RTOS/rtems
1
0
Fork 0
forked from Imagelibrary/rtems
Code Pull Requests Activity

Fix beagle i2c file bbb-i2c.c comment issues

Browse Source
This commit is contained in:
Sichen Zhao
2017-06-15 19:35:20 +08:00
committed by Joel Sherrill
parent 8f550d2fa1
commit 369372c3ee
1 changed files with 23 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
c/src/lib/libbsp/arm/beagle/i2c/bbb-i2c.c
View File

@@ -7,6 +7,7 @@
*/
/*
* Copyright (c) 2016 Punit Vara <punitvara@gmail.com>
* Copyright (c) 2017 Sichen Zhao <zsc19940506@gmail.com>
*
* The license and distribution terms for this file may be
@@ -48,27 +49,26 @@ static void I2C0ModuleClkConfig( void )
AM335X_CM_WKUP_I2C0_CLKCTRL_MODULEMODE ) ) ;
/*
** Waiting for IDLEST field in AM335X_CM_WKUP_CONTROL_CLKCTRL
** register to attain
** desired value.
*/
* Waiting for IDLEST field in AM335X_CM_WKUP_CONTROL_CLKCTRL
* register to attain desired value.
*/
while ( ( AM335X_CM_WKUP_CONTROL_CLKCTRL_IDLEST_FUNC <<
AM335X_CM_WKUP_CONTROL_CLKCTRL_IDLEST_SHIFT ) !=
( REG( AM335X_SOC_CM_WKUP_REGS + AM335X_CM_WKUP_CONTROL_CLKCTRL ) &
AM335X_CM_WKUP_CONTROL_CLKCTRL_IDLEST ) ) ;
/*
** Waiting for CLKACTIVITY_I2C0_GFCLK field in AM335X_CM_WKUP_CLKSTCTRL
** register to attain desired value.
*/
* Waiting for CLKACTIVITY_I2C0_GFCLK field in AM335X_CM_WKUP_CLKSTCTRL
* register to attain desired value.
*/
while ( AM335X_CM_WKUP_CLKSTCTRL_CLKACTIVITY_I2C0_GFCLK !=
( REG( AM335X_SOC_CM_WKUP_REGS + AM335X_CM_WKUP_CLKSTCTRL ) &
AM335X_CM_WKUP_CLKSTCTRL_CLKACTIVITY_I2C0_GFCLK ) ) ;
/*
** Waiting for IDLEST field in AM335X_CM_WKUP_I2C0_CLKCTRL register to attain
** desired value.
*/
* Waiting for IDLEST field in AM335X_CM_WKUP_I2C0_CLKCTRL register to attain
* desired value.
*/
while ( ( AM335X_CM_WKUP_I2C0_CLKCTRL_IDLEST_FUNC <<
AM335X_CM_WKUP_I2C0_CLKCTRL_IDLEST_SHIFT ) !=
( REG( AM335X_SOC_CM_WKUP_REGS + AM335X_CM_WKUP_I2C0_CLKCTRL ) &
@@ -100,7 +100,7 @@ static void am335x_i2c_reset( bbb_i2c_bus *bus )
}
}
/*
Possible values for msg->flag
* Possible values for msg->flag
* - @ref I2C_M_TEN,
* - @ref I2C_M_RD,
* - @ref I2C_M_STOP,
@@ -116,13 +116,15 @@ static void am335x_i2c_set_address_size(
volatile bbb_i2c_regs *regs
)
{
/*can be configured multiple modes here.
**Need to think about own address modes*/
/*
* Can be configured multiple modes here.
* Need to think about own address modes
*/
if ( ( msgs->flags & I2C_M_TEN ) == 0 ) {
/* 7-bit mode slave address mode*/
/* 7-bit mode slave address mode */
REG( &regs->BBB_I2C_CON ) = AM335X_I2C_CFG_7BIT_SLAVE_ADDR;
} else {
/* 10-bit slave address mode*/
/* 10-bit slave address mode */
REG( &regs->BBB_I2C_CON ) = AM335X_I2C_CFG_10BIT_SLAVE_ADDR;
}
}
@@ -282,12 +284,14 @@ static void am335x_i2c_interrupt( void *arg )
{
bbb_i2c_bus *bus = arg;
volatile bbb_i2c_regs *regs = bus->regs;
/* get status of enabled interrupts */
/* Get status of enabled interrupts */
uint32_t irqstatus = REG( &regs->BBB_I2C_IRQSTATUS );
bool done = false;
/* Clear all enabled interrupt except receive ready
and transmit ready interrupt in status register */
/*
* Clear all enabled interrupt except receive ready
* and transmit ready interrupt in status register
*/
REG( &regs->BBB_I2C_IRQSTATUS ) =
( irqstatus & ~( AM335X_I2C_IRQSTATUS_RRDY |
AM335X_I2C_IRQSTATUS_XRDY ) );
@@ -417,7 +421,7 @@ int am335x_i2c_bus_register(
rtems_status_code sc;
int err;
/*check bus number is >0 & <MAX*/
/* Check bus number is >0 & <MAX */
bus = (bbb_i2c_bus *) i2c_bus_alloc_and_init( sizeof( *bus ) );
if ( bus == NULL ) {