Message-Id: <1393418614-3968549-5-git-send-email-arnd@arndb.de>
Date:	Wed, 26 Feb 2014 13:43:33 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, Sekhar Nori <nsekhar@...com>,
	Kevin Hilman <khilman@...prootsystems.com>,
	davinci-linux-open-source@...ux.davincidsp.com,
	Cyril Chemparathy <cyril@...com>,
	Arnd Bergmann <arnd@...db.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4/5] mfd: remove obsolete ti-ssp driver

The tnetv107x platform is getting removed, so this driver
is not needed any more.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Samuel Ortiz <sameo@...ux.intel.com>
Cc: Lee Jones <lee.jones@...aro.org>
---
 drivers/mfd/Kconfig  |  11 --
 drivers/mfd/Makefile |   1 -
 drivers/mfd/ti-ssp.c | 465 ---------------------------------------------------
 3 files changed, 477 deletions(-)
 delete mode 100644 drivers/mfd/ti-ssp.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 49bb445..e0f61e3 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -774,17 +774,6 @@ config MFD_PALMAS
 	  If you say yes here you get support for the Palmas
 	  series of PMIC chips from Texas Instruments.
 
-config MFD_TI_SSP
-	tristate "TI Sequencer Serial Port support"
-	depends on ARCH_DAVINCI_TNETV107X
-	select MFD_CORE
-	---help---
-	  Say Y here if you want support for the Sequencer Serial Port
-	  in a Texas Instruments TNETV107X SoC.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called ti-ssp.
-
 config TPS6105X
 	tristate "TI TPS61050/61052 Boost Converters"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5aea5ef..40e2a6d 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o
 
 obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o
 obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o
-obj-$(CONFIG_MFD_TI_SSP)	+= ti-ssp.o
 obj-$(CONFIG_MFD_TI_AM335X_TSCADC)	+= ti_am335x_tscadc.o
 
 obj-$(CONFIG_MFD_STA2X11)	+= sta2x11-mfd.o
diff --git a/drivers/mfd/ti-ssp.c b/drivers/mfd/ti-ssp.c
deleted file mode 100644
index a542457..0000000
--- a/drivers/mfd/ti-ssp.c
+++ /dev/null
@@ -1,465 +0,0 @@
-/*
- * Sequencer Serial Port (SSP) driver for Texas Instruments' SoCs
- *
- * Copyright (C) 2010 Texas Instruments 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/wait.h>
-#include <linux/clk.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/sched.h>
-#include <linux/mfd/core.h>
-#include <linux/mfd/ti_ssp.h>
-
-/* Register Offsets */
-#define REG_REV		0x00
-#define REG_IOSEL_1	0x04
-#define REG_IOSEL_2	0x08
-#define REG_PREDIV	0x0c
-#define REG_INTR_ST	0x10
-#define REG_INTR_EN	0x14
-#define REG_TEST_CTRL	0x18
-
-/* Per port registers */
-#define PORT_CFG_2	0x00
-#define PORT_ADDR	0x04
-#define PORT_DATA	0x08
-#define PORT_CFG_1	0x0c
-#define PORT_STATE	0x10
-
-#define SSP_PORT_CONFIG_MASK	(SSP_EARLY_DIN | SSP_DELAY_DOUT)
-#define SSP_PORT_CLKRATE_MASK	0x0f
-
-#define SSP_SEQRAM_WR_EN	BIT(4)
-#define SSP_SEQRAM_RD_EN	BIT(5)
-#define SSP_START		BIT(15)
-#define SSP_BUSY		BIT(10)
-#define SSP_PORT_ASL		BIT(7)
-#define SSP_PORT_CFO1		BIT(6)
-
-#define SSP_PORT_SEQRAM_SIZE	32
-
-static const int ssp_port_base[]   = {0x040, 0x080};
-static const int ssp_port_seqram[] = {0x100, 0x180};
-
-struct ti_ssp {
-	struct resource		*res;
-	struct device		*dev;
-	void __iomem		*regs;
-	spinlock_t		lock;
-	struct clk		*clk;
-	int			irq;
-	wait_queue_head_t	wqh;
-
-	/*
-	 * Some of the iosel2 register bits always read-back as 0, we need to
-	 * remember these values so that we don't clobber previously set
-	 * values.
