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- New Drivers
- Add support for Kinetic KTZ8866 Backlight
- Remove Drivers
- Toshiba Sharp SL-6000 LCD and Backlight
- Fix-ups
- Provide some profiling optimisations with respect to pwm_get_state() and pwm_apply_state()
- Make use of the dev_err_probe() API
- Provide some Device Tree documentation additions / adaptions
- Drop fall-back legacy PWM probing support
- Convert over to new I2C probing API
- Fix incorrect documentation
- Make use of backlight_get_brightness() API
- Bug Fixes
- Fix disabling backlight on i.MX6 when inverted PWMs are used
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Merge tag 'backlight-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight
Pull backlight updates from Lee Jones:
"New Drivers:
- Add support for Kinetic KTZ8866 Backlight
Removed Drivers:
- Toshiba Sharp SL-6000 LCD and Backlight
Fix-ups:
- Provide some profiling optimisations with respect to
pwm_get_state() and pwm_apply_state()
- Make use of the dev_err_probe() API
- Provide some Device Tree documentation additions / adaptions
- Drop fall-back legacy PWM probing support
- Convert over to new I2C probing API
- Fix incorrect documentation
- Make use of backlight_get_brightness() API
Bug Fixes:
- Fix disabling backlight on i.MX6 when inverted PWMs are used"
* tag 'backlight-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
backlight: ktz8866: Convert to i2c's .probe_new()
backlight: ktz8866: Add support for Kinetic KTZ8866 backlight
dt-bindings: leds: backlight: Add Kinetic KTZ8866 backlight
backlight: pwm_bl: Don't rely on a disabled PWM emiting inactive state
backlight: pwm_bl: Configure pwm only once per backlight toggle
backlight: Remove pxa tosa support
backlight: aat2870: Use backlight helper
backlight: ipaq_micro: Use backlight helper
backlight: arcxcnn: Use backlight helper
backlight: sky81452: Fix sky81452_bl_platform_data kernel-doc
backlight: pwm_bl: Drop support for legacy PWM probing
dt-bindings: backlight: qcom-wled: Add PMI8950 compatible
backlight: ktd253: Switch to use dev_err_probe() helper
backlight: backlight: Fix doc for backlight_device_get_by_name
This commit is contained in:
Linus Torvalds
commit
025cf4dc5d
@ -0,0 +1,76 @@
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Kinetic Technologies KTZ8866 backlight
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maintainers:
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- Jianhua Lu <lujianhua000@gmail.com>
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description: |
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The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
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led backlight with dual lcd bias power.
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https://www.kinet-ic.com/ktz8866/
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allOf:
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- $ref: common.yaml#
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properties:
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compatible:
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const: kinetic,ktz8866
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vddpos-supply:
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description: positive boost supply regulator.
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vddneg-supply:
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description: negative boost supply regulator.
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enable-gpios:
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description: GPIO to use to enable/disable the backlight (HWEN pin).
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maxItems: 1
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current-num-sinks:
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description: number of the LED current sinks' channels.
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enum: [1, 2, 3, 4, 5, 6]
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kinetic,current-ramp-delay-ms:
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description: |
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LED current ramping delay time in milliseconds, note that the
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case 1 will be mapped to 1μs.
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enum: [1, 2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]
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kinetic,led-enable-ramp-delay-ms:
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description: |
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LED on/off ramping delay time in milliseconds, note that the case 0 will be
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mapped to 512μs because ktz8866 can't ramp faster than it.
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enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384]
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kinetic,enable-lcd-bias:
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description: Set if we want to output bias power supply for LCD.
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type: boolean
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required:
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- compatible
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- vddpos-supply
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- vddneg-supply
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- enable-gpios
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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backlight {
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compatible = "kinetic,ktz8866";
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vddpos-supply = <&bl_vddpos_5p5>;
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vddneg-supply = <&bl_vddneg_5p5>;
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enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>;
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current-num-sinks = <5>;
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kinetic,current-ramp-delay-ms = <128>;
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kinetic,led-enable-ramp-delay-ms = <1>;
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kinetic,enable-lcd-bias;
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};
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@ -19,6 +19,7 @@ properties:
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compatible:
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enum:
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- qcom,pm8941-wled
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- qcom,pmi8950-wled
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- qcom,pmi8994-wled
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- qcom,pmi8998-wled
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- qcom,pm660l-wled
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@ -11572,6 +11572,12 @@ M: John Hawley <warthog9@eaglescrag.net>
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S: Maintained
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F: tools/testing/ktest
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KTZ8866 BACKLIGHT DRIVER
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M: Jianhua Lu <lujianhua000@gmail.com>
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S: Maintained
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F: Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml
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F: drivers/video/backlight/ktz8866.c
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L3MDEV
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M: David Ahern <dsahern@kernel.org>
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L: netdev@vger.kernel.org
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@ -90,13 +90,6 @@ config LCD_PLATFORM
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This driver provides a platform-device registered LCD power
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control interface.
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config LCD_TOSA
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tristate "Sharp SL-6000 LCD Driver"
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depends on I2C && SPI && MACH_TOSA
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help
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If you have an Sharp SL-6000 Zaurus say Y to enable a driver
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for its LCD.
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config LCD_HP700
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tristate "HP Jornada 700 series LCD Driver"
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depends on SA1100_JORNADA720_SSP && !PREEMPTION
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@ -190,6 +183,14 @@ config BACKLIGHT_KTD253
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which is a 1-wire GPIO-controlled backlight found in some mobile
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phones.
