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Commit 305e503b authored by Arnd Bergmann's avatar Arnd Bergmann
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spi: remove w90x900 driver 

The ARM w90x900 platform is getting removed, so this driver is obsolete.

Link: https://lore.kernel.org/r/20190809202749.742267-8-arnd@arndb.deSigned-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 00d2fbf7
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drivers/spi/Kconfig
View file @ 305e503b
......@@ -440,13 +440,6 @@ config SPI_NPCM_PSPI
This driver provides support for Nuvoton NPCM BMC
Peripheral SPI controller in master mode.
config SPI_NUC900
tristate "Nuvoton NUC900 series SPI"
depends on ARCH_W90X900
select SPI_BITBANG
help
SPI driver for Nuvoton NUC900 series ARM SoCs
config SPI_LANTIQ_SSC
tristate "Lantiq SSC SPI controller"
depends on LANTIQ || COMPILE_TEST
......
drivers/spi/Makefile
View file @ 305e503b
......@@ -64,7 +64,6 @@ obj-$(CONFIG_SPI_MT7621) += spi-mt7621.o
obj-$(CONFIG_SPI_MXIC) += spi-mxic.o
obj-$(CONFIG_SPI_MXS) += spi-mxs.o
obj-$(CONFIG_SPI_NPCM_PSPI) += spi-npcm-pspi.o
obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
obj-$(CONFIG_SPI_NXP_FLEXSPI) += spi-nxp-fspi.o
obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o
spi-octeon-objs := spi-cavium.o spi-cavium-octeon.o
......
drivers/spi/spi-nuc900.c deleted 100644 → 0
View file @ 00d2fbf7
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2009 Nuvoton technology.
* Wan ZongShun <mcuos.com@gmail.com>
*/
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#include <linux/platform_data/spi-nuc900.h>
/* usi registers offset */
#define USI_CNT 0x00
#define USI_DIV 0x04
#define USI_SSR 0x08
#define USI_RX0 0x10
#define USI_TX0 0x10
/* usi register bit */
#define ENINT (0x01 << 17)
#define ENFLG (0x01 << 16)
#define SLEEP (0x0f << 12)
#define TXNUM (0x03 << 8)
#define TXBITLEN (0x1f << 3)
#define TXNEG (0x01 << 2)
#define RXNEG (0x01 << 1)
#define LSB (0x01 << 10)
#define SELECTLEV (0x01 << 2)
#define SELECTPOL (0x01 << 31)
#define SELECTSLAVE 0x01
#define GOBUSY 0x01
struct nuc900_spi {
struct spi_bitbang bitbang;
struct completion done;
void __iomem *regs;
int irq;
int len;
int count;
const unsigned char *tx;
unsigned char *rx;
struct clk *clk;
struct spi_master *master;
struct nuc900_spi_info *pdata;
spinlock_t lock;
};
static inline struct nuc900_spi *to_hw(struct spi_device *sdev)
{
return spi_master_get_devdata(sdev->master);
}
static void nuc900_slave_select(struct spi_device *spi, unsigned int ssr)
{
struct nuc900_spi *hw = to_hw(spi);
unsigned int val;
unsigned int cs = spi->mode & SPI_CS_HIGH ? 1 : 0;
unsigned int cpol = spi->mode & SPI_CPOL ? 1 : 0;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_SSR);
if (!cs)
val &= ~SELECTLEV;
else
val |= SELECTLEV;
if (!ssr)
val &= ~SELECTSLAVE;
else
val |= SELECTSLAVE;
__raw_writel(val, hw->regs + USI_SSR);
val = __raw_readl(hw->regs + USI_CNT);
if (!cpol)
val &= ~SELECTPOL;
else
val |= SELECTPOL;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_spi_chipsel(struct spi_device *spi, int value)
{
switch (value) {
case BITBANG_CS_INACTIVE:
nuc900_slave_select(spi, 0);
break;
case BITBANG_CS_ACTIVE:
nuc900_slave_select(spi, 1);
break;
}
}
static void nuc900_spi_setup_txnum(struct nuc900_spi *hw, unsigned int txnum)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT) & ~TXNUM;
if (txnum)
val |= txnum << 0x08;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_spi_setup_txbitlen(struct nuc900_spi *hw,
unsigned int txbitlen)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT) & ~TXBITLEN;
val |= (txbitlen << 0x03);
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_spi_gobusy(struct nuc900_spi *hw)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT);
val |= GOBUSY;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
{
return hw->tx ? hw->tx[count] : 0;
}
static int nuc900_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
{
struct nuc900_spi *hw = to_hw(spi);
hw->tx = t->tx_buf;
hw->rx = t->rx_buf;
hw->len = t->len;
hw->count = 0;
__raw_writel(hw_txbyte(hw, 0x0), hw->regs + USI_TX0);
nuc900_spi_gobusy(hw);
wait_for_completion(&hw->done);
return hw->count;
}
static irqreturn_t nuc900_spi_irq(int irq, void *dev)
{
struct nuc900_spi *hw = dev;
unsigned int status;
unsigned int count = hw->count;
status = __raw_readl(hw->regs + USI_CNT);
__raw_writel(status, hw->regs + USI_CNT);
if (status & ENFLG) {
hw->count++;
if (hw->rx)
hw->rx[count] = __raw_readl(hw->regs + USI_RX0);
count++;
if (count < hw->len) {
__raw_writel(hw_txbyte(hw, count), hw->regs + USI_TX0);
nuc900_spi_gobusy(hw);
} else {
complete(&hw->done);
}
return IRQ_HANDLED;
}
complete(&hw->done);
return IRQ_HANDLED;
}
static void nuc900_tx_edge(struct nuc900_spi *hw, unsigned int edge)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT);
if (edge)
val |= TXNEG;
