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楼主 # 2022-06-10 15:29:59

Gentlepig
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请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

自制v3s板,串口2作为调试口,板载w25q128作为存储。

下载uboot2022,参考坑网教程修改uboot的设备树,添加了uart2部分,现在可以用uart2作为调试口了。
参照licheepi的uboot2017的spi版的设备树和defconfig文件作了修改。用sunxi-fel命令烧录uboot到spi flash里有,可以启动SPL,但是进入uboot后检测不到spi flash,然后就不停重启。
进入命令行模式后,输入sf probe 0,也是报错。

U-Boot SPL 2022.07-rc4 (Jun 10 2022 - 15:27:40 +0800)
DRAM: 64 MiB
Trying to boot from sunxi SPI


U-Boot 2022.07-rc4 (Jun 10 2022 - 15:27:40 +0800) Allwinner Technology

CPU:   Allwinner V3s (SUN8I 1681)
Model: Lichee Pi Zero
DRAM:  64 MiB
Core:  34 devices, 15 uclasses, devicetree: separate
WDT:   Not starting watchdog@1c20ca0
MMC:   mmc@1c0f000: 0
Loading Environment from SPIFlash... 
sun4i_spi spi@1c68000: Invalid chip select 0:0 (err=-19)
*** Warning - spi_flash_probe_bus_cs() failed, using default environment

Loading Environment from FAT... Card did not respond to voltage select! : -110
** Bad device specification mmc 0 **
In:    serial@1c28800
Out:   serial@1c28800
Err:   serial@1c28800
Net:   No ethernet found.
Hit any key to stop autoboot:  0 
=> sf probe 0
bus:0, cs:0, speed:1000000, mode:0
sun4i_spi spi@1c68000: Invalid chip select 0:0 (err=-19)
=> 

搜索Invalid chip select这句,在uboot/drivers/spi-uclass.c里的 int spi_get_bus_and_cs( )函数里找到了,错误19代表是无器件。

int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp)
{
	struct dm_spi_ops *ops;
	struct spi_cs_info info;
	struct udevice *dev;
	int ret;

	/*
	 * Ask the driver. For the moment we don't have CS info.
	 * When we do we could provide the driver with a helper function
	 * to figure out what chip selects are valid, or just handle the
	 * request.
	 */
	ops = spi_get_ops(bus);
	if (ops->cs_info) {
		ret = ops->cs_info(bus, cs, &info);
	} else {
		/*
		 * We could assume there is at least one valid chip select.
		 * The driver didn't care enough to tell us.
		 */
		ret = 0;
	}

	if (ret) {
		dev_err(bus, "Invalid cs %d (err=%d)\n", cs, ret);
		return ret;
	}

	for (device_find_first_child(bus, &dev); dev;
	     device_find_next_child(&dev)) {
		struct dm_spi_slave_plat *plat;

		plat = dev_get_parent_plat(dev);
		dev_dbg(bus, "%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
		printf("%s: plat=%p, plat->cs=%d, cs=%d\n", __func__, plat, plat->cs, cs);
		if (plat->cs == cs) {
			*devp = dev;
			return 0;
		}
	}

	return -ENODEV;
}

该函数中最后部分的for循环里,device_find_first_child(bus, &dev) 没有得到dev的值,所以一次也没有循环。

for (device_find_first_child(bus, &dev); dev;
         device_find_next_child(&dev)) {
        struct dm_spi_slave_plat *plat;

        plat = dev_get_parent_plat(dev);
        dev_dbg(bus, "%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
        printf("%s: plat=%p, plat->cs=%d, cs=%d\n", __func__, plat, plat->cs, cs);
        if (plat->cs == cs) {
            *devp = dev;
            return 0;
        }
    }

device_find_first_child( )函数里判断&parent->child_head是空的,但为什么会是空的呢?也尝试将parent这个指针打印出来,是:

int device_find_first_child(const struct udevice *parent, struct udevice **devp)
{
	printf("parent:%d\r\n", parent);
	printf("parent name:%s\r\n", &parent->name);
	printf("parent drive name:%s\r\n", &parent->driver->name);
    if (list_empty(&parent->child_head)) {
        printf("dev是空的\r\n");
        *devp = NULL;
    } else {
        printf("dev不是空的\r\n");
        *devp = list_first_entry(&parent->child_head, struct udevice,
                     sibling_node);
    }

    return 0;
}
=> sf probe 0  
parent:1138158968                                               
parent name:CC                                             
parent drive name:vCc                                         
dev是空的                                                       
parent:1138158972                                               
parent name:CC                                             
parent drive name:vCc                                         
dev是空的                                                       
sun4i_spi spi@1c68000: Invalid chip select 0:0 (err=-19) 

从parent->name及parent->drive->name都是乱码来看,有可能是parent这个指针不正确。或者,spi这个设备没创建好?

最近编辑记录 Gentlepig (2022-06-10 16:39:05)

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#1 2022-06-10 16:43:07

cube
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

(V3s/V3x/S3/S3L/R11通吃)小智V3x开发板smallwitpi lite u-boot/linux/buildroot测试
https://whycan.com/t_7248.html


不建议折腾uboot,他只是一个引导程序,浪费的时间不值得。

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楼主 #2 2022-06-10 17:27:49

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

感谢,正在下小智的uboot,打算对比下。

另,parent传过来的值是正确的,我打印parent->name及parent->driver->name时,不该在前边加&。

int device_find_first_child(const struct udevice *parent, struct udevice **devp)
{
	printf("parent:%d\r\n", parent);
	printf("parent name:%s\r\n", parent->name);
	printf("parent drive name:%s\r\n", parent->driver->name);
	if (list_empty(&parent->child_head)) {
		printf("dev是空的\r\n");
		*devp = NULL;
	} else {
		printf("dev不是空的\r\n");
		*devp = list_first_entry(&parent->child_head, struct udevice,
					 sibling_node);
	}

	return 0;
}
=> sf probe 0                                                   
parent:1138158968                                               
parent name:spi@1c68000                                         
parent drive name:sun4i_spi                                     
dev是空的                                                       
parent:1138158968                                               
parent name:spi@1c68000                                         
parent drive name:sun4i_spi                                     
dev是空的                                                       
sun4i_spi spi@1c68000: Invalid chip select 0:0 (err=-19) 

那么现在问题是为什么list_empty(&parent->child_head)这个函数返回0了。

static inline int list_empty(const struct list_head *head)
{
	return head->next == head;
}

