[PATCH v3 4/4] video: add Ilitek ILI9341 panel support
Ahmad Fatoum
a.fatoum at pengutronix.de
Wed Feb 2 14:30:23 PST 2022
Port the Linux v5.15 DRM panel driver to barebox. This has been tested
against a STM32F4 LTDC.
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
drivers/video/Kconfig | 11 +
drivers/video/Makefile | 1 +
drivers/video/panel-ilitek-ili9341.c | 541 +++++++++++++++++++++++++++
3 files changed, 553 insertions(+)
create mode 100644 drivers/video/panel-ilitek-ili9341.c
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 70d1d809536b..dcdc6c213591 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -181,4 +181,15 @@ config DRIVER_VIDEO_SIMPLE_PANEL
Linux Kernel implementation this one is able to understand display-timings
nodes so that it's not necessary to keep a list of all known displays
with their corresponding timings in barebox.
+
+config DRIVER_VIDEO_PANEL_ILITEK_ILI9341
+ tristate "Ilitek ILI9341 240x320 QVGA panels"
+ depends on OFTREE && SPI
+ select DRIVER_VIDEO_MIPI_DBI
+ select VIDEO_VPL
+ help
+ Say Y here if you want to enable support for Ilitek IL9341
+ QVGA (240x320) RGB panels. support serial & parallel rgb
+ interface.
+
endif
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a7b70d82072a..9ec0420ccad1 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_DRIVER_VIDEO_MTL017) += mtl017.o
obj-$(CONFIG_DRIVER_VIDEO_TC358767) += tc358767.o
obj-$(CONFIG_DRIVER_VIDEO_SIMPLE_PANEL) += simple-panel.o
obj-$(CONFIG_DRIVER_VIDEO_MIPI_DBI) += mipi_dbi.o
+obj-$(CONFIG_DRIVER_VIDEO_PANEL_ILITEK_ILI9341) += panel-ilitek-ili9341.o
obj-$(CONFIG_DRIVER_VIDEO_ATMEL) += atmel_lcdfb.o atmel_lcdfb_core.o
obj-$(CONFIG_DRIVER_VIDEO_ATMEL_HLCD) += atmel_hlcdfb.o atmel_lcdfb_core.o
diff --git a/drivers/video/panel-ilitek-ili9341.c b/drivers/video/panel-ilitek-ili9341.c
new file mode 100644
index 000000000000..d8774420226d
--- /dev/null
+++ b/drivers/video/panel-ilitek-ili9341.c
@@ -0,0 +1,541 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Ilitek ILI9341 TFT LCD driver.
+ *
+ * This panel can be configured to support:
+ * - 16-bit parallel RGB interface
+ * - 18-bit parallel RGB interface
+ * - 4-line serial spi interface
+ *
+ * Copyright 2018 David Lechner <david at lechnology.com>
+ * Copyright (C) 2021 Dillon Min <dillon.minfei at gmail.com>
+ *
+ * Derived from Linux drivers/drm/gpu/panel/panel-ilitek-ili9341.c
+ */
+#define DEBUG 1
+#include <common.h>
+#include <linux/bitops.h>
+#include <gpiod.h>
+#include <of.h>
+#include <regulator.h>
+#include <spi/spi.h>
+#include <video/vpl.h>
+#include <video/mipi_dbi.h>
+
+#include <video/mipi_display.h>
+
+#define ILI9341_RGB_INTERFACE 0xb0 /* RGB Interface Signal Control */
+#define ILI9341_FRC 0xb1 /* Frame Rate Control register */
+#define ILI9341_DFC 0xb6 /* Display Function Control register */
+#define ILI9341_POWER1 0xc0 /* Power Control 1 register */
+#define ILI9341_POWER2 0xc1 /* Power Control 2 register */
+#define ILI9341_VCOM1 0xc5 /* VCOM Control 1 register */
