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749396cb29
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230714174955.4064174-1-robh@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
161 lines
4.1 KiB
C
161 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Freescale SPI/eSPI controller driver library.
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*
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* Maintainer: Kumar Gala
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*
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* Copyright (C) 2006 Polycom, Inc.
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*
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* CPM SPI and QE buffer descriptors mode support:
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* Copyright (c) 2009 MontaVista Software, Inc.
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* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* Copyright 2010 Freescale Semiconductor, Inc.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/fsl_devices.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#ifdef CONFIG_FSL_SOC
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#include <sysdev/fsl_soc.h>
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#endif
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#include "spi-fsl-lib.h"
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#define MPC8XXX_SPI_RX_BUF(type) \
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void mpc8xxx_spi_rx_buf_##type(u32 data, struct mpc8xxx_spi *mpc8xxx_spi) \
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{ \
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type *rx = mpc8xxx_spi->rx; \
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*rx++ = (type)(data >> mpc8xxx_spi->rx_shift); \
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mpc8xxx_spi->rx = rx; \
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} \
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_rx_buf_##type);
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#define MPC8XXX_SPI_TX_BUF(type) \
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u32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi) \
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{ \
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u32 data; \
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const type *tx = mpc8xxx_spi->tx; \
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if (!tx) \
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return 0; \
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data = *tx++ << mpc8xxx_spi->tx_shift; \
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mpc8xxx_spi->tx = tx; \
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return data; \
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} \
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_tx_buf_##type);
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MPC8XXX_SPI_RX_BUF(u8)
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MPC8XXX_SPI_RX_BUF(u16)
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MPC8XXX_SPI_RX_BUF(u32)
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MPC8XXX_SPI_TX_BUF(u8)
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MPC8XXX_SPI_TX_BUF(u16)
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MPC8XXX_SPI_TX_BUF(u32)
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struct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata)
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{
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return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata);
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}
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EXPORT_SYMBOL_GPL(to_of_pinfo);
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const char *mpc8xxx_spi_strmode(unsigned int flags)
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{
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if (flags & SPI_QE_CPU_MODE) {
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return "QE CPU";
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} else if (flags & SPI_CPM_MODE) {
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if (flags & SPI_QE)
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return "QE";
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else if (flags & SPI_CPM2)
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return "CPM2";
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else
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return "CPM1";
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}
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return "CPU";
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}
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_strmode);
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void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
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unsigned int irq)
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{
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struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
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struct spi_master *master;
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struct mpc8xxx_spi *mpc8xxx_spi;
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master = dev_get_drvdata(dev);
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/* the spi->mode bits understood by this driver: */
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master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH
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| SPI_LSB_FIRST | SPI_LOOP;
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master->dev.of_node = dev->of_node;
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mpc8xxx_spi = spi_master_get_devdata(master);
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mpc8xxx_spi->dev = dev;
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mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8;
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mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8;
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mpc8xxx_spi->flags = pdata->flags;
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mpc8xxx_spi->spibrg = pdata->sysclk;
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mpc8xxx_spi->irq = irq;
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mpc8xxx_spi->rx_shift = 0;
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mpc8xxx_spi->tx_shift = 0;
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master->bus_num = pdata->bus_num;
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master->num_chipselect = pdata->max_chipselect;
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init_completion(&mpc8xxx_spi->done);
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}
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_probe);
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int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
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{
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struct device *dev = &ofdev->dev;
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struct device_node *np = ofdev->dev.of_node;
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struct mpc8xxx_spi_probe_info *pinfo;
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struct fsl_spi_platform_data *pdata;
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const void *prop;
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int ret = -ENOMEM;
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pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL);
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if (!pinfo)
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return ret;
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pdata = &pinfo->pdata;
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dev->platform_data = pdata;
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/* Allocate bus num dynamically. */
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pdata->bus_num = -1;
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#ifdef CONFIG_FSL_SOC
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/* SPI controller is either clocked from QE or SoC clock. */
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pdata->sysclk = get_brgfreq();
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if (pdata->sysclk == -1) {
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pdata->sysclk = fsl_get_sys_freq();
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if (pdata->sysclk == -1)
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return -ENODEV;
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}
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#else
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ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk);
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if (ret)
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return ret;
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#endif
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prop = of_get_property(np, "mode", NULL);
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if (prop && !strcmp(prop, "cpu-qe"))
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pdata->flags = SPI_QE_CPU_MODE;
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else if (prop && !strcmp(prop, "qe"))
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pdata->flags = SPI_CPM_MODE | SPI_QE;
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else if (of_device_is_compatible(np, "fsl,cpm2-spi"))
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pdata->flags = SPI_CPM_MODE | SPI_CPM2;
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else if (of_device_is_compatible(np, "fsl,cpm1-spi"))
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pdata->flags = SPI_CPM_MODE | SPI_CPM1;
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return 0;
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}
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EXPORT_SYMBOL_GPL(of_mpc8xxx_spi_probe);
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MODULE_LICENSE("GPL");
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