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gpio: idio-16: Remove unused legacy interface 

All idio-16 library consumers have migrated to the new interface
leveraging the gpio-regmap API. Legacy interface functions and code are
removed as no longer needed.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/651cff1cc3eb57b455a8048121cf6a4d4367f018.1680618405.git.william.gray@linaro.org/
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
William Breathitt Gray 2023-08-10 18:00:41 -04:00 committed by Bartosz Golaszewski
parent 73d8f3efc5
commit 98aaff7c4e
2 changed files with 1 additions and 195 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

131
drivers/gpio/gpio-idio-16.c
View File

@ -3,15 +3,13 @@
* GPIO library for the ACCES IDIO-16 family
* Copyright (C) 2022 William Breathitt Gray
*/
#include <linux/bitmap.h>
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/gpio/regmap.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include "gpio-idio-16.h"
@ -169,133 +167,6 @@ int devm_idio_16_regmap_register(struct device *const dev,
}
EXPORT_SYMBOL_GPL(devm_idio_16_regmap_register);
/**
* idio_16_get - get signal value at signal offset
* @reg: ACCES IDIO-16 device registers
* @state: ACCES IDIO-16 device state
* @offset: offset of signal to get
*
* Returns the signal value (0=low, 1=high) for the signal at @offset.
*/
int idio_16_get(struct idio_16 __iomem *const reg,
struct idio_16_state *const state, const unsigned long offset)
{
const unsigned long mask = BIT(offset);
if (offset < IDIO_16_NOUT)
return test_bit(offset, state->out_state);
if (offset < 24)
return !!(ioread8(&reg->in0_7) & (mask >> IDIO_16_NOUT));
if (offset < 32)
return !!(ioread8(&reg->in8_15) & (mask >> 24));
return -EINVAL;
}
EXPORT_SYMBOL_GPL(idio_16_get);
/**
* idio_16_get_multiple - get multiple signal values at multiple signal offsets
* @reg: ACCES IDIO-16 device registers
* @state: ACCES IDIO-16 device state
* @mask: mask of signals to get
* @bits: bitmap to store signal values
*
* Stores in @bits the values (0=low, 1=high) for the signals defined by @mask.
*/
void idio_16_get_multiple(struct idio_16 __iomem *const reg,
struct idio_16_state *const state,
const unsigned long *const mask,
unsigned long *const bits)
{
unsigned long flags;
const unsigned long out_mask = GENMASK(IDIO_16_NOUT - 1, 0);
spin_lock_irqsave(&state->lock, flags);
bitmap_replace(bits, bits, state->out_state, &out_mask, IDIO_16_NOUT);
if (*mask & GENMASK(23, 16))
bitmap_set_value8(bits, ioread8(&reg->in0_7), 16);
if (*mask & GENMASK(31, 24))
bitmap_set_value8(bits, ioread8(&reg->in8_15), 24);
spin_unlock_irqrestore(&state->lock, flags);
}
EXPORT_SYMBOL_GPL(idio_16_get_multiple);
/**
* idio_16_set - set signal value at signal offset
* @reg: ACCES IDIO-16 device registers
* @state: ACCES IDIO-16 device state
* @offset: offset of signal to set
* @value: value of signal to set
*
* Assigns output @value for the signal at @offset.
*/
void idio_16_set(struct idio_16 __iomem *const reg,
struct idio_16_state *const state, const unsigned long offset,
const unsigned long value)
{
unsigned long flags;
if (offset >= IDIO_16_NOUT)
return;
spin_lock_irqsave(&state->lock, flags);
__assign_bit(offset, state->out_state, value);
if (offset < 8)
iowrite8(bitmap_get_value8(state->out_state, 0), &reg->out0_7);
else
iowrite8(bitmap_get_value8(state->out_state, 8), &reg->out8_15);
spin_unlock_irqrestore(&state->lock, flags);
}
EXPORT_SYMBOL_GPL(idio_16_set);
/**
* idio_16_set_multiple - set signal values at multiple signal offsets
* @reg: ACCES IDIO-16 device registers
* @state: ACCES IDIO-16 device state
* @mask: mask of signals to set
* @bits: bitmap of signal output values
*
* Assigns output values defined by @bits for the signals defined by @mask.
*/
void idio_16_set_multiple(struct idio_16 __iomem *const reg,
struct idio_16_state *const state,
const unsigned long *const mask,
const unsigned long *const bits)
{
unsigned long flags;
spin_lock_irqsave(&state->lock, flags);
bitmap_replace(state->out_state, state->out_state, bits, mask,
IDIO_16_NOUT);
if (*mask & GENMASK(7, 0))
iowrite8(bitmap_get_value8(state->out_state, 0), &reg->out0_7);
if (*mask & GENMASK(15, 8))
iowrite8(bitmap_get_value8(state->out_state, 8), &reg->out8_15);
spin_unlock_irqrestore(&state->lock, flags);
}
EXPORT_SYMBOL_GPL(idio_16_set_multiple);
/**
* idio_16_state_init - initialize idio_16_state structure
* @state: ACCES IDIO-16 device state
*
* Initializes the ACCES IDIO-16 device @state for use in idio-16 library
* functions.
*/
void idio_16_state_init(struct idio_16_state *const state)
{
spin_lock_init(&state->lock);
}
EXPORT_SYMBOL_GPL(idio_16_state_init);
MODULE_AUTHOR("William Breathitt Gray");
MODULE_DESCRIPTION("ACCES IDIO-16 GPIO Library");
MODULE_LICENSE("GPL");

