diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-s3c2410.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 110 |
1 files changed, 32 insertions, 78 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 3f16f30edbd2..7245c81366be 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -163,11 +163,9 @@ static const struct of_device_id s3c24xx_i2c_match[] = { MODULE_DEVICE_TABLE(of, s3c24xx_i2c_match); #endif -/* s3c24xx_get_device_quirks - * +/* * Get controller type either from device tree or platform device variant. -*/ - + */ static inline kernel_ulong_t s3c24xx_get_device_quirks(struct platform_device *pdev) { if (pdev->dev.of_node) { @@ -179,12 +177,10 @@ static inline kernel_ulong_t s3c24xx_get_device_quirks(struct platform_device *p return platform_get_device_id(pdev)->driver_data; } -/* s3c24xx_i2c_master_complete - * - * complete the message and wake up the caller, using the given return code, +/* + * Complete the message and wake up the caller, using the given return code, * or zero to mean ok. -*/ - + */ static inline void s3c24xx_i2c_master_complete(struct s3c24xx_i2c *i2c, int ret) { dev_dbg(i2c->dev, "master_complete %d\n", ret); @@ -217,7 +213,6 @@ static inline void s3c24xx_i2c_enable_ack(struct s3c24xx_i2c *i2c) } /* irq enable/disable functions */ - static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c) { unsigned long tmp; @@ -251,11 +246,9 @@ static bool is_ack(struct s3c24xx_i2c *i2c) return false; } -/* s3c24xx_i2c_message_start - * +/* * put the start of a message onto the bus -*/ - + */ static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, struct i2c_msg *msg) { @@ -364,21 +357,17 @@ static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret) /* helper functions to determine the current state in the set of * messages we are sending */ -/* is_lastmsg() - * +/* * returns TRUE if the current message is the last in the set -*/ - + */ static inline int is_lastmsg(struct s3c24xx_i2c *i2c) { return i2c->msg_idx >= (i2c->msg_num - 1); } -/* is_msglast - * +/* * returns TRUE if we this is the last byte in the current message -*/ - + */ static inline int is_msglast(struct s3c24xx_i2c *i2c) { /* msg->len is always 1 for the first byte of smbus block read. @@ -390,21 +379,17 @@ static inline int is_msglast(struct s3c24xx_i2c *i2c) return i2c->msg_ptr == i2c->msg->len-1; } -/* is_msgend - * +/* * returns TRUE if we reached the end of the current message -*/ - + */ static inline int is_msgend(struct s3c24xx_i2c *i2c) { return i2c->msg_ptr >= i2c->msg->len; } -/* i2c_s3c_irq_nextbyte - * +/* * process an interrupt and work out what to do */ - static int i2c_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) { unsigned long tmp; @@ -568,11 +553,9 @@ static int i2c_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) return ret; } -/* s3c24xx_i2c_irq - * +/* * top level IRQ servicing routine -*/ - + */ static irqreturn_t s3c24xx_i2c_irq(int irqno, void *dev_id) { struct s3c24xx_i2c *i2c = dev_id; @@ -630,11 +613,9 @@ static inline void s3c24xx_i2c_disable_bus(struct s3c24xx_i2c *i2c) } -/* s3c24xx_i2c_set_master - * +/* * get the i2c bus for a master transaction -*/ - + */ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) { unsigned long iicstat; @@ -652,11 +633,9 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) return -ETIMEDOUT; } -/* s3c24xx_i2c_wait_idle - * +/* * wait for the i2c bus to become idle. -*/ - + */ static void s3c24xx_i2c_wait_idle(struct s3c24xx_i2c *i2c) { unsigned long iicstat; @@ -706,11 +685,9 @@ static void s3c24xx_i2c_wait_idle(struct s3c24xx_i2c *i2c) dev_warn(i2c->dev, "timeout waiting for bus idle\n"); } -/* s3c24xx_i2c_doxfer - * +/* * this starts an i2c transfer -*/ - + */ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int num) { @@ -771,12 +748,10 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, return ret; } -/* s3c24xx_i2c_xfer - * +/* * first port of call from the i2c bus code when an message needs * transferring across the i2c bus. -*/ - + */ static int s3c24xx_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { @@ -814,17 +789,14 @@ static u32 s3c24xx_i2c_func(struct i2c_adapter *adap) } /* i2c bus registration info */ - static const struct i2c_algorithm s3c24xx_i2c_algorithm = { .master_xfer = s3c24xx_i2c_xfer, .functionality = s3c24xx_i2c_func, }; -/* s3c24xx_i2c_calcdivisor - * +/* * return the divisor settings for a given frequency -*/ - + */ static int s3c24xx_i2c_calcdivisor(unsigned long clkin, unsigned int wanted, unsigned int *div1, unsigned int *divs) { @@ -850,13 +822,11 @@ static int s3c24xx_i2c_calcdivisor(unsigned long clkin, unsigned int wanted, return clkin / (calc_divs * calc_div1); } -/* s3c24xx_i2c_clockrate - * +/* * work out a divisor for the user requested frequency setting, * either by the requested frequency, or scanning the acceptable * range of frequencies until something is found -*/ - + */ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got) { struct s3c2410_platform_i2c *pdata = i2c->pdata; @@ -1028,11 +998,9 @@ static void s3c24xx_i2c_dt_gpio_free(struct s3c24xx_i2c *i2c) } #endif -/* s3c24xx_i2c_init - * +/* * initialise the controller, set the IO lines and frequency -*/ - + */ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) { struct s3c2410_platform_i2c *pdata; @@ -1068,11 +1036,9 @@ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) } #ifdef CONFIG_OF -/* s3c24xx_i2c_parse_dt - * +/* * Parse the device tree node and retreive the platform data. -*/ - + */ static void s3c24xx_i2c_parse_dt(struct device_node *np, struct s3c24xx_i2c *i2c) { @@ -1111,11 +1077,6 @@ s3c24xx_i2c_parse_dt(struct device_node *np, struct s3c24xx_i2c *i2c) } #endif -/* s3c24xx_i2c_probe - * - * called by the bus driver when a suitable device is found -*/ - static int s3c24xx_i2c_probe(struct platform_device *pdev) { struct s3c24xx_i2c *i2c; @@ -1258,11 +1219,6 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) return 0; } -/* s3c24xx_i2c_remove - * - * called when device is removed from the bus -*/ - static int s3c24xx_i2c_remove(struct platform_device *pdev) { struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); @@ -1326,8 +1282,6 @@ static const struct dev_pm_ops s3c24xx_i2c_dev_pm_ops = { #define S3C24XX_DEV_PM_OPS NULL #endif -/* device driver for platform bus bits */ - static struct platform_driver s3c24xx_i2c_driver = { .probe = s3c24xx_i2c_probe, .remove = s3c24xx_i2c_remove, |