-	 */
-	u32			iosel2;
-};
-
-static inline struct ti_ssp *dev_to_ssp(struct device *dev)
-{
-	return dev_get_drvdata(dev->parent);
-}
-
-static inline int dev_to_port(struct device *dev)
-{
-	return to_platform_device(dev)->id;
-}
-
-/* Register Access Helpers, rmw() functions need to run locked */
-static inline u32 ssp_read(struct ti_ssp *ssp, int reg)
-{
-	return __raw_readl(ssp->regs + reg);
-}
-
-static inline void ssp_write(struct ti_ssp *ssp, int reg, u32 val)
-{
-	__raw_writel(val, ssp->regs + reg);
-}
-
-static inline void ssp_rmw(struct ti_ssp *ssp, int reg, u32 mask, u32 bits)
-{
-	ssp_write(ssp, reg, (ssp_read(ssp, reg) & ~mask) | bits);
-}
-
-static inline u32 ssp_port_read(struct ti_ssp *ssp, int port, int reg)
-{
-	return ssp_read(ssp, ssp_port_base[port] + reg);
-}
-
-static inline void ssp_port_write(struct ti_ssp *ssp, int port, int reg,
-				  u32 val)
-{
-	ssp_write(ssp, ssp_port_base[port] + reg, val);
-}
-
-static inline void ssp_port_rmw(struct ti_ssp *ssp, int port, int reg,
-				u32 mask, u32 bits)
-{
-	ssp_rmw(ssp, ssp_port_base[port] + reg, mask, bits);
-}
-
-static inline void ssp_port_clr_bits(struct ti_ssp *ssp, int port, int reg,
-				     u32 bits)
-{
-	ssp_port_rmw(ssp, port, reg, bits, 0);
-}
-
-static inline void ssp_port_set_bits(struct ti_ssp *ssp, int port, int reg,
-				     u32 bits)
-{
-	ssp_port_rmw(ssp, port, reg, 0, bits);
-}
-
-/* Called to setup port clock mode, caller must hold ssp->lock */
-static int __set_mode(struct ti_ssp *ssp, int port, int mode)
-{
-	mode &= SSP_PORT_CONFIG_MASK;
-	ssp_port_rmw(ssp, port, PORT_CFG_1, SSP_PORT_CONFIG_MASK, mode);
-
-	return 0;
-}
-
-int ti_ssp_set_mode(struct device *dev, int mode)
-{
-	struct ti_ssp *ssp = dev_to_ssp(dev);
-	int port = dev_to_port(dev);
-	int ret;
-
-	spin_lock(&ssp->lock);
-	ret = __set_mode(ssp, port, mode);
-	spin_unlock(&ssp->lock);
-
-	return ret;
-}
-EXPORT_SYMBOL(ti_ssp_set_mode);
-
-/* Called to setup iosel2, caller must hold ssp->lock */
-static void __set_iosel2(struct ti_ssp *ssp, u32 mask, u32 val)
-{
-	ssp->iosel2 = (ssp->iosel2 & ~mask) | val;
-	ssp_write(ssp, REG_IOSEL_2, ssp->iosel2);
-}
-
-/* Called to setup port iosel, caller must hold ssp->lock */
-static void __set_iosel(struct ti_ssp *ssp, int port, u32 iosel)
-{
-	unsigned val, shift = port ? 16 : 0;
-
-	/* IOSEL1 gets the least significant 16 bits */
-	val = ssp_read(ssp, REG_IOSEL_1);
-	val &= 0xffff << (port ? 0 : 16);
-	val |= (iosel & 0xffff) << (port ? 16 : 0);
-	ssp_write(ssp, REG_IOSEL_1, val);
-
-	/* IOSEL2 gets the most significant 16 bits */
-	val = (iosel >> 16) & 0x7;
-	__set_iosel2(ssp, 0x7 << shift, val << shift);
-}
-
-int ti_ssp_set_iosel(struct device *dev, u32 iosel)
-{
-	struct ti_ssp *ssp = dev_to_ssp(dev);
-	int port = dev_to_port(dev);
-
-	spin_lock(&ssp->lock);
-	__set_iosel(ssp, port, iosel);
-	spin_unlock(&ssp->lock);
-
-	return 0;
-}
-EXPORT_SYMBOL(ti_ssp_set_iosel);
-
-int ti_ssp_load(struct device *dev, int offs, u32* prog, int len)
-{
-	struct ti_ssp *ssp = dev_to_ssp(dev);
-	int port = dev_to_port(dev);
-	int i;
-
-	if (len > SSP_PORT_SEQRAM_SIZE)
-		return -ENOSPC;
-