else
val &= ~TXNEG;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_rx_edge(struct nuc900_spi *hw, unsigned int edge)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT);
if (edge)
val |= RXNEG;
else
val &= ~RXNEG;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_send_first(struct nuc900_spi *hw, unsigned int lsb)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT);
if (lsb)
val |= LSB;
else
val &= ~LSB;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_set_sleep(struct nuc900_spi *hw, unsigned int sleep)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT) & ~SLEEP;
if (sleep)
val |= (sleep << 12);
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_enable_int(struct nuc900_spi *hw)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&hw->lock, flags);
val = __raw_readl(hw->regs + USI_CNT);
val |= ENINT;
__raw_writel(val, hw->regs + USI_CNT);
spin_unlock_irqrestore(&hw->lock, flags);
}
static void nuc900_set_divider(struct nuc900_spi *hw)
{
__raw_writel(hw->pdata->divider, hw->regs + USI_DIV);
}
static void nuc900_init_spi(struct nuc900_spi *hw)
{
clk_enable(hw->clk);
spin_lock_init(&hw->lock);
nuc900_tx_edge(hw, hw->pdata->txneg);
nuc900_rx_edge(hw, hw->pdata->rxneg);
nuc900_send_first(hw, hw->pdata->lsb);
nuc900_set_sleep(hw, hw->pdata->sleep);
nuc900_spi_setup_txbitlen(hw, hw->pdata->txbitlen);
nuc900_spi_setup_txnum(hw, hw->pdata->txnum);
nuc900_set_divider(hw);
nuc900_enable_int(hw);
}
static int nuc900_spi_probe(struct platform_device *pdev)
{
struct nuc900_spi *hw;
struct spi_master *master;
struct resource *res;
int err = 0;
master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi));
if (master == NULL) {
dev_err(&pdev->dev, "No memory for spi_master\n");
return -ENOMEM;
}
hw = spi_master_get_devdata(master);
hw->master = master;
hw->pdata = dev_get_platdata(&pdev->dev);
if (hw->pdata == NULL) {
dev_err(&pdev->dev, "No platform data supplied\n");
err = -ENOENT;
goto err_pdata;
}
platform_set_drvdata(pdev, hw);
init_completion(&hw->done);
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
if (hw->pdata->lsb)
master->mode_bits |= SPI_LSB_FIRST;
master->num_chipselect = hw->pdata->num_cs;
master->bus_num = hw->pdata->bus_num;
hw->bitbang.master = hw->master;
hw->bitbang.chipselect = nuc900_spi_chipsel;
hw->bitbang.txrx_bufs = nuc900_spi_txrx;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hw->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hw->regs)) {
err = PTR_ERR(hw->regs);
goto err_pdata;
}
hw->irq = platform_get_irq(pdev, 0);
if (hw->irq < 0) {
dev_err(&pdev->dev, "No IRQ specified\n");
err = -ENOENT;
goto err_pdata;
}
err = devm_request_irq(&pdev->dev, hw->irq, nuc900_spi_irq, 0,
pdev->name, hw);
if (err) {
dev_err(&pdev->dev, "Cannot claim IRQ\n");
goto err_pdata;
}
hw->clk = devm_clk_get(&pdev->dev, "spi");
if (IS_ERR(hw->clk)) {
dev_err(&pdev->dev, "No clock for device\n");
err = PTR_ERR(hw->clk);
goto err_pdata;
}
mfp_set_groupg(&pdev->dev, NULL);
nuc900_init_spi(hw);
err = spi_bitbang_start(&hw->bitbang);
if (err) {
dev_err(&pdev->dev, "Failed to register SPI master\n");
goto err_register;
}
return 0;
err_register:
clk_disable(hw->clk);
err_pdata:
spi_master_put(hw->master);
return err;
}
static int nuc900_spi_remove(struct platform_device *dev)
{
struct nuc900_spi *hw = platform_get_drvdata(dev);
spi_bitbang_stop(&hw->bitbang);
clk_disable(hw->clk);
spi_master_put(hw->master);
return 0;
}
static struct platform_driver nuc900_spi_driver = {
.probe = nuc900_spi_probe,
.remove = nuc900_spi_remove,
.driver = {
.name = "nuc900-spi",
},
};
module_platform_driver(nuc900_spi_driver);
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("nuc900 spi driver!");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:nuc900-spi");
include/Kbuild
View file @ 305e503b
......@@ -550,7 +550,6 @@ header-test- += linux/platform_data/sky81452-backlight.h
header-test- += linux/platform_data/spi-davinci.h
header-test- += linux/platform_data/spi-ep93xx.h
header-test- += linux/platform_data/spi-mt65xx.h
header-test- += linux/platform_data/spi-nuc900.h
header-test- += linux/platform_data/st_sensors_pdata.h
header-test- += linux/platform_data/ti-sysc.h
header-test- += linux/platform_data/timer-ixp4xx.h
......
include/linux/platform_data/spi-nuc900.h deleted 100644 → 0
View file @ 00d2fbf7
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2009 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*/
#ifndef __SPI_NUC900_H
#define __SPI_NUC900_H
extern void mfp_set_groupg(struct device *dev, const char *subname);
struct nuc900_spi_info {
unsigned int num_cs;
unsigned int lsb;
unsigned int txneg;
unsigned int rxneg;
unsigned int divider;
unsigned int sleep;
unsigned int txnum;
unsigned int txbitlen;
int bus_num;
};
struct nuc900_spi_chip {
unsigned char bits_per_word;
};
#endif /* __SPI_NUC900_H */
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