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path: root/drivers/spi/spi-fsl-lib.c
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Diffstat (limited to 'drivers/spi/spi-fsl-lib.c')
-rw-r--r--drivers/spi/spi-fsl-lib.c146
1 files changed, 32 insertions, 114 deletions
diff --git a/drivers/spi/spi-fsl-lib.c b/drivers/spi/spi-fsl-lib.c
index e947f2d1b2f5..bb7a625db5b0 100644
--- a/drivers/spi/spi-fsl-lib.c
+++ b/drivers/spi/spi-fsl-lib.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Freescale SPI/eSPI controller driver library.
*
@@ -10,18 +11,15 @@
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
* Copyright 2010 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
*/
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/fsl_devices.h>
#include <linux/dma-mapping.h>
+#include <linux/fsl_devices.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
#include <linux/mm.h>
-#include <linux/of_platform.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#ifdef CONFIG_FSL_SOC
#include <sysdev/fsl_soc.h>
@@ -35,7 +33,8 @@ void mpc8xxx_spi_rx_buf_##type(u32 data, struct mpc8xxx_spi *mpc8xxx_spi) \
type *rx = mpc8xxx_spi->rx; \
*rx++ = (type)(data >> mpc8xxx_spi->rx_shift); \
mpc8xxx_spi->rx = rx; \
-}
+} \
+EXPORT_SYMBOL_GPL(mpc8xxx_spi_rx_buf_##type);
#define MPC8XXX_SPI_TX_BUF(type) \
u32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi) \
@@ -47,7 +46,8 @@ u32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi) \
data = *tx++ << mpc8xxx_spi->tx_shift; \
mpc8xxx_spi->tx = tx; \
return data; \
-}
+} \
+EXPORT_SYMBOL_GPL(mpc8xxx_spi_tx_buf_##type);
MPC8XXX_SPI_RX_BUF(u8)
MPC8XXX_SPI_RX_BUF(u16)
@@ -60,49 +60,7 @@ struct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata)
{
return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata);
}
-
-static void mpc8xxx_spi_work(struct work_struct *work)
-{
- struct mpc8xxx_spi *mpc8xxx_spi = container_of(work, struct mpc8xxx_spi,
- work);
-
- spin_lock_irq(&mpc8xxx_spi->lock);
- while (!list_empty(&mpc8xxx_spi->queue)) {
- struct spi_message *m = container_of(mpc8xxx_spi->queue.next,
- struct spi_message, queue);
-
- list_del_init(&m->queue);
- spin_unlock_irq(&mpc8xxx_spi->lock);
-
- if (mpc8xxx_spi->spi_do_one_msg)
- mpc8xxx_spi->spi_do_one_msg(m);
-
- spin_lock_irq(&mpc8xxx_spi->lock);
- }
- spin_unlock_irq(&mpc8xxx_spi->lock);
-}
-
-int mpc8xxx_spi_transfer(struct spi_device *spi,
- struct spi_message *m)
-{
- struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
- unsigned long flags;
-
- m->actual_length = 0;
- m->status = -EINPROGRESS;
-
- spin_lock_irqsave(&mpc8xxx_spi->lock, flags);
- list_add_tail(&m->queue, &mpc8xxx_spi->queue);
- queue_work(mpc8xxx_spi->workqueue, &mpc8xxx_spi->work);
- spin_unlock_irqrestore(&mpc8xxx_spi->lock, flags);
-
- return 0;
-}
-
-void mpc8xxx_spi_cleanup(struct spi_device *spi)
-{
- kfree(spi->controller_state);
-}
+EXPORT_SYMBOL_GPL(to_of_pinfo);
const char *mpc8xxx_spi_strmode(unsigned int flags)
{
@@ -118,26 +76,24 @@ const char *mpc8xxx_spi_strmode(unsigned int flags)
}
return "CPU";
}
+EXPORT_SYMBOL_GPL(mpc8xxx_spi_strmode);
-int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
+void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
unsigned int irq)
{
