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-rw-r--r--arch/arm/imx-common/Makefile52
-rw-r--r--arch/arm/imx-common/cmd_bmode.c119
-rw-r--r--arch/arm/imx-common/cpu.c140
-rw-r--r--arch/arm/imx-common/i2c-mxv7.c99
-rw-r--r--arch/arm/imx-common/iomux-v3.c70
-rw-r--r--arch/arm/imx-common/speed.c45
-rw-r--r--arch/arm/imx-common/timer.c149
7 files changed, 674 insertions, 0 deletions
diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
new file mode 100644
index 0000000000..b3e608e9db
--- /dev/null
+++ b/arch/arm/imx-common/Makefile
@@ -0,0 +1,52 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2011 Freescale Semiconductor, Inc.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)libimx-common.o
+
+ifeq ($(SOC),$(filter $(SOC),mx5 mx6))
+COBJS-y = iomux-v3.o timer.o cpu.o speed.o
+COBJS-$(CONFIG_I2C_MXC) += i2c-mxv7.o
+endif
+COBJS-$(CONFIG_CMD_BMODE) += cmd_bmode.o
+COBJS := $(sort $(COBJS-y))
+
+SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
+
+all: $(obj).depend $(LIB)
+
+$(LIB): $(OBJS)
+ $(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/imx-common/cmd_bmode.c b/arch/arm/imx-common/cmd_bmode.c
new file mode 100644
index 0000000000..02fe72ed7f
--- /dev/null
+++ b/arch/arm/imx-common/cmd_bmode.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2012 Boundary Devices Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/imx-common/boot_mode.h>
+#include <malloc.h>
+
+static const struct boot_mode *modes[2];
+
+static const struct boot_mode *search_modes(char *arg)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(modes); i++) {
+ const struct boot_mode *p = modes[i];
+ if (p) {
+ while (p->name) {
+ if (!strcmp(p->name, arg))
+ return p;
+ p++;
+ }
+ }
+ }
+ return NULL;
+}
+
+static int create_usage(char *dest)
+{
+ int i;
+ int size = 0;
+
+ for (i = 0; i < ARRAY_SIZE(modes); i++) {
+ const struct boot_mode *p = modes[i];
+ if (p) {
+ while (p->name) {
+ int len = strlen(p->name);
+ if (dest) {
+ memcpy(dest, p->name, len);
+ dest += len;
+ *dest++ = '|';
+ }
+ size += len + 1;
+ p++;
+ }
+ }
+ }
+ if (dest)
+ memcpy(dest - 1, " [noreset]", 11); /* include trailing 0 */
+ size += 10;
+ return size;
+}
+
+static int do_boot_mode(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ const struct boot_mode *p;
+ int reset_requested = 1;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ p = search_modes(argv[1]);
+ if (!p)
+ return CMD_RET_USAGE;
+ if (argc == 3) {
+ if (strcmp(argv[2], "noreset"))
+ return CMD_RET_USAGE;
+ reset_requested = 0;
+ }
+
+ boot_mode_apply(p->cfg_val);
+ if (reset_requested && p->cfg_val)
+ do_reset(NULL, 0, 0, NULL);
+ return 0;
+}
+
+U_BOOT_CMD(
+ bmode, 3, 0, do_boot_mode,
+ NULL,
+ "");
+
+void add_board_boot_modes(const struct boot_mode *p)
+{
+ int size;
+ char *dest;
+
+ if (__u_boot_cmd_bmode.usage) {
+ free(__u_boot_cmd_bmode.usage);
+ __u_boot_cmd_bmode.usage = NULL;
+ }
+
+ modes[0] = p;
+ modes[1] = soc_boot_modes;
+ size = create_usage(NULL);
+ dest = malloc(size);
+ if (dest) {
+ create_usage(dest);
+ __u_boot_cmd_bmode.usage = dest;
+ }
+}
diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c