-	spin_lock(&ssp->lock);
-
-	/* Enable SeqRAM access */
-	ssp_port_set_bits(ssp, port, PORT_CFG_2, SSP_SEQRAM_WR_EN);
-
-	/* Copy code */
-	for (i = 0; i < len; i++) {
-		__raw_writel(prog[i], ssp->regs + offs + 4*i +
-			     ssp_port_seqram[port]);
-	}
-
-	/* Disable SeqRAM access */
-	ssp_port_clr_bits(ssp, port, PORT_CFG_2, SSP_SEQRAM_WR_EN);
-
-	spin_unlock(&ssp->lock);
-
-	return 0;
-}
-EXPORT_SYMBOL(ti_ssp_load);
-
-int ti_ssp_raw_read(struct device *dev)
-{
-	struct ti_ssp *ssp = dev_to_ssp(dev);
-	int port = dev_to_port(dev);
-	int shift = port ? 27 : 11;
-
-	return (ssp_read(ssp, REG_IOSEL_2) >> shift) & 0xf;
-}
-EXPORT_SYMBOL(ti_ssp_raw_read);
-
-int ti_ssp_raw_write(struct device *dev, u32 val)
-{
-	struct ti_ssp *ssp = dev_to_ssp(dev);
-	int port = dev_to_port(dev), shift;
-
-	spin_lock(&ssp->lock);
-
-	shift = port ? 22 : 6;
-	val &= 0xf;
-	__set_iosel2(ssp, 0xf << shift, val << shift);
-
-	spin_unlock(&ssp->lock);
-
-	return 0;
-}
-EXPORT_SYMBOL(ti_ssp_raw_write);
-
-static inline int __xfer_done(struct ti_ssp *ssp, int port)
-{
-	return !(ssp_port_read(ssp, port, PORT_CFG_1) & SSP_BUSY);
-}
-
-int ti_ssp_run(struct device *dev, u32 pc, u32 input, u32 *output)
-{
-	struct ti_ssp *ssp = dev_to_ssp(dev);
-	int port = dev_to_port(dev);
-	int ret;
-
-	if (pc & ~(0x3f))
-		return -EINVAL;
-
-	/* Grab ssp->lock to serialize rmw on ssp registers */
-	spin_lock(&ssp->lock);
-
-	ssp_port_write(ssp, port, PORT_ADDR, input >> 16);
-	ssp_port_write(ssp, port, PORT_DATA, input & 0xffff);
-	ssp_port_rmw(ssp, port, PORT_CFG_1, 0x3f, pc);
-
-	/* grab wait queue head lock to avoid race with the isr */
-	spin_lock_irq(&ssp->wqh.lock);
-
-	/* kick off sequence execution in hardware */
-	ssp_port_set_bits(ssp, port, PORT_CFG_1, SSP_START);
-
-	/* drop ssp lock; no register writes beyond this */
-	spin_unlock(&ssp->lock);
-
-	ret = wait_event_interruptible_locked_irq(ssp->wqh,
-						  __xfer_done(ssp, port));
-	spin_unlock_irq(&ssp->wqh.lock);
-
-	if (ret < 0)
-		return ret;
-
-	if (output) {
-		*output = (ssp_port_read(ssp, port, PORT_ADDR) << 16) |
-			  (ssp_port_read(ssp, port, PORT_DATA) &  0xffff);
-	}
-
-	ret = ssp_port_read(ssp, port, PORT_STATE) & 0x3f; /* stop address */
-
-	return ret;
-}
-EXPORT_SYMBOL(ti_ssp_run);
-
-static irqreturn_t ti_ssp_interrupt(int irq, void *dev_data)
-{
-	struct ti_ssp *ssp = dev_data;
-
-	spin_lock(&ssp->wqh.lock);
-
-	ssp_write(ssp, REG_INTR_ST, 0x3);
-	wake_up_locked(&ssp->wqh);
-
-	spin_unlock(&ssp->wqh.lock);
-
-	return IRQ_HANDLED;
-}
-
-static int ti_ssp_probe(struct platform_device *pdev)
-{
-	static struct ti_ssp *ssp;
-	const struct ti_ssp_data *pdata = dev_get_platdata(&pdev->dev);
-	int error = 0, prediv = 0xff, id;
-	unsigned long sysclk;
-	struct device *dev = &pdev->dev;
-	struct mfd_cell cells[2];
-
-	ssp = kzalloc(sizeof(*ssp), GFP_KERNEL);
-	if (!ssp) {
-		dev_err(dev, "cannot allocate device info\n");
-		return -ENOMEM;
-	}
-
-	ssp->dev = dev;
-	dev_set_drvdata(dev, ssp);
-
-	ssp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!ssp->res) {
-		error = -ENODEV;
-		dev_err(dev, "cannot determine register area\n");
-		goto error_res;
