mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2011
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* Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
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*/
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#include <common.h>
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#include <i2c.h>
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#include <asm/io.h>
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#include <linux/ctype.h>
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#include "../common/common.h"
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static void i2c_write_start_seq(void)
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{
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struct fsl_i2c_base *base;
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base = (struct fsl_i2c_base *)(CONFIG_SYS_IMMR +
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CONFIG_SYS_I2C_OFFSET);
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udelay(DELAY_ABORT_SEQ);
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out_8(&base->cr, (I2C_CR_MEN | I2C_CR_MSTA));
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udelay(DELAY_ABORT_SEQ);
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out_8(&base->cr, (I2C_CR_MEN));
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}
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int i2c_make_abort(void)
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{
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struct fsl_i2c_base *base;
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base = (struct fsl_i2c_base *)(CONFIG_SYS_IMMR +
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CONFIG_SYS_I2C_OFFSET);
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uchar last;
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int nbr_read = 0;
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int i = 0;
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int ret = 0;
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/* wait after each operation to finsh with a delay */
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out_8(&base->cr, (I2C_CR_MSTA));
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udelay(DELAY_ABORT_SEQ);
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out_8(&base->cr, (I2C_CR_MEN | I2C_CR_MSTA));
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udelay(DELAY_ABORT_SEQ);
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in_8(&base->dr);
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udelay(DELAY_ABORT_SEQ);
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last = in_8(&base->dr);
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nbr_read++;
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/*
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* do read until the last bit is 1, but stop if the full eeprom is
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* read.
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*/
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while (((last & 0x01) != 0x01) &&
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(nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) {
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udelay(DELAY_ABORT_SEQ);
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last = in_8(&base->dr);
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nbr_read++;
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}
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if ((last & 0x01) != 0x01)
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ret = -2;
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if ((last != 0xff) || (nbr_read > 1))
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printf("[INFO] i2c abort after %d bytes (0x%02x)\n",
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nbr_read, last);
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udelay(DELAY_ABORT_SEQ);
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out_8(&base->cr, (I2C_CR_MEN));
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udelay(DELAY_ABORT_SEQ);
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/* clear status reg */
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out_8(&base->sr, 0);
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for (i = 0; i < 5; i++)
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i2c_write_start_seq();
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if (ret != 0)
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printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n",
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nbr_read, last);
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return ret;
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}
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