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config BACKLIGHT_KTZ8866
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tristate "Backlight Driver for Kinetic KTZ8866"
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depends on I2C
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select REGMAP_I2C
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help
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Say Y to enable the backlight driver for the Kinetic KTZ8866
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found in Xiaomi Mi Pad 5 series.
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config BACKLIGHT_LM3533
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tristate "Backlight Driver for LM3533"
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depends on MFD_LM3533
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@ -288,13 +289,6 @@ config BACKLIGHT_APPLE
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If you have an Intel-based Apple say Y to enable a driver for its
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backlight.
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config BACKLIGHT_TOSA
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tristate "Sharp SL-6000 Backlight Driver"
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depends on I2C && MACH_TOSA && LCD_TOSA
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help
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If you have an Sharp SL-6000 Zaurus say Y to enable a driver
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for its backlight
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config BACKLIGHT_QCOM_WLED
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tristate "Qualcomm PMIC WLED Driver"
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select REGMAP
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@ -15,7 +15,6 @@ obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
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obj-$(CONFIG_LCD_OTM3225A) += otm3225a.o
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obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
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obj-$(CONFIG_LCD_TDO24M) += tdo24m.o
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obj-$(CONFIG_LCD_TOSA) += tosa_lcd.o
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obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
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obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
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@ -36,6 +35,7 @@ obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o
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obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o
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obj-$(CONFIG_BACKLIGHT_IPAQ_MICRO) += ipaq_micro_bl.o
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obj-$(CONFIG_BACKLIGHT_KTD253) += ktd253-backlight.o
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obj-$(CONFIG_BACKLIGHT_KTZ8866) += ktz8866.o
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obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o
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obj-$(CONFIG_BACKLIGHT_LM3630A) += lm3630a_bl.o
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obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o
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@ -53,7 +53,6 @@ obj-$(CONFIG_BACKLIGHT_QCOM_WLED) += qcom-wled.o
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obj-$(CONFIG_BACKLIGHT_RT4831) += rt4831-backlight.o
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obj-$(CONFIG_BACKLIGHT_SAHARA) += kb3886_bl.o
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obj-$(CONFIG_BACKLIGHT_SKY81452) += sky81452-backlight.o
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obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o
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obj-$(CONFIG_BACKLIGHT_TPS65217) += tps65217_bl.o
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obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o
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obj-$(CONFIG_BACKLIGHT_ARCXCNN) += arcxcnn_bl.o
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@ -59,7 +59,7 @@ static int aat2870_bl_update_status(struct backlight_device *bd)
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struct aat2870_bl_driver_data *aat2870_bl = bl_get_data(bd);
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struct aat2870_data *aat2870 =
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dev_get_drvdata(aat2870_bl->pdev->dev.parent);
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int brightness = bd->props.brightness;
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int brightness = backlight_get_brightness(bd);
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int ret;
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if ((brightness < 0) || (bd->props.max_brightness < brightness)) {
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@ -70,11 +70,6 @@ static int aat2870_bl_update_status(struct backlight_device *bd)
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dev_dbg(&bd->dev, "brightness=%d, power=%d, state=%d\n",
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bd->props.brightness, bd->props.power, bd->props.state);
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if ((bd->props.power != FB_BLANK_UNBLANK) ||
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(bd->props.state & BL_CORE_FBBLANK) ||
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(bd->props.state & BL_CORE_SUSPENDED))
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brightness = 0;
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ret = aat2870->write(aat2870, AAT2870_BLM,
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(u8)aat2870_brightness(aat2870_bl, brightness));
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if (ret < 0)
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@ -130,12 +130,9 @@ static int arcxcnn_set_brightness(struct arcxcnn *lp, u32 brightness)
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static int arcxcnn_bl_update_status(struct backlight_device *bl)
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{
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struct arcxcnn *lp = bl_get_data(bl);
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u32 brightness = bl->props.brightness;
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u32 brightness = backlight_get_brightness(bl);
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int ret;
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if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
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brightness = 0;
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ret = arcxcnn_set_brightness(lp, brightness);
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if (ret)
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return ret;
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@ -501,7 +501,7 @@ EXPORT_SYMBOL(backlight_device_get_by_type);
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*
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* This function looks up a backlight device by its name. It obtains a reference
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* on the backlight device and it is the caller's responsibility to drop the
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* reference by calling backlight_put().
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* reference by calling put_device().
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*
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* Returns:
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* A pointer to the backlight device if found, otherwise NULL.