65
drivers/gpio/gpio-idio-16.h
View File

@ -3,9 +3,6 @@
#ifndef _IDIO_16_H_
#define _IDIO_16_H_
#include <linux/spinlock.h>
#include <linux/types.h>
struct device;
struct regmap;
struct regmap_irq;
@ -30,68 +27,6 @@ struct idio_16_regmap_config {
bool filters;
};
/**
* struct idio_16 - IDIO-16 registers structure
* @out0_7: Read: FET Drive Outputs 0-7
* Write: FET Drive Outputs 0-7
* @in0_7: Read: Isolated Inputs 0-7
* Write: Clear Interrupt
* @irq_ctl: Read: Enable IRQ
* Write: Disable IRQ
* @filter_ctl: Read: Activate Input Filters 0-15
* Write: Deactivate Input Filters 0-15
* @out8_15: Read: FET Drive Outputs 8-15
* Write: FET Drive Outputs 8-15
* @in8_15: Read: Isolated Inputs 8-15
* Write: Unused
* @irq_status: Read: Interrupt status
* Write: Unused
*/
struct idio_16 {
u8 out0_7;
u8 in0_7;
u8 irq_ctl;
u8 filter_ctl;
u8 out8_15;
u8 in8_15;
u8 irq_status;
};
#define IDIO_16_NOUT 16
/**
* struct idio_16_state - IDIO-16 state structure
* @lock: synchronization lock for accessing device state
* @out_state: output signals state
*/
struct idio_16_state {
spinlock_t lock;
DECLARE_BITMAP(out_state, IDIO_16_NOUT);
};
/**
* idio_16_get_direction - get the I/O direction for a signal offset
* @offset: offset of signal to get direction
*
* Returns the signal direction (0=output, 1=input) for the signal at @offset.
*/
static inline int idio_16_get_direction(const unsigned long offset)
{
return (offset >= IDIO_16_NOUT) ? 1 : 0;
}
int idio_16_get(struct idio_16 __iomem *reg, struct idio_16_state *state,
unsigned long offset);
void idio_16_get_multiple(struct idio_16 __iomem *reg,
struct idio_16_state *state,
const unsigned long *mask, unsigned long *bits);
void idio_16_set(struct idio_16 __iomem *reg, struct idio_16_state *state,
unsigned long offset, unsigned long value);
void idio_16_set_multiple(struct idio_16 __iomem *reg,
struct idio_16_state *state,
const unsigned long *mask, const unsigned long *bits);
void idio_16_state_init(struct idio_16_state *state);
int devm_idio_16_regmap_register(struct device *dev, const struct idio_16_regmap_config *config);
#endif /* _IDIO_16_H_ */