[PATCH v7 14/15] ARM: mxs: Add initial mx28evk support
Shawn Guo
shawn.guo at freescale.com
Sat Dec 18 08:39:35 EST 2010
Add initial mx28evk support with duart and fec0.
Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
---
Changes for v7:
- Define mx28evk pads using naked pad "OR" mA/vol/pull configurations
Changes for v3:
- Remove inclusion of hardware.h
- Add __initconst for mx28evk_pads[]
Changes for v2:
- Change function mx28evk_fec_reset() from inline to __init
- Enable pll2 clock before phy operation
- Add error checking for gpio_direction_output()
- Save bytes by passing parameter into pr_err format string
- Change mx28_add_fec0() to mx28_add_fec(0)
- Remove boot_params
arch/arm/mach-mxs/mach-mx28evk.c | 138 ++++++++++++++++++++++++++++++++++++++
1 files changed, 138 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-mxs/mach-mx28evk.c
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
new file mode 100644
index 0000000..d162e95
--- /dev/null
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include <mach/common.h>
+#include <mach/iomux-mx28.h>
+
+#include "devices-mx28.h"
+#include "gpio.h"
+
+#define MX28EVK_FEC_PHY_POWER MXS_GPIO_NR(2, 15)
+#define MX28EVK_FEC_PHY_RESET MXS_GPIO_NR(4, 13)
+
+static const iomux_cfg_t mx28evk_pads[] __initconst = {
+ /* duart */
+ MX28_PAD_PWM0__DUART_RX |
+ (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+ MX28_PAD_PWM1__DUART_TX |
+ (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+
+ /* fec0 */
+ MX28_PAD_ENET0_MDC__ENET0_MDC |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_MDIO__ENET0_MDIO |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_RX_EN__ENET0_RX_EN |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_RXD0__ENET0_RXD0 |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_RXD1__ENET0_RXD1 |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_TX_EN__ENET0_TX_EN |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_TXD0__ENET0_TXD0 |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET0_TXD1__ENET0_TXD1 |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ MX28_PAD_ENET_CLK__CLKCTRL_ENET |
+ (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+ /* phy power line */
+ MX28_PAD_SSP1_DATA3__GPIO_2_15 |
+ (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+ /* phy reset line */
+ MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
+ (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+};
+
+/* fec */
+static void __init mx28evk_fec_reset(void)
+{
+ int ret;
+ struct clk *clk;
+
+ /* Enable fec phy clock */
+ clk = clk_get_sys("pll2", NULL);
+ if (!IS_ERR(clk))
+ clk_enable(clk);
+
+ /* Power up fec phy */
+ ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
+ if (ret) {
+ pr_err("Failed to request gpio fec-phy-%s: %d\n", "power", ret);
+ return;
+ }
+
+ ret = gpio_direction_output(MX28EVK_FEC_PHY_POWER, 0);
+ if (ret) {
+ pr_err("Failed to drive gpio fec-phy-%s: %d\n", "power", ret);
+ return;
+ }
+
+ /* Reset fec phy */
+ ret = gpio_request(MX28EVK_FEC_PHY_RESET, "fec-phy-reset");
+ if (ret) {
+ pr_err("Failed to request gpio fec-phy-%s: %d\n", "reset", ret);
+ return;
+ }
+
+ gpio_direction_output(MX28EVK_FEC_PHY_RESET, 0);
+ if (ret) {
+ pr_err("Failed to drive gpio fec-phy-%s: %d\n", "reset", ret);
+ return;
+ }
+
+ mdelay(1);
+ gpio_set_value(MX28EVK_FEC_PHY_RESET, 1);
+}
+
+static const struct fec_platform_data mx28_fec_pdata __initconst = {
+ .phy = PHY_INTERFACE_MODE_RMII,
+};
+
+static void __init mx28evk_init(void)
+{
+ mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
+
+ mx28_add_duart();
+
+ mx28evk_fec_reset();
+ mx28_add_fec(0, &mx28_fec_pdata);
+}
+
+static void __init mx28evk_timer_init(void)
+{
+ mx28_clocks_init();
+}
+
+static struct sys_timer mx28evk_timer = {
+ .init = mx28evk_timer_init,
+};
+
+MACHINE_START(MX28EVK, "Freescale MX28 EVK")
+ /* Maintainer: Freescale Semiconductor, Inc. */
+ .map_io = mx28_map_io,
+ .init_irq = mx28_init_irq,
+ .init_machine = mx28evk_init,
+ .timer = &mx28evk_timer,
+MACHINE_END
--
1.7.1
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