diff options
| -rw-r--r-- | arch/arm/boot/dts/imx28-tx28.dts | 21 | ||||
| -rw-r--r-- | arch/arm/mach-mxs/mach-mxs.c | 82 |
2 files changed, 101 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/imx28-tx28.dts b/arch/arm/boot/dts/imx28-tx28.dts index 62bf767..a56ae05 100644 --- a/arch/arm/boot/dts/imx28-tx28.dts +++ b/arch/arm/boot/dts/imx28-tx28.dts @@ -34,6 +34,24 @@ fsl,voltage = <1>; fsl,pull-up = <0>; }; + + mac0_pins_gpio: mac0-gpio-mode@0 { + reg = <0>; + fsl,pinmux-ids = < + 0x4003 /* MX28_PAD_ENET0_MDC__GPIO_4_0 */ + 0x4013 /* MX28_PAD_ENET0_MDIO__GPIO_4_1 */ + 0x4023 /* MX28_PAD_ENET0_RX_EN__GPIO_4_2 */ + 0x4033 /* MX28_PAD_ENET0_RXD0__GPIO_4_3 */ + 0x4043 /* MX28_PAD_ENET0_RXD1__GPIO_4_4 */ + 0x4063 /* MX28_PAD_ENET0_TX_EN__GPIO_4_6 */ + 0x4073 /* MX28_PAD_ENET0_TXD0__GPIO_4_7 */ + 0x4083 /* MX28_PAD_ENET0_TXD1__GPIO_4_8 */ + 0x4103 /* MX28_PAD_ENET_CLK__GPIO_4_16 */ + >; + fsl,drive-strength = <0>; + fsl,voltage = <1>; + fsl,pull-up = <0>; + }; }; }; @@ -72,8 +90,9 @@ ahb@80080000 { mac0: ethernet@800f0000 { phy-mode = "rmii"; - pinctrl-names = "default"; + pinctrl-names = "default", "gpio_mode"; pinctrl-0 = <&mac0_pins_a>; + pinctrl-1 = <&mac0_pins_gpio>; status = "okay"; }; }; diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c index ceb7398..8378fe5 100644 --- a/arch/arm/mach-mxs/mach-mxs.c +++ b/arch/arm/mach-mxs/mach-mxs.c @@ -12,8 +12,9 @@ #include <linux/clk.h> #include <linux/clkdev.h> +#include <linux/delay.h> #include <linux/err.h> -#include <linux/init.h> +#include <linux/gpio.h> #include <linux/init.h> #include <linux/irqdomain.h> #include <linux/micrel_phy.h> @@ -21,10 +22,12 @@ #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/phy.h> +#include <linux/pinctrl/consumer.h> #include <asm/mach/arch.h> #include <asm/mach/time.h> #include <mach/common.h> #include <mach/digctl.h> +#include <mach/mxs.h> static struct fb_videomode mx23evk_video_modes[] = { { @@ -273,6 +276,80 @@ static void __init apx4devkit_init(void) mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT; } +#define ENET0_MDC__GPIO_4_0 MXS_GPIO_NR(4, 0) +#define ENET0_MDIO__GPIO_4_1 MXS_GPIO_NR(4, 1) +#define ENET0_RX_EN__GPIO_4_2 MXS_GPIO_NR(4, 2) +#define ENET0_RXD0__GPIO_4_3 MXS_GPIO_NR(4, 3) +#define ENET0_RXD1__GPIO_4_4 MXS_GPIO_NR(4, 4) +#define ENET0_TX_EN__GPIO_4_6 MXS_GPIO_NR(4, 6) +#define ENET0_TXD0__GPIO_4_7 MXS_GPIO_NR(4, 7) +#define ENET0_TXD1__GPIO_4_8 MXS_GPIO_NR(4, 8) +#define ENET_CLK__GPIO_4_16 MXS_GPIO_NR(4, 16) + +#define TX28_FEC_PHY_POWER MXS_GPIO_NR(3, 29) +#define TX28_FEC_PHY_RESET MXS_GPIO_NR(4, 13) +#define TX28_FEC_nINT MXS_GPIO_NR(4, 5) + +static const struct gpio tx28_gpios[] __initconst = { + { ENET0_MDC__GPIO_4_0, GPIOF_OUT_INIT_LOW, "GPIO_4_0" }, + { ENET0_MDIO__GPIO_4_1, GPIOF_OUT_INIT_LOW, "GPIO_4_1" }, + { ENET0_RX_EN__GPIO_4_2, GPIOF_OUT_INIT_LOW, "GPIO_4_2" }, + { ENET0_RXD0__GPIO_4_3, GPIOF_OUT_INIT_LOW, "GPIO_4_3" }, + { ENET0_RXD1__GPIO_4_4, GPIOF_OUT_INIT_LOW, "GPIO_4_4" }, + { ENET0_TX_EN__GPIO_4_6, GPIOF_OUT_INIT_LOW, "GPIO_4_6" }, + { ENET0_TXD0__GPIO_4_7, GPIOF_OUT_INIT_LOW, "GPIO_4_7" }, + { ENET0_TXD1__GPIO_4_8, GPIOF_OUT_INIT_LOW, "GPIO_4_8" }, + { ENET_CLK__GPIO_4_16, GPIOF_OUT_INIT_LOW, "GPIO_4_16" }, + { TX28_FEC_PHY_POWER, GPIOF_OUT_INIT_LOW, "fec-phy-power" }, + { TX28_FEC_PHY_RESET, GPIOF_OUT_INIT_LOW, "fec-phy-reset" }, + { TX28_FEC_nINT, GPIOF_DIR_IN, "fec-int" }, +}; + +static void __init tx28_post_init(void) +{ + struct device_node *np; + struct platform_device *pdev; + struct pinctrl *pctl; + int ret; + + enable_clk_enet_out(); + + np = of_find_compatible_node(NULL, NULL, "fsl,imx28-fec"); + pdev = of_find_device_by_node(np); + if (!pdev) { + pr_err("%s: failed to find fec device\n", __func__); + return; + } + + pctl = pinctrl_get_select(&pdev->dev, "gpio_mode"); + if (IS_ERR(pctl)) { + pr_err("%s: failed to get pinctrl state\n", __func__); + return; + } + + ret = gpio_request_array(tx28_gpios, ARRAY_SIZE(tx28_gpios)); + if (ret) { + pr_err("%s: failed to request gpios: %d\n", __func__, ret); + return; + } + + /* Power up fec phy */ + gpio_set_value(TX28_FEC_PHY_POWER, 1); + msleep(26); /* 25ms according to data sheet */ + + /* Mode strap pins */ + gpio_set_value(ENET0_RX_EN__GPIO_4_2, 1); + gpio_set_value(ENET0_RXD0__GPIO_4_3, 1); + gpio_set_value(ENET0_RXD1__GPIO_4_4, 1); + + udelay(100); /* minimum assertion time for nRST */ + + /* Deasserting FEC PHY RESET */ + gpio_set_value(TX28_FEC_PHY_RESET, 1); + + pinctrl_put(pctl); +} + static void __init mxs_machine_init(void) { if (of_machine_is_compatible("fsl,imx28-evk")) @@ -286,6 +363,9 @@ static void __init mxs_machine_init(void) of_platform_populate(NULL, of_default_bus_match_table, mxs_auxdata_lookup, NULL); + + if (of_machine_is_compatible("karo,tx28")) + tx28_post_init(); } static const char *imx23_dt_compat[] __initdata = { |