+#define ILI9341_VCOM2 0xc7 /* VCOM Control 2 register */
+#define ILI9341_POWERA 0xcb /* Power control A register */
+#define ILI9341_POWERB 0xcf /* Power control B register */
+#define ILI9341_PGAMMA 0xe0 /* Positive Gamma Correction register */
+#define ILI9341_NGAMMA 0xe1 /* Negative Gamma Correction register */
+#define ILI9341_DTCA 0xe8 /* Driver timing control A */
+#define ILI9341_DTCB 0xea /* Driver timing control B */
+#define ILI9341_POWER_SEQ 0xed /* Power on sequence register */
+#define ILI9341_3GAMMA_EN 0xf2 /* 3 Gamma enable register */
+#define ILI9341_INTERFACE 0xf6 /* Interface control register */
+#define ILI9341_PRC 0xf7 /* Pump ratio control register */
+#define ILI9341_ETMOD 0xb7 /* Entry mode set */
+
+#define ILI9341_MADCTL_BGR BIT(3)
+#define ILI9341_MADCTL_MV BIT(5)
+#define ILI9341_MADCTL_MX BIT(6)
+#define ILI9341_MADCTL_MY BIT(7)
+
+#define ILI9341_POWER_B_LEN 3
+#define ILI9341_POWER_SEQ_LEN 4
+#define ILI9341_DTCA_LEN 3
+#define ILI9341_DTCB_LEN 2
+#define ILI9341_POWER_A_LEN 5
+#define ILI9341_DFC_1_LEN 2
+#define ILI9341_FRC_LEN 2
+#define ILI9341_VCOM_1_LEN 2
+#define ILI9341_DFC_2_LEN 4
+#define ILI9341_COLUMN_ADDR_LEN 4
+#define ILI9341_PAGE_ADDR_LEN 4
+#define ILI9341_INTERFACE_LEN 3
+#define ILI9341_PGAMMA_LEN 15
+#define ILI9341_NGAMMA_LEN 15
+#define ILI9341_CA_LEN 3
+
+#define ILI9341_PIXEL_DPI_16_BITS (BIT(6) | BIT(4))
+#define ILI9341_PIXEL_DPI_18_BITS (BIT(6) | BIT(5))
+#define ILI9341_GAMMA_CURVE_1 BIT(0)
+#define ILI9341_IF_WE_MODE BIT(0)
+#define ILI9341_IF_BIG_ENDIAN 0x00
+#define ILI9341_IF_DM_RGB BIT(2)
+#define ILI9341_IF_DM_INTERNAL 0x00
+#define ILI9341_IF_DM_VSYNC BIT(3)
+#define ILI9341_IF_RM_RGB BIT(1)
+#define ILI9341_IF_RIM_RGB 0x00
+
+#define ILI9341_COLUMN_ADDR 0x00ef
+#define ILI9341_PAGE_ADDR 0x013f
+
+#define ILI9341_RGB_EPL BIT(0)
+#define ILI9341_RGB_DPL BIT(1)
+#define ILI9341_RGB_HSPL BIT(2)
+#define ILI9341_RGB_VSPL BIT(3)
+#define ILI9341_RGB_DE_MODE BIT(6)
+#define ILI9341_RGB_DISP_PATH_MEM BIT(7)
+
+#define ILI9341_DBI_VCOMH_4P6V 0x23
+#define ILI9341_DBI_PWR_2_DEFAULT 0x10
+#define ILI9341_DBI_PRC_NORMAL 0x20
+#define ILI9341_DBI_VCOM_1_VMH_4P25V 0x3e
+#define ILI9341_DBI_VCOM_1_VML_1P5V 0x28
+#define ILI9341_DBI_VCOM_2_DEC_58 0x86
+#define ILI9341_DBI_FRC_DIVA 0x00
+#define ILI9341_DBI_FRC_RTNA 0x1b
+#define ILI9341_DBI_EMS_GAS BIT(0)
+#define ILI9341_DBI_EMS_DTS BIT(1)
+#define ILI9341_DBI_EMS_GON BIT(2)
+
+/* struct ili9341_config - the system specific ILI9341 configuration */
+struct ili9341_config {
+ u32 max_spi_speed;
+ /* mode: the display mode */
+ const struct fb_videomode mode;
+ /* ca: TODO: need comments for this register */
+ u8 ca[ILI9341_CA_LEN];
+ /* power_b: TODO: need comments for this register */
+ u8 power_b[ILI9341_POWER_B_LEN];
+ /* power_seq: TODO: need comments for this register */
+ u8 power_seq[ILI9341_POWER_SEQ_LEN];
+ /* dtca: TODO: need comments for this register */
+ u8 dtca[ILI9341_DTCA_LEN];
+ /* dtcb: TODO: need comments for this register */
+ u8 dtcb[ILI9341_DTCB_LEN];
