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| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-12-18 22:52:20 +0100 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-12-18 22:52:20 +0100 |
| commit | 1ddf624b0b268fdc0b80b1de618b98f8d117afea (patch) | |
| tree | 3d3218332bcb34cb0afa01d6ad996058a3dbcb77 /drivers/iio/adc/axp288_adc.c | |
| parent | 6b774eec1f9d3064e9b33634dfa99d5666d0a73a (diff) | |
| parent | bfb9e5c03076a446b1f4f6a523ddc8d723c907a6 (diff) | |
Merge tag 'v4.14.159' into 4.14-2.0.x-imx
This is the 4.14.159 stable release
Conflicts:
arch/arm/Kconfig.debug
arch/arm/boot/dts/imx7s.dtsi
arch/arm/mach-imx/cpuidle-imx6sx.c
drivers/crypto/caam/caamalg.c
drivers/crypto/mxs-dcp.c
drivers/dma/imx-sdma.c
drivers/input/keyboard/imx_keypad.c
drivers/net/can/flexcan.c
drivers/net/can/rx-offload.c
drivers/net/wireless/ath/ath10k/pci.c
drivers/pci/dwc/pci-imx6.c
drivers/spi/spi-fsl-lpspi.c
drivers/usb/dwc3/gadget.c
Diffstat (limited to 'drivers/iio/adc/axp288_adc.c')
| -rw-r--r-- | drivers/iio/adc/axp288_adc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/iio/adc/axp288_adc.c b/drivers/iio/adc/axp288_adc.c index 0153df01e7b6..546bbe59c241 100644 --- a/drivers/iio/adc/axp288_adc.c +++ b/drivers/iio/adc/axp288_adc.c @@ -16,6 +16,7 @@ * */ +#include <linux/dmi.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> @@ -34,6 +35,11 @@ #define AXP288_ADC_EN_MASK 0xF0 #define AXP288_ADC_TS_ENABLE 0x01 +#define AXP288_ADC_TS_BIAS_MASK GENMASK(5, 4) +#define AXP288_ADC_TS_BIAS_20UA (0 << 4) +#define AXP288_ADC_TS_BIAS_40UA (1 << 4) +#define AXP288_ADC_TS_BIAS_60UA (2 << 4) +#define AXP288_ADC_TS_BIAS_80UA (3 << 4) #define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0) #define AXP288_ADC_TS_CURRENT_OFF (0 << 0) #define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0) @@ -194,10 +200,36 @@ static int axp288_adc_read_raw(struct iio_dev *indio_dev, return ret; } +/* + * We rely on the machine's firmware to correctly setup the TS pin bias current + * at boot. This lists systems with broken fw where we need to set it ourselves. + */ +static const struct dmi_system_id axp288_adc_ts_bias_override[] = { + { + /* Lenovo Ideapad 100S (11 inch) */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 100S-11IBY"), + }, + .driver_data = (void *)(uintptr_t)AXP288_ADC_TS_BIAS_80UA, + }, + {} +}; + static int axp288_adc_initialize(struct axp288_adc_info *info) { + const struct dmi_system_id *bias_override; int ret, adc_enable_val; + bias_override = dmi_first_match(axp288_adc_ts_bias_override); + if (bias_override) { + ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL, + AXP288_ADC_TS_BIAS_MASK, + (uintptr_t)bias_override->driver_data); + if (ret) + return ret; + } + /* * Determine if the TS pin is enabled and set the TS current-source * accordingly. |