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LM3532 backlight driver improvements and relocation
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQUwxxKyE5l/npt8ARiEGxRG/Sl2wUCXKpGTgAKCRBiEGxRG/Sl 2/NgAP9OKSCZsbOAaZNgoyNf9x0biGQ2tPHqbx7tIvkE/i76RAEA2GWer+DBBx9x V2/96RAtP/xTV9UMY2DwIUTwTEAbDwQ= =4jHV -----END PGP SIGNATURE----- Merge tag 'lm3532-driver-improvements' into for-next Merge immutable branch between LEDs, MFD and OMAP Device Tree due to LM3532 backlight driver improvements and relocation. * tag 'lm3532-driver-improvements': leds: lm3532: Introduce the lm3532 LED driver mfd: ti-lmu: Remove LM3532 backlight driver references ARM: dts: omap4-droid4: Update backlight dt properties dt: lm3532: Add lm3532 dt doc and update ti_lmu doc
This commit is contained in:
Jacek Anaszewski
commit
174c9526ac
101
Documentation/devicetree/bindings/leds/leds-lm3532.txt
Normal file
101
Documentation/devicetree/bindings/leds/leds-lm3532.txt
Normal file
@ -0,0 +1,101 @@
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* Texas Instruments - lm3532 White LED driver with ambient light sensing
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capability.
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The LM3532 provides the 3 high-voltage, low-side current sinks. The device is
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programmable over an I2C-compatible interface and has independent
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current control for all three channels. The adaptive current regulation
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method allows for different LED currents in each current sink thus allowing
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for a wide variety of backlight and keypad applications.
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The main features of the LM3532 include dual ambient light sensor inputs
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each with 32 internal voltage setting resistors, 8-bit logarithmic and linear
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brightness control, dual external PWM brightness control inputs, and up to
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1000:1 dimming ratio with programmable fade in and fade out settings.
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Required properties:
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- compatible : "ti,lm3532"
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- reg : I2C slave address
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- #address-cells : 1
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- #size-cells : 0
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Optional properties:
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- enable-gpios : gpio pin to enable (active high)/disable the device.
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- ramp-up-us - The Run time ramp rates/step are from one current
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set-point to another after the device has reached its
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initial target set point from turn-on
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- ramp-down-us - The Run time ramp rates/step are from one current
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set-point to another after the device has reached its
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initial target set point from turn-on
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Range for ramp settings: 8us - 65536us
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Optional properties if ALS mode is used:
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- ti,als-vmin - Minimum ALS voltage defined in Volts
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- ti,als-vmax - Maximum ALS voltage defined in Volts
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Per the data sheet the max ALS voltage is 2V and the min is 0V
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- ti,als1-imp-sel - ALS1 impedance resistor selection in Ohms
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- ti,als2-imp-sel - ALS2 impedance resistor selection in Ohms
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Range for impedance select: 37000 Ohms - 1190 Ohms
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Values above 37kohms will be set to the "High Impedance" setting
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- ti,als-avrg-time-us - Determines the length of time the device needs to
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average the two ALS inputs. This is only used if
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the input mode is LM3532_ALS_INPUT_AVRG.
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Range: 17920us - 2293760us
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- ti,als-input-mode - Determines how the device uses the attached ALS
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devices.
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0x00 - ALS1 and ALS2 input average
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0x01 - ALS1 Input
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0x02 - ALS2 Input
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0x03 - Max of ALS1 and ALS2
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Required child properties:
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- reg : Indicates control bank the LED string is controlled by
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- led-sources : see Documentation/devicetree/bindings/leds/common.txt
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- ti,led-mode : Defines if the LED strings are manually controlled or
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if the LED strings are controlled by the ALS.
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0x00 - LED strings are I2C controlled via full scale
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brightness control register
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0x01 - LED strings are ALS controlled
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Optional LED child properties:
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- label : see Documentation/devicetree/bindings/leds/common.txt
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- linux,default-trigger :
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see Documentation/devicetree/bindings/leds/common.txt
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Example:
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led-controller@38 {
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compatible = "ti,lm3532";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x38>;
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enable-gpios = <&gpio6 12 GPIO_ACTIVE_HIGH>;
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ramp-up-us = <1024>;
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ramp-down-us = <65536>;
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ti,als-vmin = <0>;
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ti,als-vmax = <2000>;
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ti,als1-imp-sel = <4110>;
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ti,als2-imp-sel = <2180>;
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ti,als-avrg-time-us = <17920>;
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ti,als-input-mode = <0x00>;
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led@0 {
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reg = <0>;
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led-sources = <2>;
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ti,led-mode = <1>;
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label = ":backlight";
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linux,default-trigger = "backlight";
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};
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led@1 {
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reg = <1>;
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led-sources = <1>;
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ti,led-mode = <0>;
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label = ":kbd_backlight";
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};
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};
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For more product information please see the links below:
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http://www.ti.com/product/LM3532
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@ -4,7 +4,6 @@ TI LMU driver supports lighting devices below.