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@ -16,17 +16,12 @@
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static int micro_bl_update_status(struct backlight_device *bd)
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{
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struct ipaq_micro *micro = dev_get_drvdata(&bd->dev);
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int intensity = bd->props.brightness;
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int intensity = backlight_get_brightness(bd);
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struct ipaq_micro_msg msg = {
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.id = MSG_BACKLIGHT,
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.tx_len = 3,
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};
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if (bd->props.power != FB_BLANK_UNBLANK)
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intensity = 0;
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if (bd->props.state & (BL_CORE_FBBLANK | BL_CORE_SUSPENDED))
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intensity = 0;
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/*
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* Message format:
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* Byte 0: backlight instance (usually 1)
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@ -173,12 +173,9 @@ static int ktd253_backlight_probe(struct platform_device *pdev)
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}
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ktd253->gpiod = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
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if (IS_ERR(ktd253->gpiod)) {
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ret = PTR_ERR(ktd253->gpiod);
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "gpio line missing or invalid.\n");
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return ret;
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}
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if (IS_ERR(ktd253->gpiod))
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return dev_err_probe(dev, PTR_ERR(ktd253->gpiod),
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"gpio line missing or invalid.\n");
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gpiod_set_consumer_name(ktd253->gpiod, dev_name(dev));
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/* Bring backlight to a known off state */
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msleep(KTD253_T_OFF_MS);
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208
drivers/video/backlight/ktz8866.c
Normal file
208
drivers/video/backlight/ktz8866.c
Normal file
@ -0,0 +1,208 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Backlight driver for the Kinetic KTZ8866
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*
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* Copyright (C) 2022, 2023 Jianhua Lu <lujianhua000@gmail.com>
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*/
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|
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#include <linux/backlight.h>
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#include <linux/err.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
|
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#include <linux/of.h>
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#include <linux/regmap.h>
|
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|
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#define DEFAULT_BRIGHTNESS 1500
|
||||
#define MAX_BRIGHTNESS 2047
|
||||
#define REG_MAX 0x15
|
||||
|
||||
/* reg */
|
||||
#define DEVICE_ID 0x01
|
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#define BL_CFG1 0x02
|
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#define BL_CFG2 0x03
|
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#define BL_BRT_LSB 0x04
|
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#define BL_BRT_MSB 0x05
|
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#define BL_EN 0x08
|
||||
#define LCD_BIAS_CFG1 0x09
|
||||
#define LCD_BIAS_CFG2 0x0A
|
||||
#define LCD_BIAS_CFG3 0x0B
|
||||
#define LCD_BOOST_CFG 0x0C
|
||||
#define OUTP_CFG 0x0D
|
||||
#define OUTN_CFG 0x0E
|
||||
#define FLAG 0x0F
|
||||
#define BL_OPTION1 0x10
|
||||
#define BL_OPTION2 0x11
|
||||
#define PWM2DIG_LSBs 0x12
|
||||
#define PWM2DIG_MSBs 0x13
|
||||
#define BL_DIMMING 0x14
|
||||
#define PWM_RAMP_TIME 0x15
|
||||
|
||||
/* definition */
|
||||
#define BL_EN_BIT BIT(6)
|
||||
#define LCD_BIAS_EN 0x9F
|
||||
#define PWM_HYST 0x5
|
||||
|
||||
struct ktz8866 {
|
||||
struct i2c_client *client;
|
||||
struct regmap *regmap;
|
||||
bool led_on;
|
||||
struct gpio_desc *enable_gpio;
|
||||
};
|
||||
|
||||
static const struct regmap_config ktz8866_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = REG_MAX,
|
||||
};
|
||||
|
||||
static int ktz8866_write(struct ktz8866 *ktz, unsigned int reg,
|
||||
unsigned int val)
|
||||
{
|
||||
return regmap_write(ktz->regmap, reg, val);
|
||||
}
|
||||
|
||||
static int ktz8866_update_bits(struct ktz8866 *ktz, unsigned int reg,
|
||||
unsigned int mask, unsigned int val)
|
||||
{
|
||||
