drivers/pinctrl/sunplus/sppctl.c:176: warning: Function parameter or member 'pctl' not described in 'sppctl_func_set'

From: kernel test robot
Date: Mon Oct 02 2023 - 01:37:37 EST

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Hi Qin,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8a749fd1a8720d4619c91c8b6e7528c0a355c0aa
commit: 0aa94eea8d955c82014e5368a843da93f1dc58f8 ARM: sunplus: Add initial support for Sunplus SP7021 SoC
date: 1 year, 3 months ago
config: arm-defconfig (https://download.01.org/0day-ci/archive/20231002/202310021357.ge6TB5iz-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231002/202310021357.ge6TB5iz-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310021357.ge6TB5iz-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/pinctrl/sunplus/sppctl.c:176: warning: Function parameter or member 'pctl' not described in 'sppctl_func_set'
>> drivers/pinctrl/sunplus/sppctl.c:176: warning: Function parameter or member 'func' not described in 'sppctl_func_set'
>> drivers/pinctrl/sunplus/sppctl.c:176: warning: Function parameter or member 'val' not described in 'sppctl_func_set'
>> drivers/pinctrl/sunplus/sppctl.c:229: warning: Function parameter or member 'pctl' not described in 'sppctl_gmx_set'
>> drivers/pinctrl/sunplus/sppctl.c:229: warning: Function parameter or member 'reg_off' not described in 'sppctl_gmx_set'
>> drivers/pinctrl/sunplus/sppctl.c:229: warning: Function parameter or member 'bit_off' not described in 'sppctl_gmx_set'
>> drivers/pinctrl/sunplus/sppctl.c:229: warning: Function parameter or member 'bit_sz' not described in 'sppctl_gmx_set'
>> drivers/pinctrl/sunplus/sppctl.c:229: warning: Function parameter or member 'val' not described in 'sppctl_gmx_set'
>> drivers/pinctrl/sunplus/sppctl.c:262: warning: Function parameter or member 'chip' not described in 'sppctl_first_get'
>> drivers/pinctrl/sunplus/sppctl.c:262: warning: Function parameter or member 'offset' not described in 'sppctl_first_get'
>> drivers/pinctrl/sunplus/sppctl.c:297: warning: Function parameter or member 'chip' not described in 'sppctl_master_get'
>> drivers/pinctrl/sunplus/sppctl.c:297: warning: Function parameter or member 'offset' not described in 'sppctl_master_get'
>> drivers/pinctrl/sunplus/sppctl.c:699: warning: Function parameter or member 'offset' not described in 'sppctl_fully_pinmux_conv'