- struct fsl_spi_platform_data *pdata = dev->platform_data;
- struct spi_master *master;
+ struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
+ struct spi_controller *ctlr;
struct mpc8xxx_spi *mpc8xxx_spi;
- int ret = 0;
- master = dev_get_drvdata(dev);
+ ctlr = dev_get_drvdata(dev);
/* the spi->mode bits understood by this driver: */
- master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH
+ ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH
| SPI_LSB_FIRST | SPI_LOOP;
- master->transfer = mpc8xxx_spi_transfer;
- master->cleanup = mpc8xxx_spi_cleanup;
- master->dev.of_node = dev->of_node;
+ ctlr->dev.of_node = dev->of_node;
- mpc8xxx_spi = spi_master_get_devdata(master);
+ mpc8xxx_spi = spi_controller_get_devdata(ctlr);
mpc8xxx_spi->dev = dev;
mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8;
mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8;
@@ -148,48 +104,12 @@ int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
mpc8xxx_spi->rx_shift = 0;
mpc8xxx_spi->tx_shift = 0;
- init_completion(&mpc8xxx_spi->done);
-
- master->bus_num = pdata->bus_num;
- master->num_chipselect = pdata->max_chipselect;
+ ctlr->bus_num = pdata->bus_num;
+ ctlr->num_chipselect = pdata->max_chipselect;
- spin_lock_init(&mpc8xxx_spi->lock);
init_completion(&mpc8xxx_spi->done);
- INIT_WORK(&mpc8xxx_spi->work, mpc8xxx_spi_work);
- INIT_LIST_HEAD(&mpc8xxx_spi->queue);
-
- mpc8xxx_spi->workqueue = create_singlethread_workqueue(
- dev_name(master->dev.parent));
- if (mpc8xxx_spi->workqueue == NULL) {
- ret = -EBUSY;
- goto err;
- }
-
- return 0;
-
-err:
- return ret;
-}
-
-int mpc8xxx_spi_remove(struct device *dev)
-{
- struct mpc8xxx_spi *mpc8xxx_spi;
- struct spi_master *master;
-
- master = dev_get_drvdata(dev);
- mpc8xxx_spi = spi_master_get_devdata(master);
-
- flush_workqueue(mpc8xxx_spi->workqueue);
- destroy_workqueue(mpc8xxx_spi->workqueue);
- spi_unregister_master(master);
-
- free_irq(mpc8xxx_spi->irq, mpc8xxx_spi);
-
- if (mpc8xxx_spi->spi_remove)
- mpc8xxx_spi->spi_remove(mpc8xxx_spi);
-
- return 0;
}
+EXPORT_SYMBOL_GPL(mpc8xxx_spi_probe);
int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
{
@@ -200,9 +120,9 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
const void *prop;
int ret = -ENOMEM;
- pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
+ pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL);
if (!pinfo)
- return -ENOMEM;
+ return ret;
pdata = &pinfo->pdata;
dev->platform_data = pdata;
@@ -215,15 +135,13 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
pdata->sysclk = get_brgfreq();
if (pdata->sysclk == -1) {
pdata->sysclk = fsl_get_sys_freq();
- if (pdata->sysclk == -1) {
- ret = -ENODEV;
- goto err;
- }
+ if (pdata->sysclk == -1)
+ return -ENODEV;
}
#else
ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk);
if (ret)
- goto err;
+ return ret;
#endif
prop = of_get_property(np, "mode", NULL);
@@ -237,8 +155,8 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
pdata->flags = SPI_CPM_MODE | SPI_CPM1;
return 0;
-
-err:
- kfree(pinfo);
- return ret;
}
+EXPORT_SYMBOL_GPL(of_mpc8xxx_spi_probe);
+
+MODULE_DESCRIPTION("Freescale SPI/eSPI controller driver library");
+MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-21 21:35:57 +0000