[PATCH 01/20] mtd: pxa3xx_nand: refuse the flash definition get from platform

Marc Kleine-Budde mkl at pengutronix.de
Fri May 14 07:09:00 EDT 2010


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Hello Haojian,

Haojian Zhuang wrote:
>>From 16057e690aa4a2fd8a9c07c70ab48ffc2f76204f Mon Sep 17 00:00:00 2001
> From: Lei Wen <leiwen at marvell.com>
> Date: Sat, 20 Mar 2010 19:01:23 +0800
> Subject: [PATCH] mtd: pxa3xx_nand: refuse the flash definition get from platform
> 
> For current usage, it is little reason to use a platform defined flash info
> for the flash detection. Flash timing through platform should be the same.
> And allow multiple platform to define the same flash chip would be a waste.
> 
> Also condense the flash definition way in the c file to simplify adding a
> new chip.
> 
> Signed-off-by: Lei Wen <leiwen at marvell.com>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>

NACK, see inline

> ---
>  arch/arm/plat-pxa/include/plat/pxa3xx_nand.h |   40 ----
>  drivers/mtd/nand/Kconfig                     |    7 -
>  drivers/mtd/nand/pxa3xx_nand.c               |  262 ++++++--------------------
>  3 files changed, 60 insertions(+), 249 deletions(-)
> 
> diff --git a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
> b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
> index 3478eae..c494f68 100644
> --- a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
> +++ b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
> @@ -4,43 +4,6 @@
>  #include <linux/mtd/mtd.h>
>  #include <linux/mtd/partitions.h>
> 
> -struct pxa3xx_nand_timing {
> -	unsigned int	tCH;  /* Enable signal hold time */
> -	unsigned int	tCS;  /* Enable signal setup time */
> -	unsigned int	tWH;  /* ND_nWE high duration */
> -	unsigned int	tWP;  /* ND_nWE pulse time */
> -	unsigned int	tRH;  /* ND_nRE high duration */
> -	unsigned int	tRP;  /* ND_nRE pulse width */
> -	unsigned int	tR;   /* ND_nWE high to ND_nRE low for read */
> -	unsigned int	tWHR; /* ND_nWE high to ND_nRE low for status read */
> -	unsigned int	tAR;  /* ND_ALE low to ND_nRE low delay */
> -};
> -
> -struct pxa3xx_nand_cmdset {
> -	uint16_t	read1;
> -	uint16_t	read2;
> -	uint16_t	program;
> -	uint16_t	read_status;
> -	uint16_t	read_id;
> -	uint16_t	erase;
> -	uint16_t	reset;
> -	uint16_t	lock;
> -	uint16_t	unlock;
> -	uint16_t	lock_status;
> -};
> -
> -struct pxa3xx_nand_flash {
> -	const struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
> -	const struct pxa3xx_nand_cmdset *cmdset;
> -
> -	uint32_t page_per_block;/* Pages per block (PG_PER_BLK) */
> -	uint32_t page_size;	/* Page size in bytes (PAGE_SZ) */
> -	uint32_t flash_width;	/* Width of Flash memory (DWIDTH_M) */
> -	uint32_t dfc_width;	/* Width of flash controller(DWIDTH_C) */
> -	uint32_t num_blocks;	/* Number of physical blocks in Flash */
> -	uint32_t chip_id;
> -};
> -
>  struct pxa3xx_nand_platform_data {
> 
>  	/* the data flash bus is shared between the Static Memory
> @@ -54,9 +17,6 @@ struct pxa3xx_nand_platform_data {
> 
>  	const struct mtd_partition		*parts;
>  	unsigned int				nr_parts;
> -
> -	const struct pxa3xx_nand_flash * 	flash;
> -	size_t					num_flash;
>  };
> 
>  extern void pxa3xx_set_nand_info(struct pxa3xx_nand_platform_data *info);
> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> index 98a04b3..9a35d92 100644
> --- a/drivers/mtd/nand/Kconfig
> +++ b/drivers/mtd/nand/Kconfig
> @@ -399,13 +399,6 @@ config MTD_NAND_PXA3xx
>  	  This enables the driver for the NAND flash device found on
>  	  PXA3xx processors
> 
> -config MTD_NAND_PXA3xx_BUILTIN
> -	bool "Use builtin definitions for some NAND chips (deprecated)"
> -	depends on MTD_NAND_PXA3xx
> -	help
> -	  This enables builtin definitions for some NAND chips. This
> -	  is deprecated in favor of platform specific data.