vim +176 drivers/pinctrl/sunplus/sppctl.c

aa74c44be19c8b Wells Lu 2022-01-16 149
aa74c44be19c8b Wells Lu 2022-01-16 150 /**
aa74c44be19c8b Wells Lu 2022-01-16 151 * sppctl_func_set() - Set pin of fully-pinmux function.
aa74c44be19c8b Wells Lu 2022-01-16 152 *
aa74c44be19c8b Wells Lu 2022-01-16 153 * Mask-fields and control-fields of fully-pinmux function of SP7021 are
aa74c44be19c8b Wells Lu 2022-01-16 154 * arranged as shown below:
aa74c44be19c8b Wells Lu 2022-01-16 155 *
aa74c44be19c8b Wells Lu 2022-01-16 156 * func# | register | mask-field | control-field
aa74c44be19c8b Wells Lu 2022-01-16 157 * -------+----------+--------------+---------------
aa74c44be19c8b Wells Lu 2022-01-16 158 * 0 | base[0] | (22 : 16) | ( 6 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 159 * 1 | base[0] | (30 : 24) | (14 : 8)
aa74c44be19c8b Wells Lu 2022-01-16 160 * 2 | base[1] | (22 : 16) | ( 6 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 161 * 3 | baeg[1] | (30 : 24) | (14 : 8)
aa74c44be19c8b Wells Lu 2022-01-16 162 * : | : | : | :
aa74c44be19c8b Wells Lu 2022-01-16 163 *
aa74c44be19c8b Wells Lu 2022-01-16 164 * where mask-fields are used to protect control-fields from write-in
aa74c44be19c8b Wells Lu 2022-01-16 165 * accidentally. Set the corresponding bits in the mask-field before
aa74c44be19c8b Wells Lu 2022-01-16 166 * you write a value into a control-field.
aa74c44be19c8b Wells Lu 2022-01-16 167 *
aa74c44be19c8b Wells Lu 2022-01-16 168 * Control-fields are used to set where the function pin is going to
aa74c44be19c8b Wells Lu 2022-01-16 169 * be routed to.
aa74c44be19c8b Wells Lu 2022-01-16 170 *
aa74c44be19c8b Wells Lu 2022-01-16 171 * Note that mask-fields and control-fields of even number of 'func'
aa74c44be19c8b Wells Lu 2022-01-16 172 * are located at bits (22:16) and (6:0), while odd number of 'func's
aa74c44be19c8b Wells Lu 2022-01-16 173 * are located at bits (30:24) and (14:8).
aa74c44be19c8b Wells Lu 2022-01-16 174 */
aa74c44be19c8b Wells Lu 2022-01-16 175 static void sppctl_func_set(struct sppctl_pdata *pctl, u8 func, u8 val)
aa74c44be19c8b Wells Lu 2022-01-16 @176 {
aa74c44be19c8b Wells Lu 2022-01-16 177 u32 reg, offset;
aa74c44be19c8b Wells Lu 2022-01-16 178
aa74c44be19c8b Wells Lu 2022-01-16 179 /*
aa74c44be19c8b Wells Lu 2022-01-16 180 * Note that upper 16-bit word are mask-fields and lower 16-bit
aa74c44be19c8b Wells Lu 2022-01-16 181 * word are the control-fields. Set corresponding bits in mask-
aa74c44be19c8b Wells Lu 2022-01-16 182 * field before write to a control-field.
aa74c44be19c8b Wells Lu 2022-01-16 183 */
aa74c44be19c8b Wells Lu 2022-01-16 184 reg = SPPCTL_FULLY_PINMUX_MASK_MASK | val;
aa74c44be19c8b Wells Lu 2022-01-16 185
aa74c44be19c8b Wells Lu 2022-01-16 186 /*
aa74c44be19c8b Wells Lu 2022-01-16 187 * MUXF_L2SW_CLK_OUT is the first fully-pinmux pin
aa74c44be19c8b Wells Lu 2022-01-16 188 * and its register offset is 0.
aa74c44be19c8b Wells Lu 2022-01-16 189 */
aa74c44be19c8b Wells Lu 2022-01-16 190 func -= MUXF_L2SW_CLK_OUT;
aa74c44be19c8b Wells Lu 2022-01-16 191
aa74c44be19c8b Wells Lu 2022-01-16 192 /*
aa74c44be19c8b Wells Lu 2022-01-16 193 * Check if 'func' is an odd number or not. Mask and control-
aa74c44be19c8b Wells Lu 2022-01-16 194 * fields of odd number 'func' is located at upper portion of
aa74c44be19c8b Wells Lu 2022-01-16 195 * a register. Extra shift is needed.
aa74c44be19c8b Wells Lu 2022-01-16 196 */
aa74c44be19c8b Wells Lu 2022-01-16 197 if (func & BIT(0))
aa74c44be19c8b Wells Lu 2022-01-16 198 reg <<= SPPCTL_FULLY_PINMUX_UPPER_SHIFT;
aa74c44be19c8b Wells Lu 2022-01-16 199
aa74c44be19c8b Wells Lu 2022-01-16 200 /* Convert func# to register offset w.r.t. base register. */
aa74c44be19c8b Wells Lu 2022-01-16 201 offset = func * 2;
