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Subject[Blackfin removal] [PATCH 25/28] staging: Remove Blackfin iio trigger timer support
Date
Signed-off-by: Aaron Wu <aaron.wu@analog.com>

Remove Blackfin iio trigger timer support
---
drivers/staging/iio/Kconfig | 1 -
drivers/staging/iio/Makefile | 1 -
drivers/staging/iio/trigger/Kconfig | 19 --
drivers/staging/iio/trigger/Makefile | 5 -
drivers/staging/iio/trigger/iio-trig-bfin-timer.c | 292 ----------------------
drivers/staging/iio/trigger/iio-trig-bfin-timer.h | 25 --
6 files changed, 343 deletions(-)
delete mode 100644 drivers/staging/iio/trigger/Kconfig
delete mode 100644 drivers/staging/iio/trigger/Makefile
delete mode 100644 drivers/staging/iio/trigger/iio-trig-bfin-timer.c
delete mode 100644 drivers/staging/iio/trigger/iio-trig-bfin-timer.h

diff --git a/drivers/staging/iio/Kconfig b/drivers/staging/iio/Kconfig
index 8abc1ab..bd94459 100644
--- a/drivers/staging/iio/Kconfig
+++ b/drivers/staging/iio/Kconfig
@@ -14,6 +14,5 @@ source "drivers/staging/iio/impedance-analyzer/Kconfig"
source "drivers/staging/iio/light/Kconfig"
source "drivers/staging/iio/meter/Kconfig"
source "drivers/staging/iio/resolver/Kconfig"
-source "drivers/staging/iio/trigger/Kconfig"

endmenu
diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile
index 455bffc..e99a375 100644
--- a/drivers/staging/iio/Makefile
+++ b/drivers/staging/iio/Makefile
@@ -13,4 +13,3 @@ obj-y += impedance-analyzer/
obj-y += light/
obj-y += meter/
obj-y += resolver/
-obj-y += trigger/
diff --git a/drivers/staging/iio/trigger/Kconfig b/drivers/staging/iio/trigger/Kconfig
deleted file mode 100644
index 0b01d24..0000000
--- a/drivers/staging/iio/trigger/Kconfig
+++ /dev/null
@@ -1,19 +0,0 @@
- #
-# Industrial I/O standalone triggers
-#
-comment "Triggers - standalone"
-
-if IIO_TRIGGER
-
-config IIO_BFIN_TMR_TRIGGER
- tristate "Blackfin TIMER trigger"
- depends on BLACKFIN
- select BFIN_GPTIMERS
- help
- Provides support for using a Blackfin timer as IIO triggers.
- If unsure, say N (but it's safe to say "Y").
-
- To compile this driver as a module, choose M here: the
- module will be called iio-trig-bfin-timer.
-
-endif # IIO_TRIGGER
diff --git a/drivers/staging/iio/trigger/Makefile b/drivers/staging/iio/trigger/Makefile
deleted file mode 100644
index 1300a21..0000000
--- a/drivers/staging/iio/trigger/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-#
-# Makefile for triggers not associated with iio-devices
-#
-
-obj-$(CONFIG_IIO_BFIN_TMR_TRIGGER) += iio-trig-bfin-timer.o
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
deleted file mode 100644
index 71f11d7..0000000
--- a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
+++ /dev/null
@@ -1,292 +0,0 @@
-/*
- * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-
-#include <asm/gptimers.h>
-#include <asm/portmux.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/trigger.h>
-
-#include "iio-trig-bfin-timer.h"
-
-struct bfin_timer {
- unsigned short id, bit;
- unsigned long irqbit;
- int irq;
- int pin;
-};
-
-/*
- * this covers all hardware timer configurations on
- * all Blackfin derivatives out there today
- */
-
-static struct bfin_timer iio_bfin_timer_code[MAX_BLACKFIN_GPTIMERS] = {
- {TIMER0_id, TIMER0bit, TIMER_STATUS_TIMIL0, IRQ_TIMER0, P_TMR0},
- {TIMER1_id, TIMER1bit, TIMER_STATUS_TIMIL1, IRQ_TIMER1, P_TMR1},
- {TIMER2_id, TIMER2bit, TIMER_STATUS_TIMIL2, IRQ_TIMER2, P_TMR2},
-#if (MAX_BLACKFIN_GPTIMERS > 3)
- {TIMER3_id, TIMER3bit, TIMER_STATUS_TIMIL3, IRQ_TIMER3, P_TMR3},
- {TIMER4_id, TIMER4bit, TIMER_STATUS_TIMIL4, IRQ_TIMER4, P_TMR4},
