forked from mirrors/linux
drm/panel: Add support for the Raspberry Pi 7" Touchscreen.
This driver communicates with the Atmel microcontroller for sequencing
the poweron of the TC358762 DSI-DPI bridge and controlling the
backlight PWM.
v2: Set the same default orientation as the closed source firmware
used, which is the best for viewing angle.
v3: Rewrite as an i2c client driver after bridge driver rejection.
v4: Finish probe without the DSI host, using the new delayed
registration, and attach to the host during mipi_dsi_driver probe.
v5: Rework to drop the "probe without DSI host" mode again, now that
vc4 will create the host early on.
v6: Drop unused brightness #define (noticed by Thierry)
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20170927193654.12609-4-eric@anholt.net
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Acked-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Eric Anholt
parent
407b0b1e0e
commit
2f733d6194
3 changed files with 523 additions and 0 deletions
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@ -82,6 +82,14 @@ config DRM_PANEL_PANASONIC_VVX10F034N00
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WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some
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WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some
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Xperia Z2 tablets
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Xperia Z2 tablets
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config DRM_PANEL_RASPBERRYPI_TOUCHSCREEN
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tristate "Raspberry Pi 7-inch touchscreen panel"
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depends on DRM_MIPI_DSI
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help
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Say Y here if you want to enable support for the Raspberry
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Pi 7" Touchscreen. To compile this driver as a module,
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choose M here.
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config DRM_PANEL_SAMSUNG_S6E3HA2
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config DRM_PANEL_SAMSUNG_S6E3HA2
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tristate "Samsung S6E3HA2 DSI video mode panel"
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tristate "Samsung S6E3HA2 DSI video mode panel"
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depends on OF
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depends on OF
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@ -5,6 +5,7 @@ obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
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obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
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obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
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obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
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obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
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obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
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obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
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obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
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obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
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514
drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
Normal file
514
drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
Normal file
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@ -0,0 +1,514 @@
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/*
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* Copyright © 2016-2017 Broadcom
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Portions of this file (derived from panel-simple.c) are:
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*
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* Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* Raspberry Pi 7" touchscreen panel driver.
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*
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* The 7" touchscreen consists of a DPI LCD panel, a Toshiba
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* TC358762XBG DSI-DPI bridge, and an I2C-connected Atmel ATTINY88-MUR
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* controlling power management, the LCD PWM, and initial register
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* setup of the Tohsiba.
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*
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* This driver controls the TC358762 and ATTINY88, presenting a DSI
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* device with a drm_panel.
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*/
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/fb.h>
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#include <linux/gpio.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/of_device.h>
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#include <linux/of_graph.h>
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#include <linux/pm.h>
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#include <drm/drm_panel.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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#define RPI_DSI_DRIVER_NAME "rpi-ts-dsi"
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/* I2C registers of the Atmel microcontroller. */
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enum REG_ADDR {
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REG_ID = 0x80,
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REG_PORTA, /* BIT(2) for horizontal flip, BIT(3) for vertical flip */
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REG_PORTB,
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REG_PORTC,
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REG_PORTD,
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REG_POWERON,
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REG_PWM,
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REG_DDRA,
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REG_DDRB,
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REG_DDRC,
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REG_DDRD,
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REG_TEST,
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REG_WR_ADDRL,
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REG_WR_ADDRH,
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REG_READH,
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REG_READL,
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REG_WRITEH,
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REG_WRITEL,
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REG_ID2,
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};
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/* DSI D-PHY Layer Registers */
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#define D0W_DPHYCONTTX 0x0004
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#define CLW_DPHYCONTRX 0x0020
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#define D0W_DPHYCONTRX 0x0024
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#define D1W_DPHYCONTRX 0x0028
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#define COM_DPHYCONTRX 0x0038