+ /* power_a: TODO: need comments for this register */
+ u8 power_a[ILI9341_POWER_A_LEN];
+ /* frc: Frame Rate Control (In Normal Mode/Full Colors) (B1h) */
+ u8 frc[ILI9341_FRC_LEN];
+ /* prc: TODO: need comments for this register */
+ u8 prc;
+ /* dfc_1: B6h DISCTRL (Display Function Control) */
+ u8 dfc_1[ILI9341_DFC_1_LEN];
+ /* power_1: Power Control 1 (C0h) */
+ u8 power_1;
+ /* power_2: Power Control 2 (C1h) */
+ u8 power_2;
+ /* vcom_1: VCOM Control 1(C5h) */
+ u8 vcom_1[ILI9341_VCOM_1_LEN];
+ /* vcom_2: VCOM Control 2(C7h) */
+ u8 vcom_2;
+ /* address_mode: Memory Access Control (36h) */
+ u8 address_mode;
+ /* g3amma_en: TODO: need comments for this register */
+ u8 g3amma_en;
+ /* rgb_interface: RGB Interface Signal Control (B0h) */
+ u8 rgb_interface;
+ /* dfc_2: refer to dfc_1 */
+ u8 dfc_2[ILI9341_DFC_2_LEN];
+ /* column_addr: Column Address Set (2Ah) */
+ u8 column_addr[ILI9341_COLUMN_ADDR_LEN];
+ /* page_addr: Page Address Set (2Bh) */
+ u8 page_addr[ILI9341_PAGE_ADDR_LEN];
+ /* interface: Interface Control (F6h) */
+ u8 interface[ILI9341_INTERFACE_LEN];
+ /*
+ * pixel_format: This command sets the pixel format for the RGB
+ * image data used by
+ */
+ u8 pixel_format;
+ /*
+ * gamma_curve: This command is used to select the desired Gamma
+ * curve for the
+ */
+ u8 gamma_curve;
+ /* pgamma: Positive Gamma Correction (E0h) */
+ u8 pgamma[ILI9341_PGAMMA_LEN];
+ /* ngamma: Negative Gamma Correction (E1h) */
+ u8 ngamma[ILI9341_NGAMMA_LEN];
+};
+
+struct ili9341 {
+ struct device_d *dev;
+ struct vpl vpl;
+ const struct ili9341_config *conf;
+ int reset_gpio;
+ int dc_gpio;
+ struct mipi_dbi *dbi;
+ u32 max_spi_speed;
+ struct regulator_bulk_data supplies[3];
+};
+
+/*
+ * The Stm32f429-disco board has a panel ili9341 connected to ltdc controller
+ */
+static const struct ili9341_config ili9341_stm32f429_disco_data = {
+ .max_spi_speed = 10000000,
+ .mode = {
+ .name = "240x320",
+ .xres = 240,
+ .yres = 320,
+ .pixclock = KHZ2PICOS(6100),
+ .left_margin = 10,
+ .hsync_len = 10,
+ .right_margin = 20,
+ .upper_margin = 4,
+ .lower_margin = 2,
+ .vsync_len = 2,
+ },
+ .ca = {0xc3, 0x08, 0x50},
+ .power_b = {0x00, 0xc1, 0x30},
+ .power_seq = {0x64, 0x03, 0x12, 0x81},
+ .dtca = {0x85, 0x00, 0x78},
+ .power_a = {0x39, 0x2c, 0x00, 0x34, 0x02},
+ .prc = 0x20,
+ .dtcb = {0x00, 0x00},
+ /* 0x00 fosc, 0x1b 70hz */
+ .frc = {0x00, 0x1b},
+ /*
+ * 0x0a Interval scan, AGND AGND AGND AGND
+ * 0xa2 Normally white, G1 -> G320, S720 -> S1,
+ * Scan Cycle 5 frames,85ms
+ */
+ .dfc_1 = {0x0a, 0xa2},
+ /* 0x10 3.65v */
+ .power_1 = 0x10,
+ /* 0x10 AVDD=vci*2, VGH=vci*7, VGL=-vci*4 */
+ .power_2 = 0x10,
+ /* 0x45 VCOMH 4.425v, 0x15 VCOML -1.975*/
+ .vcom_1 = {0x45, 0x15},
+ /* 0x90 offset voltage, VMH-48, VML-48 */
+ .vcom_2 = 0x90,
+ /*
+ * 0xc8 Row Address Order, Column Address Order
+ * BGR 1
+ */
+ .address_mode = 0xc8,
+ .g3amma_en = 0x00,
+ /*
+ * 0xc2
+ * Display Data Path: Memory
+ * RGB: DE mode
+ * DOTCLK polarity set (data fetched at the falling time)
+ */