new file mode 100644
index 0000000000..fa1d468041
--- /dev/null
+++ b/arch/arm/imx-common/cpu.c
@@ -0,0 +1,140 @@
+/*
+ * (C) Copyright 2007
+ * Sascha Hauer, Pengutronix
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/crm_regs.h>
+
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+#endif
+
+char *get_reset_cause(void)
+{
+ u32 cause;
+ struct src *src_regs = (struct src *)SRC_BASE_ADDR;
+
+ cause = readl(&src_regs->srsr);
+ writel(cause, &src_regs->srsr);
+
+ switch (cause) {
+ case 0x00001:
+ case 0x00011:
+ return "POR";
+ case 0x00004:
+ return "CSU";
+ case 0x00008:
+ return "IPP USER";
+ case 0x00010:
+ return "WDOG";
+ case 0x00020:
+ return "JTAG HIGH-Z";
+ case 0x00040:
+ return "JTAG SW";
+ case 0x10000:
+ return "WARM BOOT";
+ default:
+ return "unknown reset";
+ }
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+
+static const char *get_imx_type(u32 imxtype)
+{
+ switch (imxtype) {
+ case 0x63:
+ return "6Q"; /* Quad-core version of the mx6 */
+ case 0x61:
+ return "6DS"; /* Dual/Solo version of the mx6 */
+ case 0x60:
+ return "6SL"; /* Solo-Lite version of the mx6 */
+ case 0x51:
+ return "51";
+ case 0x53:
+ return "53";
+ default:
+ return "??";
+ }
+}
+
+int print_cpuinfo(void)
+{
+ u32 cpurev;
+
+ cpurev = get_cpu_rev();
+
+ printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
+ get_imx_type((cpurev & 0xFF000) >> 12),
+ (cpurev & 0x000F0) >> 4,
+ (cpurev & 0x0000F) >> 0,
+ mxc_get_clock(MXC_ARM_CLK) / 1000000);
+ printf("Reset cause: %s\n", get_reset_cause());
+ return 0;
+}
+#endif
+
+int cpu_eth_init(bd_t *bis)
+{
+ int rc = -ENODEV;
+
+#if defined(CONFIG_FEC_MXC)
+ rc = fecmxc_initialize(bis);
+#endif
+
+ return rc;
+}
+
+#ifdef CONFIG_FSL_ESDHC
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+ return fsl_esdhc_mmc_init(bis);
+}
+#endif
+
+void reset_cpu(ulong addr)
+{
+ __raw_writew(4, WDOG1_BASE_ADDR);
+}
+
+u32 get_ahb_clk(void)
+{
+ struct mxc_ccm_reg *imx_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+ u32 reg, ahb_podf;
+
+ reg = __raw_readl(&imx_ccm->cbcdr);
+ reg &= MXC_CCM_CBCDR_AHB_PODF_MASK;
+ ahb_podf = reg >> MXC_CCM_CBCDR_AHB_PODF_OFFSET;
+
+ return get_periph_clk() / (ahb_podf + 1);
+}
diff --git a/arch/arm/imx-common/i2c-mxv7.c b/arch/arm/imx-common/i2c-mxv7.c
new file mode 100644
index 0000000000..da2b26f43f
--- /dev/null
+++ b/arch/arm/imx-common/i2c-mxv7.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2012 Boundary Devices Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/errno.h>
+#include <asm/gpio.h>
+#include <asm/imx-common/mxc_i2c.h>
+#include <watchdog.h>
+
+static int force_idle_bus(void *priv)
+{
+ int i;
+ int sda, scl;
+ ulong elapsed, start_time;
+ struct i2c_pads_info *p = (struct i2c_pads_info *)priv;
+ int ret = 0;
+
+ gpio_direction_input(p->sda.gp);
+ gpio_direction_input(p->scl.gp);
+
+ imx_iomux_v3_setup_pad(p->sda.gpio_mode);
+ imx_iomux_v3_setup_pad(p->scl.gpio_mode);
+
+ sda = gpio_get_value(p->sda.gp);
+ scl = gpio_get_value(p->scl.gp);
+ if ((sda & scl) == 1)
+ goto exit; /* Bus is idle already */
+
+ printf("%s: sda=%d scl=%d sda.gp=0x%x scl.gp=0x%x\n", __func__,
+ sda, scl, p->sda.gp, p->scl.gp);