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#3 2022-06-10 17:58:16

dtsayhi
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

uboot下SPI flash ID添加了没有 记得要搞这个不然匹配不上

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#4 2022-06-10 18:07:09

dtsayhi
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

Snipaste_2022-06-10_18-03-12.png

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楼主 #5 2022-06-11 13:57:54

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

默认有winbond的flash的。
我焊接的是w25q128,用sunxi-fel spiflash-info 查看到的是EF40。对得上。

#ifdef CONFIG_SPI_FLASH_WINBOND		/* WINBOND */
	/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
	{ INFO("w25p80", 0xef2014, 0x0,	64 * 1024,    16, 0) },
	{ INFO("w25p16", 0xef2015, 0x0,	64 * 1024,    32, 0) },
	{ INFO("w25p32", 0xef2016, 0x0,	64 * 1024,    64, 0) },
	{ INFO("w25x05", 0xef3010, 0, 64 * 1024,  1,  SECT_4K) },
	{ INFO("w25x40", 0xef3013, 0, 64 * 1024,  8,  SECT_4K) },
	{ INFO("w25x16", 0xef3015, 0, 64 * 1024,  32, SECT_4K) },
	{
		INFO("w25q16dw", 0xef6015, 0, 64 * 1024,  32,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{ INFO("w25x32", 0xef3016, 0, 64 * 1024,  64, SECT_4K) },
	{ INFO("w25q20cl", 0xef4012, 0, 64 * 1024,  4, SECT_4K) },
	{ INFO("w25q20bw", 0xef5012, 0, 64 * 1024,  4, SECT_4K) },
	{ INFO("w25q20ew", 0xef6012, 0, 64 * 1024,  4, SECT_4K) },
	{ INFO("w25q32", 0xef4016, 0, 64 * 1024,  64, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{
		INFO("w25q32dw", 0xef6016, 0, 64 * 1024,  64,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q32jv", 0xef7016, 0, 64 * 1024,  64,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q32jwm", 0xef8016, 0, 64 * 1024,  64,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{ INFO("w25x64", 0xef3017, 0, 64 * 1024, 128, SECT_4K) },
	{
		INFO("w25q64dw", 0xef6017, 0, 64 * 1024, 128,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q64jv", 0xef7017, 0, 64 * 1024, 128,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q128fw", 0xef6018, 0, 64 * 1024, 256,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q128jv", 0xef7018, 0, 64 * 1024, 256,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q128jw", 0xef8018, 0, 64 * 1024, 256,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q256fw", 0xef6019, 0, 64 * 1024, 512,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q256jw", 0xef7019, 0, 64 * 1024, 512,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{
		INFO("w25q01jv", 0xef4021, 0, 64 * 1024, 2048,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{ INFO("w25q80", 0xef5014, 0, 64 * 1024,  16, SECT_4K) },
	{ INFO("w25q80bl", 0xef4014, 0, 64 * 1024,  16, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("w25q16cl", 0xef4015, 0, 64 * 1024,  32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("w25q64cv", 0xef4017, 0, 64 * 1024,  128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("w25q128", 0xef4018, 0, 64 * 1024, 256,
			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
	},
	{ INFO("w25q256", 0xef4019, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("w25m512jw", 0xef6119, 0, 64 * 1024, 1024, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("w25m512jv", 0xef7119, 0, 64 * 1024, 1024, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
#endif
#ifdef CONFIG_SPI_FLASH_XMC
	/* XMC (Wuhan Xinxin Semiconductor Manufacturing Corp.) */
	{ INFO("XM25QH64A", 0x207017, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("XM25QH64C", 0x204017, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
	{ INFO("XM25QH128A", 0x207018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
#endif
#ifdef CONFIG_SPI_FLASH_XTX
	/* XTX Technology (Shenzhen) Limited */
	{ INFO("xt25f128b", 0x0b4018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
#endif
	{ },

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楼主 #6 2022-06-11 14:29:58

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

下载了小智的uboot2021.07,编译后进入uboot里输入sf probe 0,可以检测到设备。我一会再去比对下两个uboot。

SF: Detected w25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
=> 

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楼主 #7 2022-06-11 16:04:02

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

在小智uboot2021.07里的device_find_first_child( )函数里加上同样的打印函数,结果:

=> sf probe                                               
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
dev不是空的                                           
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
dev不是空的                                           
SF: Detected w25q128 with page size 256 Bytes, erase sizeB

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楼主 #9 2022-06-11 16:43:23

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

晕死了,尝试打印出来parent->child_head,parent->child_head.next,parent->child_head.prev。

int device_find_first_child(const struct udevice *parent, struct udevice **devp)
{
	printf("parent:%d\r\n", parent);
	printf("parent name:%s\r\n", parent->name);
	printf("parent drive name:%s\r\n", parent->driver->name);
	printf("parent child_head:%X\r\n", parent->child_head);
	printf("parent child_head next:%X\r\n", parent->child_head.next);
	printf("parent child_head prev:%X\r\n", parent->child_head.prev);
	if (list_empty(&parent->child_head)) {
		printf("dev是空的\r\n");
		*devp = NULL;
	} else {
		printf("dev不是空的\r\n");
		*devp = list_first_entry(&parent->child_head, struct udevice,
					 sibling_node);
	}

	return 0;
}
static inline int list_empty(const struct list_head *head)
{
    return head->next == head;
}
struct list_head {
    struct list_head *next, *prev;
};

