armv7: Add support for ST-Ericsson U8500 href platform

Minimal platform support to boot linux from SD.

Supported devices/hw limited to external MMC/SD slot,
GPIO, I2C and minimal PRCMU.

Signed-off-by: John Rigby <john.rigby@linaro.org>
CC: Albert Aribaud <albert.aribaud@free.fr>

1 files changed, 546 insertions, 0 deletions

diff --git a/board/st-ericsson/u8500/u8500_href.c b/board/st-ericsson/u8500/u8500_href.c
new file mode 100644
index 000000000..525633e86
--- /dev/null
+++ b/board/st-ericsson/u8500/u8500_href.c
@@ -0,0 +1,546 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2009
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <i2c.h>
+#include <asm/types.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#ifdef CONFIG_MMC
+#include "../../../drivers/mmc/arm_pl180_mmci.h"
+#endif
+
+#define NOMADIK_PER4_BASE	(0x80150000)
+#define NOMADIK_BACKUPRAM0_BASE (NOMADIK_PER4_BASE + 0x00000)
+#define NOMADIK_BACKUPRAM1_BASE (NOMADIK_PER4_BASE + 0x01000)
+
+/* Power, Reset, Clock Management Unit */
+/*
+ * SVA: Smart Video Accelerator
+ * SIA: Smart Imaging Accelerator
+ * SGA: Smart Graphic accelerator
+ * B2R2: Graphic blitter
+ */
+#define PRCMU_BASE	CFG_PRCMU_BASE	/* 0x80157000 for U8500 */
+#define PRCM_ARMCLKFIX_MGT_REG		(PRCMU_BASE + 0x000)
+#define PRCM_ACLK_MGT_REG		(PRCMU_BASE + 0x004)
+#define PRCM_SVAMMDSPCLK_MGT_REG	(PRCMU_BASE + 0x008)
+#define PRCM_SIAMMDSPCLK_MGT_REG	(PRCMU_BASE + 0x00C)
+#define PRCM_SAAMMDSPCLK_MGT_REG	(PRCMU_BASE + 0x010)
+#define PRCM_SGACLK_MGT_REG		(PRCMU_BASE + 0x014)
+#define PRCM_UARTCLK_MGT_REG		(PRCMU_BASE + 0x018)
+#define PRCM_MSPCLK_MGT_REG		(PRCMU_BASE + 0x01C)
+#define PRCM_I2CCLK_MGT_REG		(PRCMU_BASE + 0x020)
+#define PRCM_SDMMCCLK_MGT_REG		(PRCMU_BASE + 0x024)
+#define PRCM_SLIMCLK_MGT_REG		(PRCMU_BASE + 0x028)
+#define PRCM_PER1CLK_MGT_REG		(PRCMU_BASE + 0x02C)
+#define PRCM_PER2CLK_MGT_REG		(PRCMU_BASE + 0x030)
+#define PRCM_PER3CLK_MGT_REG		(PRCMU_BASE + 0x034)
+#define PRCM_PER5CLK_MGT_REG		(PRCMU_BASE + 0x038)
+#define PRCM_PER6CLK_MGT_REG		(PRCMU_BASE + 0x03C)
+#define PRCM_PER7CLK_MGT_REG		(PRCMU_BASE + 0x040)
+#define PRCM_DMACLK_MGT_REG		(PRCMU_BASE + 0x074)
+#define PRCM_B2R2CLK_MGT_REG		(PRCMU_BASE + 0x078)
+
+#define PRCM_PLLSOC0_FREQ_REG		(PRCMU_BASE + 0x080)
+#define PRCM_PLLSOC1_FREQ_REG		(PRCMU_BASE + 0x084)
+#define PRCM_PLLARM_FREQ_REG		(PRCMU_BASE + 0x088)
+#define PRCM_PLLDDR_FREQ_REG		(PRCMU_BASE + 0x08C)
+#define PRCM_ARM_CHGCLKREQ_REG		(PRCMU_BASE + 0x114)
+
+#define PRCM_TCR			(PRCMU_BASE + 0x1C8)
+
+/*
+ * Memory controller register