> -
>  config MTD_NAND_CM_X270
>  	tristate "Support for NAND Flash on CM-X270 modules"
>  	depends on MTD_NAND && MACH_ARMCORE
> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
> index e02fa4f..da40b9a 100644
> --- a/drivers/mtd/nand/pxa3xx_nand.c
> +++ b/drivers/mtd/nand/pxa3xx_nand.c
> @@ -113,6 +113,41 @@ enum {
>  	STATE_PIO_WRITING,
>  };
> 
> +struct pxa3xx_nand_timing {
> +	uint32_t	tCH;  /* Enable signal hold time */
> +	uint32_t	tCS;  /* Enable signal setup time */
> +	uint32_t	tWH;  /* ND_nWE high duration */
> +	uint32_t	tWP;  /* ND_nWE pulse time */
> +	uint32_t	tRH;  /* ND_nRE high duration */
> +	uint32_t	tRP;  /* ND_nRE pulse width */
> +	uint32_t	tAR;  /* ND_ALE low to ND_nRE low delay */
> +	uint32_t	tWHR; /* ND_nWE high to ND_nRE low for status read */
> +	uint32_t	tR;   /* ND_nWE high to ND_nRE low for read */
> +};
> +
> +struct pxa3xx_nand_cmdset {
> +	uint16_t	read1;
> +	uint16_t	read2;
> +	uint16_t	program;
> +	uint16_t	read_status;
> +	uint16_t	read_id;
> +	uint16_t	erase;
> +	uint16_t	reset;
> +	uint16_t	lock;
> +	uint16_t	unlock;
> +	uint16_t	lock_status;
> +};
> +
> +struct pxa3xx_nand_flash {
> +	uint32_t	chip_id;
> +	uint16_t	page_per_block; /* Pages per block (PG_PER_BLK) */
> +	uint16_t 	page_size;	/* Page size in bytes (PAGE_SZ) */
> +	uint8_t		flash_width;	/* Width of Flash memory (DWIDTH_M) */
> +	uint8_t 	dfc_width;	/* Width of flash controller(DWIDTH_C) */
> +	uint32_t	num_blocks;	/* Number of physical blocks in Flash */
> +	struct pxa3xx_nand_timing timing;	/* NAND Flash timing */
> +};
> +
>  struct pxa3xx_nand_info {
>  	struct nand_chip	nand_chip;
> 
> @@ -177,20 +212,7 @@ MODULE_PARM_DESC(use_dma, "enable DMA for data
> transfering to/from NAND HW");
>  static struct pxa3xx_nand_timing default_timing;
>  static struct pxa3xx_nand_flash default_flash;
> 
> -static struct pxa3xx_nand_cmdset smallpage_cmdset = {
> -	.read1		= 0x0000,
> -	.read2		= 0x0050,
> -	.program	= 0x1080,
> -	.read_status	= 0x0070,
> -	.read_id	= 0x0090,
> -	.erase		= 0xD060,
> -	.reset		= 0x00FF,
> -	.lock		= 0x002A,
> -	.unlock		= 0x2423,
> -	.lock_status	= 0x007A,
> -};
> -
> -static struct pxa3xx_nand_cmdset largepage_cmdset = {
> +const static struct pxa3xx_nand_cmdset cmdset = {
>  	.read1		= 0x3000,
>  	.read2		= 0x0050,
>  	.program	= 0x1080,
> @@ -203,143 +225,17 @@ static struct pxa3xx_nand_cmdset largepage_cmdset = {
>  	.lock_status	= 0x007A,
>  };
> 
> -#ifdef CONFIG_MTD_NAND_PXA3xx_BUILTIN
> -static struct pxa3xx_nand_timing samsung512MbX16_timing = {