return regmap_update_bits(ktz->regmap, reg, mask, val);
|
||||
}
|
||||
|
||||
static int ktz8866_backlight_update_status(struct backlight_device *backlight_dev)
|
||||
{
|
||||
struct ktz8866 *ktz = bl_get_data(backlight_dev);
|
||||
unsigned int brightness = backlight_get_brightness(backlight_dev);
|
||||
|
||||
if (!ktz->led_on && brightness > 0) {
|
||||
ktz8866_update_bits(ktz, BL_EN, BL_EN_BIT, BL_EN_BIT);
|
||||
ktz->led_on = true;
|
||||
} else if (brightness == 0) {
|
||||
ktz8866_update_bits(ktz, BL_EN, BL_EN_BIT, 0);
|
||||
ktz->led_on = false;
|
||||
}
|
||||
|
||||
/* Set brightness */
|
||||
ktz8866_write(ktz, BL_BRT_LSB, brightness & 0x7);
|
||||
ktz8866_write(ktz, BL_BRT_MSB, (brightness >> 3) & 0xFF);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct backlight_ops ktz8866_backlight_ops = {
|
||||
.options = BL_CORE_SUSPENDRESUME,
|
||||
.update_status = ktz8866_backlight_update_status,
|
||||
};
|
||||
|
||||
static void ktz8866_init(struct ktz8866 *ktz)
|
||||
{
|
||||
unsigned int val = 0;
|
||||
|
||||
if (of_property_read_u32(ktz->client->dev.of_node, "current-num-sinks", &val))
|
||||
ktz8866_write(ktz, BL_EN, BIT(val) - 1);
|
||||
else
|
||||
/* Enable all 6 current sinks if the number of current sinks isn't specified. */
|
||||
ktz8866_write(ktz, BL_EN, BIT(6) - 1);
|
||||
|
||||
if (of_property_read_u32(ktz->client->dev.of_node, "kinetic,current-ramp-delay-ms", &val)) {
|
||||
if (val <= 128)
|
||||
ktz8866_write(ktz, BL_CFG2, BIT(7) | (ilog2(val) << 3) | PWM_HYST);
|
||||
else
|
||||
ktz8866_write(ktz, BL_CFG2, BIT(7) | ((5 + val / 64) << 3) | PWM_HYST);
|
||||
}
|
||||
|
||||
if (of_property_read_u32(ktz->client->dev.of_node, "kinetic,led-enable-ramp-delay-ms", &val)) {
|
||||
if (val == 0)
|
||||
ktz8866_write(ktz, BL_DIMMING, 0);
|
||||
else {
|
||||
unsigned int ramp_off_time = ilog2(val) + 1;
|
||||
unsigned int ramp_on_time = ramp_off_time << 4;
|
||||
ktz8866_write(ktz, BL_DIMMING, ramp_on_time | ramp_off_time);
|
||||
}
|
||||
}
|
||||
|
||||
if (of_property_read_bool(ktz->client->dev.of_node, "kinetic,enable-lcd-bias"))
|
||||
ktz8866_write(ktz, LCD_BIAS_CFG1, LCD_BIAS_EN);
|
||||
}
|
||||
|
||||
static int ktz8866_probe(struct i2c_client *client)
|
||||
{
|
||||
struct backlight_device *backlight_dev;
|
||||
struct backlight_properties props;
|
||||
struct ktz8866 *ktz;
|
||||
int ret = 0;
|
||||
|
||||
ktz = devm_kzalloc(&client->dev, sizeof(*ktz), GFP_KERNEL);
|
||||
if (!ktz)
|
||||
return -ENOMEM;
|
||||
|
||||
ktz->client = client;
|
||||
ktz->regmap = devm_regmap_init_i2c(client, &ktz8866_regmap_config);
|
||||
if (IS_ERR(ktz->regmap))
|
||||
return dev_err_probe(&client->dev, PTR_ERR(ktz->regmap), "failed to init regmap\n");
|
||||
|
||||
ret = devm_regulator_get_enable(&client->dev, "vddpos");
|
||||
if (ret)
|
||||
return dev_err_probe(&client->dev, ret, "get regulator vddpos failed\n");
|
||||
ret = devm_regulator_get_enable(&client->dev, "vddneg");
|
||||
if (ret)
|
||||
return dev_err_probe(&client->dev, ret, "get regulator vddneg failed\n");
|
||||
|
||||
ktz->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(ktz->enable_gpio))
|
||||
return PTR_ERR(ktz->enable_gpio);
|
||||
|
||||
memset(&props, 0, sizeof(props));
|
||||
props.type = BACKLIGHT_RAW;
|
||||
props.max_brightness = MAX_BRIGHTNESS;
|
||||
props.brightness = DEFAULT_BRIGHTNESS;
|
||||
props.scale = BACKLIGHT_SCALE_LINEAR;
|
||||
|
||||
backlight_dev = devm_backlight_device_register(&client->dev, "ktz8866-backlight",
|
||||
&client->dev, ktz, &ktz8866_backlight_ops, &props);
|
||||
if (IS_ERR(backlight_dev))
|
||||
return dev_err_probe(&client->dev, PTR_ERR(backlight_dev),
|
||||
"failed to register backlight device\n");
|
||||
|
||||
ktz8866_init(ktz);
|
||||
|
||||
i2c_set_clientdata(client, backlight_dev);
|
||||
backlight_update_status(backlight_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ktz8866_remove(struct i2c_client *client)
|
||||
{
|
||||
struct backlight_device *backlight_dev = i2c_get_clientdata(client);
|
||||
backlight_dev->props.brightness = 0;
|
||||
backlight_update_status(backlight_dev);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id ktz8866_ids[] = {
|
||||
{ "ktz8866", 0 },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, ktz8866_ids);
|
||||
|
||||
static const struct of_device_id ktz8866_match_table[] = {
|
||||
{
|
||||
.compatible = "kinetic,ktz8866",
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct i2c_driver ktz8866_driver = {
|
||||
.driver = {
|
||||
.name = "ktz8866",
|
||||
.of_match_table = ktz8866_match_table,
|
||||
},
|
||||
.probe_new = ktz8866_probe,
|
||||
.remove = ktz8866_remove,
|
||||
.id_table = ktz8866_ids,
|
||||
};
|
||||
|
||||
module_i2c_driver(ktz8866_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Kinetic KTZ8866 Backlight Driver");
|
||||
MODULE_AUTHOR("Jianhua Lu <lujianhua000@gmail.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
@ -28,7 +28,6 @@ struct pwm_bl_data {
|
||||
struct regulator *power_supply;
|
||||
struct gpio_desc *enable_gpio;
|
||||
unsigned int scale;
|
||||
bool legacy;
|
||||
unsigned int post_pwm_on_delay;
|
||||
unsigned int pwm_off_delay;
|
||||
int (*notify)(struct device *,
|
||||
@ -41,19 +40,16 @@ struct pwm_bl_data {
|
||||
|
||||
static void pwm_backlight_power_on(struct pwm_bl_data *pb)
|
||||
{
|
||||
struct pwm_state state;