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Name Child nodes
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------ ---------------------------------
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LM3532 Backlight
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LM3631 Backlight and regulator
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LM3632 Backlight and regulator
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LM3633 Backlight, LED and fault monitor
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@ -13,7 +12,6 @@ TI LMU driver supports lighting devices below.
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Required properties:
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- compatible: Should be one of:
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"ti,lm3532"
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"ti,lm3631"
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"ti,lm3632"
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"ti,lm3633"
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@ -23,7 +21,6 @@ Required properties:
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0x11 for LM3632
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0x29 for LM3631
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0x36 for LM3633, LM3697
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0x38 for LM3532
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0x63 for LM3695
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Optional property:
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@ -47,23 +44,6 @@ Optional nodes:
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[2] ../leds/leds-lm3633.txt
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[3] ../regulator/lm363x-regulator.txt
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lm3532@38 {
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compatible = "ti,lm3532";
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reg = <0x38>;
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enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
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backlight {
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compatible = "ti,lm3532-backlight";
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lcd {
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led-sources = <0 1 2>;
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ramp-up-msec = <30>;
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ramp-down-msec = <0>;
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};
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};
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};
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lm3631@29 {
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compatible = "ti,lm3631";
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reg = <0x29>;
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@ -214,7 +214,6 @@
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width-mm = <50>;
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height-mm = <89>;
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backlight = <&lcd_backlight>;
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panel-timing {
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clock-frequency = <0>; /* Calculated by dsi */
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@ -383,20 +382,30 @@
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};
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&i2c1 {
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lm3532@38 {
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led-controller@38 {
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compatible = "ti,lm3532";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x38>;
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enable-gpios = <&gpio6 12 GPIO_ACTIVE_HIGH>;
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lcd_backlight: backlight {
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compatible = "ti,lm3532-backlight";
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ramp-up-us = <1024>;
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ramp-down-us = <8193>;
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lcd {
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led-sources = <0 1 2>;
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ramp-up-msec = <1>;
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ramp-down-msec = <0>;
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};
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led@0 {
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reg = <0>;
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led-sources = <2>;
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ti,led-mode = <0>;
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label = ":backlight";
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linux,default-trigger = "backlight";
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};
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led@1 {
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reg = <1>;
