video: add support for Solomon SSD1307 OLED controller family
It was ported from linux v4.10. Like the kernel driver only communication via I2C is supported. It has only been tested with a SSD1306 and a 96x16 OLED display: &i2c0 { status = "okay"; ssd1306: oled@3c { compatible = "solomon,ssd1306fb-i2c"; reg = <0x3c>; reset-gpios = <&gpio1 1 0>; solomon,height = <16>; solomon,width = <96>; solomon,page-offset = <0>; solomon,com-invdir; solomon,com-seq; }; Signed-off-by: Bastian Stender <bst@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
parent
b9cf45f00c
commit
52e9a842e3
|
@ -12,6 +12,10 @@ config FRAMEBUFFER_CONSOLE
|
|||
select FONTS
|
||||
prompt "framebuffer console support"
|
||||
|
||||
config DRIVER_VIDEO_FB_SSD1307
|
||||
bool "Solomon SSD1307 framebuffer support"
|
||||
depends on I2C && GPIOLIB
|
||||
|
||||
config VIDEO_VPL
|
||||
depends on OFTREE
|
||||
bool
|
||||
|
|
|
@ -21,3 +21,4 @@ obj-$(CONFIG_DRIVER_VIDEO_OMAP) += omap.o
|
|||
obj-$(CONFIG_DRIVER_VIDEO_BCM283X) += bcm2835.o
|
||||
obj-$(CONFIG_DRIVER_VIDEO_SIMPLEFB) += simplefb.o
|
||||
obj-$(CONFIG_DRIVER_VIDEO_IMX_IPUV3) += imx-ipu-v3/
|
||||
obj-$(CONFIG_DRIVER_VIDEO_FB_SSD1307) += ssd1307fb.o
|
||||
|
|
|
@ -0,0 +1,567 @@
|
|||
/*
|
||||
* Driver for the Solomon SSD1307 OLED controller family
|
||||
*
|
||||
* Supports:
|
||||
* - SSD1305 (untested)
|
||||
* - SSD1306
|
||||
* - SSD1309 (untested)
|
||||
*
|
||||
* The SSD1307 controller is currently unsupported as the PWM parts were not
|
||||
* ported.
|
||||
*
|
||||
* Copyright 2012 Maxime Ripard <maxime.ripard@free-electrons.com>, Free Electrons
|
||||
*
|
||||
* Ported to barebox from linux v4.10
|
||||
* Copyright (C) 2017 Pengutronix, Bastian Stender <kernel@pengutronix.de>
|
||||
*
|
||||
* Licensed under the GPLv2 or later.
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
#include <init.h>
|
||||
#include <fb.h>
|
||||
#include <i2c/i2c.h>
|
||||
#include <of_device.h>
|
||||
#include <gpio.h>
|
||||
#include <of_gpio.h>
|
||||
|
||||
#define SSD1307FB_DATA 0x40
|
||||
#define SSD1307FB_COMMAND 0x80
|
||||
|
||||
#define SSD1307FB_SET_ADDRESS_MODE 0x20
|
||||
#define SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL (0x00)
|
||||
#define SSD1307FB_SET_ADDRESS_MODE_VERTICAL (0x01)
|
||||
#define SSD1307FB_SET_ADDRESS_MODE_PAGE (0x02)
|
||||
#define SSD1307FB_SET_COL_RANGE 0x21
|
||||
#define SSD1307FB_SET_PAGE_RANGE 0x22
|
||||
#define SSD1307FB_CONTRAST 0x81
|
||||
#define SSD1307FB_CHARGE_PUMP 0x8d
|
||||
#define SSD1307FB_SEG_REMAP_ON 0xa1
|
||||
#define SSD1307FB_DISPLAY_OFF 0xae
|
||||
#define SSD1307FB_SET_MULTIPLEX_RATIO 0xa8
|
||||
#define SSD1307FB_DISPLAY_ON 0xaf
|
||||
#define SSD1307FB_START_PAGE_ADDRESS 0xb0
|
||||
#define SSD1307FB_SET_DISPLAY_OFFSET 0xd3
|
||||
#define SSD1307FB_SET_CLOCK_FREQ 0xd5
