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Commit 07a572e0 authored by Amy Maloche's avatar Amy Maloche Committed by Sudhakar Manapati
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input: synaptics_i2c_rmi4: Enable turning off regulators in suspend 



In order to save maximum power, turn regulators completely off
instead of just putting into low power mode.

This patch is propagated from msm-3.4 kernel.
(commit: c790dc84494b016ffe65f3bc18793ed6bc6d5ff2
input: synaptics_i2c_rmi4: Enable turning off regulators in suspend)
Also cleaned the checkpatch warnings on msm-3.18 kernel.

Change-Id: I43042283dc1e06a8c26fd7b14556180389869059
Signed-off-by: default avatarAmy Maloche <amaloche@codeaurora.org>
Signed-off-by: default avatarSudhakar Manapati <smanap@codeaurora.org>
parent b5ea150d

Documentation/devicetree/bindings/input/touchscreen/synaptics_i2c_rmi4.txt

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ Optional property: 
 - synaptics,panel-x		: panel x dimension

 - synaptics,panel-y		: panel y dimension

 - synaptics,fw-image-name	: name of firmware .img file in /etc/firmware

 - synaptics,power-down		: fully power down regulators in suspend



Example:

	i2c@f9927000 { /* BLSP1 QUP5 */

drivers/input/touchscreen/synaptics_i2c_rmi4.c

+62 −6
Original line number Diff line number Diff line
@@ -1052,6 +1052,8 @@ static int synaptics_rmi4_parse_dt(struct device *dev, 


	rmi4_pdata->i2c_pull_up = of_property_read_bool(np,

			"synaptics,i2c-pull-up");

	rmi4_pdata->power_down_enable = of_property_read_bool(np,

			"synaptics,power-down");

	rmi4_pdata->x_flip = of_property_read_bool(np, "synaptics,x-flip");

	rmi4_pdata->y_flip = of_property_read_bool(np, "synaptics,y-flip");
@@ -1978,7 +1980,7 @@ static int synaptics_rmi4_power_on(struct synaptics_rmi4_data *rmi4_data, 


error_reg_en_vcc_i2c:

	if (rmi4_data->board->i2c_pull_up)

		reg_set_optimum_mode_check(rmi4_data->vdd, 0);

		reg_set_optimum_mode_check(rmi4_data->vcc_i2c, 0);

error_reg_opt_i2c:

	regulator_disable(rmi4_data->vdd);

error_reg_en_vdd:
@@ -2550,27 +2552,51 @@ static int synaptics_rmi4_regulator_lpm(struct synaptics_rmi4_data *rmi4_data, 
						bool on)

{

	int retval;

	int load_ua;



	if (on == false)

		goto regulator_hpm;



	retval = reg_set_optimum_mode_check(rmi4_data->vdd, RMI4_LPM_LOAD_UA);

	load_ua = rmi4_data->board->power_down_enable ? 0 : RMI4_LPM_LOAD_UA;

	retval = reg_set_optimum_mode_check(rmi4_data->vdd, load_ua);

	if (retval < 0) {

		dev_err(&rmi4_data->i2c_client->dev,

			"Regulator vcc_ana set_opt failed rc=%d\n",

			"Regulator vdd_ana set_opt failed rc=%d\n",

			retval);

		goto fail_regulator_lpm;

	}



	if (rmi4_data->board->power_down_enable) {

		retval = regulator_disable(rmi4_data->vdd);

		if (retval) {

			dev_err(&rmi4_data->i2c_client->dev,

				"Regulator vdd disable failed rc=%d\n",

				retval);

			goto fail_regulator_lpm;

		}

	}



	if (rmi4_data->board->i2c_pull_up) {

		load_ua = rmi4_data->board->power_down_enable ?

			0 : RMI4_I2C_LPM_LOAD_UA;

		retval = reg_set_optimum_mode_check(rmi4_data->vcc_i2c,

			RMI4_I2C_LPM_LOAD_UA);

			load_ua);

		if (retval < 0) {

			dev_err(&rmi4_data->i2c_client->dev,

				"Regulator vcc_i2c set_opt failed rc=%d\n",

				retval);

				"Regulator vcc_i2c set_opt failed ",

				"rc=%d\n", retval);

			goto fail_regulator_lpm;

		}



		if (rmi4_data->board->power_down_enable) {

			retval = regulator_disable(rmi4_data->vcc_i2c);

			if (retval) {

				dev_err(&rmi4_data->i2c_client->dev,

					"Regulator vcc_i2c disable failed ",

					"rc=%d\n", retval);

				goto fail_regulator_lpm;

			}

		}

	}



	return 0;
@@ -2586,6 +2612,16 @@ regulator_hpm: 
		goto fail_regulator_hpm;

	}



	if (rmi4_data->board->power_down_enable) {

		retval = regulator_enable(rmi4_data->vdd);

		if (retval) {

			dev_err(&rmi4_data->i2c_client->dev,

				"Regulator vdd enable failed rc=%d\n",

				retval);

			goto fail_regulator_hpm;

		}

	}



	if (rmi4_data->board->i2c_pull_up) {

		retval = reg_set_optimum_mode_check(rmi4_data->vcc_i2c,

			RMI4_I2C_LOAD_UA);
@@ -2595,6 +2631,26 @@ regulator_hpm: 
				retval);

			goto fail_regulator_hpm;

		}



		if (rmi4_data->board->power_down_enable) {

			retval = regulator_enable(rmi4_data->vcc_i2c);

			if (retval) {

				dev_err(&rmi4_data->i2c_client->dev,

					"Regulator vcc_i2c enable failed ",

					"rc=%d\n", retval);

				goto fail_regulator_hpm;

			}

		}

	}



	if (rmi4_data->board->power_down_enable) {

		retval = synaptics_rmi4_reset_device(rmi4_data);

		if (retval < 0) {

			dev_err(&rmi4_data->i2c_client->dev,

				"%s: Failed to issue reset command, rc = %d\n",

					__func__, retval);

			return retval;

		}

	}



	return 0;

include/linux/input/synaptics_dsx.h

+4 −0
Original line number Diff line number Diff line
@@ -35,8 +35,11 @@ struct synaptics_rmi4_capacitance_button_map { 
 * struct synaptics_rmi4_platform_data - rmi4 platform data

 * @x_flip: x flip flag

 * @y_flip: y flip flag

 * @i2c_pull_up: pull up i2c bus with regulator

 * @power_down_enable: enable complete regulator shutdown in suspend

 * @irq_gpio: attention interrupt gpio

 * @irq_flags: flags used by the irq

 * @reset_flags: flags used by reset line

 * @reset_gpio: reset gpio

 * @panel_x: panel maximum values on the x

 * @panel_y: panel maximum values on the y
@@ -47,6 +50,7 @@ struct synaptics_rmi4_platform_data { 
	bool x_flip;

	bool y_flip;

	bool i2c_pull_up;

	bool power_down_enable;

	unsigned irq_gpio;

	u32 irq_flags;

	u32 reset_flags;