+ .rgb_interface = ILI9341_RGB_DISP_PATH_MEM |
+ ILI9341_RGB_DE_MODE |
+ ILI9341_RGB_DPL,
+ /*
+ * 0x0a
+ * Gate outputs in non-display area: Interval scan
+ * Determine source/VCOM output in a non-display area in the partial
+ * display mode: AGND AGND AGND AGND
+ *
+ * 0xa7
+ * Scan Cycle: 15 frames
+ * fFLM = 60Hz: 255ms
+ * Liquid crystal type: Normally white
+ * Gate Output Scan Direction: G1 -> G320
+ * Source Output Scan Direction: S720 -> S1
+ *
+ * 0x27
+ * LCD Driver Line: 320 lines
+ *
+ * 0x04
+ * PCDIV: 4
+ */
+ .dfc_2 = {0x0a, 0xa7, 0x27, 0x04},
+ /* column address: 240 */
+ .column_addr = {0x00, 0x00, (ILI9341_COLUMN_ADDR >> 4) & 0xff,
+ ILI9341_COLUMN_ADDR & 0xff},
+ /* page address: 320 */
+ .page_addr = {0x00, 0x00, (ILI9341_PAGE_ADDR >> 4) & 0xff,
+ ILI9341_PAGE_ADDR & 0xff},
+ /*
+ * Memory write control: When the transfer number of data exceeds
+ * (EC-SC+1)*(EP-SP+1), the column and page number will be
+ * reset, and the exceeding data will be written into the following
+ * column and page.
+ * Display Operation Mode: RGB Interface Mode
+ * Interface for RAM Access: RGB interface
+ * 16- bit RGB interface (1 transfer/pixel)
+ */
+ .interface = {ILI9341_IF_WE_MODE, 0x00,
+ ILI9341_IF_DM_RGB | ILI9341_IF_RM_RGB},
+ /* DPI: 16 bits / pixel */
+ .pixel_format = ILI9341_PIXEL_DPI_16_BITS,
+ /* Curve Selected: Gamma curve 1 (G2.2) */
+ .gamma_curve = ILI9341_GAMMA_CURVE_1,
+ .pgamma = {0x0f, 0x29, 0x24, 0x0c, 0x0e,
+ 0x09, 0x4e, 0x78, 0x3c, 0x09,
+ 0x13, 0x05, 0x17, 0x11, 0x00},
+ .ngamma = {0x00, 0x16, 0x1b, 0x04, 0x11,
+ 0x07, 0x31, 0x33, 0x42, 0x05,
+ 0x0c, 0x0a, 0x28, 0x2f, 0x0f},
+};
+
+static inline struct ili9341 *vpl_to_ili9341(struct vpl *vpl)
+{
+ return container_of(vpl, struct ili9341, vpl);
+}
+
+static void ili9341_dpi_init(struct ili9341 *ili)
+{
+ struct device_d *dev = ili->dev;
+ struct mipi_dbi *dbi = ili->dbi;
+ struct ili9341_config *cfg = (struct ili9341_config *)ili->conf;
+
+ /* Power Control */
+ mipi_dbi_command_stackbuf(dbi, 0xca, cfg->ca, ILI9341_CA_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_POWERB, cfg->power_b,
+ ILI9341_POWER_B_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_POWER_SEQ, cfg->power_seq,
+ ILI9341_POWER_SEQ_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_DTCA, cfg->dtca,
+ ILI9341_DTCA_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_POWERA, cfg->power_a,
+ ILI9341_POWER_A_LEN);
+ mipi_dbi_command(ili->dbi, ILI9341_PRC, cfg->prc);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_DTCB, cfg->dtcb,
+ ILI9341_DTCB_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_FRC, cfg->frc, ILI9341_FRC_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_1,
+ ILI9341_DFC_1_LEN);
+ mipi_dbi_command(dbi, ILI9341_POWER1, cfg->power_1);
+ mipi_dbi_command(dbi, ILI9341_POWER2, cfg->power_2);
+
+ /* VCOM */
+ mipi_dbi_command_stackbuf(dbi, ILI9341_VCOM1, cfg->vcom_1,
+ ILI9341_VCOM_1_LEN);
+ mipi_dbi_command(dbi, ILI9341_VCOM2, cfg->vcom_2);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, cfg->address_mode);