|
||||
int err;
|
||||
|
||||
pwm_get_state(pb->pwm, &state);
|
||||
if (pb->enabled)
|
||||
return;
|
||||
|
||||
err = regulator_enable(pb->power_supply);
|
||||
if (err < 0)
|
||||
dev_err(pb->dev, "failed to enable power supply\n");
|
||||
|
||||
state.enabled = true;
|
||||
pwm_apply_state(pb->pwm, &state);
|
||||
if (pb->power_supply) {
|
||||
err = regulator_enable(pb->power_supply);
|
||||
if (err < 0)
|
||||
dev_err(pb->dev, "failed to enable power supply\n");
|
||||
}
|
||||
|
||||
if (pb->post_pwm_on_delay)
|
||||
msleep(pb->post_pwm_on_delay);
|
||||
@ -66,9 +62,6 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb)
|
||||
|
||||
static void pwm_backlight_power_off(struct pwm_bl_data *pb)
|
||||
{
|
||||
struct pwm_state state;
|
||||
|
||||
pwm_get_state(pb->pwm, &state);
|
||||
if (!pb->enabled)
|
||||
return;
|
||||
|
||||
@ -78,28 +71,22 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
|
||||
if (pb->pwm_off_delay)
|
||||
msleep(pb->pwm_off_delay);
|
||||
|
||||
state.enabled = false;
|
||||
state.duty_cycle = 0;
|
||||
pwm_apply_state(pb->pwm, &state);
|
||||
|
||||
regulator_disable(pb->power_supply);
|
||||
if (pb->power_supply)
|
||||
regulator_disable(pb->power_supply);
|
||||
pb->enabled = false;
|
||||
}
|
||||
|
||||
static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness)
|
||||
static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness, struct pwm_state *state)
|
||||
{
|
||||
unsigned int lth = pb->lth_brightness;
|
||||
struct pwm_state state;
|
||||
u64 duty_cycle;
|
||||
|
||||
pwm_get_state(pb->pwm, &state);
|
||||
|
||||
if (pb->levels)
|
||||
duty_cycle = pb->levels[brightness];
|
||||
else
|
||||
duty_cycle = brightness;
|
||||
|
||||
duty_cycle *= state.period - lth;
|
||||
duty_cycle *= state->period - lth;
|
||||
do_div(duty_cycle, pb->scale);
|
||||
|
||||
return duty_cycle + lth;
|
||||
@ -116,11 +103,26 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
|
||||
|
||||
if (brightness > 0) {
|
||||
pwm_get_state(pb->pwm, &state);
|
||||
state.duty_cycle = compute_duty_cycle(pb, brightness);
|
||||
state.duty_cycle = compute_duty_cycle(pb, brightness, &state);
|
||||
state.enabled = true;
|
||||
pwm_apply_state(pb->pwm, &state);
|
||||
|
||||
pwm_backlight_power_on(pb);
|
||||
} else {
|
||||
pwm_backlight_power_off(pb);
|
||||
|
||||
pwm_get_state(pb->pwm, &state);
|
||||
state.duty_cycle = 0;
|
||||
/*
|
||||
* We cannot assume a disabled PWM to drive its output to the
|
||||
* inactive state. If we have an enable GPIO and/or a regulator
|
||||
* we assume that this isn't relevant and we can disable the PWM
|
||||
* to save power. If however there is neither an enable GPIO nor
|
||||
* a regulator keep the PWM on be sure to get a constant
|
||||
* inactive output.
|
||||
*/
|
||||
state.enabled = !pb->power_supply && !pb->enable_gpio;
|
||||
pwm_apply_state(pb->pwm, &state);
|
||||
}
|
||||
|
||||
if (pb->notify_after)
|
||||
@ -417,7 +419,7 @@ static int pwm_backlight_initial_power_state(const struct pwm_bl_data *pb)
|
||||
if (pb->enable_gpio && gpiod_get_value_cansleep(pb->enable_gpio) == 0)
|
||||
active = false;
|
||||
|
||||
if (!regulator_is_enabled(pb->power_supply))
|
||||
if (pb->power_supply && !regulator_is_enabled(pb->power_supply))
|
||||
active = false;
|
||||
|
||||
if (!pwm_is_enabled(pb->pwm))
|
||||
@ -455,7 +457,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
|
||||
struct platform_pwm_backlight_data defdata;
|
||||
struct backlight_properties props;
|
||||
struct backlight_device *bl;
|
||||
struct device_node *node = pdev->dev.of_node;
|
||||
struct pwm_bl_data *pb;
|
||||
struct pwm_state state;
|
||||
unsigned int i;
|
||||
@ -499,19 +500,16 @@ static int pwm_backlight_probe(struct platform_device *pdev)
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
pb->power_supply = devm_regulator_get(&pdev->dev, "power");
|
||||
pb->power_supply = devm_regulator_get_optional(&pdev->dev, "power");
|
||||
if (IS_ERR(pb->power_supply)) {
|
||||
ret = PTR_ERR(pb->power_supply);
|
||||
goto err_alloc;
|
||||
if (ret == -ENODEV)
|
||||
pb->power_supply = NULL;
|
||||
else
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
pb->pwm = devm_pwm_get(&pdev->dev, NULL);
|
||||
if (IS_ERR(pb->pwm) && PTR_ERR(pb->pwm) != -EPROBE_DEFER && !node) {
|
||||
dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n");
|
||||
pb->legacy = true;
|
||||
pb->pwm = pwm_request(data->pwm_id, "pwm-backlight");
|
||||
}
|
||||
|
||||
if (IS_ERR(pb->pwm)) {
|
||||
ret = PTR_ERR(pb->pwm);
|
||||
if (ret != -EPROBE_DEFER)
|
||||
@ -604,8 +602,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
|
||||
if (IS_ERR(bl)) {
|
||||
dev_err(&pdev->dev, "failed to register backlight\n");
|
||||
ret = PTR_ERR(bl);
|
||||
if (pb->legacy)
|
||||
pwm_free(pb->pwm);
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
@ -639,8 +635,6 @@ static int pwm_backlight_remove(struct platform_device *pdev)
|
||||
|
||||
if (pb->exit)
|
||||
pb->exit(&pdev->dev);
|
||||
if (pb->legacy)
|
||||
pwm_free(pb->pwm);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -41,7 +41,7 @@
|
||||
#define SKY81452_MAX_BRIGHTNESS (SKY81452_CS + 1)
|
||||
|
||||
/**
|
||||
* struct sky81452_platform_data
|
||||
* struct sky81452_bl_platform_data - backlight platform data
|
||||
* @name: backlight driver name.
