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i2c: ocores: refactor setup for polling

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By properly setting up the algorithm at probe time, we can skip the
check at every transfer. This allows us to get rid of the flags
completely.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2019-04-03 14:40:15 +02:00 committed by Wolfram Sang
parent 08960b022f
commit dd7dbf0eb0
1 changed files with 4 additions and 11 deletions
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15
drivers/i2c/busses/i2c-ocores.c
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@ -26,8 +26,6 @@
#include <linux/spinlock.h>
#include <linux/jiffies.h>
#define OCORES_FLAG_POLL BIT(0)
/*
* 'process_lock' exists because ocores_process() and ocores_process_timeout()
* can't run in parallel.
@ -37,7 +35,6 @@ struct ocores_i2c {
int iobase;
u32 reg_shift;
u32 reg_io_width;
unsigned long flags;
wait_queue_head_t wait;
struct i2c_adapter adap;
struct i2c_msg *msg;
@ -403,11 +400,7 @@ static int ocores_xfer_polling(struct i2c_adapter *adap,
static int ocores_xfer(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
{
struct ocores_i2c *i2c = i2c_get_adapdata(adap);
if (i2c->flags & OCORES_FLAG_POLL)
return ocores_xfer_polling(adap, msgs, num);
return ocores_xfer_core(i2c, msgs, num, false);
return ocores_xfer_core(i2c_get_adapdata(adap), msgs, num, false);
}
static int ocores_init(struct device *dev, struct ocores_i2c *i2c)
@ -447,7 +440,7 @@ static u32 ocores_func(struct i2c_adapter *adap)
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm ocores_algorithm = {
static struct i2c_algorithm ocores_algorithm = {
.master_xfer = ocores_xfer,
.functionality = ocores_func,
};
@ -673,13 +666,13 @@ static int ocores_i2c_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq == -ENXIO) {
i2c->flags |= OCORES_FLAG_POLL;
ocores_algorithm.master_xfer = ocores_xfer_polling;
} else {
if (irq < 0)
return irq;
}
if (!(i2c->flags & OCORES_FLAG_POLL)) {
if (ocores_algorithm.master_xfer != ocores_xfer_polling) {
ret = devm_request_irq(&pdev->dev, irq, ocores_isr, 0,
pdev->name, i2c);
if (ret) {