tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: ba2fc167e9447596a812e828842d0130ea9cd0e4 spi: altera: Add DFL bus driver for Altera API Controller date: 7 months ago config: m68k-randconfig-s031-20211109 (attached as .config) compiler: m68k-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout ba2fc167e9447596a812e828842d0130ea9cd0e4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/spi/spi-altera-dfl.c:52:30: sparse: expected void [noderef] __iomem *base drivers/spi/spi-altera-dfl.c:52:30: sparse: got void *context drivers/spi/spi-altera-dfl.c:78:30: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] __iomem *base @@ got void *context @@ drivers/spi/spi-altera-dfl.c:78:30: sparse: expected void [noderef] __iomem *base drivers/spi/spi-altera-dfl.c:78:30: sparse: got void *context drivers/spi/spi-altera-dfl.c:161:22: sparse: expected void *bus_context drivers/spi/spi-altera-dfl.c:161:22: sparse: got void [noderef] __iomem *[assigned] base vim +52 drivers/spi/spi-altera-dfl.c 48 49 static int indirect_bus_reg_read(void *context, unsigned int reg, 50 unsigned int *val) 51 { 53 int loops; 54 u64 v; 55 56 writeq((reg >> 2) | INDIRECT_RD, base + INDIRECT_ADDR); 57 58 loops = 0; 59 while ((readq(base + INDIRECT_ADDR) & INDIRECT_RD) && 60 (loops++ < INDIRECT_TIMEOUT)) 61 cpu_relax(); 62 63 if (loops >= INDIRECT_TIMEOUT) { 64 pr_err("%s timed out %d\n", __func__, loops); 65 return -ETIME; 66 } 67 68 v = readq(base + INDIRECT_RD_DATA); 69 70 *val = v & INDIRECT_DATA_MASK; 71 72 return 0; 73 } 74 75 static int indirect_bus_reg_write(void *context, unsigned int reg, 76 unsigned int val) 77 { 78 void __iomem *base = context; 79 int loops; 80 81 writeq(val, base + INDIRECT_WR_DATA); 82 writeq((reg >> 2) | INDIRECT_WR, base + INDIRECT_ADDR); 83 84 loops = 0; 85 while ((readq(base + INDIRECT_ADDR) & INDIRECT_WR) && 86 (loops++ < INDIRECT_TIMEOUT)) 87 cpu_relax(); 88 89 if (loops >= INDIRECT_TIMEOUT) { 90 pr_err("%s timed out %d\n", __func__, loops); 91 return -ETIME; 92 } 93 return 0; 94 } 95 96 static const struct regmap_config indirect_regbus_cfg = { 97 .reg_bits = 32, 98 .reg_stride = 4, 99 .val_bits = 32, 100 .fast_io = true, 101 .max_register = 24, 102 103 .reg_write = indirect_bus_reg_write, 104 .reg_read = indirect_bus_reg_read, 105 }; 106 107 static struct spi_board_info m10_bmc_info = { 108 .modalias = "m10-d5005", 109 .max_speed_hz = 12500000, 110 .bus_num = 0, 111 .chip_select = 0, 112 }; 113 114 static void config_spi_master(void __iomem *base, struct spi_master *master) 115 { 116 u64 v; 117 118 v = readq(base + SPI_CORE_PARAMETER); 119 120 master->mode_bits = SPI_CS_HIGH; 121 if (FIELD_GET(CLK_POLARITY, v)) 122 master->mode_bits |= SPI_CPOL; 123 if (FIELD_GET(CLK_PHASE, v)) 124 master->mode_bits |= SPI_CPHA; 125 126 master->num_chipselect = FIELD_GET(NUM_CHIPSELECT, v); 127 master->bits_per_word_mask = 128 SPI_BPW_RANGE_MASK(1, FIELD_GET(DATA_WIDTH, v)); 129 } 130 131 static int dfl_spi_altera_probe(struct dfl_device *dfl_dev) 132 { 133 struct device *dev = &dfl_dev->dev; 134 struct spi_master *master; 135 struct altera_spi *hw; 136 void __iomem *base; 137 int err = -ENODEV; 138 139 master = spi_alloc_master(dev, sizeof(struct altera_spi)); 140 if (!master) 141 return -ENOMEM; 142 143 master->bus_num = dfl_dev->id; 144 145 hw = spi_master_get_devdata(master); 146 147 hw->dev = dev; 148 149 base = devm_ioremap_resource(dev, &dfl_dev->mmio_res); 150 151 if (IS_ERR(base)) { 152 dev_err(dev, "%s get mem resource fail!\n", __func__); 153 return PTR_ERR(base); 154 } 155 156 config_spi_master(base, master); 157 dev_dbg(dev, "%s cs %u bpm 0x%x mode 0x%x\n", __func__, 158 master->num_chipselect, master->bits_per_word_mask, 159 master->mode_bits); 160 162 if (IS_ERR(hw->regmap)) 163 return PTR_ERR(hw->regmap); 164 165 hw->irq = -EINVAL; 166 167 altera_spi_init_master(master); 168 169 err = devm_spi_register_master(dev, master); 170 if (err) { 171 dev_err(dev, "%s failed to register spi master %d\n", __func__, err); 172 goto exit; 173 } 174 175 if (!spi_new_device(master, &m10_bmc_info)) { 176 dev_err(dev, "%s failed to create SPI device: %s\n", 177 __func__, m10_bmc_info.modalias); 178 } 179 180 return 0; 181 exit: 182 spi_master_put(master); 183 return err; 184 } 185 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org