tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.18.y head: 22a992953741ad79c07890d3f4104585e52ef26b commit: ca2e1cc1f82f619eeb2aa22f06f01097bac355fd [3493/3591] serial: 8250: Add proper clock handling for OxSemi PCIe devices reproduce: # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=ca2e1cc1f82f619eeb2aa22f06f01097bac355fd git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-5.18.y git checkout ca2e1cc1f82f619eeb2aa22f06f01097bac355fd make menuconfig # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS make htmldocs If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> Documentation/tty/device_drivers/oxsemi-tornado.rst:41: WARNING: Inline interpreted text or phrase reference start-string without end-string. >> Documentation/tty/device_drivers/oxsemi-tornado.rst:96: WARNING: Block quote ends without a blank line; unexpected unindent. >> Documentation/tty/device_drivers/oxsemi-tornado.rst: WARNING: document isn't included in any toctree vim +41 Documentation/tty/device_drivers/oxsemi-tornado.rst 40 > 41 Here are the figures for the standard and some non-standard baud rates 42 (including those quoted in Oxford Semiconductor documentation), giving 43 the requested rate (r), the actual rate yielded (a) and its deviation 44 from the requested rate (d), and the values of the oversampling rate 45 (tcr), the clock prescaler (cpr) and the divisor (div) produced by the 46 new `get_divisor' handler: 47 48 r: 15625000, a: 15625000.00, d: 0.0000%, tcr: 4, cpr: 1.000, div: 1 49 r: 12500000, a: 12500000.00, d: 0.0000%, tcr: 5, cpr: 1.000, div: 1 50 r: 10416666, a: 10416666.67, d: 0.0000%, tcr: 6, cpr: 1.000, div: 1 51 r: 8928571, a: 8928571.43, d: 0.0000%, tcr: 7, cpr: 1.000, div: 1 52 r: 7812500, a: 7812500.00, d: 0.0000%, tcr: 8, cpr: 1.000, div: 1 53 r: 4000000, a: 4000000.00, d: 0.0000%, tcr: 5, cpr: 3.125, div: 1 54 r: 3686400, a: 3676470.59, d: -0.2694%, tcr: 8, cpr: 2.125, div: 1 55 r: 3500000, a: 3496503.50, d: -0.0999%, tcr: 13, cpr: 1.375, div: 1 56 r: 3000000, a: 2976190.48, d: -0.7937%, tcr: 14, cpr: 1.500, div: 1 57 r: 2500000, a: 2500000.00, d: 0.0000%, tcr: 10, cpr: 2.500, div: 1 58 r: 2000000, a: 2000000.00, d: 0.0000%, tcr: 10, cpr: 3.125, div: 1 59 r: 1843200, a: 1838235.29, d: -0.2694%, tcr: 16, cpr: 2.125, div: 1 60 r: 1500000, a: 1492537.31, d: -0.4975%, tcr: 5, cpr: 8.375, div: 1 61 r: 1152000, a: 1152073.73, d: 0.0064%, tcr: 14, cpr: 3.875, div: 1 62 r: 921600, a: 919117.65, d: -0.2694%, tcr: 16, cpr: 2.125, div: 2 63 r: 576000, a: 576036.87, d: 0.0064%, tcr: 14, cpr: 3.875, div: 2 64 r: 460800, a: 460829.49, d: 0.0064%, tcr: 7, cpr: 3.875, div: 5 65 r: 230400, a: 230414.75, d: 0.0064%, tcr: 14, cpr: 3.875, div: 5 66 r: 115200, a: 115207.37, d: 0.0064%, tcr: 14, cpr: 1.250, div: 31 67 r: 57600, a: 57603.69, d: 0.0064%, tcr: 8, cpr: 3.875, div: 35 68 r: 38400, a: 38402.46, d: 0.0064%, tcr: 14, cpr: 3.875, div: 30 69 r: 19200, a: 19201.23, d: 0.0064%, tcr: 8, cpr: 3.875, div: 105 70 r: 9600, a: 9600.06, d: 0.0006%, tcr: 9, cpr: 1.125, div: 643 71 r: 4800, a: 4799.98, d: -0.0004%, tcr: 7, cpr: 2.875, div: 647 72 r: 2400, a: 2400.02, d: 0.0008%, tcr: 9, cpr: 2.250, div: 1286 73 r: 1200, a: 1200.00, d: 0.0000%, tcr: 14, cpr: 2.875, div: 1294 74 r: 300, a: 300.00, d: 0.0000%, tcr: 11, cpr: 2.625, div: 7215 75 r: 200, a: 200.00, d: 0.0000%, tcr: 16, cpr: 1.250, div: 15625 76 r: 150, a: 150.00, d: 0.0000%, tcr: 13, cpr: 2.250, div: 14245 77 r: 134, a: 134.00, d: 0.0000%, tcr: 11, cpr: 2.625, div: 16153 78 r: 110, a: 110.00, d: 0.0000%, tcr: 12, cpr: 1.000, div: 47348 79 r: 75, a: 75.00, d: 0.0000%, tcr: 4, cpr: 5.875, div: 35461 80 r: 50, a: 50.00, d: 0.0000%, tcr: 16, cpr: 1.250, div: 62500 81 r: 25, a: 25.00, d: 0.0000%, tcr: 16, cpr: 2.500, div: 62500 82 r: 4, a: 4.00, d: 0.0000%, tcr: 16, cpr: 20.000, div: 48828 83 r: 2, a: 2.00, d: 0.0000%, tcr: 16, cpr: 40.000, div: 48828 84 r: 1, a: 1.00, d: 0.0000%, tcr: 16, cpr: 63.875, div: 61154 85 86 With the baud base set to 15625000 and the unsigned 16-bit UART_DIV_MAX 87 limitation imposed by `serial8250_get_baud_rate' standard baud rates 88 below 300bps become unavailable in the regular way, e.g. the rate of 89 200bps requires the baud base to be divided by 78125 and that is beyond 90 the unsigned 16-bit range. The historic spd_cust feature can still be 91 used by encoding the values for, the prescaler, the oversampling rate 92 and the clock divisor (DLM/DLL) as follows to obtain such rates if so 93 required: 94 95 31 29 28 20 19 16 15 0 > 96 +-----+-----------------+-------+-------------------------------+ 97 |0 0 0| CPR2:CPR | TCR | DLM:DLL | 98 +-----+-----------------+-------+-------------------------------+ 99 -- 0-DAY CI Kernel Test Service https://01.org/lkp