+ */
+#define DMC_BASE_ADDR			0x80156000
+#define DMC_CTL_97			(DMC_BASE_ADDR + 0x184)
+
+int board_id;	/* set in board_late_init() */
+
+/* PLLs for clock management registers */
+enum {
+	GATED = 0,
+	PLLSOC0,	/* pllsw = 001, ffs() = 1 */
+	PLLSOC1,	/* pllsw = 010, ffs() = 2 */
+	PLLDDR,		/* pllsw = 100, ffs() = 3 */
+	PLLARM,
+};
+
+static struct pll_freq_regs {
+	int idx;	/* index fror pll_name and pll_khz arrays */
+	uint32_t addr;
+} pll_freq_regs[] = {
+	{PLLSOC0, PRCM_PLLSOC0_FREQ_REG},
+	{PLLSOC1, PRCM_PLLSOC1_FREQ_REG},
+	{PLLDDR, PRCM_PLLDDR_FREQ_REG},
+	{PLLARM, PRCM_PLLARM_FREQ_REG},
+	{0, 0},
+};
+
+static const char *pll_name[5] = {"GATED", "SOC0", "SOC1", "DDR", "ARM"};
+static uint32_t pll_khz[5];	/* use ffs(pllsw(reg)) as index for 0..3 */
+
+static struct clk_mgt_regs {
+	uint32_t addr;
+	uint32_t val;
+	const char *descr;
+} clk_mgt_regs[] = {
+	/* register content taken from bootrom settings */
+	{PRCM_ARMCLKFIX_MGT_REG, 0x0120, "ARMCLKFIX"}, /* ena, SOC0/0, ??? */
+	{PRCM_ACLK_MGT_REG, 0x0125, "ACLK"},	/* ena, SOC0/5, 160 MHz */
+	{PRCM_SVAMMDSPCLK_MGT_REG, 0x1122, "SVA"}, /* ena, SOC0/2, 400 MHz */
+	{PRCM_SIAMMDSPCLK_MGT_REG, 0x0022, "SIA"}, /* dis, SOC0/2, 400 MHz */
+	{PRCM_SAAMMDSPCLK_MGT_REG, 0x0822, "SAA"}, /* dis, SOC0/4, 200 MHz */
+	{PRCM_SGACLK_MGT_REG, 0x0024, "SGA"},	/* dis, SOC0/4, 200 MHz */
+	{PRCM_UARTCLK_MGT_REG, 0x0300, "UART"},	/* ena, GATED, CLK38 */
+	{PRCM_MSPCLK_MGT_REG, 0x0200, "MSP"},	/* dis, GATED, CLK38 */
+	{PRCM_I2CCLK_MGT_REG, 0x0130, "I2C"},	/* ena, SOC0/16, 50 MHz */
+	{PRCM_SDMMCCLK_MGT_REG, 0x0130, "SDMMC"}, /* ena, SOC0/16, 50 MHz */
+	{PRCM_PER1CLK_MGT_REG, 0x126, "PER1"},	/* ena, SOC0/6, 133 MHz */
+	{PRCM_PER2CLK_MGT_REG, 0x126, "PER2"},	/* ena, SOC0/6, 133 MHz */
+	{PRCM_PER3CLK_MGT_REG, 0x126, "PER3"},	/* ena, SOC0/6, 133 MHz */
+	{PRCM_PER5CLK_MGT_REG, 0x126, "PER5"},	/* ena, SOC0/6, 133 MHz */
+	{PRCM_PER6CLK_MGT_REG, 0x126, "PER6"},	/* ena, SOC0/6, 133 MHz */
+	{PRCM_PER7CLK_MGT_REG, 0x128, "PER7"},	/* ena, SOC0/8, 100 MHz */
+	{PRCM_DMACLK_MGT_REG, 0x125, "DMA"},	/* ena, SOC0/5, 160 MHz */
+	{PRCM_B2R2CLK_MGT_REG, 0x025, "B2R2"},	/* dis, SOC0/5, 160 MHz */
+	{0, 0, NULL},
+};
+
+static void init_regs(void);
+
+DECLARE_GLOBAL_DATA_PTR;
+#if defined(CONFIG_SHOW_BOOT_PROGRESS)
+void show_boot_progress(int progress)
+{
+	printf("Boot reached stage %d\n", progress);
+}
+#endif
+
+static unsigned int read_asicid(void)
+{
+	unsigned int *address = (void *)U8500_BOOTROM_BASE
+				+ U8500_BOOTROM_ASIC_ID_OFFSET;
+	return readl(address);
