+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Moritz Fischer <moritz.fischer@ettus.com>
* IP from Cadence (ID T-CS-PE-0007-100, Version R1p10f2)
*
* This file is based on: drivers/i2c/zynq_i2c.c,
* with added driver-model support and code cleanup.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <dm.h>
#include <linux/types.h>
#include <linux/io.h>
#include <linux/errno.h>
-#include <dm/device.h>
#include <dm/root.h>
#include <i2c.h>
#include <fdtdec.h>
#include <mapmem.h>
#include <wait_bit.h>
-DECLARE_GLOBAL_DATA_PTR;
-
/* i2c register set */
struct cdns_i2c_regs {
u32 control;
return 0;
}
-/* Probe to see if a chip is present. */
-static int cdns_i2c_probe_chip(struct udevice *bus, uint chip_addr,
- uint chip_flags)
-{
- struct i2c_cdns_bus *i2c_bus = dev_get_priv(bus);
- struct cdns_i2c_regs *regs = i2c_bus->regs;
-
- /* Attempt to read a byte */
- setbits_le32(®s->control, CDNS_I2C_CONTROL_CLR_FIFO |
- CDNS_I2C_CONTROL_RW);
- clrbits_le32(®s->control, CDNS_I2C_CONTROL_HOLD);
- writel(0xFF, ®s->interrupt_status);
- writel(chip_addr, ®s->address);
- writel(1, ®s->transfer_size);
-
- return (cdns_i2c_wait(regs, CDNS_I2C_INTERRUPT_COMP |
- CDNS_I2C_INTERRUPT_NACK) &
- CDNS_I2C_INTERRUPT_COMP) ? 0 : -ETIMEDOUT;
-}
-
static int cdns_i2c_write_data(struct i2c_cdns_bus *i2c_bus, u32 addr, u8 *data,
u32 len)
{
struct cdns_i2c_platform_data *pdata =
(struct cdns_i2c_platform_data *)dev_get_driver_data(dev);
- i2c_bus->regs = (struct cdns_i2c_regs *)dev_get_addr(dev);
+ i2c_bus->regs = (struct cdns_i2c_regs *)devfdt_get_addr(dev);
if (!i2c_bus->regs)
return -ENOMEM;
static const struct dm_i2c_ops cdns_i2c_ops = {
.xfer = cdns_i2c_xfer,
- .probe_chip = cdns_i2c_probe_chip,
.set_bus_speed = cdns_i2c_set_bus_speed,
};