40cd67eee6
Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/****************************************************************************
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* boards/arm/samv7/same70-xplained/src/sam_at24config.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/mtd/configdata.h>
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#include <nuttx/mtd/mtd.h>
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#include <nuttx/fs/ioctl.h>
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#include "sam_twihs.h"
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#include "same70-xplained.h"
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#ifdef HAVE_MTDCONFIG
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_at24config
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*
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* Description:
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* Create an AT24xx-based MTD configuration device for storage device
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* configuration information.
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*
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****************************************************************************/
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int sam_at24config(void)
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{
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struct i2c_master_s *i2c;
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struct mtd_dev_s *at24;
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int ret;
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/* Get an instance of the TWI0 interface */
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i2c = sam_i2cbus_initialize(0);
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if (!i2c)
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{
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ferr("ERROR: Failed to initialize TWI0\n");
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return -ENODEV;
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}
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/* Initialize the AT24 driver */
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at24 = at24c_initialize(i2c);
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if (!at24)
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{
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ferr("ERROR: Failed to initialize the AT24 driver\n");
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sam_i2cbus_uninitialize(i2c);
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return -ENODEV;
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}
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/* Make sure that the AT24 is in normal memory access mode */
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ret = at24->ioctl(at24, MTDIOC_EXTENDED, 0);
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if (ret < 0)
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{
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ferr("ERROR: AT24 ioctl(MTDIOC_EXTENDED) failed: %d\n", ret);
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}
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/* Bind the instance of an MTD device to the /dev/config device. */
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ret = mtdconfig_register(at24);
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if (ret < 0)
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{
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ferr("ERROR: Failed to bind AT24 driver to the MTD config device\n");
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sam_i2cbus_uninitialize(i2c);
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}
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return ret;
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}
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#endif /* HAVE_MTDCONFIG */
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