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X-OriginatorOrg: axis.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Nov 2023 15:57:07.0256 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2447152e-4b0e-4f79-bbae-08dbe0735be3 X-MS-Exchange-CrossTenant-Id: 78703d3c-b907-432f-b066-88f7af9ca3af X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=78703d3c-b907-432f-b066-88f7af9ca3af;Ip=[195.60.68.100];Helo=[mail.axis.com] X-MS-Exchange-CrossTenant-AuthSource: AM2PEPF0001C714.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR02MB6616 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add support for advanced sensitivity settings and signal guard feature. Signed-off-by: Jiri Valek - 2N --- .../bindings/input/microchip,cap11xx.yaml | 76 ++++++++++++++++++- 1 file changed, 73 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml b/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml index 5b5d4f7d3482..aa97702c43ef 100644 --- a/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml +++ b/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml @@ -45,13 +45,13 @@ properties: Enables the Linux input system's autorepeat feature on the input device. linux,keycodes: - minItems: 6 - maxItems: 6 + minItems: 3 + maxItems: 8 description: | Specifies an array of numeric keycode values to be used for the channels. If this property is omitted, KEY_A, KEY_B, etc are used as defaults. - The array must have exactly six entries. + The number of entries must correspond to the number of channels. microchip,sensor-gain: $ref: /schemas/types.yaml#/definitions/uint32 @@ -70,6 +70,55 @@ properties: open drain. This property allows using the active high push-pull output. + microchip,sensitivity-delta-sense: + $ref: /schemas/types.yaml#/definitions/uint32 + default: 32 + enum: [1, 2, 4, 8, 16, 32, 64, 128] + description: + Optional parameter. Controls the sensitivity multiplier of a touch detection. + At the more sensitive settings, touches are detected for a smaller delta + capacitance corresponding to a “lighter” touch. + + microchip,signal-guard: + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 3 + maxItems: 8 + items: + minimum: 0 + maximum: 1 + description: | + Optional parameter supported only for CAP129x. + 0 - off + 1 - on + The signal guard isolates the signal from virtual grounds. + If enabled then the behavior of the channel is changed to signal guard. + The number of entries must correspond to the number of channels. + + microchip,input-treshold: + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 3 + maxItems: 8 + items: + minimum: 0 + maximum: 127 + description: + Optional parameter. Specifies the delta threshold that is used to + determine if a touch has been detected. + The number of entries must correspond to the number of channels. + + microchip,calib-sensitivity: + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 3 + maxItems: 8 + items: + minimum: 1 + maximum: 4 + description: + Optional parameter supported only for CAP129x. Specifies an array of + numeric values that controls the gain used by the calibration routine to + enable sensor inputs to be more sensitive for proximity detection. + The number of entries must correspond to the number of channels. + patternProperties: "^led@[0-7]$": type: object @@ -99,10 +148,29 @@ allOf: contains: enum: - microchip,cap1106 + - microchip,cap1203 + - microchip,cap1206 + - microchip,cap1293 + - microchip,cap1298 then: patternProperties: "^led@[0-7]$": false + - if: + properties: + compatible: + contains: + enum: + - microchip,cap1106 + - microchip,cap1126 + - microchip,cap1188 + - microchip,cap1203 + - microchip,cap1206 + then: + properties: + microchip,signal-guard: false + microchip,calib-sensitivity: false + required: - compatible - interrupts @@ -122,6 +190,8 @@ examples: reg = <0x28>; autorepeat; microchip,sensor-gain = <2>; + microchip,sensitivity-delta-sense = <16>; + microchip,input-treshold = <21>, <18>, <46>, <46>, <46>, <21>; linux,keycodes = <103>, /* KEY_UP */ <106>, /* KEY_RIGHT */ From patchwork Wed Nov 8 15:56:46 2023 Content-Type: text/plain; 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X-OriginatorOrg: axis.