|
||||
#define SSD1307FB_SET_PRECHARGE_PERIOD 0xd9
|
||||
#define SSD1307FB_SET_COM_PINS_CONFIG 0xda
|
||||
#define SSD1307FB_SET_VCOMH 0xdb
|
||||
|
||||
struct ssd1307fb_deviceinfo {
|
||||
u32 default_vcomh;
|
||||
u32 default_dclk_div;
|
||||
u32 default_dclk_frq;
|
||||
int need_chargepump;
|
||||
};
|
||||
|
||||
struct ssd1307fb_par {
|
||||
u32 com_invdir;
|
||||
u32 com_lrremap;
|
||||
u32 com_offset;
|
||||
u32 com_seq;
|
||||
u32 contrast;
|
||||
u32 dclk_div;
|
||||
u32 dclk_frq;
|
||||
const struct ssd1307fb_deviceinfo *device_info;
|
||||
struct i2c_client *client;
|
||||
u32 height;
|
||||
struct fb_info *info;
|
||||
u32 page_offset;
|
||||
u32 prechargep1;
|
||||
u32 prechargep2;
|
||||
int reset;
|
||||
u32 seg_remap;
|
||||
u32 vcomh;
|
||||
u32 width;
|
||||
};
|
||||
|
||||
struct ssd1307fb_array {
|
||||
u8 type;
|
||||
u8 data[0];
|
||||
};
|
||||
|
||||
static struct ssd1307fb_array *ssd1307fb_alloc_array(u32 len, u8 type)
|
||||
{
|
||||
struct ssd1307fb_array *array;
|
||||
|
||||
array = kzalloc(sizeof(struct ssd1307fb_array) + len, GFP_KERNEL);
|
||||
if (!array)
|
||||
return NULL;
|
||||
|
||||
array->type = type;
|
||||
|
||||
return array;
|
||||
}
|
||||
|
||||
static int ssd1307fb_write_array(struct i2c_client *client,
|
||||
struct ssd1307fb_array *array, u32 len)
|
||||
{
|
||||
int ret;
|
||||
|
||||
len += sizeof(struct ssd1307fb_array);
|
||||
|
||||
ret = i2c_master_send(client, (u8 *)array, len);
|
||||
if (ret != len) {
|
||||
dev_err(&client->dev, "Couldn't send I2C command.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int ssd1307fb_write_cmd(struct i2c_client *client, u8 cmd)
|
||||
{
|
||||
struct ssd1307fb_array *array;
|
||||
int ret;
|
||||
|
||||
array = ssd1307fb_alloc_array(1, SSD1307FB_COMMAND);
|
||||
if (!array)
|
||||
return -ENOMEM;
|
||||
|
||||
array->data[0] = cmd;
|
||||
|
||||
ret = ssd1307fb_write_array(client, array, 1);
|
||||
kfree(array);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void ssd1307fb_update_display(struct ssd1307fb_par *par)
|
||||
{
|
||||
struct ssd1307fb_array *array;
|
||||
u8 *vmem = par->info->screen_base;
|
||||
int i, j, k;
|
||||
|
||||
array = ssd1307fb_alloc_array(par->width * par->height / 8,
|
||||
SSD1307FB_DATA);
|
||||
if (!array)
|
||||
return;
|
||||
|
||||
/*
|
||||
* The screen is divided in pages, each having a height of 8
|
||||
* pixels, and the width of the screen. When sending a byte of
|
||||
* data to the controller, it gives the 8 bits for the current
|
||||
* column. I.e, the first byte are the 8 bits of the first
|
||||
* column, then the 8 bits for the second column, etc.
|
||||
*
|
||||
*
|
||||
* Representation of the screen, assuming it is 5 bits
|
||||
* wide. Each letter-number combination is a bit that controls
|
||||
* one pixel.