|
||||
* If it is not defined, default name is lcd-backlight.
|
||||
* @gpiod_enable:GPIO descriptor which control EN pin
|
||||
|
||||
@ -1,172 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* LCD / Backlight control code for Sharp SL-6000x (tosa)
|
||||
*
|
||||
* Copyright (c) 2005 Dirk Opfer
|
||||
* Copyright (c) 2007,2008 Dmitry Baryshkov
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/fb.h>
|
||||
#include <linux/backlight.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include <asm/mach/sharpsl_param.h>
|
||||
|
||||
#include "tosa_bl.h"
|
||||
|
||||
#define COMADJ_DEFAULT 97
|
||||
|
||||
#define DAC_CH1 0
|
||||
#define DAC_CH2 1
|
||||
|
||||
struct tosa_bl_data {
|
||||
struct i2c_client *i2c;
|
||||
struct backlight_device *bl;
|
||||
struct gpio_desc *gpio;
|
||||
|
||||
int comadj;
|
||||
};
|
||||
|
||||
static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness)
|
||||
{
|
||||
struct spi_device *spi = dev_get_platdata(&data->i2c->dev);
|
||||
|
||||
i2c_smbus_write_byte_data(data->i2c, DAC_CH1, data->comadj);
|
||||
|
||||
/* SetBacklightDuty */
|
||||
i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff));
|
||||
|
||||
/* SetBacklightVR */
|
||||
gpiod_set_value(data->gpio, brightness & 0x100);
|
||||
|
||||
tosa_bl_enable(spi, brightness);
|
||||
}
|
||||
|
||||
static int tosa_bl_update_status(struct backlight_device *dev)
|
||||
{
|
||||
struct backlight_properties *props = &dev->props;
|
||||
struct tosa_bl_data *data = bl_get_data(dev);
|
||||
int power = max(props->power, props->fb_blank);
|
||||
int brightness = props->brightness;
|
||||
|
||||
if (power)
|
||||
brightness = 0;
|
||||
|
||||
tosa_bl_set_backlight(data, brightness);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tosa_bl_get_brightness(struct backlight_device *dev)
|
||||
{
|
||||
struct backlight_properties *props = &dev->props;
|
||||
|
||||
return props->brightness;
|
||||
}
|
||||
|
||||
static const struct backlight_ops bl_ops = {
|
||||
.get_brightness = tosa_bl_get_brightness,
|
||||
.update_status = tosa_bl_update_status,
|
||||
};
|
||||
|
||||
static int tosa_bl_probe(struct i2c_client *client)
|
||||
{
|
||||
struct backlight_properties props;
|
||||
struct tosa_bl_data *data;
|
||||
int ret = 0;
|
||||
|
||||
data = devm_kzalloc(&client->dev, sizeof(struct tosa_bl_data),
|
||||
GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj;
|
||||
data->gpio = devm_gpiod_get(&client->dev, "backlight", GPIOD_OUT_LOW);
|
||||
ret = PTR_ERR_OR_ZERO(data->gpio);
|
||||
if (ret) {
|
||||
dev_dbg(&data->bl->dev, "Unable to request gpio!\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
i2c_set_clientdata(client, data);
|
||||
data->i2c = client;
|
||||
|
||||
memset(&props, 0, sizeof(struct backlight_properties));
|
||||
props.type = BACKLIGHT_RAW;
|
||||
props.max_brightness = 512 - 1;
|
||||
data->bl = devm_backlight_device_register(&client->dev, "tosa-bl",
|
||||
&client->dev, data, &bl_ops,
|
||||
&props);
|
||||
if (IS_ERR(data->bl)) {
|
||||
ret = PTR_ERR(data->bl);
|
||||
goto err_reg;
|
||||
}
|
||||
|
||||
data->bl->props.brightness = 69;
|
||||
data->bl->props.power = FB_BLANK_UNBLANK;
|
||||
|
||||
backlight_update_status(data->bl);
|
||||
|
||||
return 0;
|
||||
|
||||
err_reg:
|
||||
data->bl = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void tosa_bl_remove(struct i2c_client *client)
|
||||
{
|
||||
struct tosa_bl_data *data = i2c_get_clientdata(client);
|
||||
|
||||
data->bl = NULL;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int tosa_bl_suspend(struct device *dev)
|
||||
{
|
||||
struct tosa_bl_data *data = dev_get_drvdata(dev);
|
||||
|
||||
tosa_bl_set_backlight(data, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tosa_bl_resume(struct device *dev)
|
||||
{
|
||||
struct tosa_bl_data *data = dev_get_drvdata(dev);
|
||||
|
||||
backlight_update_status(data->bl);
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(tosa_bl_pm_ops, tosa_bl_suspend, tosa_bl_resume);
|
||||
|
||||
static const struct i2c_device_id tosa_bl_id[] = {