aa74c44be19c8b Wells Lu 2022-01-16 202 offset &= GENMASK(31, 2);
aa74c44be19c8b Wells Lu 2022-01-16 203
aa74c44be19c8b Wells Lu 2022-01-16 204 writel(reg, pctl->moon2_base + offset);
aa74c44be19c8b Wells Lu 2022-01-16 205 }
aa74c44be19c8b Wells Lu 2022-01-16 206
aa74c44be19c8b Wells Lu 2022-01-16 207 /**
aa74c44be19c8b Wells Lu 2022-01-16 208 * sppctl_gmx_set() - Set pin of group-pinmux.
aa74c44be19c8b Wells Lu 2022-01-16 209 *
aa74c44be19c8b Wells Lu 2022-01-16 210 * Mask-fields and control-fields of group-pinmux function of SP7021 are
aa74c44be19c8b Wells Lu 2022-01-16 211 * arranged as shown below:
aa74c44be19c8b Wells Lu 2022-01-16 212 *
aa74c44be19c8b Wells Lu 2022-01-16 213 * register | mask-fields | control-fields
aa74c44be19c8b Wells Lu 2022-01-16 214 * ----------+--------------+----------------
aa74c44be19c8b Wells Lu 2022-01-16 215 * base[0] | (31 : 16) | (15 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 216 * base[1] | (31 : 24) | (15 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 217 * base[2] | (31 : 24) | (15 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 218 * : | : | :
aa74c44be19c8b Wells Lu 2022-01-16 219 *
aa74c44be19c8b Wells Lu 2022-01-16 220 * where mask-fields are used to protect control-fields from write-in
aa74c44be19c8b Wells Lu 2022-01-16 221 * accidentally. Set the corresponding bits in the mask-field before
aa74c44be19c8b Wells Lu 2022-01-16 222 * you write a value into a control-field.
aa74c44be19c8b Wells Lu 2022-01-16 223 *
aa74c44be19c8b Wells Lu 2022-01-16 224 * Control-fields are used to set where the function pin is going to
aa74c44be19c8b Wells Lu 2022-01-16 225 * be routed to. A control-field consists of one or more bits.
aa74c44be19c8b Wells Lu 2022-01-16 226 */
aa74c44be19c8b Wells Lu 2022-01-16 227 static void sppctl_gmx_set(struct sppctl_pdata *pctl, u8 reg_off, u8 bit_off, u8 bit_sz,
aa74c44be19c8b Wells Lu 2022-01-16 228 u8 val)
aa74c44be19c8b Wells Lu 2022-01-16 @229 {
aa74c44be19c8b Wells Lu 2022-01-16 230 u32 mask, reg;
aa74c44be19c8b Wells Lu 2022-01-16 231
aa74c44be19c8b Wells Lu 2022-01-16 232 /*
aa74c44be19c8b Wells Lu 2022-01-16 233 * Note that upper 16-bit word are mask-fields and lower 16-bit
aa74c44be19c8b Wells Lu 2022-01-16 234 * word are the control-fields. Set corresponding bits in mask-
aa74c44be19c8b Wells Lu 2022-01-16 235 * field before write to a control-field.
aa74c44be19c8b Wells Lu 2022-01-16 236 */
aa74c44be19c8b Wells Lu 2022-01-16 237 mask = GENMASK(bit_sz - 1, 0) << SPPCTL_MOON_REG_MASK_SHIFT;
aa74c44be19c8b Wells Lu 2022-01-16 238 reg = (mask | val) << bit_off;
aa74c44be19c8b Wells Lu 2022-01-16 239
aa74c44be19c8b Wells Lu 2022-01-16 240 writel(reg, pctl->moon1_base + reg_off * 4);
aa74c44be19c8b Wells Lu 2022-01-16 241 }
aa74c44be19c8b Wells Lu 2022-01-16 242
aa74c44be19c8b Wells Lu 2022-01-16 243 /**
aa74c44be19c8b Wells Lu 2022-01-16 244 * sppctl_first_get() - get bit of FIRST register.
aa74c44be19c8b Wells Lu 2022-01-16 245 *
aa74c44be19c8b Wells Lu 2022-01-16 246 * There are 4 FIRST registers. Each has 32 control-bits.
aa74c44be19c8b Wells Lu 2022-01-16 247 * Totally, there are 4 * 32 = 128 control-bits.
aa74c44be19c8b Wells Lu 2022-01-16 248 * Control-bits are arranged as shown below:
aa74c44be19c8b Wells Lu 2022-01-16 249 *
aa74c44be19c8b Wells Lu 2022-01-16 250 * registers | control-bits
aa74c44be19c8b Wells Lu 2022-01-16 251 * -----------+--------------
aa74c44be19c8b Wells Lu 2022-01-16 252 * first[0] | (31 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 253 * first[1] | (63 : 32)
aa74c44be19c8b Wells Lu 2022-01-16 254 * first[2] | (95 : 64)
aa74c44be19c8b Wells Lu 2022-01-16 255 * first[3] | (127 : 96)
aa74c44be19c8b Wells Lu 2022-01-16 256 *