|
||||
*
|
||||
* A0 A1 A2 A3 A4
|
||||
* B0 B1 B2 B3 B4
|
||||
* C0 C1 C2 C3 C4
|
||||
* D0 D1 D2 D3 D4
|
||||
* E0 E1 E2 E3 E4
|
||||
* F0 F1 F2 F3 F4
|
||||
* G0 G1 G2 G3 G4
|
||||
* H0 H1 H2 H3 H4
|
||||
*
|
||||
* If you want to update this screen, you need to send 5 bytes:
|
||||
* (1) A0 B0 C0 D0 E0 F0 G0 H0
|
||||
* (2) A1 B1 C1 D1 E1 F1 G1 H1
|
||||
* (3) A2 B2 C2 D2 E2 F2 G2 H2
|
||||
* (4) A3 B3 C3 D3 E3 F3 G3 H3
|
||||
* (5) A4 B4 C4 D4 E4 F4 G4 H4
|
||||
*/
|
||||
|
||||
for (i = 0; i < (par->height / 8); i++) {
|
||||
for (j = 0; j < par->width; j++) {
|
||||
u32 array_idx = i * par->width + j;
|
||||
array->data[array_idx] = 0;
|
||||
for (k = 0; k < 8; k++) {
|
||||
u32 page_length = par->width * i * 8;
|
||||
u32 index = page_length + (par->width * k + j);
|
||||
u8 byte = *(vmem + index);
|
||||
/* convert to 1 bit per pixel */
|
||||
u8 bit = byte > 0;
|
||||
array->data[array_idx] |= bit << k;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ssd1307fb_write_array(par->client, array, par->width * par->height / 8);
|
||||
kfree(array);
|
||||
}
|
||||
|
||||
static void ssd1307fb_enable(struct fb_info *info)
|
||||
{
|
||||
struct ssd1307fb_par *par = info->priv;
|
||||
ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);
|
||||
}
|
||||
|
||||
static void ssd1307fb_disable(struct fb_info *info)
|
||||
{
|
||||
struct ssd1307fb_par *par = info->priv;
|
||||
ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_OFF);
|
||||
}
|
||||
|
||||
static void ssd1307fb_flush(struct fb_info *info)
|
||||
{
|
||||
struct ssd1307fb_par *par = info->priv;
|
||||
ssd1307fb_update_display(par);
|
||||
}
|
||||
|
||||
static struct fb_ops ssd1307fb_ops = {
|
||||
.fb_enable = ssd1307fb_enable,
|
||||
.fb_disable = ssd1307fb_disable,
|
||||
.fb_flush = ssd1307fb_flush,
|
||||
};
|
||||
|
||||
static int ssd1307fb_init(struct ssd1307fb_par *par)
|
||||
{
|
||||
int ret;
|
||||
u32 precharge, dclk, com_invdir, compins;
|
||||
|
||||
/* Set initial contrast */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, par->contrast);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set segment re-map */
|
||||
if (par->seg_remap) {
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
};
|
||||
|
||||
/* Set COM direction */
|
||||
com_invdir = 0xc0 | (par->com_invdir & 0x1) << 3;
|
||||
ret = ssd1307fb_write_cmd(par->client, com_invdir);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set multiplex ratio value */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_MULTIPLEX_RATIO);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, par->height - 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* set display offset value */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_DISPLAY_OFFSET);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, par->com_offset);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set clock frequency */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_CLOCK_FREQ);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
dclk = ((par->dclk_div - 1) & 0xf) | (par->dclk_frq & 0xf) << 4;
|
||||
ret = ssd1307fb_write_cmd(par->client, dclk);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set precharge period in number of ticks from the internal clock */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PRECHARGE_PERIOD);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
precharge = (par->prechargep1 & 0xf) | (par->prechargep2 & 0xf) << 4;
|
||||
ret = ssd1307fb_write_cmd(par->client, precharge);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set COM pins configuration */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COM_PINS_CONFIG);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
compins = 0x02 | !(par->com_seq & 0x1) << 4
|
||||
| (par->com_lrremap & 0x1) << 5;
|
||||