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led-sources = <1>;
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ti,led-mode = <0>;
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label = ":kbd_backlight";
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};
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};
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};
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@ -138,6 +138,16 @@ config LEDS_LM3530
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controlled manually or using PWM input or using ambient
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light automatically.
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config LEDS_LM3532
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tristate "LCD Backlight driver for LM3532"
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depends on LEDS_CLASS
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depends on I2C
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help
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This option enables support for the LCD backlight using
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LM3532 ambient light sensor chip. This ALS chip can be
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controlled manually or using PWM input or using ambient
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light automatically.
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config LEDS_LM3533
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tristate "LED support for LM3533"
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depends on LEDS_CLASS
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@ -18,6 +18,7 @@ obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o
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obj-$(CONFIG_LEDS_CPCAP) += leds-cpcap.o
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obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o
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obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o
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obj-$(CONFIG_LEDS_LM3532) += leds-lm3532.o
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obj-$(CONFIG_LEDS_LM3533) += leds-lm3533.o
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obj-$(CONFIG_LEDS_LM3642) += leds-lm3642.o
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obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o
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683
drivers/leds/leds-lm3532.c
Normal file
683
drivers/leds/leds-lm3532.c
Normal file
@ -0,0 +1,683 @@
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// SPDX-License-Identifier: GPL-2.0
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// TI LM3532 LED driver
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// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
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#include <linux/i2c.h>
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#include <linux/leds.h>
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#include <linux/slab.h>
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#include <linux/regmap.h>
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#include <linux/types.h>
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#include <linux/regulator/consumer.h>
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#include <linux/module.h>
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#include <uapi/linux/uleds.h>
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#include <linux/gpio/consumer.h>
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#define LM3532_NAME "lm3532-led"
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#define LM3532_BL_MODE_MANUAL 0x00
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#define LM3532_BL_MODE_ALS 0x01
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#define LM3532_REG_OUTPUT_CFG 0x10
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#define LM3532_REG_STARTSHUT_RAMP 0x11
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#define LM3532_REG_RT_RAMP 0x12
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#define LM3532_REG_PWM_A_CFG 0x13
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#define LM3532_REG_PWM_B_CFG 0x14
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#define LM3532_REG_PWM_C_CFG 0x15
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#define LM3532_REG_ZONE_CFG_A 0x16
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#define LM3532_REG_CTRL_A_BRT 0x17
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#define LM3532_REG_ZONE_CFG_B 0x18
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#define LM3532_REG_CTRL_B_BRT 0x19
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#define LM3532_REG_ZONE_CFG_C 0x1a
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#define LM3532_REG_CTRL_C_BRT 0x1b
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#define LM3532_REG_ENABLE 0x1d
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#define LM3532_ALS_CONFIG 0x23
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#define LM3532_REG_ZN_0_HI 0x60
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#define LM3532_REG_ZN_0_LO 0x61
