[PATCH v5 09/10] arm: am335x: add support for i2c2 bus
Kory Maincent
kory.maincent at bootlin.com
Tue May 4 19:31:29 CEST 2021
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 at bootlin.com>
---
arch/arm/mach-omap2/am33xx/clock_am33xx.c | 1 +
board/ti/am335x/board.c | 2 ++
board/ti/am335x/board.h | 1 +
board/ti/am335x/mux.c | 15 +++++++++++++++
4 files changed, 19 insertions(+)
diff --git a/arch/arm/mach-omap2/am33xx/clock_am33xx.c b/arch/arm/mach-omap2/am33xx/clock_am33xx.c
index cf71192360..3a7ac60264 100644
--- a/arch/arm/mach-omap2/am33xx/clock_am33xx.c
+++ b/arch/arm/mach-omap2/am33xx/clock_am33xx.c
@@ -220,6 +220,7 @@ void enable_basic_clocks(void)
&cmper->gpio2clkctrl,
&cmper->gpio3clkctrl,
&cmper->i2c1clkctrl,
+ &cmper->i2c2clkctrl,
&cmper->cpgmac0clkctrl,
&cmper->spi0clkctrl,
&cmrtc->rtcclkctrl,
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index bc1657e88f..c7476b3a8c 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -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))
diff --git a/board/ti/am335x/board.h b/board/ti/am335x/board.h
index 48df914af9..c2962111c1 100644
--- a/board/ti/am335x/board.h
+++ b/board/ti/am335x/board.h
@@ -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
diff --git a/board/ti/am335x/mux.c b/board/ti/am335x/mux.c
index 03adcd2b76..e450ff64d8 100644
--- a/board/ti/am335x/mux.c
+++ b/board/ti/am335x/mux.c
@@ -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);
--
2.17.1
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