ret = ssd1307fb_write_cmd(par->client, compins);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set VCOMH */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_VCOMH);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, par->vcomh);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Turn on the DC-DC Charge Pump */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CHARGE_PUMP);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client,
|
||||
BIT(4) | (par->device_info->need_chargepump ? BIT(2) : 0));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Switch to horizontal addressing mode */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_ADDRESS_MODE);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client,
|
||||
SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set column range */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, par->width - 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Set page range */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client, 0x0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = ssd1307fb_write_cmd(par->client,
|
||||
par->page_offset + (par->height / 8) - 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Turn on the display */
|
||||
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct ssd1307fb_deviceinfo ssd1307fb_ssd1305_deviceinfo = {
|
||||
.default_vcomh = 0x34,
|
||||
.default_dclk_div = 1,
|
||||
.default_dclk_frq = 7,
|
||||
};
|
||||
|
||||
static struct ssd1307fb_deviceinfo ssd1307fb_ssd1306_deviceinfo = {
|
||||
.default_vcomh = 0x20,
|
||||
.default_dclk_div = 1,
|
||||
.default_dclk_frq = 8,
|
||||
.need_chargepump = 1,
|
||||
};
|
||||
|
||||
static struct ssd1307fb_deviceinfo ssd1307fb_ssd1309_deviceinfo = {
|
||||
.default_vcomh = 0x34,
|
||||
.default_dclk_div = 1,
|
||||
.default_dclk_frq = 10,
|
||||
};
|
||||
|
||||
static const struct of_device_id ssd1307fb_of_match[] = {
|
||||
{
|
||||
.compatible = "solomon,ssd1305fb-i2c",
|
||||
.data = (void *)&ssd1307fb_ssd1305_deviceinfo,
|
||||
},
|
||||
{
|
||||
.compatible = "solomon,ssd1306fb-i2c",
|
||||
.data = (void *)&ssd1307fb_ssd1306_deviceinfo,
|
||||
},
|
||||
{
|
||||
.compatible = "solomon,ssd1309fb-i2c",
|
||||
.data = (void *)&ssd1307fb_ssd1309_deviceinfo,
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static int ssd1307fb_probe(struct device_d *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct fb_info *info;
|
||||
struct device_node *node = dev->device_node;
|
||||
const struct of_device_id *match =
|
||||
of_match_node(ssd1307fb_of_match, dev->device_node);
|
||||
u32 vmem_size;
|
||||
struct ssd1307fb_par *par;
|
||||
struct ssd1307fb_array *array;
|
||||
u8 *vmem;
|
||||
int ret;
|
||||
int i, j;
|
||||
|
||||
if (!node) {
|
||||
dev_err(&client->dev, "No device tree data found!\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
info = xzalloc(sizeof(struct fb_info));
|
||||
|
||||
par = info->priv;
|
||||
par->info = info;
|
||||
par->client = client;
|
||||
|
||||
par->device_info = (struct ssd1307fb_deviceinfo *)match->data;
|
||||
|
||||
par->reset = of_get_named_gpio(node,
|
||||
"reset-gpios", 0);
|
||||
if (!gpio_is_valid(par->reset)) {
|
||||
ret = par->reset;
|
||||
if (ret != -EPROBE_DEFER)
|
||||
dev_err(&client->dev,
|
||||
"Couldn't get named gpio 'reset-gpios': %s.\n",
|
||||
strerror(-ret));
|
||||
goto fb_alloc_error;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32(node, "solomon,width", &par->width);
|
||||
if (ret) {
|
||||
dev_err(&client->dev,
|
||||
"Couldn't find 'solomon,width' in device tree.\n");
|
||||
goto panel_init_error;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32(node, "solomon,height", &par->height);
|
||||
if (ret) {
|
||||
dev_err(&client->dev,
|
||||
"Couldn't find 'solomon,height' in device tree.\n");
