22: sparse:     expected unsigned long long [noderef] [usertype] __iomem *addr
   drivers/mailbox/cv1800-mailbox.c:78:22: sparse:     got unsigned long long [usertype] *
   drivers/mailbox/cv1800-mailbox.c:102:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/mailbox/cv1800-mailbox.c:102:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned long long [noderef] [usertype] __iomem *addr @@     got unsigned long long [usertype] * @@
   drivers/mailbox/cv1800-mailbox.c:102:14: sparse:     expected unsigned long long [noderef] [usertype] __iomem *addr
   drivers/mailbox/cv1800-mailbox.c:102:14: sparse:     got unsigned long long [usertype] *

vim +56 drivers/mailbox/cv1800-mailbox.c

    47	
    48	static irqreturn_t cv1800_mbox_isr(int irq, void *dev_id)
    49	{
    50		struct cv1800_mbox *mbox = (struct cv1800_mbox *)dev_id;
    51		size_t i;
    52	
    53		for (i = 0; i < MAILBOX_MAX_CHAN; i++) {
    54			if (mbox->content[i] && mbox->chans[i].cl) {
    55				mbox_chan_received_data(&mbox->chans[i],
  > 56							mbox->content[i]);
    57				mbox->content[i] = NULL;
    58				return IRQ_HANDLED;
    59			}
    60		}
    61		return IRQ_NONE;
    62	}
    63	
    64	static irqreturn_t cv1800_mbox_irq(int irq, void *dev_id)
    65	{
    66		struct cv1800_mbox *mbox = (struct cv1800_mbox *)dev_id;
    67		u64 __iomem *addr;
    68		u8 set, valid;
    69		size_t i;
    70	
    71		set = readb(mbox->mbox_base + MBOX_SET_INT_REG(RECV_CPU));
    72	
    73		if (!set)
    74			return IRQ_NONE;
    75	
    76		for (i = 0; i < MAILBOX_MAX_CHAN; i++) {
    77			valid = set & (1 << i);
  > 78			addr = (u64 *)(mbox->mbox_base + MAILBOX_CONTEXT_OFFSET) + i;
    79			if (valid) {
    80				mbox->content[i] = addr;
    81				writeb(valid,
    82				       mbox->mbox_base + MBOX_SET_CLR_REG(RECV_CPU));
    83				writeb(~valid, mbox->mbox_base + MBOX_EN_REG(RECV_CPU));
    84				return IRQ_WAKE_THREAD;
    85			}
    86		}
    87	
    88		return IRQ_NONE;
    89	}
    90	

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