> -	.tCH	= 10,
> -	.tCS	= 0,
> -	.tWH	= 20,
> -	.tWP	= 40,
> -	.tRH	= 30,
> -	.tRP	= 40,
> -	.tR	= 11123,
> -	.tWHR	= 110,
> -	.tAR	= 10,
> -};
> -
> -static struct pxa3xx_nand_flash samsung512MbX16 = {
> -	.timing		= &samsung512MbX16_timing,
> -	.cmdset		= &smallpage_cmdset,
> -	.page_per_block	= 32,
> -	.page_size	= 512,
> -	.flash_width	= 16,
> -	.dfc_width	= 16,
> -	.num_blocks	= 4096,
> -	.chip_id	= 0x46ec,
> -};
> -
> -static struct pxa3xx_nand_flash samsung2GbX8 = {
> -	.timing		= &samsung512MbX16_timing,
> -	.cmdset		= &smallpage_cmdset,
> -	.page_per_block	= 64,
> -	.page_size	= 2048,
> -	.flash_width	= 8,
> -	.dfc_width	= 8,
> -	.num_blocks	= 2048,
> -	.chip_id	= 0xdaec,
> -};
> -
> -static struct pxa3xx_nand_flash samsung32GbX8 = {
> -	.timing		= &samsung512MbX16_timing,
> -	.cmdset		= &smallpage_cmdset,
> -	.page_per_block	= 128,
> -	.page_size	= 4096,
> -	.flash_width	= 8,
> -	.dfc_width	= 8,
> -	.num_blocks	= 8192,
> -	.chip_id	= 0xd7ec,
> +static struct pxa3xx_nand_flash __devinitdata builtin_flash_types[] = {
> +{ 0x46ec, 32, 512, 16, 16, 4096, { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, },
> +{ 0xdaec, 64, 2048, 8, 8, 2048, { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, },
> +{ 0xd7ec, 128, 4096, 8, 8, 8192, { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, },
> +{ 0xa12c, 64, 2048, 8, 8, 1024, { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, },
> +{ 0xb12c, 64, 2048, 16, 16, 1024, { 10, 25, 15, 25, 15, 30, 25000,
> 60, 10, }, },
> +{ 0xdc2c, 64, 2048, 8, 8, 4096, { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, },
> +{ 0xcc2c, 64, 2048, 16, 16, 4096, { 10, 25, 15, 25, 15, 30, 25000,
> 60, 10, }, },
> +{ 0xba20, 64, 2048, 16, 16, 2048, { 10, 35, 15, 25, 15, 25, 25000,
> 60, 10, }, },
>  };
> 
> -static struct pxa3xx_nand_timing micron_timing = {
> -	.tCH	= 10,
> -	.tCS	= 25,
> -	.tWH	= 15,
> -	.tWP	= 25,
> -	.tRH	= 15,
> -	.tRP	= 30,
> -	.tR	= 25000,
> -	.tWHR	= 60,
> -	.tAR	= 10,
> -};
> -
> -static struct pxa3xx_nand_flash micron1GbX8 = {
> -	.timing		= &micron_timing,
> -	.cmdset		= &largepage_cmdset,
> -	.page_per_block	= 64,
> -	.page_size	= 2048,
> -	.flash_width	= 8,
> -	.dfc_width	= 8,
> -	.num_blocks	= 1024,
> -	.chip_id	= 0xa12c,
> -};
> -
> -static struct pxa3xx_nand_flash micron1GbX16 = {
> -	.timing		= &micron_timing,
> -	.cmdset		= &largepage_cmdset,
> -	.page_per_block	= 64,
> -	.page_size	= 2048,
> -	.flash_width	= 16,
> -	.dfc_width	= 16,
> -	.num_blocks	= 1024,
> -	.chip_id	= 0xb12c,