-	}
-
-	if (!request_mem_region(ssp->res->start, resource_size(ssp->res),
-				pdev->name)) {
-		error = -ENOMEM;
-		dev_err(dev, "cannot claim register memory\n");
-		goto error_res;
-	}
-
-	ssp->regs = ioremap(ssp->res->start, resource_size(ssp->res));
-	if (!ssp->regs) {
-		error = -ENOMEM;
-		dev_err(dev, "cannot map register memory\n");
-		goto error_map;
-	}
-
-	ssp->clk = clk_get(dev, NULL);
-	if (IS_ERR(ssp->clk)) {
-		error = PTR_ERR(ssp->clk);
-		dev_err(dev, "cannot claim device clock\n");
-		goto error_clk;
-	}
-
-	ssp->irq = platform_get_irq(pdev, 0);
-	if (ssp->irq < 0) {
-		error = -ENODEV;
-		dev_err(dev, "unknown irq\n");
-		goto error_irq;
-	}
-
-	error = request_threaded_irq(ssp->irq, NULL, ti_ssp_interrupt, 0,
-				     dev_name(dev), ssp);
-	if (error < 0) {
-		dev_err(dev, "cannot acquire irq\n");
-		goto error_irq;
-	}
-
-	spin_lock_init(&ssp->lock);
-	init_waitqueue_head(&ssp->wqh);
-
-	/* Power on and initialize SSP */
-	error = clk_enable(ssp->clk);
-	if (error) {
-		dev_err(dev, "cannot enable device clock\n");
-		goto error_enable;
-	}
-
-	/* Reset registers to a sensible known state */
-	ssp_write(ssp, REG_IOSEL_1, 0);
-	ssp_write(ssp, REG_IOSEL_2, 0);
-	ssp_write(ssp, REG_INTR_EN, 0x3);
-	ssp_write(ssp, REG_INTR_ST, 0x3);
-	ssp_write(ssp, REG_TEST_CTRL, 0);
-	ssp_port_write(ssp, 0, PORT_CFG_1, SSP_PORT_ASL);
-	ssp_port_write(ssp, 1, PORT_CFG_1, SSP_PORT_ASL);
-	ssp_port_write(ssp, 0, PORT_CFG_2, SSP_PORT_CFO1);
-	ssp_port_write(ssp, 1, PORT_CFG_2, SSP_PORT_CFO1);
-
-	sysclk = clk_get_rate(ssp->clk);
-	if (pdata && pdata->out_clock)
-		prediv = (sysclk / pdata->out_clock) - 1;
-	prediv = clamp(prediv, 0, 0xff);
-	ssp_rmw(ssp, REG_PREDIV, 0xff, prediv);
-
-	memset(cells, 0, sizeof(cells));
-	for (id = 0; id < 2; id++) {
-		const struct ti_ssp_dev_data *data = &pdata->dev_data[id];
-
-		cells[id].id		= id;
-		cells[id].name		= data->dev_name;
-		cells[id].platform_data	= data->pdata;
-	}
-
-	error = mfd_add_devices(dev, 0, cells, 2, NULL, 0, NULL);
-	if (error < 0) {
-		dev_err(dev, "cannot add mfd cells\n");
-		goto error_enable;
-	}
-
-	return 0;
-
-error_enable:
-	free_irq(ssp->irq, ssp);
-error_irq:
-	clk_put(ssp->clk);
-error_clk:
-	iounmap(ssp->regs);
-error_map:
-	release_mem_region(ssp->res->start, resource_size(ssp->res));
-error_res:
-	kfree(ssp);
-	return error;
-}
-
-static int ti_ssp_remove(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct ti_ssp *ssp = dev_get_drvdata(dev);
-
-	mfd_remove_devices(dev);
-	clk_disable(ssp->clk);
-	free_irq(ssp->irq, ssp);
-	clk_put(ssp->clk);
-	iounmap(ssp->regs);
-	release_mem_region(ssp->res->start, resource_size(ssp->res));
-	kfree(ssp);
-	return 0;
-}
-
-static struct platform_driver ti_ssp_driver = {
-	.probe		= ti_ssp_probe,
-	.remove		= ti_ssp_remove,
-	.driver		= {
-		.name	= "ti-ssp",
-		.owner	= THIS_MODULE,
-	}
-};
-
-module_platform_driver(ti_ssp_driver);
-
-MODULE_DESCRIPTION("Sequencer Serial Port (SSP) Driver");
-MODULE_AUTHOR("Cyril Chemparathy");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ti-ssp");
-- 
1.8.3.2

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