- {TIMER5_id, TIMER5bit, TIMER_STATUS_TIMIL5, IRQ_TIMER5, P_TMR5},
- {TIMER6_id, TIMER6bit, TIMER_STATUS_TIMIL6, IRQ_TIMER6, P_TMR6},
- {TIMER7_id, TIMER7bit, TIMER_STATUS_TIMIL7, IRQ_TIMER7, P_TMR7},
-#endif
-#if (MAX_BLACKFIN_GPTIMERS > 8)
- {TIMER8_id, TIMER8bit, TIMER_STATUS_TIMIL8, IRQ_TIMER8, P_TMR8},
- {TIMER9_id, TIMER9bit, TIMER_STATUS_TIMIL9, IRQ_TIMER9, P_TMR9},
- {TIMER10_id, TIMER10bit, TIMER_STATUS_TIMIL10, IRQ_TIMER10, P_TMR10},
-#if (MAX_BLACKFIN_GPTIMERS > 11)
- {TIMER11_id, TIMER11bit, TIMER_STATUS_TIMIL11, IRQ_TIMER11, P_TMR11},
-#endif
-#endif
-};
-
-struct bfin_tmr_state {
- struct iio_trigger *trig;
- struct bfin_timer *t;
- unsigned int timer_num;
- bool output_enable;
- unsigned int duty;
- int irq;
-};
-
-static int iio_bfin_tmr_set_state(struct iio_trigger *trig, bool state)
-{
- struct bfin_tmr_state *st = iio_trigger_get_drvdata(trig);
-
- if (get_gptimer_period(st->t->id) == 0)
- return -EINVAL;
-
- if (state)
- enable_gptimers(st->t->bit);
- else
- disable_gptimers(st->t->bit);
-
- return 0;
-}
-
-static ssize_t frequency_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct iio_trigger *trig = to_iio_trigger(dev);
- struct bfin_tmr_state *st = iio_trigger_get_drvdata(trig);
- unsigned int val;
- bool enabled;
- int ret;
-
- ret = kstrtouint(buf, 10, &val);
- if (ret)
- return ret;
-
- if (val > 100000)
- return -EINVAL;
-
- enabled = get_enabled_gptimers() & st->t->bit;
-
- if (enabled)
- disable_gptimers(st->t->bit);
-
- if (!val)
- return count;
-
- val = get_sclk() / val;
- if (val <= 4 || val <= st->duty)
- return -EINVAL;
-
- set_gptimer_period(st->t->id, val);
- set_gptimer_pwidth(st->t->id, val - st->duty);
-
- if (enabled)
- enable_gptimers(st->t->bit);
-
- return count;
-}
-
-static ssize_t frequency_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_trigger *trig = to_iio_trigger(dev);
- struct bfin_tmr_state *st = iio_trigger_get_drvdata(trig);
- unsigned int period = get_gptimer_period(st->t->id);
- unsigned long val;
-
- if (!period)
- val = 0;
- else
- val = get_sclk() / get_gptimer_period(st->t->id);
-
- return sprintf(buf, "%lu\n", val);
-}
-
-static DEVICE_ATTR_RW(frequency);
-
-static struct attribute *iio_bfin_tmr_trigger_attrs[] = {
- &dev_attr_frequency.attr,
- NULL,
-};
-
-static const struct attribute_group iio_bfin_tmr_trigger_attr_group = {
- .attrs = iio_bfin_tmr_trigger_attrs,
-};
-
-static const struct attribute_group *iio_bfin_tmr_trigger_attr_groups[] = {
- &iio_bfin_tmr_trigger_attr_group,
- NULL
-};
-
-static irqreturn_t iio_bfin_tmr_trigger_isr(int irq, void *devid)
-{
- struct bfin_tmr_state *st = devid;
-
- clear_gptimer_intr(st->t->id);
- iio_trigger_poll(st->trig);
-
- return IRQ_HANDLED;
-}
-
-static int iio_bfin_tmr_get_number(int irq)
-{
- int i;
-
- for (i = 0; i < MAX_BLACKFIN_GPTIMERS; i++)
- if (iio_bfin_timer_code[i].irq == irq)
- return i;
-
- return -ENODEV;
-}
-
-static const struct iio_trigger_ops iio_bfin_tmr_trigger_ops = {
- .set_trigger_state = iio_bfin_tmr_set_state,
-};
-
-static int iio_bfin_tmr_trigger_probe(struct platform_device *pdev)
-{
- struct iio_bfin_timer_trigger_pdata *pdata;
- struct bfin_tmr_state *st;
- unsigned int config;
- int ret;
-
- st = devm_kzalloc(&pdev->dev, sizeof(*st), GFP_KERNEL);
- if (!st)
- return -ENOMEM;
-
- st->irq = platform_get_irq(pdev, 0);
- if (st->irq < 0) {
- dev_err(&pdev->dev, "No IRQs specified");
- return st->irq;
- }
-
- ret = iio_bfin_tmr_get_number(st->irq);
- if (ret < 0)
- return ret;
-
- st->timer_num = ret;
- st->t = &iio_bfin_timer_code[st->timer_num];