|
||||
{ "tosa-bl", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, tosa_bl_id);
|
||||
|
||||
static struct i2c_driver tosa_bl_driver = {
|
||||
.driver = {
|
||||
.name = "tosa-bl",
|
||||
.pm = &tosa_bl_pm_ops,
|
||||
},
|
||||
.probe_new = tosa_bl_probe,
|
||||
.remove = tosa_bl_remove,
|
||||
.id_table = tosa_bl_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(tosa_bl_driver);
|
||||
|
||||
MODULE_AUTHOR("Dmitry Baryshkov");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
|
||||
|
||||
@ -1,8 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
#ifndef _TOSA_BL_H
|
||||
#define _TOSA_BL_H
|
||||
|
||||
struct spi_device;
|
||||
extern int tosa_bl_enable(struct spi_device *spi, int enable);
|
||||
|
||||
#endif
|
||||
@ -1,284 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* LCD / Backlight control code for Sharp SL-6000x (tosa)
|
||||
*
|
||||
* Copyright (c) 2005 Dirk Opfer
|
||||
* Copyright (c) 2007,2008 Dmitry Baryshkov
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/lcd.h>
|
||||
#include <linux/fb.h>
|
||||
|
||||
#include <asm/mach/sharpsl_param.h>
|
||||
|
||||
#include "tosa_bl.h"
|
||||
|
||||
#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
|
||||
|
||||
#define TG_REG0_VQV 0x0001
|
||||
#define TG_REG0_COLOR 0x0002
|
||||
#define TG_REG0_UD 0x0004
|
||||
#define TG_REG0_LR 0x0008
|
||||
|
||||
/*
|
||||
* Timing Generator
|
||||
*/
|
||||
#define TG_PNLCTL 0x00
|
||||
#define TG_TPOSCTL 0x01
|
||||
#define TG_DUTYCTL 0x02
|
||||
#define TG_GPOSR 0x03
|
||||
#define TG_GPODR1 0x04
|
||||
#define TG_GPODR2 0x05
|
||||
#define TG_PINICTL 0x06
|
||||
#define TG_HPOSCTL 0x07
|
||||
|
||||
|
||||
#define DAC_BASE 0x4e
|
||||
|
||||
struct tosa_lcd_data {
|
||||
struct spi_device *spi;
|
||||
struct lcd_device *lcd;
|
||||
struct i2c_client *i2c;
|
||||
struct gpio_desc *gpiod_tg;
|
||||
|
||||
int lcd_power;
|
||||
bool is_vga;
|
||||
};
|
||||
|
||||
static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data)
|
||||
{
|
||||
u8 buf[1];
|
||||
struct spi_message msg;
|
||||
struct spi_transfer xfer = {
|
||||
.len = 1,
|
||||
.cs_change = 0,
|
||||
.tx_buf = buf,
|
||||
};
|
||||
|
||||
buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer, &msg);
|
||||
|
||||
return spi_sync(spi, &msg);
|
||||
}
|
||||
|
||||
int tosa_bl_enable(struct spi_device *spi, int enable)
|
||||
{
|
||||
/* bl_enable GP04=1 otherwise GP04=0*/
|
||||
return tosa_tg_send(spi, TG_GPODR2, enable ? 0x01 : 0x00);
|
||||
}
|
||||
EXPORT_SYMBOL(tosa_bl_enable);
|
||||
|
||||
static void tosa_lcd_tg_init(struct tosa_lcd_data *data)
|
||||
{
|
||||
/* TG on */
|
||||
gpiod_set_value(data->gpiod_tg, 0);
|
||||
|
||||
mdelay(60);
|
||||
|
||||
/* delayed 0clk TCTL signal for VGA */
|
||||
tosa_tg_send(data->spi, TG_TPOSCTL, 0x00);
|
||||
/* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */
|
||||
tosa_tg_send(data->spi, TG_GPOSR, 0x02);
|
||||
}
|
||||
|
||||
static void tosa_lcd_tg_on(struct tosa_lcd_data *data)
|
||||
{
|
||||
struct spi_device *spi = data->spi;
|
||||
int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
|
||||
|
||||
if (data->is_vga)
|
||||
value |= TG_REG0_VQV;
|
||||
|
||||
tosa_tg_send(spi, TG_PNLCTL, value);
|
||||
|
||||
/* TG LCD pannel power up */
|
||||
tosa_tg_send(spi, TG_PINICTL, 0x4);
|
||||
mdelay(50);
|
||||
|
||||
/* TG LCD GVSS */
|
||||
tosa_tg_send(spi, TG_PINICTL, 0x0);
|
||||
|
||||
if (IS_ERR_OR_NULL(data->i2c)) {
|
||||
/*
|
||||
* after the pannel is powered up the first time,
|
||||
* we can access the i2c bus so probe for the DAC
|
||||
*/
|
||||
struct i2c_adapter *adap = i2c_get_adapter(0);
|
||||
struct i2c_board_info info = {
|
||||
.dev_name = "tosa-bl",
|
||||
.type = "tosa-bl",
|
||||
.addr = DAC_BASE,
|
||||
.platform_data = data->spi,
|
||||
};
|
||||
data->i2c = i2c_new_client_device(adap, &info);
|
||||
}
|
||||
}
|
||||
|
||||
static void tosa_lcd_tg_off(struct tosa_lcd_data *data)
|
||||
{
|
||||
struct spi_device *spi = data->spi;
|
||||
|
||||
/* TG LCD VHSA off */
|
||||
tosa_tg_send(spi, TG_PINICTL, 0x4);