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#define CLW_CNTRL 0x0040
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#define D0W_CNTRL 0x0044
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#define D1W_CNTRL 0x0048
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#define DFTMODE_CNTRL 0x0054
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/* DSI PPI Layer Registers */
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#define PPI_STARTPPI 0x0104
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#define PPI_BUSYPPI 0x0108
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#define PPI_LINEINITCNT 0x0110
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#define PPI_LPTXTIMECNT 0x0114
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#define PPI_CLS_ATMR 0x0140
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#define PPI_D0S_ATMR 0x0144
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#define PPI_D1S_ATMR 0x0148
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#define PPI_D0S_CLRSIPOCOUNT 0x0164
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#define PPI_D1S_CLRSIPOCOUNT 0x0168
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#define CLS_PRE 0x0180
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#define D0S_PRE 0x0184
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#define D1S_PRE 0x0188
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#define CLS_PREP 0x01A0
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#define D0S_PREP 0x01A4
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#define D1S_PREP 0x01A8
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#define CLS_ZERO 0x01C0
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#define D0S_ZERO 0x01C4
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#define D1S_ZERO 0x01C8
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#define PPI_CLRFLG 0x01E0
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#define PPI_CLRSIPO 0x01E4
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#define HSTIMEOUT 0x01F0
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#define HSTIMEOUTENABLE 0x01F4
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/* DSI Protocol Layer Registers */
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#define DSI_STARTDSI 0x0204
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#define DSI_BUSYDSI 0x0208
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#define DSI_LANEENABLE 0x0210
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# define DSI_LANEENABLE_CLOCK BIT(0)
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# define DSI_LANEENABLE_D0 BIT(1)
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# define DSI_LANEENABLE_D1 BIT(2)
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#define DSI_LANESTATUS0 0x0214
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#define DSI_LANESTATUS1 0x0218
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#define DSI_INTSTATUS 0x0220
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#define DSI_INTMASK 0x0224
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#define DSI_INTCLR 0x0228
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#define DSI_LPTXTO 0x0230
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#define DSI_MODE 0x0260
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#define DSI_PAYLOAD0 0x0268
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#define DSI_PAYLOAD1 0x026C
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#define DSI_SHORTPKTDAT 0x0270
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#define DSI_SHORTPKTREQ 0x0274
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#define DSI_BTASTA 0x0278
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#define DSI_BTACLR 0x027C
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/* DSI General Registers */
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#define DSIERRCNT 0x0300
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#define DSISIGMOD 0x0304
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/* DSI Application Layer Registers */
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#define APLCTRL 0x0400
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#define APLSTAT 0x0404
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#define APLERR 0x0408
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#define PWRMOD 0x040C
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#define RDPKTLN 0x0410
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#define PXLFMT 0x0414
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#define MEMWRCMD 0x0418
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/* LCDC/DPI Host Registers */
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#define LCDCTRL 0x0420
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#define HSR 0x0424
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#define HDISPR 0x0428
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#define VSR 0x042C
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#define VDISPR 0x0430
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#define VFUEN 0x0434
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/* DBI-B Host Registers */
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#define DBIBCTRL 0x0440
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/* SPI Master Registers */
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#define SPICMR 0x0450
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#define SPITCR 0x0454
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/* System Controller Registers */
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#define SYSSTAT 0x0460
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#define SYSCTRL 0x0464
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#define SYSPLL1 0x0468
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#define SYSPLL2 0x046C
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#define SYSPLL3 0x0470
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#define SYSPMCTRL 0x047C
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/* GPIO Registers */
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#define GPIOC 0x0480
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#define GPIOO 0x0484
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#define GPIOI 0x0488
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/* I2C Registers */
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#define I2CCLKCTRL 0x0490
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/* Chip/Rev Registers */
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#define IDREG 0x04A0
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/* Debug Registers */
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#define WCMDQUEUE 0x0500
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#define RCMDQUEUE 0x0504
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struct rpi_touchscreen {
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struct drm_panel base;
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struct mipi_dsi_device *dsi;
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struct i2c_client *i2c;
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};
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static const struct drm_display_mode rpi_touchscreen_modes[] = {
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{
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/* Modeline comes from the Raspberry Pi firmware, with HFP=1
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* plugged in and clock re-computed from that.