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#define LM3532_REG_ZN_1_HI 0x62
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#define LM3532_REG_ZN_1_LO 0x63
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#define LM3532_REG_ZN_2_HI 0x64
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#define LM3532_REG_ZN_2_LO 0x65
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#define LM3532_REG_ZN_3_HI 0x66
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#define LM3532_REG_ZN_3_LO 0x67
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#define LM3532_REG_MAX 0x7e
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/* Contorl Enable */
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#define LM3532_CTRL_A_ENABLE BIT(0)
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#define LM3532_CTRL_B_ENABLE BIT(1)
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#define LM3532_CTRL_C_ENABLE BIT(2)
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/* PWM Zone Control */
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#define LM3532_PWM_ZONE_MASK 0x7c
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#define LM3532_PWM_ZONE_0_EN BIT(2)
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#define LM3532_PWM_ZONE_1_EN BIT(3)
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#define LM3532_PWM_ZONE_2_EN BIT(4)
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#define LM3532_PWM_ZONE_3_EN BIT(5)
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#define LM3532_PWM_ZONE_4_EN BIT(6)
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/* Brightness Configuration */
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#define LM3532_I2C_CTRL BIT(0)
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#define LM3532_ALS_CTRL 0
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#define LM3532_LINEAR_MAP BIT(1)
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#define LM3532_ZONE_MASK (BIT(2) | BIT(3) | BIT(4))
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#define LM3532_ZONE_0 0
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#define LM3532_ZONE_1 BIT(2)
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#define LM3532_ZONE_2 BIT(3)
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#define LM3532_ZONE_3 (BIT(2) | BIT(3))
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#define LM3532_ZONE_4 BIT(4)
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#define LM3532_ENABLE_ALS BIT(3)
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#define LM3532_ALS_SEL_SHIFT 6
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/* Zone Boundary Register */
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#define LM3532_ALS_WINDOW_mV 2000
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#define LM3532_ALS_ZB_MAX 4
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#define LM3532_ALS_OFFSET_mV 2
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#define LM3532_CONTROL_A 0
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#define LM3532_CONTROL_B 1
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#define LM3532_CONTROL_C 2
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#define LM3532_MAX_CONTROL_BANKS 3
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#define LM3532_MAX_LED_STRINGS 3
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#define LM3532_OUTPUT_CFG_MASK 0x3
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#define LM3532_BRT_VAL_ADJUST 8
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#define LM3532_RAMP_DOWN_SHIFT 3
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#define LM3532_NUM_RAMP_VALS 8
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#define LM3532_NUM_AVG_VALS 8
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#define LM3532_NUM_IMP_VALS 32
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/*
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* struct lm3532_als_data
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* @config - value of ALS configuration register
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* @als1_imp_sel - value of ALS1 resistor select register
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* @als2_imp_sel - value of ALS2 resistor select register
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* @als_avrg_time - ALS averaging time
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* @als_input_mode - ALS input mode for brightness control
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* @als_vmin - Minimum ALS voltage
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* @als_vmax - Maximum ALS voltage
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* @zone_lo - values of ALS lo ZB(Zone Boundary) registers
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* @zone_hi - values of ALS hi ZB(Zone Boundary) registers
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*/
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struct lm3532_als_data {
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u8 config;
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u8 als1_imp_sel;
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u8 als2_imp_sel;