-
- st->trig = iio_trigger_alloc("bfintmr%d", st->timer_num);
- if (!st->trig)
- return -ENOMEM;
-
- st->trig->ops = &iio_bfin_tmr_trigger_ops;
- st->trig->dev.groups = iio_bfin_tmr_trigger_attr_groups;
- iio_trigger_set_drvdata(st->trig, st);
- ret = iio_trigger_register(st->trig);
- if (ret)
- goto out;
-
- ret = request_irq(st->irq, iio_bfin_tmr_trigger_isr,
- 0, st->trig->name, st);
- if (ret) {
- dev_err(&pdev->dev,
- "request IRQ-%d failed", st->irq);
- goto out1;
- }
-
- config = PWM_OUT | PERIOD_CNT | IRQ_ENA;
-
- pdata = dev_get_platdata(&pdev->dev);
- if (pdata && pdata->output_enable) {
- unsigned long long val;
-
- st->output_enable = true;
-
- ret = peripheral_request(st->t->pin, st->trig->name);
- if (ret)
- goto out_free_irq;
-
- val = (unsigned long long)get_sclk() * pdata->duty_ns;
- do_div(val, NSEC_PER_SEC);
- st->duty = val;
-
- /**
- * The interrupt will be generated at the end of the period,
- * since we want the interrupt to be generated at end of the
- * pulse we invert both polarity and duty cycle, so that the
- * pulse will be generated directly before the interrupt.
- */
- if (pdata->active_low)
- config |= PULSE_HI;
- } else {
- st->duty = 1;
- config |= OUT_DIS;
- }
-
- set_gptimer_config(st->t->id, config);
-
- dev_info(&pdev->dev, "iio trigger Blackfin TMR%d, IRQ-%d",
- st->timer_num, st->irq);
- platform_set_drvdata(pdev, st);
-
- return 0;
-out_free_irq:
- free_irq(st->irq, st);
-out1:
- iio_trigger_unregister(st->trig);
-out:
- iio_trigger_free(st->trig);
- return ret;
-}
-
-static int iio_bfin_tmr_trigger_remove(struct platform_device *pdev)
-{
- struct bfin_tmr_state *st = platform_get_drvdata(pdev);
-
- disable_gptimers(st->t->bit);
- if (st->output_enable)
- peripheral_free(st->t->pin);
- free_irq(st->irq, st);
- iio_trigger_unregister(st->trig);
- iio_trigger_free(st->trig);
-
- return 0;
-}
-
-static struct platform_driver iio_bfin_tmr_trigger_driver = {
- .driver = {
- .name = "iio_bfin_tmr_trigger",
- },
- .probe = iio_bfin_tmr_trigger_probe,
- .remove = iio_bfin_tmr_trigger_remove,
-};
-
-module_platform_driver(iio_bfin_tmr_trigger_driver);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Blackfin system timer based trigger for the iio subsystem");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:iio-trig-bfin-timer");
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.h b/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
deleted file mode 100644
index fb05a2a..0000000
--- a/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __IIO_BFIN_TIMER_TRIGGER_H__
-#define __IIO_BFIN_TIMER_TRIGGER_H__
-
-/**
- * struct iio_bfin_timer_trigger_pdata - timer trigger platform data
- * @output_enable: Enable external trigger pulse generation.
- * @active_low: Whether the trigger pulse is active low.
- * @duty_ns: Length of the trigger pulse in nanoseconds.
- *
- * This struct is used to configure the output pulse generation of the blackfin
- * timer trigger. If output_enable is set to true an external trigger signal
- * will generated on the pin corresponding to the timer. This is useful for
- * converters which needs an external signal to start conversion. active_low and
- * duty_ns are used to configure the type of the trigger pulse. If output_enable
- * is set to false no external trigger pulse will be generated and active_low
- * and duty_ns are ignored.
- **/
-struct iio_bfin_timer_trigger_pdata {
- bool output_enable;
- bool active_low;
- unsigned int duty_ns;
-};
-
-#endif
--
2.7.4
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