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*/
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.clock = 25979400 / 1000,
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.hdisplay = 800,
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.hsync_start = 800 + 1,
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.hsync_end = 800 + 1 + 2,
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.htotal = 800 + 1 + 2 + 46,
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.vdisplay = 480,
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.vsync_start = 480 + 7,
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.vsync_end = 480 + 7 + 2,
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.vtotal = 480 + 7 + 2 + 21,
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.vrefresh = 60,
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},
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};
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static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel)
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{
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return container_of(panel, struct rpi_touchscreen, base);
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}
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static u8 rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg)
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{
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return i2c_smbus_read_byte_data(ts->i2c, reg);
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}
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static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts,
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u8 reg, u8 val)
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{
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int ret;
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ret = i2c_smbus_write_byte_data(ts->i2c, reg, val);
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if (ret)
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dev_err(&ts->dsi->dev, "I2C write failed: %d\n", ret);
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}
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static int rpi_touchscreen_write(struct rpi_touchscreen *ts, u16 reg, u32 val)
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{
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#if 0
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/* The firmware uses LP DSI transactions like this to bring up
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* the hardware, which should be faster than using I2C to then
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* pass to the Toshiba. However, I was unable to get it to
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* work.
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*/
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u8 msg[] = {
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reg,
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reg >> 8,
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val,
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val >> 8,
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val >> 16,
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val >> 24,
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};
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mipi_dsi_dcs_write_buffer(ts->dsi, msg, sizeof(msg));
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#else
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rpi_touchscreen_i2c_write(ts, REG_WR_ADDRH, reg >> 8);
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rpi_touchscreen_i2c_write(ts, REG_WR_ADDRL, reg);
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rpi_touchscreen_i2c_write(ts, REG_WRITEH, val >> 8);
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rpi_touchscreen_i2c_write(ts, REG_WRITEL, val);
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#endif
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return 0;
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}
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static int rpi_touchscreen_disable(struct drm_panel *panel)
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{
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struct rpi_touchscreen *ts = panel_to_ts(panel);
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rpi_touchscreen_i2c_write(ts, REG_PWM, 0);
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rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);
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udelay(1);
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return 0;
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}
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static int rpi_touchscreen_noop(struct drm_panel *panel)
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{
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return 0;
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}
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static int rpi_touchscreen_enable(struct drm_panel *panel)
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{
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struct rpi_touchscreen *ts = panel_to_ts(panel);
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int i;
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rpi_touchscreen_i2c_write(ts, REG_POWERON, 1);
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/* Wait for nPWRDWN to go low to indicate poweron is done. */
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for (i = 0; i < 100; i++) {
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if (rpi_touchscreen_i2c_read(ts, REG_PORTB) & 1)
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break;
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}
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rpi_touchscreen_write(ts, DSI_LANEENABLE,
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DSI_LANEENABLE_CLOCK |
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DSI_LANEENABLE_D0);
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rpi_touchscreen_write(ts, PPI_D0S_CLRSIPOCOUNT, 0x05);
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rpi_touchscreen_write(ts, PPI_D1S_CLRSIPOCOUNT, 0x05);
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rpi_touchscreen_write(ts, PPI_D0S_ATMR, 0x00);
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rpi_touchscreen_write(ts, PPI_D1S_ATMR, 0x00);
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|
rpi_touchscreen_write(ts, PPI_LPTXTIMECNT, 0x03);
|
||||||
|
|
||||||
|
rpi_touchscreen_write(ts, SPICMR, 0x00);
|
||||||
|
rpi_touchscreen_write(ts, LCDCTRL, 0x00100150);
|
||||||
|
rpi_touchscreen_write(ts, SYSCTRL, 0x040f);
|
||||||
|
msleep(100);
|
||||||
|
|
||||||
|
rpi_touchscreen_write(ts, PPI_STARTPPI, 0x01);
|
||||||
|
rpi_touchscreen_write(ts, DSI_STARTDSI, 0x01);
|
||||||
|
msleep(100);
|
||||||
|
|
||||||
|
/* Turn on the backlight. */
|
||||||
|
rpi_touchscreen_i2c_write(ts, REG_PWM, 255);
|
||||||
|
|
||||||
|
/* Default to the same orientation as the closed source
|
||||||
|
* firmware used for the panel. Runtime rotation
|
||||||
|
* configuration will be supported using VC4's plane
|
||||||
|
* orientation bits.