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Nov 2023 15:57:08.0881 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 60e1ff79-49bf-408e-dbda-08dbe0735c85 X-MS-Exchange-CrossTenant-Id: 78703d3c-b907-432f-b066-88f7af9ca3af X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=78703d3c-b907-432f-b066-88f7af9ca3af;Ip=[195.60.68.100];Helo=[mail.axis.com] X-MS-Exchange-CrossTenant-AuthSource: AM2PEPF0001C714.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR02MB9444 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add support for advanced sensitivity settings that allows more precise tunig of touch buttons. Input-treshold allows to set the sensitivity for each channel separately. Also add signal guard feature for CAP129x chips. Signed-off-by: Jiri Valek - 2N --- drivers/input/keyboard/cap11xx.c | 242 +++++++++++++++++++++++++------ 1 file changed, 196 insertions(+), 46 deletions(-) diff --git a/drivers/input/keyboard/cap11xx.c b/drivers/input/keyboard/cap11xx.c index 1b4937dce672..4711ea985627 100644 --- a/drivers/input/keyboard/cap11xx.c +++ b/drivers/input/keyboard/cap11xx.c @@ -14,6 +14,7 @@ #include #include #include +#include #define CAP11XX_REG_MAIN_CONTROL 0x00 #define CAP11XX_REG_MAIN_CONTROL_GAIN_SHIFT (6) @@ -24,6 +25,7 @@ #define CAP11XX_REG_NOISE_FLAG_STATUS 0x0a #define CAP11XX_REG_SENOR_DELTA(X) (0x10 + (X)) #define CAP11XX_REG_SENSITIVITY_CONTROL 0x1f +#define CAP11XX_REG_SENSITIVITY_CONTROL_DELTA_SENSE_MASK 0x70 #define CAP11XX_REG_CONFIG 0x20 #define CAP11XX_REG_SENSOR_ENABLE 0x21 #define CAP11XX_REG_SENSOR_CONFIG 0x22 @@ -32,6 +34,7 @@ #define CAP11XX_REG_CALIBRATION 0x26 #define CAP11XX_REG_INT_ENABLE 0x27 #define CAP11XX_REG_REPEAT_RATE 0x28 +#define CAP11XX_REG_SIGNAL_GUARD_ENABLE 0x29 #define CAP11XX_REG_MT_CONFIG 0x2a #define CAP11XX_REG_MT_PATTERN_CONFIG 0x2b #define CAP11XX_REG_MT_PATTERN 0x2d @@ -47,6 +50,8 @@ #define CAP11XX_REG_SENSOR_BASE_CNT(X) (0x50 + (X)) #define CAP11XX_REG_LED_POLARITY 0x73 #define CAP11XX_REG_LED_OUTPUT_CONTROL 0x74 +#define CAP11XX_REG_CALIB_SENSITIVITY_CONFIG 0x80 +#define CAP11XX_REG_CALIB_SENSITIVITY_CONFIG2 0x81 #define CAP11XX_REG_LED_DUTY_CYCLE_1 0x90 #define CAP11XX_REG_LED_DUTY_CYCLE_2 0x91 @@ -78,12 +83,20 @@ struct cap11xx_led { struct cap11xx_priv { struct regmap *regmap; + struct device *dev; struct input_dev *idev; + const struct cap11xx_hw_model *model; + u8 id; struct cap11xx_led *leds; int num_leds; /* config */ + u8 analog_gain; + u8 sensitivity_delta_sense; + u8 signal_guard_inputs_mask; + u32 thresholds[8]; + u32 calib_sensitivities[8]; u32 keycodes[]; }; @@ -181,6 +194,178 @@ static const struct regmap_config cap11xx_regmap_config = { .volatile_reg = cap11xx_volatile_reg, }; +static int +cap11xx_write_calib_sens_config_1(struct cap11xx_priv *priv) +{ + return regmap_write(priv->regmap, + CAP11XX_REG_CALIB_SENSITIVITY_CONFIG, + (priv->calib_sensitivities[3] << 6) | + (priv->calib_sensitivities[2] << 4) | + (priv->calib_sensitivities[1] << 2) | + priv->calib_sensitivities[0]); +} + +static int +cap11xx_write_calib_sens_config_2(struct cap11xx_priv *priv) +{ + return regmap_write(priv->regmap, + CAP11XX_REG_CALIB_SENSITIVITY_CONFIG2, + (priv->calib_sensitivities[7] << 6) | + (priv->calib_sensitivities[6] << 4) | + (priv->calib_sensitivities[5] << 2) | + priv->calib_sensitivities[4]); +} + +static int +cap11xx_init_keys(struct cap11xx_priv *priv) +{ + struct device_node *node = priv->dev->of_node; + struct device *dev = priv->dev; + int i, error; + u32 u32_val; + + if (!node) { + dev_err(dev, "Corresponding DT entry is not available\n"); + return -ENODEV; + } + + if (!of_property_read_u32(node, "microchip,sensor-gain", &u32_val)) { + if (priv->model->no_gain) { + dev_warn(dev, + "This model doesn't support 'sensor-gain'\n"); + } else if (is_power_of_2(u32_val) && u32_val <= 8) { + priv->analog_gain = (u8)ilog2(u32_val); + + error = regmap_update_bits(priv->regmap, + CAP11XX_REG_MAIN_CONTROL, + CAP11XX_REG_MAIN_CONTROL_GAIN_MASK, + priv->analog_gain << CAP11XX_REG_MAIN_CONTROL_GAIN_SHIFT); + if (error) + return error; + } else { + dev_err(dev, "Invalid sensor-gain value %u\n", u32_val); + return -EINVAL; + } + } + + if (of_property_read_bool(node, "microchip,irq-active-high")) { + if (priv->id == CAP1106 || + priv->id == CAP1126 || + priv->id == CAP1188) { + error = regmap_update_bits(priv->regmap, + CAP11XX_REG_CONFIG2, + CAP11XX_REG_CONFIG2_ALT_POL, + 0); + if (error) + return error; + } else { + dev_warn(dev, + "This model doesn't support 'irq-active-high'\n"); + } + } + + if (!of_property_read_u32(node, + "microchip,sensitivity-delta-sense", &u32_val)) { + if (!is_power_of_2(u32_val) || u32_val > 128) { + dev_err(dev, "Invalid sensitivity-delta-sense value %u\n", u32_val); + return -EINVAL; + } + + priv->sensitivity_delta_sense = (u8)ilog2(u32_val); + u32_val = ~(FIELD_PREP(CAP11XX_REG_SENSITIVITY_CONTROL_DELTA_SENSE_MASK, + priv->sensitivity_delta_sense)); + + error = regmap_update_bits(priv->regmap, + CAP11XX_REG_SENSITIVITY_CONTROL, + CAP11XX_REG_SENSITIVITY_CONTROL_DELTA_SENSE_MASK, + u32_val); + if (error) + return error; + } + + if (!of_property_read_u32_array(node, "microchip,input-treshold", + priv->thresholds, priv->model->num_channels)) { + for (i = 0; i < priv->model->num_channels; i++) { + if (priv->thresholds[i] > 127) { + dev_err(dev, "Invalid input-treshold value %u\n", + priv->thresholds[i]); + return -EINVAL; + } + + error = regmap_write(priv->regmap, + CAP11XX_REG_SENSOR_THRESH(i), + priv->thresholds[i]); + if (error) + return error; + } + } + + if (!of_property_read_u32_array(node, "microchip,calib-sensitivity", + priv->calib_sensitivities, priv->model->num_channels)) { + if (priv->id == CAP1293 || priv->id == CAP1298) { + for (i = 0; i < priv->model->num_channels; i++) { + if (!is_power_of_2(priv->calib_sensitivities[i]) || + priv->calib_sensitivities[i] > 4) { + dev_err(dev, "Invalid calib-sensitivity value %u\n", + priv->calib_sensitivities[i]); + return -EINVAL; + } + priv->calib_sensitivities[i] = ilog2(priv->calib_sensitivities[i]); + } + + error = cap11xx_write_calib_sens_config_1(priv); + if (error) + return error; + + if (priv->id == CAP1298) { + error = cap11xx_write_calib_sens_config_2(priv); + if (error) + return error; + } + } else { + dev_warn(dev, + "This model doesn't support 'calib-sensitivity'\n"); + } + } + + for (i = 0; i < priv->model->num_channels; i++) { + if (!of_property_read_u32_index(node, "microchip,signal-guard", + i, &u32_val)) { + if (u32_val > 1) + return -EINVAL; + if (u32_val) + priv->signal_guard_inputs_mask |= 0x01 << i; + } + } + + if (priv->signal_guard_inputs_mask) { + if (priv->id == CAP1293 || priv->id == CAP1298) { + error = regmap_write(priv->regmap, + CAP11XX_REG_SIGNAL_GUARD_ENABLE, + priv->signal_guard_inputs_mask); + if (error) + return error; + } else { + dev_warn(dev, + "This model doesn't support 'signal-guard'\n"); + } + } + + /* Provide some useful defaults */ + for (i = 0; i < priv->model->num_channels; i++) + priv->keycodes[i] = KEY_A + i; + + of_property_read_u32_array(node, "linux,keycodes", + priv->keycodes, priv->model->num_channels); + + /* Disable autorepeat. The Linux input system has its own handling. */ + error = regmap_write(priv->regmap, CAP11XX_REG_REPEAT_RATE, 0); + if (error) + return error; + + return 0; +} + static irqreturn_t cap11xx_thread_func(int irq_num, void *data) { struct cap11xx_priv *priv = data; @@ -332,11 +517,9 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) const struct i2c_device_id *id = i2c_client_get_device_id(i2c_client); struct device *dev = &i2c_client->dev; struct cap11xx_priv *priv; - struct device_node *node; const struct cap11xx_hw_model *cap; - int i, error, irq, gain = 0; + int i, error, irq; unsigned int val, rev; - u32 gain32; if (id->driver_data >= ARRAY_SIZE(cap11xx_devices)) { dev_err(dev, "Invalid device ID %lu\n", id->driver_data); @@ -355,6 +538,8 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) if (!priv) return -ENOMEM; + priv->dev = dev; + priv->regmap = devm_regmap_init_i2c(i2c_client, &cap11xx_regmap_config); if (IS_ERR(priv->regmap)) return PTR_ERR(priv->regmap); @@ -384,50 +569,15 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) return error; dev_info(dev, "CAP11XX detected, model %s, revision 0x%02x\n", - id->name, rev); - node = dev->of_node; - - if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) { - if (cap->no_gain) - dev_warn(dev, - "This version doesn't support sensor gain\n"); - else if (is_power_of_2(gain32) && gain32 <= 8) - gain = ilog2(gain32); - else - dev_err(dev, "Invalid sensor-gain value %d\n", gain32); - } + id->name, rev); - if (id->driver_data == CAP1106 || - id->driver_data == CAP1126 || - id->driver_data == CAP1188) { - if (of_property_read_bool(node, "microchip,irq-active-high")) { - error = regmap_update_bits(priv->regmap, - CAP11XX_REG_CONFIG2, - CAP11XX_REG_CONFIG2_ALT_POL, - 0); - if (error) - return error; - } - } + priv->model = cap; + priv->id = id->driver_data; - /* Provide some useful defaults */ - for (i = 0; i < cap->num_channels; i++) - priv->keycodes[i] = KEY_A + i; - - of_property_read_u32_array(node, "linux,keycodes", - priv->keycodes, cap->num_channels); - - if (!cap->no_gain) { - error = regmap_update_bits(priv->regmap, - CAP11XX_REG_MAIN_CONTROL, - CAP11XX_REG_MAIN_CONTROL_GAIN_MASK, - gain << CAP11XX_REG_MAIN_CONTROL_GAIN_SHIFT); - if (error) - return error; - } + dev_info(dev, "CAP11XX device detected, model %s, revision 0x%02x\n", + id->name, rev); - /* Disable autorepeat. The Linux input system has its own handling. */ - error = regmap_write(priv->regmap, CAP11XX_REG_REPEAT_RATE, 0); + error = cap11xx_init_keys(priv); if (error) return error; @@ -439,7 +589,7 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) priv->idev->id.bustype = BUS_I2C; priv->idev->evbit[0] = BIT_MASK(EV_KEY); - if (of_property_read_bool(node, "autorepeat")) + if (of_property_read_bool(dev->of_node, "autorepeat")) __set_bit(EV_REP, priv->idev->evbit); for (i = 0; i < cap->num_channels; i++) @@ -474,7 +624,7 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) if (error) return error; - irq = irq_of_parse_and_map(node, 0); + irq = irq_of_parse_and_map(dev->of_node, 0); if (!irq) { dev_err(dev, "Unable to parse or map IRQ\n"); return -ENXIO; From patchwork Wed Nov 8 15:56:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Valek - 2N X-Patchwork-Id: 13450270 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5BDEC4167D for ; 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X-OriginatorOrg: axis.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Nov 2023 15:57:08.5725 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f96db592-e659-4fa6-c4e2-08dbe0735ccf X-MS-Exchange-CrossTenant-Id: 78703d3c-b907-432f-b066-88f7af9ca3af X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=78703d3c-b907-432f-b066-88f7af9ca3af;Ip=[195.60.68.100];Helo=[mail.axis.com] X-MS-Exchange-CrossTenant-AuthSource: AM2PEPF0001C714.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR02MB5781 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Separate IRQ parsing is not necessary, I2C core do the job. Signed-off-by: Jiri Valek - 2N --- drivers/input/keyboard/cap11xx.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/input/keyboard/cap11xx.c b/drivers/input/keyboard/cap11xx.c index 4711ea985627..ccca9936ef25 100644 --- a/drivers/input/keyboard/cap11xx.c +++ b/drivers/input/keyboard/cap11xx.c @@ -518,7 +518,7 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) struct device *dev = &i2c_client->dev; struct cap11xx_priv *priv; const struct cap11xx_hw_model *cap; - int i, error, irq; + int i, error; unsigned int val, rev; if (id->driver_data >= ARRAY_SIZE(cap11xx_devices)) { @@ -624,13 +624,7 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client) if (error) return error; - irq = irq_of_parse_and_map(dev->of_node, 0); - if (!irq) { - dev_err(dev, "Unable to parse or map IRQ\n"); - return -ENXIO; - } - - error = devm_request_threaded_irq(dev, irq, NULL, cap11xx_thread_func, + error = devm_request_threaded_irq(dev, i2c_client->irq, NULL, cap11xx_thread_func, IRQF_ONESHOT, dev_name(dev), priv); if (error) return error;