> -};
> -
> -static struct pxa3xx_nand_flash micron4GbX8 = {
> -	.timing		= &micron_timing,
> -	.cmdset		= &largepage_cmdset,
> -	.page_per_block	= 64,
> -	.page_size	= 2048,
> -	.flash_width	= 8,
> -	.dfc_width	= 8,
> -	.num_blocks	= 4096,
> -	.chip_id	= 0xdc2c,
> -};
> -
> -static struct pxa3xx_nand_flash micron4GbX16 = {
> -	.timing		= &micron_timing,
> -	.cmdset		= &largepage_cmdset,
> -	.page_per_block	= 64,
> -	.page_size	= 2048,
> -	.flash_width	= 16,
> -	.dfc_width	= 16,
> -	.num_blocks	= 4096,
> -	.chip_id	= 0xcc2c,
> -};
> -
> -static struct pxa3xx_nand_timing stm2GbX16_timing = {
> -	.tCH = 10,
> -	.tCS = 35,
> -	.tWH = 15,
> -	.tWP = 25,
> -	.tRH = 15,
> -	.tRP = 25,
> -	.tR = 25000,
> -	.tWHR = 60,
> -	.tAR = 10,
> -};
> -
> -static struct pxa3xx_nand_flash stm2GbX16 = {
> -	.timing = &stm2GbX16_timing,
> -	.cmdset	= &largepage_cmdset,
> -	.page_per_block = 64,
> -	.page_size = 2048,
> -	.flash_width = 16,
> -	.dfc_width = 16,
> -	.num_blocks = 2048,
> -	.chip_id = 0xba20,
> -};
> -
> -static struct pxa3xx_nand_flash *builtin_flash_types[] = {
> -	&samsung512MbX16,
> -	&samsung2GbX8,
> -	&samsung32GbX8,
> -	&micron1GbX8,
> -	&micron1GbX16,
> -	&micron4GbX8,
> -	&micron4GbX16,
> -	&stm2GbX16,
> -};
> -#endif /* CONFIG_MTD_NAND_PXA3xx_BUILTIN */
> -
>  #define NDTR0_tCH(c)	(min((c), 7) << 19)
>  #define NDTR0_tCS(c)	(min((c), 7) << 16)
>  #define NDTR0_tWH(c)	(min((c), 7) << 11)
> @@ -412,7 +308,6 @@ static int prepare_read_prog_cmd(struct
> pxa3xx_nand_info *info,
>  			uint16_t cmd, int column, int page_addr)
>  {
>  	const struct pxa3xx_nand_flash *f = info->flash_info;
> -	const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
> 
>  	/* calculate data size */
>  	switch (f->page_size) {
> @@ -445,7 +340,7 @@ static int prepare_read_prog_cmd(struct
> pxa3xx_nand_info *info,
>  		 */
>  		info->ndcb1 = page_addr << 8;
> 
> -	if (cmd == cmdset->program)
> +	if (cmd == cmdset.program)
>  		info->ndcb0 |= NDCB0_CMD_TYPE(1) | NDCB0_AUTO_RS;
> 
>  	return 0;
> @@ -463,20 +358,18 @@ static int prepare_erase_cmd(struct
> pxa3xx_nand_info *info,
> 
>  static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd)
>  {
> -	const struct pxa3xx_nand_cmdset *cmdset = info->flash_info->cmdset;
> -
>  	info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0);
>  	info->ndcb1 = 0;
>  	info->ndcb2 = 0;
> 
> -	if (cmd == cmdset->read_id) {
> +	if (cmd == cmdset.read_id) {
>  		info->ndcb0 |= NDCB0_CMD_TYPE(3);
>  		info->data_size = 8;