|
||||||
|
*/
|
||||||
|
rpi_touchscreen_i2c_write(ts, REG_PORTA, BIT(2));
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int rpi_touchscreen_get_modes(struct drm_panel *panel)
|
||||||
|
{
|
||||||
|
struct drm_connector *connector = panel->connector;
|
||||||
|
struct drm_device *drm = panel->drm;
|
||||||
|
unsigned int i, num = 0;
|
||||||
|
static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
|
||||||
|
|
||||||
|
for (i = 0; i < ARRAY_SIZE(rpi_touchscreen_modes); i++) {
|
||||||
|
const struct drm_display_mode *m = &rpi_touchscreen_modes[i];
|
||||||
|
struct drm_display_mode *mode;
|
||||||
|
|
||||||
|
mode = drm_mode_duplicate(drm, m);
|
||||||
|
if (!mode) {
|
||||||
|
dev_err(drm->dev, "failed to add mode %ux%u@%u\n",
|
||||||
|
m->hdisplay, m->vdisplay, m->vrefresh);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
mode->type |= DRM_MODE_TYPE_DRIVER;
|
||||||
|
|
||||||
|
if (i == 0)
|
||||||
|
mode->type |= DRM_MODE_TYPE_PREFERRED;
|
||||||
|
|
||||||
|
drm_mode_set_name(mode);
|
||||||
|
|
||||||
|
drm_mode_probed_add(connector, mode);
|
||||||
|
num++;
|
||||||
|
}
|
||||||
|
|
||||||
|
connector->display_info.bpc = 8;
|
||||||
|
connector->display_info.width_mm = 154;
|
||||||
|
connector->display_info.height_mm = 86;
|
||||||
|
drm_display_info_set_bus_formats(&connector->display_info,
|
||||||
|
&bus_format, 1);
|
||||||
|
|
||||||
|
return num;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct drm_panel_funcs rpi_touchscreen_funcs = {
|
||||||
|
.disable = rpi_touchscreen_disable,
|
||||||
|
.unprepare = rpi_touchscreen_noop,
|
||||||
|
.prepare = rpi_touchscreen_noop,
|
||||||
|
.enable = rpi_touchscreen_enable,
|
||||||
|
.get_modes = rpi_touchscreen_get_modes,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int rpi_touchscreen_probe(struct i2c_client *i2c,
|
||||||
|
const struct i2c_device_id *id)
|
||||||
|
{
|
||||||
|
struct device *dev = &i2c->dev;
|
||||||
|
struct rpi_touchscreen *ts;
|
||||||
|
struct device_node *endpoint, *dsi_host_node;
|
||||||
|
struct mipi_dsi_host *host;
|
||||||
|
int ret, ver;
|
||||||
|
struct mipi_dsi_device_info info = {
|
||||||
|
.type = RPI_DSI_DRIVER_NAME,
|
||||||
|
.channel = 0,
|
||||||
|
.node = NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
|
||||||
|
if (!ts)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
i2c_set_clientdata(i2c, ts);
|
||||||
|
|
||||||
|
ts->i2c = i2c;
|
||||||
|
|
||||||
|
ver = rpi_touchscreen_i2c_read(ts, REG_ID);
|
||||||
|
if (ver < 0) {
|
||||||
|
dev_err(dev, "Atmel I2C read failed: %d\n", ver);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (ver) {
|
||||||
|
case 0xde: /* ver 1 */
|
||||||
|
case 0xc3: /* ver 2 */
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
dev_err(dev, "Unknown Atmel firmware revision: 0x%02x\n", ver);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Turn off at boot, so we can cleanly sequence powering on. */
|
||||||
|
rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);
|
||||||
|
|
||||||
|
/* Look up the DSI host. It needs to probe before we do. */
|
||||||
|
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
|
||||||
|
dsi_host_node = of_graph_get_remote_port_parent(endpoint);
|
||||||
|
host = of_find_mipi_dsi_host_by_node(dsi_host_node);
|
||||||
|
of_node_put(dsi_host_node);
|
||||||
|
if (!host) {
|
||||||
|
of_node_put(endpoint);
|
||||||
|
return -EPROBE_DEFER;
|
||||||
|
}
|
||||||
|
|
||||||
|
info.node = of_graph_get_remote_port(endpoint);
|
||||||
|
of_node_put(endpoint);
|
||||||
|
|
||||||
|
ts->dsi = mipi_dsi_device_register_full(host, &info);
|
||||||
|
if (IS_ERR(ts->dsi)) {
|
||||||
|
dev_err(dev, "DSI device registration failed: %ld\n",
|
||||||
|
PTR_ERR(ts->dsi));
|
||||||
|
return PTR_ERR(ts->dsi);
|
||||||
|
}
|
||||||
|
|
||||||
|
ts->base.dev = dev;
|
||||||
|
ts->base.funcs = &rpi_touchscreen_funcs;
|
||||||
|
|
||||||
|
/* This appears last, as it's what will unblock the DSI host
|
||||||
|
* driver's component bind function.