小智uboot2021.07:

starting USB...                                           
No working controllers found                              
No ethernet found.                                        
No ethernet found.                                        
=> sf probe                                               
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
parent child_head:43D738EC                                
parent child_head next:43D738EC                           
parent child_head prev:43D738EC                           
dev是空的                                                 
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
parent child_head:43D738EC                                
parent child_head next:43D738EC                           
parent child_head prev:43D738EC                           
dev是空的                                                 
SF: Detected w25q128 with page size 256 Bytes, erase sizeB
=> sf probe 0                                             
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
parent child_head:43D7496C                                
parent child_head next:43D7496C                           
parent child_head prev:43D7496C                           
dev不是空的                                               
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
parent child_head:43D7496C                                
parent child_head next:43D7496C                           
parent child_head prev:43D7496C                           
dev不是空的                                               
SF: Detected w25q128 with page size 256 Bytes, erase sizeB
=> sf probe                                               
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
parent child_head:43D7496C                                
parent child_head next:43D7496C                           
parent child_head prev:43D7496C                           
dev不是空的                                               
parent:1138178232                                         
parent name:spi@1c68000                                   
parent drive name:sun4i_spi                               
parent child_head:43D7496C                                
parent child_head next:43D7496C                           
parent child_head prev:43D7496C                           
dev不是空的                                               
SF: Detected w25q128 with page size 256 Bytes, erase sizeB
=> 

我编译的uboot2022.07:

Net:   No ethernet found.
Hit any key to stop autoboot:  0 
=> sf probe
parent:1138158968
parent name:spi@1c68000
parent drive name:sun4i_spi
parent child_head:43D6EDAC
parent child_head next:43D6EDAC
parent child_head prev:43D6EDAC
dev是空的
parent:1138158968
parent name:spi@1c68000
parent drive name:sun4i_spi
parent child_head:43D6EDAC
parent child_head next:43D6EDAC
parent child_head prev:43D6EDAC
dev是空的
sun4i_spi spi@1c68000: Invalid chip select 0:0 (err=-19)
=> sf probe 0
parent:1138158968
parent name:spi@1c68000
parent drive name:sun4i_spi
parent child_head:43D6EDAC
parent child_head next:43D6EDAC
parent child_head prev:43D6EDAC
dev是空的
parent:1138158968
parent name:spi@1c68000
parent drive name:sun4i_spi
parent child_head:43D6EDAC
parent child_head next:43D6EDAC
parent child_head prev:43D6EDAC
dev是空的
sun4i_spi spi@1c68000: Invalid chip select 0:0 (err=-19)
=> 

几个疑问。
1是不是我打印parent->child_head.next方式不对?next是个指针变量。parent是指针,parent->child_head就是结构体对象了吧,其里面的next指针变量,应该是用child_head.next这种方式引用吧?
2对于小智uboot,我两次sf probe 0,打印出来的parent->child_head竟然不一样。
3对于小智uboot,两次打印出来的parent->child_head都和parent->child_head.next一样,但为何前一次是“dev是空的”,后边就是"dev不是空的"了?

最近编辑记录 Gentlepig (2022-06-11 17:05:11)

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楼主 #10 2022-06-13 11:55:12

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

我上个回复里是搞错了。
list_empty( )函数里传入的是parent->child_head的地址,所以应该是比较&parent->child_head和parent->child_head.next。
实际上确实是一样的。
继续查,发现uboot2021.07里面,第一次sf probe 0时,是打印"dev是空的",这句话,再次打印才是"dev不是空的"。那么就是第一次执行sf probe后是有其他操作的。
再查,在spi_get_bus_and_cs( )这个函数里,是判断ret = ENODEV错误时,会自动创建个设备的。有如下注释:

	/*
	 * If there is no such device, create one automatically. This means
	 * that we don't need a device tree node or platform data for the
	 * SPI flash chip - we will bind to the correct driver.
	 */

而uboot2022.07里是直接丢出个错误的。

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楼主 #11 2022-06-13 16:08:42

Gentlepig
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Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

有个_spi_get_bus_and_cs( )函数是和uboot2021.07里的spi_get_bus_and_cs( )一样,调用它的是spi_flash_probe( )函数,可惜声明是要废弃的。