+
+ /* Gamma */
+ mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, cfg->g3amma_en);
+ mipi_dbi_command(dbi, ILI9341_RGB_INTERFACE, cfg->rgb_interface);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_2,
+ ILI9341_DFC_2_LEN);
+
+ /* Colomn address set */
+ mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_COLUMN_ADDRESS,
+ cfg->column_addr, ILI9341_COLUMN_ADDR_LEN);
+
+ /* Page address set */
+ mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_PAGE_ADDRESS,
+ cfg->page_addr, ILI9341_PAGE_ADDR_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_INTERFACE, cfg->interface,
+ ILI9341_INTERFACE_LEN);
+
+ /* Format */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, cfg->pixel_format);
+ mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START);
+ mdelay(200);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, cfg->gamma_curve);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_PGAMMA, cfg->pgamma,
+ ILI9341_PGAMMA_LEN);
+ mipi_dbi_command_stackbuf(dbi, ILI9341_NGAMMA, cfg->ngamma,
+ ILI9341_NGAMMA_LEN);
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+ mdelay(200);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+ mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START);
+
+ dev_info(dev, "Initialized display rgb interface\n");
+}
+
+static int ili9341_dpi_power_on(struct ili9341 *ili)
+{
+ struct device_d *dev = ili->dev;
+ int ret = 0;
+
+ /* Assert RESET */
+ gpiod_set_value(ili->reset_gpio, 1);
+
+ /* Enable power */
+ ret = regulator_bulk_enable(ARRAY_SIZE(ili->supplies),
+ ili->supplies);
+ if (ret < 0) {
+ dev_err(dev, "unable to enable vcc\n");
+ return ret;
+ }
+ mdelay(20);
+
+ /* De-assert RESET */
+ gpiod_set_value(ili->reset_gpio, 0);
+ mdelay(20);
+
+ return 0;
+}
+
+static int ili9341_dpi_power_off(struct ili9341 *ili)
+{
+ /* Assert RESET */
+ gpiod_set_value(ili->reset_gpio, 1);
+
+ /* Disable power */
+ return regulator_bulk_disable(ARRAY_SIZE(ili->supplies),
+ ili->supplies);
+}
+
+static void ili9341_dpi_disable(struct ili9341 *ili)
+{
+ mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_OFF);
+}
+
+static int ili9341_dpi_prepare(struct ili9341 *ili)
+{
+ int ret;
+
+ ret = ili9341_dpi_power_on(ili);
+ if (ret < 0)
+ return ret;
+
+ ili9341_dpi_init(ili);
+
+ return ret;
+}
+
+static void ili9341_dpi_enable(struct ili9341 *ili)
+{
+ mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_ON);
+}
+
+static int ili9341_dpi_get_modes(struct ili9341 *ili,
+ struct display_timings *timings)
+{
+ struct fb_videomode *mode;
+
+ mode = memdup(&ili->conf->mode, sizeof(*mode));
+ if (!mode)
+ return -ENOMEM;
+
+ /*
+ * These are from the PoV of the display controller, so
+ * DPL=1 => display samples at positive edge
+ * => controller drives at negative edge
+ */
+ if (ili->conf->rgb_interface & ILI9341_RGB_DPL)
+ mode->display_flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+ else
+ mode->display_flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
+
+ if (ili->conf->rgb_interface & ILI9341_RGB_EPL)