+ /* Send high and low on the SCL line */
+ for (i = 0; i < 9; i++) {
+ gpio_direction_output(p->scl.gp, 0);
+ udelay(50);
+ gpio_direction_input(p->scl.gp);
+ udelay(50);
+ }
+ start_time = get_timer(0);
+ for (;;) {
+ sda = gpio_get_value(p->sda.gp);
+ scl = gpio_get_value(p->scl.gp);
+ if ((sda & scl) == 1)
+ break;
+ WATCHDOG_RESET();
+ elapsed = get_timer(start_time);
+ if (elapsed > (CONFIG_SYS_HZ / 5)) { /* .2 seconds */
+ ret = -EBUSY;
+ printf("%s: failed to clear bus, sda=%d scl=%d\n",
+ __func__, sda, scl);
+ break;
+ }
+ }
+exit:
+ imx_iomux_v3_setup_pad(p->sda.i2c_mode);
+ imx_iomux_v3_setup_pad(p->scl.i2c_mode);
+ return ret;
+}
+
+static void * const i2c_bases[] = {
+ (void *)I2C1_BASE_ADDR,
+ (void *)I2C2_BASE_ADDR,
+#ifdef I2C3_BASE_ADDR
+ (void *)I2C3_BASE_ADDR,
+#endif
+};
+
+/* i2c_index can be from 0 - 2 */
+void setup_i2c(unsigned i2c_index, int speed, int slave_addr,
+ struct i2c_pads_info *p)
+{
+ if (i2c_index >= ARRAY_SIZE(i2c_bases))
+ return;
+ /* Enable i2c clock */
+ enable_i2c_clk(1, i2c_index);
+ /* Make sure bus is idle */
+ force_idle_bus(p);
+ bus_i2c_init(i2c_bases[i2c_index], speed, slave_addr,
+ force_idle_bus, p);
+}
diff --git a/arch/arm/imx-common/iomux-v3.c b/arch/arm/imx-common/iomux-v3.c
new file mode 100644
index 0000000000..da093fbe14
--- /dev/null
+++ b/arch/arm/imx-common/iomux-v3.c
@@ -0,0 +1,70 @@
+/*
+ * Based on the iomux-v3.c from Linux kernel:
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ * <armlinux@phytec.de>
+ *
+ * Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/imx-common/iomux-v3.h>
+
+static void *base = (void *)IOMUXC_BASE_ADDR;
+
+/*
+ * configures a single pad in the iomuxer
+ */
+int imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
+{
+ u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
+ u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
+ u32 sel_input_ofs =
+ (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
+ u32 sel_input =
+ (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
+ u32 pad_ctrl_ofs =
+ (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
+ u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
+
+ if (mux_ctrl_ofs)
+ __raw_writel(mux_mode, base + mux_ctrl_ofs);
+
+ if (sel_input_ofs)
+ __raw_writel(sel_input, base + sel_input_ofs);
+
+ if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
+ __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
+
+ return 0;
+}
+
+int imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count)
+{
+ iomux_v3_cfg_t *p = pad_list;
+ int i;
+ int ret;
+
+ for (i = 0; i < count; i++) {
+ ret = imx_iomux_v3_setup_pad(*p);
+ if (ret)
+ return ret;
+ p++;
+ }
+ return 0;
+}
diff --git a/arch/arm/imx-common/speed.c b/arch/arm/imx-common/speed.c
new file mode 100644
index 0000000000..80989c4983
--- /dev/null
+++ b/arch/arm/imx-common/speed.c
@@ -0,0 +1,45 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+
+#ifdef CONFIG_FSL_ESDHC
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+int get_clocks(void)
+{
+#ifdef CONFIG_FSL_ESDHC
+#ifdef CONFIG_FSL_USDHC
+ gd->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+#else
