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arm: am335x: add support for i2c2 bus 

The am335x from BeagleBone use i2c EEPROM to detect capes.
The memory is wired to i2c bus 2 therefore it need to be enabled.

Add i2c2 clock, pinmux description and pinmux enable function.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
This commit is contained in:
Kory Maincent 2021-05-04 19:31:29 +02:00 committed by Tom Rini
parent 77115a5526
commit d705527a89
4 changed files with 19 additions and 0 deletions
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1
arch/arm/mach-omap2/am33xx/clock_am33xx.c
View File

@ -220,6 +220,7 @@ void enable_basic_clocks(void)
&cmper->gpio2clkctrl,
&cmper->gpio3clkctrl,
&cmper->i2c1clkctrl,
&cmper->i2c2clkctrl,
&cmper->cpgmac0clkctrl,
&cmper->spi0clkctrl,
&cmrtc->rtcclkctrl,

2
board/ti/am335x/board.c
View File

@ -77,8 +77,10 @@ static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
void do_board_detect(void)
{
enable_i2c0_pin_mux();
enable_i2c2_pin_mux();
#if !CONFIG_IS_ENABLED(DM_I2C)
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED2, CONFIG_SYS_OMAP24_I2C_SLAVE2);
#endif
if (ti_i2c_eeprom_am_get(CONFIG_EEPROM_BUS_ADDRESS,
CONFIG_EEPROM_CHIP_ADDRESS))

1
board/ti/am335x/board.h
View File

@ -93,5 +93,6 @@ void enable_uart3_pin_mux(void);
void enable_uart4_pin_mux(void);
void enable_uart5_pin_mux(void);
void enable_i2c0_pin_mux(void);
void enable_i2c2_pin_mux(void);
void enable_board_pin_mux(void);
#endif

15
board/ti/am335x/mux.c
View File

@ -124,6 +124,14 @@ static struct module_pin_mux i2c1_pin_mux[] = {
{-1},
};
static struct module_pin_mux i2c2_pin_mux[] = {
{OFFSET(uart1_ctsn), (MODE(3) | RXACTIVE |
PULLUDEN | PULLUP_EN | SLEWCTRL)}, /* I2C_DATA */
{OFFSET(uart1_rtsn), (MODE(3) | RXACTIVE |
PULLUDEN | PULLUP_EN | SLEWCTRL)}, /* I2C_SCLK */
{-1},
};
static struct module_pin_mux spi0_pin_mux[] = {
{OFFSET(spi0_sclk), (MODE(0) | RXACTIVE | PULLUDEN)}, /* SPI0_SCLK */
{OFFSET(spi0_d0), (MODE(0) | RXACTIVE |
@ -308,6 +316,11 @@ void enable_i2c0_pin_mux(void)
configure_module_pin_mux(i2c0_pin_mux);
}
void enable_i2c2_pin_mux(void)
{
configure_module_pin_mux(i2c2_pin_mux);
}
/*
* The AM335x GP EVM, if daughter card(s) are connected, can have 8
* different profiles. These profiles determine what peripherals are
@ -367,6 +380,7 @@ void enable_board_pin_mux(void)
#else
configure_module_pin_mux(mmc1_pin_mux);
#endif
configure_module_pin_mux(i2c2_pin_mux);
} else if (board_is_gp_evm()) {
/* General Purpose EVM */
unsigned short profile = detect_daughter_board_profile();
@ -411,6 +425,7 @@ void enable_board_pin_mux(void)
#else
configure_module_pin_mux(mmc1_pin_mux);
#endif
configure_module_pin_mux(i2c2_pin_mux);
} else if (board_is_pb()) {
configure_module_pin_mux(mii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);