|
||||||
|
*/
|
||||||
|
ret = drm_panel_add(&ts->base);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int rpi_touchscreen_remove(struct i2c_client *i2c)
|
||||||
|
{
|
||||||
|
struct rpi_touchscreen *ts = i2c_get_clientdata(i2c);
|
||||||
|
|
||||||
|
mipi_dsi_detach(ts->dsi);
|
||||||
|
|
||||||
|
drm_panel_remove(&ts->base);
|
||||||
|
|
||||||
|
mipi_dsi_device_unregister(ts->dsi);
|
||||||
|
kfree(ts->dsi);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |
|
||||||
|
MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
|
||||||
|
MIPI_DSI_MODE_LPM);
|
||||||
|
dsi->format = MIPI_DSI_FMT_RGB888;
|
||||||
|
dsi->lanes = 1;
|
||||||
|
|
||||||
|
ret = mipi_dsi_attach(dsi);
|
||||||
|
|
||||||
|
if (ret)
|
||||||
|
dev_err(&dsi->dev, "failed to attach dsi to host: %d\n", ret);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct mipi_dsi_driver rpi_touchscreen_dsi_driver = {
|
||||||
|
.driver.name = RPI_DSI_DRIVER_NAME,
|
||||||
|
.probe = rpi_touchscreen_dsi_probe,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct of_device_id rpi_touchscreen_of_ids[] = {
|
||||||
|
{ .compatible = "raspberrypi,7inch-touchscreen-panel" },
|
||||||
|
{ } /* sentinel */
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(of, rpi_touchscreen_of_ids);
|
||||||
|
|
||||||
|
static struct i2c_driver rpi_touchscreen_driver = {
|
||||||
|
.driver = {
|
||||||
|
.name = "rpi_touchscreen",
|
||||||
|
.of_match_table = rpi_touchscreen_of_ids,
|
||||||
|
},
|
||||||
|
.probe = rpi_touchscreen_probe,
|
||||||
|
.remove = rpi_touchscreen_remove,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int __init rpi_touchscreen_init(void)
|
||||||
|
{
|
||||||
|
mipi_dsi_driver_register(&rpi_touchscreen_dsi_driver);
|
||||||
|
return i2c_add_driver(&rpi_touchscreen_driver);
|
||||||
|
}
|
||||||
|
module_init(rpi_touchscreen_init);
|
||||||
|
|
||||||
|
static void __exit rpi_touchscreen_exit(void)
|
||||||
|
{
|
||||||
|
i2c_del_driver(&rpi_touchscreen_driver);
|
||||||
|
mipi_dsi_driver_unregister(&rpi_touchscreen_dsi_driver);
|
||||||
|
}
|
||||||
|
module_exit(rpi_touchscreen_exit);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
|
||||||
|
MODULE_DESCRIPTION("Raspberry Pi 7-inch touchscreen driver");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
Loading…
Reference in a new issue