Re: [PATCH v1 1/1] i2c: designware: Switch over to i2c_freq_mode_string()

From: kernel test robot
Date: Tue Mar 30 2021 - 10:57:48 EST

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Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on wsa/i2c/for-next]
[also build test ERROR on v5.12-rc5 next-20210330]
[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]

url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/i2c-designware-Switch-over-to-i2c_freq_mode_string/20210330-214856
base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next
config: arm64-randconfig-r026-20210330 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 482283042f795ecc27838a3b2f76b5494991401c)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://github.com/0day-ci/linux/commit/fc212e73959cd6616bd734027805962593a28d9a
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Andy-Shevchenko/i2c-designware-Switch-over-to-i2c_freq_mode_string/20210330-214856
git checkout fc212e73959cd6616bd734027805962593a28d9a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64

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

All error/warnings (new ones prefixed by >>):

In file included from drivers/i2c/busses/i2c-designware-master.c:16:
In file included from include/linux/i2c.h:13:
In file included from include/linux/acpi.h:35:
In file included from include/acpi/acpi_io.h:7:
In file included from arch/arm64/include/asm/acpi.h:12:
include/linux/efi.h:1093:34: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch]
status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
^
include/linux/efi.h:1101:24: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch]
get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
^
>> drivers/i2c/busses/i2c-designware-master.c:158:39: error: implicit declaration of function 'i2c_freq_mode_string' [-Werror,-Wimplicit-function-declaration]
dev_dbg(dev->dev, "Bus speed: %s\n", i2c_freq_mode_string(t->bus_freq_hz));
^
>> drivers/i2c/busses/i2c-designware-master.c:158:39: warning: format specifies type 'char *' but the argument has type 'int' [-Wformat]
dev_dbg(dev->dev, "Bus speed: %s\n", i2c_freq_mode_string(t->bus_freq_hz));
~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
%d
include/linux/dev_printk.h:126:46: note: expanded from macro 'dev_dbg'
dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
~~~ ^~~~~~~~~~~
3 warnings and 1 error generated.

vim +/i2c_freq_mode_string +158 drivers/i2c/busses/i2c-designware-master.c

35
36 static int i2c_dw_set_timings_master(struct dw_i2c_dev *dev)
37 {
38 u32 comp_param1;
39 u32 sda_falling_time, scl_falling_time;
40 struct i2c_timings *t = &dev->timings;
41 const char *fp_str = "";
42 u32 ic_clk;
43 int ret;
44
45 ret = i2c_dw_acquire_lock(dev);
46 if (ret)
47 return ret;
48
49 ret = regmap_read(dev->map, DW_IC_COMP_PARAM_1, &comp_param1);
50 i2c_dw_release_lock(dev);
51 if (ret)
52 return ret;
53
54 /* Set standard and fast speed dividers for high/low periods */
55 sda_falling_time = t->sda_fall_ns ?: 300; /* ns */
56 scl_falling_time = t->scl_fall_ns ?: 300; /* ns */
57
58 /* Calculate SCL timing parameters for standard mode if not set */
59 if (!dev->ss_hcnt || !dev->ss_lcnt) {
60 ic_clk = i2c_dw_clk_rate(dev);
61 dev->ss_hcnt =
62 i2c_dw_scl_hcnt(ic_clk,
63 4000, /* tHD;STA = tHIGH = 4.0 us */
64 sda_falling_time,