|
||||
goto panel_init_error;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32(node, "solomon,page-offset",
|
||||
&par->page_offset);
|
||||
if (ret) {
|
||||
dev_err(&client->dev,
|
||||
"Couldn't find 'solomon,page_offset' in device tree.\n");
|
||||
goto panel_init_error;
|
||||
}
|
||||
|
||||
if (of_property_read_u32(node, "solomon,com-offset", &par->com_offset))
|
||||
par->com_offset = 0;
|
||||
|
||||
if (of_property_read_u32(node, "solomon,prechargep1",
|
||||
&par->prechargep1))
|
||||
par->prechargep1 = 2;
|
||||
|
||||
if (of_property_read_u32(node, "solomon,prechargep2",
|
||||
&par->prechargep2))
|
||||
par->prechargep2 = 2;
|
||||
|
||||
par->seg_remap = !of_property_read_bool(node,
|
||||
"solomon,segment-no-remap");
|
||||
par->com_seq = of_property_read_bool(node, "solomon,com-seq");
|
||||
par->com_lrremap = of_property_read_bool(node, "solomon,com-lrremap");
|
||||
par->com_invdir = of_property_read_bool(node, "solomon,com-invdir");
|
||||
|
||||
par->contrast = 127;
|
||||
par->vcomh = par->device_info->default_vcomh;
|
||||
|
||||
/* Setup display timing */
|
||||
par->dclk_div = par->device_info->default_dclk_div;
|
||||
par->dclk_frq = par->device_info->default_dclk_frq;
|
||||
|
||||
vmem_size = par->width * par->height;
|
||||
|
||||
vmem = malloc(vmem_size);
|
||||
if (!vmem) {
|
||||
dev_err(&client->dev, "Couldn't allocate graphical memory.\n");
|
||||
ret = -ENOMEM;
|
||||
goto fb_alloc_error;
|
||||
}
|
||||
|
||||
info->fbops = &ssd1307fb_ops;
|
||||
info->line_length = par->width;
|
||||
|
||||
info->xres = par->width;
|
||||
info->yres = par->height;
|
||||
|
||||
/* emulate 8 bit per pixel */
|
||||
info->bits_per_pixel = 8;
|
||||
|
||||
info->red.length = 3;
|
||||
info->red.offset = 0;
|
||||
info->green.length = 3;
|
||||
info->green.offset = 0;
|
||||
info->blue.length = 2;
|
||||
info->blue.offset = 0;
|
||||
|
||||
info->screen_base = (u8 __force __iomem *)vmem;
|
||||
|
||||
ret = gpio_request_one(par->reset,
|
||||
GPIOF_OUT_INIT_HIGH,
|
||||
"oled-reset");
|
||||
if (ret) {
|
||||
dev_err(&client->dev,
|
||||
"failed to request gpio %d: %d\n",
|
||||
par->reset, ret);
|
||||
goto reset_oled_error;
|
||||
}
|
||||
|
||||
i2c_set_clientdata(client, info);
|
||||
|
||||
/* Reset the screen */
|
||||
gpio_set_value(par->reset, 0);
|
||||
udelay(4);
|
||||
gpio_set_value(par->reset, 1);
|
||||
udelay(4);
|
||||
|
||||
ret = ssd1307fb_init(par);
|
||||
if (ret)
|
||||
goto reset_oled_error;
|
||||
|
||||
ret = register_framebuffer(info);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "Couldn't register the framebuffer\n");
|
||||
goto panel_init_error;
|
||||
}
|
||||
|
||||
/* clear display */
|
||||
array = ssd1307fb_alloc_array(par->width * par->height / 8,
|
||||
SSD1307FB_DATA);
|
||||
if (!array)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < (par->height / 8); i++) {
|
||||
for (j = 0; j < par->width; j++) {
|
||||
u32 array_idx = i * par->width + j;
|
||||
array->data[array_idx] = 0;
|
||||
}
|
||||
}
|
||||
|
||||
ssd1307fb_write_array(par->client, array, par->width * par->height / 8);
|
||||
kfree(array);
|
||||
|
||||
dev_info(&client->dev,
|
||||
"ssd1307 framebuffer device registered, using %d bytes of video memory\n",
|
||||
vmem_size);
|
||||
|
||||
return 0;
|
||||
|
||||
panel_init_error:
|
||||
reset_oled_error:
|
||||
fb_alloc_error:
|
||||
free(info);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct driver_d ssd1307fb_driver = {
|
||||
.name = "ssd1307fb",
|
||||
.probe = ssd1307fb_probe,
|
||||
.of_compatible = DRV_OF_COMPAT(ssd1307fb_of_match),
|
||||
};
|
||||
|
||||
static int ssd1307_init(void)
|
||||
{
|
||||
i2c_driver_register(&ssd1307fb_driver);
|
||||
return 0;
|
||||
}
|
||||
|
||||
device_initcall(ssd1307_init);
|
Loading…
Reference in New Issue