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path: root/drivers/gpio/gpio-idio-16.c
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Diffstat (limited to 'drivers/gpio/gpio-idio-16.c')
-rw-r--r--drivers/gpio/gpio-idio-16.c131
1 files changed, 1 insertions, 130 deletions
diff --git a/drivers/gpio/gpio-idio-16.c b/drivers/gpio/gpio-idio-16.c
index f9349e8d7fdc..53b1eb876a12 100644
--- a/drivers/gpio/gpio-idio-16.c
+++ b/drivers/gpio/gpio-idio-16.c
@@ -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");