+ mode->display_flags |= DISPLAY_FLAGS_DE_HIGH;
+ else
+ mode->display_flags |= DISPLAY_FLAGS_DE_LOW;
+
+ /* Set up the polarity */
+ if (ili->conf->rgb_interface & ILI9341_RGB_HSPL)
+ mode->sync |= FB_SYNC_HOR_HIGH_ACT;
+
+ if (ili->conf->rgb_interface & ILI9341_RGB_VSPL)
+ mode->sync |= FB_SYNC_VERT_HIGH_ACT;
+
+ timings->modes = mode;
+ timings->num_modes = 1;
+ return 0;
+}
+
+static int ili9341_ioctl(struct vpl *vpl, unsigned int port,
+ unsigned int cmd, void *ptr)
+{
+ struct ili9341 *ili = vpl_to_ili9341(vpl);
+
+ switch (cmd) {
+ case VPL_PREPARE:
+ return ili9341_dpi_prepare(ili);
+ case VPL_ENABLE:
+ ili9341_dpi_enable(ili);
+ return 0;
+ case VPL_DISABLE:
+ ili9341_dpi_disable(ili);
+ return 0;
+ case VPL_UNPREPARE:
+ return ili9341_dpi_power_off(ili);
+ case VPL_GET_VIDEOMODES:
+ return ili9341_dpi_get_modes(ili, ptr);
+ default:
+ return 0;
+ }
+}
+
+static int ili9341_dpi_probe(struct spi_device *spi, int dc, int reset)
+{
+ struct device_d *dev = &spi->dev;
+ struct ili9341 *ili;
+ int ret;
+
+ ili = kzalloc(sizeof(struct ili9341), GFP_KERNEL);
+ if (!ili)
+ return -ENOMEM;
+
+ ili->dbi = kzalloc(sizeof(struct mipi_dbi), GFP_KERNEL);
+ if (!ili->dbi)
+ return -ENOMEM;
+
+ ili->supplies[0].supply = "vci";
+ ili->supplies[1].supply = "vddi";
+ ili->supplies[2].supply = "vddi-led";
+ ret = regulator_bulk_get(dev, ARRAY_SIZE(ili->supplies),
+ ili->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to get regulators: %d\n", ret);
+ return ret;
+ }
+
+ ret = mipi_dbi_spi_init(spi, ili->dbi, dc);
+ if (ret)
+ return ret;
+
+ ili->reset_gpio = reset;
+ /*
+ * Every new incarnation of this display must have a unique
+ * data entry for the system in this driver.
+ */
+ ili->conf = device_get_match_data(dev);
+ if (!ili->conf) {
+ dev_err(dev, "missing device configuration\n");
+ return -ENODEV;
+ }
+
+ ili->dev = dev;
+ ili->max_spi_speed = ili->conf->max_spi_speed;
+ ili->vpl.node = dev->device_node;
+ ili->vpl.ioctl = ili9341_ioctl;
+
+ return vpl_register(&ili->vpl);
+}
+
+static int ili9341_probe(struct device_d *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ int dc, reset;
+
+ reset = gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (!gpio_is_valid(reset) && reset != -ENOENT)
+ dev_err(dev, "Failed to get gpio 'reset'\n");
+
+ dc = gpiod_get(dev, "dc", GPIOD_OUT_LOW);
+ if (!gpio_is_valid(dc) && dc != -ENOENT)
+ dev_err(dev, "Failed to get gpio 'dc'\n");
+
+ return ili9341_dpi_probe(spi, dc, reset);
+}
+
+static const struct of_device_id ili9341_of_match[] = {
+ {
+ .compatible = "st,sf-tc240t-9370-t",
+ .data = &ili9341_stm32f429_disco_data,
+ },
+ { }
+};
+
+static struct driver_d ili9341_driver = {
+ .name = "panel-ilitek-ili9341",
+ .of_compatible = ili9341_of_match,
+ .probe = ili9341_probe,
+};
+device_spi_driver(ili9341_driver);
+
+MODULE_AUTHOR("Dillon Min <dillon.minfei at gmail.com>");
+MODULE_DESCRIPTION("ILI9341 LCD panel driver");
+MODULE_LICENSE("GPL v2");
--
2.30.2
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