65 0, /* 0: DW default, 1: Ideal */
66 0); /* No offset */
67 dev->ss_lcnt =
68 i2c_dw_scl_lcnt(ic_clk,
69 4700, /* tLOW = 4.7 us */
70 scl_falling_time,
71 0); /* No offset */
72 }
73 dev_dbg(dev->dev, "Standard Mode HCNT:LCNT = %d:%d\n",
74 dev->ss_hcnt, dev->ss_lcnt);
75
76 /*
77 * Set SCL timing parameters for fast mode or fast mode plus. Only
78 * difference is the timing parameter values since the registers are
79 * the same.
80 */
81 if (t->bus_freq_hz == 1000000) {
82 /*
83 * Check are Fast Mode Plus parameters available. Calculate
84 * SCL timing parameters for Fast Mode Plus if not set.
85 */
86 if (dev->fp_hcnt && dev->fp_lcnt) {
87 dev->fs_hcnt = dev->fp_hcnt;
88 dev->fs_lcnt = dev->fp_lcnt;
89 } else {
90 ic_clk = i2c_dw_clk_rate(dev);
91 dev->fs_hcnt =
92 i2c_dw_scl_hcnt(ic_clk,
93 260, /* tHIGH = 260 ns */
94 sda_falling_time,
95 0, /* DW default */
96 0); /* No offset */
97 dev->fs_lcnt =
98 i2c_dw_scl_lcnt(ic_clk,
99 500, /* tLOW = 500 ns */
100 scl_falling_time,
101 0); /* No offset */
102 }
103 fp_str = " Plus";
104 }
105 /*
106 * Calculate SCL timing parameters for fast mode if not set. They are
107 * needed also in high speed mode.
108 */
109 if (!dev->fs_hcnt || !dev->fs_lcnt) {
110 ic_clk = i2c_dw_clk_rate(dev);
111 dev->fs_hcnt =
112 i2c_dw_scl_hcnt(ic_clk,
113 600, /* tHD;STA = tHIGH = 0.6 us */
114 sda_falling_time,
115 0, /* 0: DW default, 1: Ideal */
116 0); /* No offset */
117 dev->fs_lcnt =
118 i2c_dw_scl_lcnt(ic_clk,
119 1300, /* tLOW = 1.3 us */
120 scl_falling_time,
121 0); /* No offset */
122 }
123 dev_dbg(dev->dev, "Fast Mode%s HCNT:LCNT = %d:%d\n",
124 fp_str, dev->fs_hcnt, dev->fs_lcnt);
125
126 /* Check is high speed possible and fall back to fast mode if not */
127 if ((dev->master_cfg & DW_IC_CON_SPEED_MASK) ==
128 DW_IC_CON_SPEED_HIGH) {
129 if ((comp_param1 & DW_IC_COMP_PARAM_1_SPEED_MODE_MASK)
130 != DW_IC_COMP_PARAM_1_SPEED_MODE_HIGH) {
131 dev_err(dev->dev, "High Speed not supported!\n");
132 dev->master_cfg &= ~DW_IC_CON_SPEED_MASK;
133 dev->master_cfg |= DW_IC_CON_SPEED_FAST;
134 dev->hs_hcnt = 0;
135 dev->hs_lcnt = 0;
136 } else if (!dev->hs_hcnt || !dev->hs_lcnt) {
137 ic_clk = i2c_dw_clk_rate(dev);
138 dev->hs_hcnt =
139 i2c_dw_scl_hcnt(ic_clk,
140 160, /* tHIGH = 160 ns */
141 sda_falling_time,
142 0, /* DW default */
143 0); /* No offset */
144 dev->hs_lcnt =
145 i2c_dw_scl_lcnt(ic_clk,
146 320, /* tLOW = 320 ns */
147 scl_falling_time,
148 0); /* No offset */
149 }
150 dev_dbg(dev->dev, "High Speed Mode HCNT:LCNT = %d:%d\n",
151 dev->hs_hcnt, dev->hs_lcnt);
152 }
153
154 ret = i2c_dw_set_sda_hold(dev);
155 if (ret)
156 return ret;
157
> 158 dev_dbg(dev->dev, "Bus speed: %s\n", i2c_freq_mode_string(t->bus_freq_hz));
159 return 0;
160 }
161

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

Attachment: .config.gz
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Next message: Minchan Kim: "Re: [PATCH] mm: change size_t to unsigned int for cma_alloc"
Previous message: Marc Zyngier: "[PATCH v19 5/7] clocksource: Add clocksource id for arm arch counter"
In reply to: kernel test robot: "Re: [PATCH v1 1/1] i2c: designware: Switch over to i2c_freq_mode_string()"
Next in thread: Jarkko Nikula: "Re: [PATCH v1 1/1] i2c: designware: Switch over to i2c_freq_mode_string()"
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