diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/ab8500-gpadc.c | 212 |
1 files changed, 55 insertions, 157 deletions
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c index e3535c74d5fe..af1db2a45e86 100644 --- a/drivers/mfd/ab8500-gpadc.c +++ b/drivers/mfd/ab8500-gpadc.c @@ -360,7 +360,12 @@ int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel, { int ret; int looplimit = 0; + unsigned long completion_timeout; u8 val, low_data, high_data, low_data2, high_data2; + u8 val_reg1 = 0; + unsigned int delay_min = 0; + unsigned int delay_max = 0; + u8 data_low_addr, data_high_addr; if (!gpadc) return -ENODEV; @@ -392,12 +397,7 @@ int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel, } /* Enable GPADC */ - ret = abx500_mask_and_set_register_interruptible(gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, EN_GPADC, EN_GPADC); - if (ret < 0) { - dev_err(gpadc->dev, "gpadc_conversion: enable gpadc failed\n"); - goto out; - } + val_reg1 |= EN_GPADC; /* Select the channel source and set average samples */ switch (avg_sample) { @@ -415,9 +415,13 @@ int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel, break; } - if (conv_type == ADC_HW) + if (conv_type == ADC_HW) { ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC, AB8500_GPADC_CTRL3_REG, val); + val_reg1 |= EN_TRIG_EDGE; + if (trig_edge) + val_reg1 |= EN_FALLING; + } else ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC, AB8500_GPADC_CTRL2_REG, val); @@ -432,123 +436,42 @@ int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel, * charging current sense if it needed, ABB 3.0 needs some special * treatment too. */ - if ((conv_type == ADC_HW) && (trig_edge)) { - ret = abx500_mask_and_set_register_interruptible(gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_FALLING, EN_FALLING); - } - switch (channel) { case MAIN_CHARGER_C: case USB_CHARGER_C: - if (conv_type == ADC_HW) - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | EN_ICHAR | EN_TRIG_EDGE, - EN_BUF | EN_ICHAR | EN_TRIG_EDGE); - else - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | EN_ICHAR, - EN_BUF | EN_ICHAR); - break; - - case XTAL_TEMP: - if (conv_type == ADC_HW) - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | EN_TRIG_EDGE, - EN_BUF | EN_TRIG_EDGE); - else - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF , - EN_BUF); - break; - - case VBAT_TRUE_MEAS: - if (conv_type == ADC_HW) - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | EN_TRIG_EDGE, - EN_BUF | EN_TRIG_EDGE); - else - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF , - EN_BUF); - break; - - case BAT_CTRL_AND_IBAT: - case VBAT_MEAS_AND_IBAT: - case VBAT_TRUE_MEAS_AND_IBAT: - case BAT_TEMP_AND_IBAT: - if (conv_type == ADC_HW) - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_TRIG_EDGE, - EN_TRIG_EDGE); - else - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF, - 0); + val_reg1 |= EN_BUF | EN_ICHAR; break; - case BTEMP_BALL: if (!is_ab8500_2p0_or_earlier(gpadc->parent)) { - if (conv_type == ADC_HW) - /* Turn on btemp pull-up on ABB 3.0 */ - ret = abx500_mask_and_set_register_interruptible - (gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | BTEMP_PULL_UP | EN_TRIG_EDGE, - EN_BUF | BTEMP_PULL_UP | EN_TRIG_EDGE); - else - ret = abx500_mask_and_set_register_interruptible - (gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | BTEMP_PULL_UP, - EN_BUF | BTEMP_PULL_UP); - - /* - * Delay might be needed for ABB8500 cut 3.0, if not, remove - * when hardware will be available - */ - usleep_range(1000, 1000); + val_reg1 |= EN_BUF | BTEMP_PULL_UP; + /* + * Delay might be needed for ABB8500 cut 3.0, if not, + * remove when hardware will be availible + */ + delay_min = 1000; /* Delay in micro seconds */ + delay_max = 10000; /* large range to optimise sleep mode */ break; } /* Intentional fallthrough */ default: - if (conv_type == ADC_HW) - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, AB8500_GPADC_CTRL1_REG, - EN_BUF | EN_TRIG_EDGE, - EN_BUF | EN_TRIG_EDGE); - else - ret = abx500_mask_and_set_register_interruptible( - gpadc->dev, - AB8500_GPADC, - AB8500_GPADC_CTRL1_REG, EN_BUF, EN_BUF); + val_reg1 |= EN_BUF; break; } + + /* Write configuration to register */ + ret = abx500_set_register_interruptible(gpadc->dev, + AB8500_GPADC, AB8500_GPADC_CTRL1_REG, val_reg1); if (ret < 0) { dev_err(gpadc->dev, - "gpadc_conversion: select falling edge failed\n"); + "gpadc_conversion: set Control register failed\n"); goto out; } - /* Set trigger delay timer */ + if (delay_min != 0) + usleep_range(delay_min, delay_max); + if (conv_type == ADC_HW) { + /* Set trigger delay timer */ ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC, AB8500_GPADC_AUTO_TIMER_REG, trig_timer); if (ret < 0) { @@ -556,10 +479,11 @@ int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel, "gpadc_conversion: trig timer failed\n"); goto out; } - } - - /* Start SW conversion */ - if (conv_type == ADC_SW) { + completion_timeout = 2 * HZ; + data_low_addr = AB8500_GPADC_AUTODATAL_REG; + data_high_addr = AB8500_GPADC_AUTODATAH_REG; + } else { + /* Start SW conversion */ ret = abx500_mask_and_set_register_interruptible(gpadc->dev, AB8500_GPADC, AB8500_GPADC_CTRL1_REG, ADC_SW_CONV, ADC_SW_CONV); @@ -568,61 +492,35 @@ int ab8500_gpadc_double_read_raw(struct ab8500_gpadc *gpadc, u8 channel, "gpadc_conversion: start s/w conv failed\n"); goto out; } + completion_timeout = msecs_to_jiffies(CONVERSION_TIME); + data_low_addr = AB8500_GPADC_MANDATAL_REG; + data_high_addr = AB8500_GPADC_MANDATAH_REG; } /* wait for completion of conversion */ - if (conv_type == ADC_HW) { - if (!wait_for_completion_timeout(&gpadc->ab8500_gpadc_complete, - 2 * HZ)) { - dev_err(gpadc->dev, - "timeout didn't receive hw GPADC conv interrupt\n"); - ret = -EINVAL; - goto out; - } - } else { - if (!wait_for_completion_timeout(&gpadc->ab8500_gpadc_complete, - msecs_to_jiffies(CONVERSION_TIME))) { - dev_err(gpadc->dev, - "timeout didn't receive sw GPADC conv interrupt\n"); - ret = -EINVAL; - goto out; - } + if (!wait_for_completion_timeout(&gpadc->ab8500_gpadc_complete, + completion_timeout)) { + dev_err(gpadc->dev, + "timeout didn't receive GPADC conv interrupt\n"); + ret = -EINVAL; + goto out; } /* Read the converted RAW data */ - if (conv_type == ADC_HW) { - ret = abx500_get_register_interruptible(gpadc->dev, - AB8500_GPADC, AB8500_GPADC_AUTODATAL_REG, &low_data); - if (ret < 0) { - dev_err(gpadc->dev, - "gpadc_conversion: read hw low data failed\n"); - goto out; - } - - ret = abx500_get_register_interruptible(gpadc->dev, - AB8500_GPADC, AB8500_GPADC_AUTODATAH_REG, &high_data); - if (ret < 0) { - dev_err(gpadc->dev, - "gpadc_conversion: read hw high data failed\n"); - goto out; - } - } else { - ret = abx500_get_register_interruptible(gpadc->dev, - AB8500_GPADC, AB8500_GPADC_MANDATAL_REG, &low_data); - if (ret < 0) { - dev_err(gpadc->dev, - "gpadc_conversion: read sw low data failed\n"); - goto out; - } + ret = abx500_get_register_interruptible(gpadc->dev, + AB8500_GPADC, data_low_addr, &low_data); + if (ret < 0) { + dev_err(gpadc->dev, "gpadc_conversion: read low data failed\n"); + goto out; + } - ret = abx500_get_register_interruptible(gpadc->dev, - AB8500_GPADC, AB8500_GPADC_MANDATAH_REG, &high_data); - if (ret < 0) { - dev_err(gpadc->dev, - "gpadc_conversion: read sw high data failed\n"); - goto out; - } + ret = abx500_get_register_interruptible(gpadc->dev, + AB8500_GPADC, data_high_addr, &high_data); + if (ret < 0) { + dev_err(gpadc->dev, "gpadc_conversion: read high data failed\n"); + goto out; } + /* Check if double convertion is required */ if ((channel == BAT_CTRL_AND_IBAT) || (channel == VBAT_MEAS_AND_IBAT) || |