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board: ti: am335x: Conditional MDIO PAD configuration instead of static for AM335_ICE

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This patch removes the static MDIO pinmux configuration from
rmii1_pin_mux[] and instead configures the MDIO pins conditionally
during board_init(). Previously, the MDIO_CLK and MDIO_DATA pins
were always configured for CPSW in mux.c, which could lead to
unnecessary pin ownership and conflicts in scenarios where CPSW
is not used.

With this change, the MDIO pins are configured only when required,
ensuring that CPSW Ethernet functionality in U-Boot remains unaffected.
This approach keeps Ethernet boot behavior intact and provides cleaner
separation between CPSW and other Ethernet use cases.

Reviewed-by: Markus Schneider-Pargmann (TI) <msp@baylibre.com>
Signed-off-by: Parvathi Pudi <parvathi@couthit.com>
This commit is contained in:
Parvathi Pudi
2026-05-07 11:53:49 +05:30
committed by Tom Rini
parent 4660602522
commit 55e767426e
2 changed files with 10 additions and 2 deletions
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10
board/ti/am335x/board.c
View File

@@ -28,6 +28,7 @@
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mem.h>
#include <asm/arch/mux.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/emif.h>
@@ -72,6 +73,12 @@ static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
#define GPIO0_IRQSTATUSRAW (AM33XX_GPIO0_BASE + 0x024)
#define GPIO1_IRQSTATUSRAW (AM33XX_GPIO1_BASE + 0x024)
static __maybe_unused struct module_pin_mux rmii1_mdio_pin_mux[] = {
{OFFSET(mdio_clk), MODE(0) | PULLUP_EN}, /* MDIO_CLK */
{OFFSET(mdio_data), MODE(0) | RXACTIVE | PULLUP_EN}, /* MDIO_DATA */
{-1},
};
/*
* Read header information from EEPROM into global structure.
*/
@@ -779,6 +786,9 @@ int board_init(void)
hang();
}
if (!eth0_is_mii)
configure_module_pin_mux(rmii1_mdio_pin_mux);
prueth_is_mii = eth0_is_mii;
/* disable rising edge IRQs */

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

@@ -190,8 +190,6 @@ static struct module_pin_mux mii1_pin_mux[] = {
};
static struct module_pin_mux rmii1_pin_mux[] = {
{OFFSET(mdio_clk), MODE(0) | PULLUP_EN}, /* MDIO_CLK */
{OFFSET(mdio_data), MODE(0) | RXACTIVE | PULLUP_EN}, /* MDIO_DATA */
{OFFSET(mii1_crs), MODE(1) | RXACTIVE}, /* MII1_CRS */
{OFFSET(mii1_rxerr), MODE(1) | RXACTIVE}, /* MII1_RXERR */
{OFFSET(mii1_txen), MODE(1)}, /* MII1_TXEN */