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u8 als_avrg_time;
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u8 als_input_mode;
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u32 als_vmin;
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u32 als_vmax;
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u8 zones_lo[LM3532_ALS_ZB_MAX];
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u8 zones_hi[LM3532_ALS_ZB_MAX];
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||||
};
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/**
|
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* struct lm3532_led
|
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* @led_dev: led class device
|
||||
* @priv - Pointer the device data structure
|
||||
* @control_bank - Control bank the LED is associated to
|
||||
* @mode - Mode of the LED string
|
||||
* @num_leds - Number of LED strings are supported in this array
|
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* @led_strings - The LED strings supported in this array
|
||||
* @label - LED label
|
||||
*/
|
||||
struct lm3532_led {
|
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struct led_classdev led_dev;
|
||||
struct lm3532_data *priv;
|
||||
|
||||
int control_bank;
|
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int mode;
|
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int num_leds;
|
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u32 led_strings[LM3532_MAX_CONTROL_BANKS];
|
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char label[LED_MAX_NAME_SIZE];
|
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};
|
||||
|
||||
/**
|
||||
* struct lm3532_data
|
||||
* @enable_gpio - Hardware enable gpio
|
||||
* @regulator: regulator
|
||||
* @client: i2c client
|
||||
* @regmap - Devices register map
|
||||
* @dev - Pointer to the devices device struct
|
||||
* @lock - Lock for reading/writing the device
|
||||
* @als_data - Pointer to the als data struct
|
||||
* @runtime_ramp_up - Runtime ramp up setting
|
||||
* @runtime_ramp_down - Runtime ramp down setting
|
||||
* @leds - Array of LED strings
|
||||
*/
|
||||
struct lm3532_data {
|
||||
struct gpio_desc *enable_gpio;
|
||||
struct regulator *regulator;
|
||||
struct i2c_client *client;
|
||||
struct regmap *regmap;
|
||||
struct device *dev;
|
||||
struct mutex lock;
|
||||
|
||||
struct lm3532_als_data *als_data;
|
||||
|
||||
u32 runtime_ramp_up;
|
||||
u32 runtime_ramp_down;
|
||||
|
||||
struct lm3532_led leds[];
|
||||
};
|
||||
|
||||
static const struct reg_default lm3532_reg_defs[] = {
|
||||
{LM3532_REG_OUTPUT_CFG, 0xe4},
|
||||
{LM3532_REG_STARTSHUT_RAMP, 0xc0},
|
||||
{LM3532_REG_RT_RAMP, 0xc0},
|
||||
{LM3532_REG_PWM_A_CFG, 0x82},
|
||||
{LM3532_REG_PWM_B_CFG, 0x82},
|
||||
{LM3532_REG_PWM_C_CFG, 0x82},
|
||||
{LM3532_REG_ZONE_CFG_A, 0xf1},
|
||||
{LM3532_REG_CTRL_A_BRT, 0xf3},
|
||||
{LM3532_REG_ZONE_CFG_B, 0xf1},
|
||||
{LM3532_REG_CTRL_B_BRT, 0xf3},
|
||||
{LM3532_REG_ZONE_CFG_C, 0xf1},
|
||||
{LM3532_REG_CTRL_C_BRT, 0xf3},
|
||||
{LM3532_REG_ENABLE, 0xf8},
|
||||
{LM3532_ALS_CONFIG, 0x44},
|
||||
{LM3532_REG_ZN_0_HI, 0x35},
|
||||
{LM3532_REG_ZN_0_LO, 0x33},
|
||||
{LM3532_REG_ZN_1_HI, 0x6a},
|
||||
{LM3532_REG_ZN_1_LO, 0x66},
|
||||
{LM3532_REG_ZN_2_HI, 0xa1},
|
||||
{LM3532_REG_ZN_2_LO, 0x99},
|
||||
{LM3532_REG_ZN_3_HI, 0xdc},
|
||||
{LM3532_REG_ZN_3_LO, 0xcc},
|
||||
};
|
||||
|
||||
static const struct regmap_config lm3532_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
|
||||
.max_register = LM3532_REG_MAX,
|
||||
.reg_defaults = lm3532_reg_defs,
|
||||
.num_reg_defaults = ARRAY_SIZE(lm3532_reg_defs),
|
||||
.cache_type = REGCACHE_FLAT,
|
||||
};
|
||||
|
||||
const static int als_imp_table[LM3532_NUM_IMP_VALS] = {37000, 18500, 12330,
|
||||
92500, 7400, 6170, 5290,
|
||||
4630, 4110, 3700, 3360,
|
||||
3080, 2850, 2640, 2440,
|
||||
2310, 2180, 2060, 1950,
|
||||
1850, 1760, 1680, 1610,
|
||||
1540, 1480, 1420, 1370,
|
||||
1320, 1280, 1230, 1190};
|
||||
static int lm3532_get_als_imp_index(int als_imped)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (als_imped > als_imp_table[1])
|
||||
return 0;
|
||||
|
||||
if (als_imped < als_imp_table[LM3532_NUM_IMP_VALS - 1])
|
||||
return LM3532_NUM_IMP_VALS - 1;
|
||||
|
||||
for (i = 1; i < LM3532_NUM_IMP_VALS; i++) {
|
||||
if (als_imped == als_imp_table[i])
|
||||
return i;
|
||||
|
||||
/* Find an approximate index by looking up the table */
|
||||
if (als_imped < als_imp_table[i - 1] &&
|
||||
als_imped > als_imp_table[i]) {
|
||||
if (als_imped - als_imp_table[i - 1] <
|
||||
als_imp_table[i] - als_imped)
|
||||
return i + 1;
|
||||
else
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int lm3532_get_index(const int table[], int size, int value)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 1; i < size; i++) {
|
||||
if (value == table[i])
|
||||
return i;
|
||||
|
||||
/* Find an approximate index by looking up the table */
|
||||
if (value > table[i - 1] &&
|
||||
value < table[i]) {
|
||||
if (value - table[i - 1] < table[i] - value)
|
||||
return i - 1;
|
||||
else
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
const static int als_avrg_table[LM3532_NUM_AVG_VALS] = {17920, 35840, 71680,
|
||||
1433360, 286720, 573440,