/*
 * TODO(sjg@chromium.org): This is an old-style function. We should remove
 * it when all SPI flash drivers use dm
 */
struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
				  unsigned int max_hz, unsigned int spi_mode)
{
	struct spi_slave *slave;
	struct udevice *bus;
	char *str;

#if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USE_TINY_PRINTF)
	str = "spi_flash";
#else
	char name[30];

	snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
	str = strdup(name);
#endif

	if (_spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
				"jedec_spi_nor", str, &bus, &slave))
		return NULL;

	return dev_get_uclass_priv(slave->dev);
}

调用spi_get_bus_and_cs( )函数的是:

int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
			   struct udevice **devp)
{
	struct spi_slave *slave;
	struct udevice *bus;
	int ret;

	ret = spi_get_bus_and_cs(busnum, cs, &bus, &slave);
	if (ret)
		return ret;

	*devp = slave->dev;
	return 0;
}

再往上查,在do_spi_flash_probe( )函数里有:

...
	if (use_dt) {
		spi_flash_probe_bus_cs(bus, cs, &new);
		flash = dev_get_uclass_priv(new);
	} else {
		flash = spi_flash_probe(bus, cs, speed, mode);
	}
...

看样子,不用use_dt,就能使用旧的驱动函数。

最近编辑记录 Gentlepig (2022-06-13 16:11:17)

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楼主 #12 2022-06-14 10:48:18

Gentlepig
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注册时间: 2018-10-24
已发帖子: 795
积分: 712.5

Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

使用sf probe 0会使use_dt = 1;使用sf probe 0 100000,就是多个参数,speed或mode,就会使use_dt = 0。
那么我就尝试在uboot命令行里输入sf probe 0 100000,结果还是报错,报-2错误,

#define	ENOENT		 2	/* No such file or directory */

找到报错位置,是在device.c的device_probe( )函数里。

...
if (drv->probe) {
		ret = drv->probe(dev);
		printf("------------drv->probe result:%d\r\n", ret);
		if (ret)
			goto fail;
	}
...

这回不知道该怎么往下找了,既然drv-probe存在,但调用时却报错,我也不知道这个drv-probe指向了哪个函数。

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楼主 #13 2022-06-14 14:38:42

Gentlepig
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注册时间: 2018-10-24
已发帖子: 795
积分: 712.5

Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

在sun8i-v3s-licheepi-zero.dts里的spi上添加了这部分:

...
&spi0 {
	status = "okay";
	spidev@0x00{
		compatible = "spidev";
		spi-max-frequency = <10000000>;
		reg = <0>;
	};
};
...

编译后烧录到v3s上,进入uboot命令模式后,输入sf probe 0 10000,可以识别到spiflash。从打印的信息可以看到,是判断了bus上没有dev,然后新建了个dev。
此时再用sf probe 0命令,也可以检测到spi flash。

但是,如果v3s启动进入uboot命令模式后,先输入sf probe 0,则仍识别不了spi flash,和以前的报错一样。

那么,如何在spi总线上预设spi设备呢?我感觉我在设备树里上边的修改,就是在spi0总线上添加了个spidev啊,但是为何没起作用?

-------------------------------------------------

搜了spi-uclass.c这个文件,只有_spi_get_bus_and_cs( )这个函数调用了device_bind_driver( )。

最近编辑记录 Gentlepig (2022-06-14 15:12:36)

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楼主 #14 2022-06-17 08:56:31

Gentlepig
会员
注册时间: 2018-10-24
已发帖子: 795
积分: 712.5

Re: 请教,编译v3s的uboot2022,使用spi flash启动uboot,结果检测不到spi flash。

暂时总结下。
确实如1楼朋友所说,浪费时间不值得。目前改用uboot-v2022.04版本,可以认出spi flash。
在编译uboot-2022.07时,有个SPL_FLASH_SUNXI打不开,是在kconfig里定义的,仔细看了,依赖条件里没有V3S,自己加上去才行。

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