|
||||
mdelay(50);
|
||||
|
||||
/* TG LCD signal off */
|
||||
tosa_tg_send(spi, TG_PINICTL, 0x6);
|
||||
mdelay(50);
|
||||
|
||||
/* TG Off */
|
||||
gpiod_set_value(data->gpiod_tg, 1);
|
||||
mdelay(100);
|
||||
}
|
||||
|
||||
int tosa_lcd_set_power(struct lcd_device *lcd, int power)
|
||||
{
|
||||
struct tosa_lcd_data *data = lcd_get_data(lcd);
|
||||
|
||||
if (POWER_IS_ON(power) && !POWER_IS_ON(data->lcd_power))
|
||||
tosa_lcd_tg_on(data);
|
||||
|
||||
if (!POWER_IS_ON(power) && POWER_IS_ON(data->lcd_power))
|
||||
tosa_lcd_tg_off(data);
|
||||
|
||||
data->lcd_power = power;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tosa_lcd_get_power(struct lcd_device *lcd)
|
||||
{
|
||||
struct tosa_lcd_data *data = lcd_get_data(lcd);
|
||||
|
||||
return data->lcd_power;
|
||||
}
|
||||
|
||||
static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
|
||||
{
|
||||
struct tosa_lcd_data *data = lcd_get_data(lcd);
|
||||
|
||||
if (mode->xres == 320 || mode->yres == 320)
|
||||
data->is_vga = false;
|
||||
else
|
||||
data->is_vga = true;
|
||||
|
||||
if (POWER_IS_ON(data->lcd_power))
|
||||
tosa_lcd_tg_on(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct lcd_ops tosa_lcd_ops = {
|
||||
.set_power = tosa_lcd_set_power,
|
||||
.get_power = tosa_lcd_get_power,
|
||||
.set_mode = tosa_lcd_set_mode,
|
||||
};
|
||||
|
||||
static int tosa_lcd_probe(struct spi_device *spi)
|
||||
{
|
||||
int ret;
|
||||
struct tosa_lcd_data *data;
|
||||
|
||||
data = devm_kzalloc(&spi->dev, sizeof(struct tosa_lcd_data),
|
||||
GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->is_vga = true; /* default to VGA mode */
|
||||
|
||||
/*
|
||||
* bits_per_word cannot be configured in platform data
|
||||
*/
|
||||
spi->bits_per_word = 8;
|
||||
|
||||
ret = spi_setup(spi);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
data->spi = spi;
|
||||
spi_set_drvdata(spi, data);
|
||||
|
||||
data->gpiod_tg = devm_gpiod_get(&spi->dev, "tg #pwr", GPIOD_OUT_LOW);
|
||||
if (IS_ERR(data->gpiod_tg))
|
||||
return PTR_ERR(data->gpiod_tg);
|
||||
|
||||
mdelay(60);
|
||||
|
||||
tosa_lcd_tg_init(data);
|
||||
|
||||
tosa_lcd_tg_on(data);
|
||||
|
||||
data->lcd = devm_lcd_device_register(&spi->dev, "tosa-lcd", &spi->dev,
|
||||
data, &tosa_lcd_ops);
|
||||
|
||||
if (IS_ERR(data->lcd)) {
|
||||
ret = PTR_ERR(data->lcd);
|
||||
data->lcd = NULL;
|
||||
goto err_register;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_register:
|
||||
tosa_lcd_tg_off(data);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void tosa_lcd_remove(struct spi_device *spi)
|
||||
{
|
||||
struct tosa_lcd_data *data = spi_get_drvdata(spi);
|
||||
|
||||
i2c_unregister_device(data->i2c);
|
||||
|
||||
tosa_lcd_tg_off(data);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int tosa_lcd_suspend(struct device *dev)
|
||||
{
|
||||
struct tosa_lcd_data *data = dev_get_drvdata(dev);
|
||||
|
||||
tosa_lcd_tg_off(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tosa_lcd_resume(struct device *dev)
|
||||
{
|
||||
struct tosa_lcd_data *data = dev_get_drvdata(dev);
|
||||
|
||||
tosa_lcd_tg_init(data);
|
||||
if (POWER_IS_ON(data->lcd_power))
|
||||
tosa_lcd_tg_on(data);
|
||||
else
|
||||
tosa_lcd_tg_off(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(tosa_lcd_pm_ops, tosa_lcd_suspend, tosa_lcd_resume);
|
||||
|
||||
static struct spi_driver tosa_lcd_driver = {
|
||||
.driver = {
|
||||
.name = "tosa-lcd",
|
||||
.pm = &tosa_lcd_pm_ops,
|
||||
},
|
||||
.probe = tosa_lcd_probe,
|
||||
.remove = tosa_lcd_remove,
|
||||
};
|
||||
|
||||
module_spi_driver(tosa_lcd_driver);
|
||||
|
||||
MODULE_AUTHOR("Dmitry Baryshkov");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
|
||||
MODULE_ALIAS("spi:tosa-lcd");
|
||||
@ -8,7 +8,6 @@
|
||||
#include <linux/backlight.h>
|
||||
|
||||
struct platform_pwm_backlight_data {
|
||||
int pwm_id;
|
||||
unsigned int max_brightness;
|
||||
unsigned int dft_brightness;
|
||||
unsigned int lth_brightness;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user