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bdk: touch: reorder power on
So touch IC reset can be properly done on a fast power cycle.
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@ -401,23 +401,29 @@ static int touch_init()
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int touch_power_on()
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{
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// Enable LDO6 for touchscreen AVDD supply.
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max7762x_regulator_set_voltage(REGULATOR_LDO6, 2900000);
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max7762x_regulator_enable(REGULATOR_LDO6, true);
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// Configure touchscreen VDD GPIO.
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PINMUX_AUX(PINMUX_AUX_DAP4_SCLK) = PINMUX_PULL_DOWN | 1;
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gpio_direction_output(GPIO_PORT_J, GPIO_PIN_7, GPIO_HIGH);
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// Configure Touscreen and GCAsic shared GPIO.
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PINMUX_AUX(PINMUX_AUX_CAM_I2C_SDA) = PINMUX_LPDR | PINMUX_INPUT_ENABLE | PINMUX_TRISTATE | PINMUX_PULL_UP | 2;
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PINMUX_AUX(PINMUX_AUX_CAM_I2C_SCL) = PINMUX_IO_HV | PINMUX_LPDR | PINMUX_TRISTATE | PINMUX_PULL_DOWN | 2;
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PINMUX_AUX(PINMUX_AUX_CAM_I2C_SCL) = PINMUX_IO_HV | PINMUX_LPDR | PINMUX_TRISTATE | PINMUX_PULL_DOWN | 2; // Unused.
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gpio_config(GPIO_PORT_S, GPIO_PIN_3, GPIO_MODE_GPIO); // GC detect.
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// Configure touchscreen Touch Reset pin.
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PINMUX_AUX(PINMUX_AUX_DAP4_SCLK) = PINMUX_PULL_DOWN | 1;
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gpio_direction_output(GPIO_PORT_J, GPIO_PIN_7, GPIO_LOW);
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usleep(20);
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// Enable LDO6 for touchscreen AVDD and DVDD supply.
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max7762x_regulator_set_voltage(REGULATOR_LDO6, 2900000);
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max7762x_regulator_enable(REGULATOR_LDO6, true);
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// Initialize I2C3.
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pinmux_config_i2c(I2C_3);
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clock_enable_i2c(I2C_3);
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i2c_init(I2C_3);
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usleep(1000);
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// Set Touch Reset pin.
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gpio_write(GPIO_PORT_J, GPIO_PIN_7, GPIO_HIGH);
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usleep(10000);
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// Wait for the touchscreen module to get ready.
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touch_wait_event(STMFTS_EV_CONTROLLER_READY, 0, 20, NULL);
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