|
||||
1146880, 2293760};
|
||||
static int lm3532_get_als_avg_index(int avg_time)
|
||||
{
|
||||
if (avg_time <= als_avrg_table[0])
|
||||
return 0;
|
||||
|
||||
if (avg_time > als_avrg_table[LM3532_NUM_AVG_VALS - 1])
|
||||
return LM3532_NUM_AVG_VALS - 1;
|
||||
|
||||
return lm3532_get_index(&als_avrg_table[0], LM3532_NUM_AVG_VALS,
|
||||
avg_time);
|
||||
}
|
||||
|
||||
const static int ramp_table[LM3532_NUM_RAMP_VALS] = { 8, 1024, 2048, 4096, 8192,
|
||||
16384, 32768, 65536};
|
||||
static int lm3532_get_ramp_index(int ramp_time)
|
||||
{
|
||||
if (ramp_time <= ramp_table[0])
|
||||
return 0;
|
||||
|
||||
if (ramp_time > ramp_table[LM3532_NUM_RAMP_VALS - 1])
|
||||
return LM3532_NUM_RAMP_VALS - 1;
|
||||
|
||||
return lm3532_get_index(&ramp_table[0], LM3532_NUM_RAMP_VALS,
|
||||
ramp_time);
|
||||
}
|
||||
|
||||
static int lm3532_led_enable(struct lm3532_led *led_data)
|
||||
{
|
||||
int ctrl_en_val = BIT(led_data->control_bank);
|
||||
int ret;
|
||||
|
||||
ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
|
||||
ctrl_en_val, ctrl_en_val);
|
||||
if (ret) {
|
||||
dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return regulator_enable(led_data->priv->regulator);
|
||||
}
|
||||
|
||||
static int lm3532_led_disable(struct lm3532_led *led_data)
|
||||
{
|
||||
int ctrl_en_val = BIT(led_data->control_bank);
|
||||
int ret;
|
||||
|
||||
ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
|
||||
ctrl_en_val, ~ctrl_en_val);
|
||||
if (ret) {
|
||||
dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return regulator_disable(led_data->priv->regulator);
|
||||
}
|
||||
|
||||
static int lm3532_brightness_set(struct led_classdev *led_cdev,
|
||||
enum led_brightness brt_val)
|
||||
{
|
||||
struct lm3532_led *led =
|
||||
container_of(led_cdev, struct lm3532_led, led_dev);
|
||||
u8 brightness_reg;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&led->priv->lock);
|
||||
|
||||
if (led->mode == LM3532_BL_MODE_ALS) {
|
||||
if (brt_val > LED_OFF)
|
||||
ret = lm3532_led_enable(led);
|
||||
else
|
||||
ret = lm3532_led_disable(led);
|
||||
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
if (brt_val == LED_OFF) {
|
||||
ret = lm3532_led_disable(led);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
ret = lm3532_led_enable(led);
|
||||
if (ret)
|
||||
goto unlock;
|
||||
|
||||
brightness_reg = LM3532_REG_CTRL_A_BRT + led->control_bank * 2;
|
||||
brt_val = brt_val / LM3532_BRT_VAL_ADJUST;
|
||||
|
||||
ret = regmap_write(led->priv->regmap, brightness_reg, brt_val);
|
||||
|
||||
unlock:
|
||||
mutex_unlock(&led->priv->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lm3532_init_registers(struct lm3532_led *led)
|
||||
{
|
||||
struct lm3532_data *drvdata = led->priv;
|
||||
unsigned int runtime_ramp_val;
|
||||
unsigned int output_cfg_val = 0;
|
||||
unsigned int output_cfg_shift = 0;
|
||||
unsigned int output_cfg_mask = 0;
|
||||
int ret, i;
|
||||
|
||||
for (i = 0; i < led->num_leds; i++) {
|
||||
output_cfg_shift = led->led_strings[i] * 2;
|
||||
output_cfg_val |= (led->control_bank << output_cfg_shift);
|
||||
output_cfg_mask |= LM3532_OUTPUT_CFG_MASK << output_cfg_shift;
|
||||
}
|
||||
|
||||
ret = regmap_update_bits(drvdata->regmap, LM3532_REG_OUTPUT_CFG,
|
||||
output_cfg_mask, output_cfg_val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
runtime_ramp_val = drvdata->runtime_ramp_up |
|
||||
(drvdata->runtime_ramp_down << LM3532_RAMP_DOWN_SHIFT);
|
||||
|
||||
return regmap_write(drvdata->regmap, LM3532_REG_RT_RAMP,
|
||||
runtime_ramp_val);
|
||||
}
|
||||
|
||||
static int lm3532_als_configure(struct lm3532_data *priv,
|
||||
struct lm3532_led *led)
|
||||
{
|
||||
struct lm3532_als_data *als = priv->als_data;
|
||||
u32 als_vmin, als_vmax, als_vstep;
|
||||
int zone_reg = LM3532_REG_ZN_0_HI;
|
||||
int brightnes_config_reg;
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
als_vmin = als->als_vmin;
|
||||
als_vmax = als->als_vmax;
|
||||
|
||||
als_vstep = (als_vmax - als_vmin) / ((LM3532_ALS_ZB_MAX + 1) * 2);
|
||||
|
||||
for (i = 0; i < LM3532_ALS_ZB_MAX; i++) {
|
||||
als->zones_lo[i] = ((als_vmin + als_vstep + (i * als_vstep)) *
|
||||
LED_FULL) / 1000;
|
||||
als->zones_hi[i] = ((als_vmin + LM3532_ALS_OFFSET_mV +
|
||||
als_vstep + (i * als_vstep)) * LED_FULL) / 1000;
|
||||
|
||||
zone_reg = LM3532_REG_ZN_0_HI + i * 2;
|
||||
ret = regmap_write(priv->regmap, zone_reg, als->zones_lo[i]);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
zone_reg += 1;
|
||||
ret = regmap_write(priv->regmap, zone_reg, als->zones_hi[i]);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
als->config = (als->als_avrg_time | (LM3532_ENABLE_ALS) |
|
||||
(als->als_input_mode << LM3532_ALS_SEL_SHIFT));
|
||||
|
||||
ret = regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
brightnes_config_reg = LM3532_REG_ZONE_CFG_A + led->control_bank * 2;
|
||||
|
||||
return regmap_update_bits(priv->regmap, brightnes_config_reg,
|
||||
LM3532_I2C_CTRL, LM3532_ALS_CTRL);
|
||||
}
|
||||
|
||||
static int lm3532_parse_als(struct lm3532_data *priv)
|
||||
{
|
||||
struct lm3532_als_data *als;
|
||||
int als_avg_time;
|
||||
int als_impedance;
|
||||
int ret;
|
||||
|
||||
als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL);