> -	} else if (cmd == cmdset->read_status) {
> +	} else if (cmd == cmdset.read_status) {
>  		info->ndcb0 |= NDCB0_CMD_TYPE(4);
>  		info->data_size = 8;
> -	} else if (cmd == cmdset->reset || cmd == cmdset->lock ||
> -		   cmd == cmdset->unlock) {
> +	} else if (cmd == cmdset.reset || cmd == cmdset.lock ||
> +		   cmd == cmdset.unlock) {
>  		info->ndcb0 |= NDCB0_CMD_TYPE(5);
>  	} else
>  		return -EINVAL;
> @@ -700,8 +593,6 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
> *mtd, unsigned command,
>  				int column, int page_addr)
>  {
>  	struct pxa3xx_nand_info *info = mtd->priv;
> -	const struct pxa3xx_nand_flash *flash_info = info->flash_info;
> -	const struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset;
>  	int ret;
> 
>  	info->use_dma = (use_dma) ? 1 : 0;
> @@ -718,7 +609,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
> *mtd, unsigned command,
>  		info->buf_start = mtd->writesize + column;
>  		memset(info->data_buff, 0xFF, info->buf_count);
> 
> -		if (prepare_read_prog_cmd(info, cmdset->read1, column, page_addr))
> +		if (prepare_read_prog_cmd(info, cmdset.read1, column, page_addr))
>  			break;
> 
>  		pxa3xx_nand_do_cmd(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR);
> @@ -735,7 +626,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
> *mtd, unsigned command,
>  		info->buf_count = mtd->writesize + mtd->oobsize;
>  		memset(info->data_buff, 0xFF, info->buf_count);
> 
> -		if (prepare_read_prog_cmd(info, cmdset->read1, column, page_addr))
> +		if (prepare_read_prog_cmd(info, cmdset.read1, column, page_addr))
>  			break;
> 
>  		pxa3xx_nand_do_cmd(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR);
> @@ -761,14 +652,14 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
> *mtd, unsigned command,
>  	case NAND_CMD_PAGEPROG:
>  		info->use_ecc = (info->seqin_column >= mtd->writesize) ? 0 : 1;
> 
> -		if (prepare_read_prog_cmd(info, cmdset->program,
> +		if (prepare_read_prog_cmd(info, cmdset.program,
>  				info->seqin_column, info->seqin_page_addr))
>  			break;
> 
>  		pxa3xx_nand_do_cmd(info, NDSR_WRDREQ);
>  		break;
>  	case NAND_CMD_ERASE1:
> -		if (prepare_erase_cmd(info, cmdset->erase, page_addr))
> +		if (prepare_erase_cmd(info, cmdset.erase, page_addr))
>  			break;
> 
>  		pxa3xx_nand_do_cmd(info, NDSR_CS0_BBD | NDSR_CS0_CMDD);
> @@ -783,13 +674,13 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
> *mtd, unsigned command,
>  				info->read_id_bytes : 1;
> 
>  		if (prepare_other_cmd(info, (command == NAND_CMD_READID) ?