+ gd->sdhc_clk = mxc_get_clock(MXC_IPG_PERCLK);
+#endif
+#endif
+ return 0;
+}
diff --git a/arch/arm/imx-common/timer.c b/arch/arm/imx-common/timer.c
new file mode 100644
index 0000000000..e2725e1a64
--- /dev/null
+++ b/arch/arm/imx-common/timer.c
@@ -0,0 +1,149 @@
+/*
+ * (C) Copyright 2007
+ * Sascha Hauer, Pengutronix
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <div64.h>
+#include <asm/arch/imx-regs.h>
+
+/* General purpose timers registers */
+struct mxc_gpt {
+ unsigned int control;
+ unsigned int prescaler;
+ unsigned int status;
+ unsigned int nouse[6];
+ unsigned int counter;
+};
+
+static struct mxc_gpt *cur_gpt = (struct mxc_gpt *)GPT1_BASE_ADDR;
+
+/* General purpose timers bitfields */
+#define GPTCR_SWR (1 << 15) /* Software reset */
+#define GPTCR_FRR (1 << 9) /* Freerun / restart */
+#define GPTCR_CLKSOURCE_32 (4 << 6) /* Clock source */
+#define GPTCR_TEN 1 /* Timer enable */
+#define CLK_32KHZ 32768 /* 32Khz input */
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define timestamp (gd->tbl)
+#define lastinc (gd->lastinc)
+
+static inline unsigned long long tick_to_time(unsigned long long tick)
+{
+ tick *= CONFIG_SYS_HZ;
+ do_div(tick, CLK_32KHZ);
+
+ return tick;
+}
+
+static inline unsigned long long us_to_tick(unsigned long long usec)
+{
+ usec = usec * CLK_32KHZ + 999999;
+ do_div(usec, 1000000);
+
+ return usec;
+}
+
+int timer_init(void)
+{
+ int i;
+ ulong val;
+
+ /* setup GP Timer 1 */
+ __raw_writel(GPTCR_SWR, &cur_gpt->control);
+
+ /* We have no udelay by now */
+ for (i = 0; i < 100; i++)
+ __raw_writel(0, &cur_gpt->control);
+
+ __raw_writel(0, &cur_gpt->prescaler); /* 32Khz */
+
+ /* Freerun Mode, PERCLK1 input */
+ i = __raw_readl(&cur_gpt->control);
+ __raw_writel(i | GPTCR_CLKSOURCE_32 | GPTCR_TEN, &cur_gpt->control);
+
+ val = __raw_readl(&cur_gpt->counter);
+ lastinc = val / (CLK_32KHZ / CONFIG_SYS_HZ);
+ timestamp = 0;
+
+ return 0;
+}
+
+unsigned long long get_ticks(void)
+{
+ ulong now = __raw_readl(&cur_gpt->counter); /* current tick value */
+
+ if (now >= lastinc) {
+ /*
+ * normal mode (non roll)
+ * move stamp forward with absolut diff ticks
+ */
+ timestamp += (now - lastinc);
+ } else {
+ /* we have rollover of incrementer */
+ timestamp += (0xFFFFFFFF - lastinc) + now;
+ }
+ lastinc = now;
+ return timestamp;
+}
+
+ulong get_timer_masked(void)
+{
+ /*
+ * get_ticks() returns a long long (64 bit), it wraps in
+ * 2^64 / CONFIG_MX25_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
+ * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in
+ * 5 * 10^6 days - long enough.
+ */
+ return tick_to_time(get_ticks());
+}
+
+ulong get_timer(ulong base)
+{
+ return get_timer_masked() - base;
+}
+
+/* delay x useconds AND preserve advance timstamp value */
+void __udelay(unsigned long usec)
+{
+ unsigned long long tmp;
+ ulong tmo;
+
+ tmo = us_to_tick(usec);
+ tmp = get_ticks() + tmo; /* get current timestamp */
+
+ while (get_ticks() < tmp) /* loop till event */
+ /*NOP*/;
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk(void)
+{
+ return CLK_32KHZ;
+}
generated by cgit (git 2.34.1) at 2024-12-25 01:38:30 +0000