|
||||
if (als == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ti,als-vmin",
|
||||
&als->als_vmin);
|
||||
if (ret)
|
||||
als->als_vmin = 0;
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ti,als-vmax",
|
||||
&als->als_vmax);
|
||||
if (ret)
|
||||
als->als_vmax = LM3532_ALS_WINDOW_mV;
|
||||
|
||||
if (als->als_vmax > LM3532_ALS_WINDOW_mV) {
|
||||
ret = -EINVAL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ti,als1-imp-sel",
|
||||
&als_impedance);
|
||||
if (ret)
|
||||
als->als1_imp_sel = 0;
|
||||
else
|
||||
als->als1_imp_sel = lm3532_get_als_imp_index(als_impedance);
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ti,als2-imp-sel",
|
||||
&als_impedance);
|
||||
if (ret)
|
||||
als->als2_imp_sel = 0;
|
||||
else
|
||||
als->als2_imp_sel = lm3532_get_als_imp_index(als_impedance);
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ti,als-avrg-time-us",
|
||||
&als_avg_time);
|
||||
if (ret)
|
||||
als->als_avrg_time = 0;
|
||||
else
|
||||
als->als_avrg_time = lm3532_get_als_avg_index(als_avg_time);
|
||||
|
||||
ret = device_property_read_u8(&priv->client->dev, "ti,als-input-mode",
|
||||
&als->als_input_mode);
|
||||
if (ret)
|
||||
als->als_input_mode = 0;
|
||||
|
||||
if (als->als_input_mode > LM3532_BL_MODE_ALS) {
|
||||
ret = -EINVAL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
priv->als_data = als;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lm3532_parse_node(struct lm3532_data *priv)
|
||||
{
|
||||
struct fwnode_handle *child = NULL;
|
||||
struct lm3532_led *led;
|
||||
const char *name;
|
||||
int control_bank;
|
||||
u32 ramp_time;
|
||||
size_t i = 0;
|
||||
int ret;
|
||||
|
||||
priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
|
||||
"enable", GPIOD_OUT_LOW);
|
||||
if (IS_ERR(priv->enable_gpio))
|
||||
priv->enable_gpio = NULL;
|
||||
|
||||
priv->regulator = devm_regulator_get(&priv->client->dev, "vin");
|
||||
if (IS_ERR(priv->regulator))
|
||||
priv->regulator = NULL;
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ramp-up-us",
|
||||
&ramp_time);
|
||||
if (ret)
|
||||
dev_info(&priv->client->dev, "ramp-up-ms property missing\n");
|
||||
else
|
||||
priv->runtime_ramp_up = lm3532_get_ramp_index(ramp_time);
|
||||
|
||||
ret = device_property_read_u32(&priv->client->dev, "ramp-down-us",
|
||||
&ramp_time);
|
||||
if (ret)
|
||||
dev_info(&priv->client->dev, "ramp-down-ms property missing\n");
|
||||
else
|
||||
priv->runtime_ramp_down = lm3532_get_ramp_index(ramp_time);
|
||||
|
||||
device_for_each_child_node(priv->dev, child) {
|
||||
led = &priv->leds[i];
|
||||
|
||||
ret = fwnode_property_read_u32(child, "reg", &control_bank);
|
||||
if (ret) {
|
||||
dev_err(&priv->client->dev, "reg property missing\n");
|
||||
fwnode_handle_put(child);
|
||||
goto child_out;
|
||||
}
|
||||
|
||||
if (control_bank > LM3532_CONTROL_C) {
|
||||
dev_err(&priv->client->dev, "Control bank invalid\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
led->control_bank = control_bank;
|
||||
|
||||
ret = fwnode_property_read_u32(child, "ti,led-mode",
|
||||
&led->mode);
|
||||
if (ret) {
|
||||
dev_err(&priv->client->dev, "ti,led-mode property missing\n");
|
||||
fwnode_handle_put(child);
|
||||
goto child_out;
|
||||
}
|
||||
|
||||
if (led->mode == LM3532_BL_MODE_ALS) {
|
||||
ret = lm3532_parse_als(priv);
|
||||
if (ret)
|
||||
dev_err(&priv->client->dev, "Failed to parse als\n");
|
||||
else
|
||||
lm3532_als_configure(priv, led);
|
||||
}
|
||||
|
||||
led->num_leds = fwnode_property_read_u32_array(child,
|
||||
"led-sources",
|
||||
NULL, 0);
|
||||
|
||||
if (led->num_leds > LM3532_MAX_LED_STRINGS) {
|
||||
dev_err(&priv->client->dev, "To many LED string defined\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
ret = fwnode_property_read_u32_array(child, "led-sources",
|
||||
led->led_strings,
|
||||
led->num_leds);
|
||||
if (ret) {
|
||||
dev_err(&priv->client->dev, "led-sources property missing\n");
|
||||
fwnode_handle_put(child);
|
||||
goto child_out;
|
||||
}
|
||||
|
||||
fwnode_property_read_string(child, "linux,default-trigger",
|
||||
&led->led_dev.default_trigger);
|
||||
|
||||
ret = fwnode_property_read_string(child, "label", &name);
|
||||
if (ret)
|
||||
snprintf(led->label, sizeof(led->label),
|
||||
"%s::", priv->client->name);
|
||||
else
|
||||
snprintf(led->label, sizeof(led->label),
|
||||
"%s:%s", priv->client->name, name);
|
||||
|
||||
led->priv = priv;
|
||||
led->led_dev.name = led->label;
|
||||
led->led_dev.brightness_set_blocking = lm3532_brightness_set;
|
||||
|
||||
ret = devm_led_classdev_register(priv->dev, &led->led_dev);
|
||||
if (ret) {
|
||||
dev_err(&priv->client->dev, "led register err: %d\n",
|
||||
ret);
|
||||
fwnode_handle_put(child);
|
||||
goto child_out;
|
||||
}
|
||||
|
||||
lm3532_init_registers(led);
|
||||
|
||||
i++;
|
||||
}
|
||||
|
||||
child_out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lm3532_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct lm3532_data *drvdata;
|
||||
int ret = 0;
|
||||
int count;
|
||||
|
||||
count = device_get_child_node_count(&client->dev);
|
||||
if (!count) {
|
||||
dev_err(&client->dev, "LEDs are not defined in device tree!");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