aa74c44be19c8b Wells Lu 2022-01-16 257 * Each control-bit sets type of a GPIO pin.
aa74c44be19c8b Wells Lu 2022-01-16 258 * 0: a fully-pinmux pin
aa74c44be19c8b Wells Lu 2022-01-16 259 * 1: a GPIO or IOP pin
aa74c44be19c8b Wells Lu 2022-01-16 260 */
aa74c44be19c8b Wells Lu 2022-01-16 261 static int sppctl_first_get(struct gpio_chip *chip, unsigned int offset)
aa74c44be19c8b Wells Lu 2022-01-16 @262 {
aa74c44be19c8b Wells Lu 2022-01-16 263 struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
aa74c44be19c8b Wells Lu 2022-01-16 264 u32 reg_off, bit_off, reg;
aa74c44be19c8b Wells Lu 2022-01-16 265
aa74c44be19c8b Wells Lu 2022-01-16 266 bit_off = sppctl_get_reg_and_bit_offset(offset, &reg_off);
aa74c44be19c8b Wells Lu 2022-01-16 267 reg = sppctl_first_readl(spp_gchip, reg_off);
aa74c44be19c8b Wells Lu 2022-01-16 268
aa74c44be19c8b Wells Lu 2022-01-16 269 return (reg & BIT(bit_off)) ? 1 : 0;
aa74c44be19c8b Wells Lu 2022-01-16 270 }
aa74c44be19c8b Wells Lu 2022-01-16 271
aa74c44be19c8b Wells Lu 2022-01-16 272 /**
aa74c44be19c8b Wells Lu 2022-01-16 273 * sppctl_master_get() - get bit of MASTER register.
aa74c44be19c8b Wells Lu 2022-01-16 274 *
aa74c44be19c8b Wells Lu 2022-01-16 275 * There are 8 MASTER registers. Each has 16 mask-bits and 16 control-bits.
aa74c44be19c8b Wells Lu 2022-01-16 276 * Upper 16-bit of MASTER registers are mask-bits while lower 16-bit are
aa74c44be19c8b Wells Lu 2022-01-16 277 * control-bits. Totally, there are 128 mask-bits and 128 control-bits.
aa74c44be19c8b Wells Lu 2022-01-16 278 * They are arranged as shown below:
aa74c44be19c8b Wells Lu 2022-01-16 279 *
aa74c44be19c8b Wells Lu 2022-01-16 280 * register | mask-bits | control-bits
aa74c44be19c8b Wells Lu 2022-01-16 281 * -----------+-------------+--------------
aa74c44be19c8b Wells Lu 2022-01-16 282 * master[0] | (15 : 0) | (15 : 0)
aa74c44be19c8b Wells Lu 2022-01-16 283 * master[1] | (31 : 16) | (31 : 16)
aa74c44be19c8b Wells Lu 2022-01-16 284 * master[2] | (47 : 32) | (47 : 32)
aa74c44be19c8b Wells Lu 2022-01-16 285 * : | : | :
aa74c44be19c8b Wells Lu 2022-01-16 286 * master[7] | (127 : 112) | (127 : 112)
aa74c44be19c8b Wells Lu 2022-01-16 287 *
aa74c44be19c8b Wells Lu 2022-01-16 288 * where mask-bits are used to protect control-bits from write-in
aa74c44be19c8b Wells Lu 2022-01-16 289 * accidentally. Set the corresponding mask-bit before you write
aa74c44be19c8b Wells Lu 2022-01-16 290 * a value into a control-bit.
aa74c44be19c8b Wells Lu 2022-01-16 291 *
aa74c44be19c8b Wells Lu 2022-01-16 292 * Each control-bit sets type of a GPIO pin when FIRST bit is 1.
aa74c44be19c8b Wells Lu 2022-01-16 293 * 0: a IOP pin
aa74c44be19c8b Wells Lu 2022-01-16 294 * 1: a GPIO pin
aa74c44be19c8b Wells Lu 2022-01-16 295 */
aa74c44be19c8b Wells Lu 2022-01-16 296 static int sppctl_master_get(struct gpio_chip *chip, unsigned int offset)
aa74c44be19c8b Wells Lu 2022-01-16 @297 {
aa74c44be19c8b Wells Lu 2022-01-16 298 struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
aa74c44be19c8b Wells Lu 2022-01-16 299 u32 reg_off, bit_off, reg;
aa74c44be19c8b Wells Lu 2022-01-16 300
aa74c44be19c8b Wells Lu 2022-01-16 301 bit_off = sppctl_get_moon_reg_and_bit_offset(offset, &reg_off);
aa74c44be19c8b Wells Lu 2022-01-16 302 reg = sppctl_gpio_master_readl(spp_gchip, reg_off);
aa74c44be19c8b Wells Lu 2022-01-16 303 return (reg & BIT(bit_off)) ? 1 : 0;
aa74c44be19c8b Wells Lu 2022-01-16 304 }
aa74c44be19c8b Wells Lu 2022-01-16 305

:::::: The code at line 176 was first introduced by commit
:::::: aa74c44be19c8b1de38d955c2c45c309991c805a pinctrl: Add driver for Sunplus SP7021

:::::: TO: Wells Lu <wellslutw@xxxxxxxxx>
:::::: CC: Linus Walleij <linus.walleij@xxxxxxxxxx>

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