> -				cmdset->read_id : cmdset->read_status))
> +				cmdset.read_id : cmdset.read_status))
>  			break;
> 
>  		pxa3xx_nand_do_cmd(info, NDSR_RDDREQ);
>  		break;
>  	case NAND_CMD_RESET:
> -		if (prepare_other_cmd(info, cmdset->reset))
> +		if (prepare_other_cmd(info, cmdset.reset))
>  			break;
> 
>  		ret = pxa3xx_nand_do_cmd(info, NDSR_CS0_CMDD);
> @@ -925,12 +816,10 @@ static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd,
> 
>  static int __readid(struct pxa3xx_nand_info *info, uint32_t *id)
>  {
> -	const struct pxa3xx_nand_flash *f = info->flash_info;
> -	const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
>  	uint32_t ndcr;
>  	uint8_t  id_buff[8];
> 
> -	if (prepare_other_cmd(info, cmdset->read_id)) {
> +	if (prepare_other_cmd(info, cmdset.read_id)) {
>  		printk(KERN_ERR "failed to prepare command\n");
>  		return -EINVAL;
>  	}
> @@ -991,7 +880,7 @@ static int pxa3xx_nand_config_flash(struct
> pxa3xx_nand_info *info,
> 
>  	info->reg_ndcr = ndcr;
> 
> -	pxa3xx_nand_set_timing(info, f->timing);
> +	pxa3xx_nand_set_timing(info, &f->timing);
>  	info->flash_info = f;
>  	return 0;
>  }
> @@ -1027,11 +916,6 @@ static int pxa3xx_nand_detect_config(struct
> pxa3xx_nand_info *info)
>  	default_flash.flash_width = ndcr & NDCR_DWIDTH_M ? 16 : 8;
>  	default_flash.dfc_width = ndcr & NDCR_DWIDTH_C ? 16 : 8;
> 
> -	if (default_flash.page_size == 2048)
> -		default_flash.cmdset = &largepage_cmdset;
> -	else
> -		default_flash.cmdset = &smallpage_cmdset;
> -
>  	/* set info fields needed to __readid */
>  	info->flash_info = &default_flash;
>  	info->read_id_bytes = (default_flash.page_size == 2048) ? 4 : 2;
> @@ -1067,7 +951,7 @@ static int pxa3xx_nand_detect_config(struct
> pxa3xx_nand_info *info)
>  		info->row_addr_cycles = 2;
> 
>  	pxa3xx_nand_detect_timing(info, &default_timing);
> -	default_flash.timing = &default_timing;
> +	memcpy(&default_flash.timing, &default_timing, sizeof(default_timing));
> 
>  	return 0;
>  }
> @@ -1083,23 +967,9 @@ static int pxa3xx_nand_detect_flash(struct
> pxa3xx_nand_info *info,
>  		if (pxa3xx_nand_detect_config(info) == 0)
>  			return 0;
> 
> -	for (i = 0; i<pdata->num_flash; ++i) {
> -		f = pdata->flash + i;
> -
> -		if (pxa3xx_nand_config_flash(info, f))
> -			continue;
> -
> -		if (__readid(info, &id))
> -			continue;
> -
> -		if (id == f->chip_id)
> -			return 0;
> -	}
> -
> -#ifdef CONFIG_MTD_NAND_PXA3xx_BUILTIN
>  	for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) {
> 
> -		f = builtin_flash_types[i];
> +		f = &builtin_flash_types[i];
> 
>  		if (pxa3xx_nand_config_flash(info, f))
>  			continue;
> @@ -1110,7 +980,6 @@ static int pxa3xx_nand_detect_flash(struct
> pxa3xx_nand_info *info,
>  		if (id == f->chip_id)
>  			return 0;
>  	}
> -#endif
> 
>  	dev_warn(&info->pdev->dev,
>  		 "failed to detect configured nand flash; found %04x instead of\n",
> @@ -1320,17 +1189,6 @@ static int pxa3xx_nand_probe(struct
> platform_device *pdev)
>  		goto fail_free_irq;
>  	}
> 
> -	if (mtd_has_cmdlinepart()) {
> -		static const char *probes[] = { "cmdlinepart", NULL };
> -		struct mtd_partition *parts;
> -		int nr_parts;
> -
> -		nr_parts = parse_mtd_partitions(mtd, probes, &parts, 0);
> -
> -		if (nr_parts)
> -			return add_mtd_partitions(mtd, parts, nr_parts);
> -	}
> -

Why are you removing this? It already works, has the same functionality
as your patch 17 and works without ugly defines.

Please don't remove this and drop your patch 17

>  	return add_mtd_partitions(mtd, pdata->parts, pdata->nr_parts);
> 
>  fail_free_irq:

cheers Marc

- --
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |
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