drvdata = devm_kzalloc(&client->dev, struct_size(drvdata, leds, count),
|
||||
GFP_KERNEL);
|
||||
if (drvdata == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
drvdata->client = client;
|
||||
drvdata->dev = &client->dev;
|
||||
|
||||
drvdata->regmap = devm_regmap_init_i2c(client, &lm3532_regmap_config);
|
||||
if (IS_ERR(drvdata->regmap)) {
|
||||
ret = PTR_ERR(drvdata->regmap);
|
||||
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
||||
ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
mutex_init(&drvdata->lock);
|
||||
i2c_set_clientdata(client, drvdata);
|
||||
|
||||
ret = lm3532_parse_node(drvdata);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "Failed to parse node\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (drvdata->enable_gpio)
|
||||
gpiod_direction_output(drvdata->enable_gpio, 1);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lm3532_remove(struct i2c_client *client)
|
||||
{
|
||||
struct lm3532_data *drvdata = i2c_get_clientdata(client);
|
||||
|
||||
mutex_destroy(&drvdata->lock);
|
||||
|
||||
if (drvdata->enable_gpio)
|
||||
gpiod_direction_output(drvdata->enable_gpio, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id of_lm3532_leds_match[] = {
|
||||
{ .compatible = "ti,lm3532", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, of_lm3532_leds_match);
|
||||
|
||||
static const struct i2c_device_id lm3532_id[] = {
|
||||
{LM3532_NAME, 0},
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, lm3532_id);
|
||||
|
||||
static struct i2c_driver lm3532_i2c_driver = {
|
||||
.probe = lm3532_probe,
|
||||
.remove = lm3532_remove,
|
||||
.id_table = lm3532_id,
|
||||
.driver = {
|
||||
.name = LM3532_NAME,
|
||||
.of_match_table = of_lm3532_leds_match,
|
||||
},
|
||||
};
|
||||
module_i2c_driver(lm3532_i2c_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Back Light driver for LM3532");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|
||||
@ -54,14 +54,6 @@ static void ti_lmu_disable_hw(void *data)
|
||||
gpiod_set_value(lmu->en_gpio, 0);
|
||||
}
|
||||
|
||||
static const struct mfd_cell lm3532_devices[] = {
|
||||
{
|
||||
.name = "ti-lmu-backlight",
|
||||
.id = LM3532,
|
||||
.of_compatible = "ti,lm3532-backlight",
|
||||
},
|
||||
};
|
||||
|
||||
#define LM363X_REGULATOR(_id) \
|
||||
{ \
|
||||
.name = "lm363x-regulator", \
|
||||
@ -141,7 +133,6 @@ static const struct ti_lmu_data chip##_data = \
|
||||
.max_register = max_reg, \
|
||||
} \
|
||||
|
||||
TI_LMU_DATA(lm3532, LM3532_MAX_REG);
|
||||
TI_LMU_DATA(lm3631, LM3631_MAX_REG);
|
||||
TI_LMU_DATA(lm3632, LM3632_MAX_REG);
|
||||
TI_LMU_DATA(lm3633, LM3633_MAX_REG);
|
||||
@ -211,7 +202,6 @@ static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
|
||||
}
|
||||
|
||||
static const struct of_device_id ti_lmu_of_match[] = {
|
||||
{ .compatible = "ti,lm3532", .data = &lm3532_data },
|
||||
{ .compatible = "ti,lm3631", .data = &lm3631_data },
|
||||
{ .compatible = "ti,lm3632", .data = &lm3632_data },
|
||||
{ .compatible = "ti,lm3633", .data = &lm3633_data },
|
||||
@ -222,7 +212,6 @@ static const struct of_device_id ti_lmu_of_match[] = {
|
||||
MODULE_DEVICE_TABLE(of, ti_lmu_of_match);
|
||||
|
||||
static const struct i2c_device_id ti_lmu_ids[] = {
|
||||
{ "lm3532", LM3532 },
|
||||
{ "lm3631", LM3631 },
|
||||
{ "lm3632", LM3632 },
|
||||
{ "lm3633", LM3633 },
|
||||
|
||||
@ -15,50 +15,6 @@
|
||||
|
||||
#include <linux/bitops.h>
|
||||
|
||||
/* LM3532 */
|
||||
#define LM3532_REG_OUTPUT_CFG 0x10
|
||||
#define LM3532_ILED1_CFG_MASK 0x03
|
||||
#define LM3532_ILED2_CFG_MASK 0x0C
|
||||
#define LM3532_ILED3_CFG_MASK 0x30
|
||||
#define LM3532_ILED1_CFG_SHIFT 0
|
||||
#define LM3532_ILED2_CFG_SHIFT 2
|
||||
#define LM3532_ILED3_CFG_SHIFT 4
|
||||
|
||||
#define LM3532_REG_RAMPUP 0x12
|
||||
#define LM3532_REG_RAMPDN LM3532_REG_RAMPUP
|
||||
#define LM3532_RAMPUP_MASK 0x07
|
||||
#define LM3532_RAMPUP_SHIFT 0
|
||||
#define LM3532_RAMPDN_MASK 0x38
|
||||
#define LM3532_RAMPDN_SHIFT 3
|
||||
|
||||
#define LM3532_REG_ENABLE 0x1D
|
||||
|
||||
#define LM3532_REG_PWM_A_CFG 0x13
|
||||
#define LM3532_PWM_A_MASK 0x05 /* zone 0 */
|
||||
#define LM3532_PWM_ZONE_0 BIT(2)
|
||||
|
||||
#define LM3532_REG_PWM_B_CFG 0x14
|
||||
#define LM3532_PWM_B_MASK 0x09 /* zone 1 */
|
||||
#define LM3532_PWM_ZONE_1 BIT(3)
|
||||
|
||||
#define LM3532_REG_PWM_C_CFG 0x15
|
||||
#define LM3532_PWM_C_MASK 0x11 /* zone 2 */
|
||||
#define LM3532_PWM_ZONE_2 BIT(4)
|
||||
|
||||
#define LM3532_REG_ZONE_CFG_A 0x16
|
||||
#define LM3532_REG_ZONE_CFG_B 0x18
|
||||
#define LM3532_REG_ZONE_CFG_C 0x1A
|
||||
#define LM3532_ZONE_MASK (BIT(2) | BIT(3) | BIT(4))
|
||||
#define LM3532_ZONE_0 0
|
||||
#define LM3532_ZONE_1 BIT(2)
|
||||
#define LM3532_ZONE_2 BIT(3)
|
||||
|
||||
#define LM3532_REG_BRT_A 0x70 /* zone 0 */
|
||||
#define LM3532_REG_BRT_B 0x76 /* zone 1 */
|
||||
#define LM3532_REG_BRT_C 0x7C /* zone 2 */
|
||||
|
||||
#define LM3532_MAX_REG 0x7E
|
||||
|
||||
/* LM3631 */
|
||||
#define LM3631_REG_DEVCTRL 0x00
|
||||
#define LM3631_LCD_EN_MASK BIT(1)
|
||||
|
||||
@ -22,7 +22,6 @@
|
||||
#define LMU_EVENT_MONITOR_DONE 0x01
|
||||
|
||||
enum ti_lmu_id {
|
||||
LM3532,
|
||||
LM3631,
|
||||
LM3632,
|
||||
LM3633,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user