Hi Nishad, Thank you for the patch! Yet something to improve: [auto build test ERROR on staging/staging-testing] [also build test ERROR on v4.19 next-20181019] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Nishad-Kamdar/staging-olpc_dcon-olpc_dcon_xo_1-c-Switch-to-the-gpio-descriptor-interface/20181028-124517 config: i386-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): drivers/staging/olpc_dcon/olpc_dcon_xo_1.c: In function 'dcon_init_xo_1': >> drivers/staging/olpc_dcon/olpc_dcon_xo_1.c:37:43: error: dereferencing pointer to incomplete type 'struct backlight_device' *pin->ptr = devm_gpiod_get(&dcon->bl_dev->dev, pin->name, ^~ >> drivers/staging/olpc_dcon/olpc_dcon_xo_1.c:41:4: error: implicit declaration of function 'dev_err'; did you mean 'pr_err'? [-Werror=implicit-function-declaration] dev_err(&dcon->bl_dev->dev, ^~~~~~~ pr_err >> drivers/staging/olpc_dcon/olpc_dcon_xo_1.c:89:3: error: label 'err_req_irq' used but not defined goto err_req_irq; ^~~~ cc1: some warnings being treated as errors vim +37 drivers/staging/olpc_dcon/olpc_dcon_xo_1.c 19 20 static int dcon_init_xo_1(struct dcon_priv *dcon) 21 { 22 unsigned char lob; 23 int ret, i; 24 struct dcon_gpio *pin; 25 unsigned long flags = GPIOD_ASIS; 26 27 struct dcon_gpio gpios[] = { 28 { .ptr = &dcon_stat0, .name = "dcon_stat0", .flags = flags }, 29 { .ptr = &dcon_stat1, .name = "dcon_stat1", .flags = flags }, 30 { .ptr = &dcon_irq, .name = "dcon_irq", .flags = flags }, 31 { .ptr = &dcon_load, .name = "dcon_load", .flags = flags }, 32 { .ptr = &dcon_blank, .name = "dcon_blank", .flags = flags }, 33 }; 34 35 for (i = 0; i < ARRAY_SIZE(gpios); i++) { 36 pin = &gpios[i]; > 37 *pin->ptr = devm_gpiod_get(&dcon->bl_dev->dev, pin->name, 38 pin->flags); 39 if (IS_ERR(*pin->ptr)) { 40 ret = PTR_ERR(*pin->ptr); > 41 dev_err(&dcon->bl_dev->dev, 42 "failed to request %s GPIO: %d\n", 43 pin->name, ret); 44 return ret; 45 } 46 } 47 48 /* Turn off the event enable for GPIO7 just to be safe */ 49 cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_EVENTS_ENABLE); 50 51 /* 52 * Determine the current state by reading the GPIO bit; earlier 53 * stages of the boot process have established the state. 54 * 55 * Note that we read GPIO_OUTPUT_VAL rather than GPIO_READ_BACK here; 56 * this is because OFW will disable input for the pin and set a value.. 57 * READ_BACK will only contain a valid value if input is enabled and 58 * then a value is set. So, future readings of the pin can use 59 * READ_BACK, but the first one cannot. Awesome, huh? 60 */ 61 dcon->curr_src = cs5535_gpio_isset(OLPC_GPIO_DCON_LOAD, GPIO_OUTPUT_VAL) 62 ? DCON_SOURCE_CPU 63 : DCON_SOURCE_DCON; 64 dcon->pending_src = dcon->curr_src; 65 66 /* Set the directions for the GPIO pins */ 67 gpiod_direction_input(dcon_stat0); 68 gpiod_direction_input(dcon_stat1); 69 gpiod_direction_input(dcon_irq); 70 gpiod_direction_input(dcon_blank); 71 gpiod_direction_output(dcon_load, dcon->curr_src == DCON_SOURCE_CPU); 72 73 /* Set up the interrupt mappings */ 74 75 /* Set the IRQ to pair 2 */ 76 cs5535_gpio_setup_event(OLPC_GPIO_DCON_IRQ, 2, 0); 77 78 /* Enable group 2 to trigger the DCON interrupt */ 79 cs5535_gpio_set_irq(2, DCON_IRQ); 80 81 /* Select edge level for interrupt (in PIC) */ 82 lob = inb(0x4d0); 83 lob &= ~(1 << DCON_IRQ); 84 outb(lob, 0x4d0); 85 86 /* Register the interrupt handler */ 87 if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", dcon)) { 88 pr_err("failed to request DCON's irq\n"); > 89 goto err_req_irq; 90 } 91 92 /* Clear INV_EN for GPIO7 (DCONIRQ) */ 93 cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_INVERT); 94 95 /* Enable filter for GPIO12 (DCONBLANK) */ 96 cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_INPUT_FILTER); 97 98 /* Disable filter for GPIO7 */ 99 cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_FILTER); 100 101 /* Disable event counter for GPIO7 (DCONIRQ) and GPIO12 (DCONBLANK) */ 102 cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_EVENT_COUNT); 103 cs5535_gpio_clear(OLPC_GPIO_DCON_BLANK, GPIO_INPUT_EVENT_COUNT); 104 105 /* Add GPIO12 to the Filter Event Pair #7 */ 106 cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_FE7_SEL); 107 108 /* Turn off negative Edge Enable for GPIO12 */ 109 cs5535_gpio_clear(OLPC_GPIO_DCON_BLANK, GPIO_NEGATIVE_EDGE_EN); 110 111 /* Enable negative Edge Enable for GPIO7 */ 112 cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_EN); 113 114 /* Zero the filter amount for Filter Event Pair #7 */ 115 cs5535_gpio_set(0, GPIO_FLTR7_AMOUNT); 116 117 /* Clear the negative edge status for GPIO7 and GPIO12 */ 118 cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_STS); 119 cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_NEGATIVE_EDGE_STS); 120 121 /* FIXME: Clear the positive status as well, just to be sure */ 122 cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_POSITIVE_EDGE_STS); 123 cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_POSITIVE_EDGE_STS); 124 125 /* Enable events for GPIO7 (DCONIRQ) and GPIO12 (DCONBLANK) */ 126 cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_EVENTS_ENABLE); 127 cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_EVENTS_ENABLE); 128 129 return 0; 130 } 131 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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