+}
+
+int cpu_is_u8500v11(void)
+{
+	return read_asicid() == 0x008500A1;
+}
+
+/*
+ * Miscellaneous platform dependent initialisations
+ */
+
+int board_early_init_f(void)
+{
+	init_regs();
+	return 0;
+}
+
+int board_init(void)
+{
+	uint32_t unused_cols_rows;
+	unsigned int nrows;
+	unsigned int ncols;
+
+	gd->bd->bi_arch_number = 0x1A4;
+	gd->bd->bi_boot_params = 0x00000100;
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+
+	/*
+	 * Assumption: 2 CS active, both CS have same layout.
+	 *             15 rows max, 11 cols max (controller spec).
+	 *             memory chip has 8 banks, I/O width 32 bit.
+	 * The correct way would be to read MR#8: I/O width and density,
+	 * but this requires locking against the PRCMU firmware.
+	 * Simplified approach:
+	 * Read number of unused rows and columns from mem controller.
+	 * size = nCS x 2^(rows+cols) x nbanks x buswidth_bytes
+	 */
+	unused_cols_rows = readl(DMC_CTL_97);
+	nrows = 15 - (unused_cols_rows & 0x07);
+	ncols = 11 - ((unused_cols_rows & 0x0700) >> 8);
+	gd->bd->bi_dram[0].size = 2 * (1 << (nrows + ncols)) * 8 * 4;
+
+	icache_enable();
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = PHYS_SDRAM_SIZE_1;
+
+	return 0;
+}
+
+unsigned int addr_vall_arr[] = {
+	0x8011F000, 0x0000FFFF, /* Clocks for HSI TODO: Enable reqd only */
+	0x8011F008, 0x00001CFF, /* Clocks for HSI TODO: Enable reqd only */
+	0x8000F000, 0x00007FFF, /* Clocks for I2C TODO: Enable reqd only */
+	0x8000F008, 0x00007FFF, /* Clocks for I2C TODO: Enable reqd only */
+	0x80157020, 0x00000150, /* I2C 48MHz clock */
+	0x8012F000, 0x00007FFF, /* Clocks for SD TODO: Enable reqd only */
+	0x8012F008, 0x00007FFF, /* Clocks for SD TODO: Enable reqd only */
+	0xA03DF000, 0x0000000D, /* Clock for MTU Timers */
+	0x8011E00C, 0x00000000, /* GPIO ALT FUNC for EMMC */
+	0x8011E004, 0x0000FFE0, /* GPIO ALT FUNC for EMMC */
+	0x8011E020, 0x0000FFE0, /* GPIO ALT FUNC for EMMC */
+	0x8011E024, 0x00000000, /* GPIO ALT FUNC for EMMC */
+	0x8012E000, 0x20000000, /* GPIO ALT FUNC for UART */
+	0x8012E00C, 0x00000000, /* GPIO ALT FUNC for SD */
+	0x8012E004, 0x0FFC0000, /* GPIO ALT FUNC for SD */
+	0x8012E020, 0x60000000, /* GPIO ALT FUNC for SD */
+	0x8012E024, 0x60000000, /* GPIO ALT FUNC for SD */
+	0x801571E4, 0x0000000C, /* PRCMU settings for B2R2,
+				   PRCM_APE_RESETN_SET_REG */
+	0x80157024, 0x00000130, /* PRCMU settings for EMMC/SD */
+	0xA03FF000, 0x00000003, /* USB */
+	0xA03FF008, 0x00000001, /* USB */
+	0xA03FE00C, 0x00000000, /* USB */
+	0xA03FE020, 0x00000FFF, /* USB */
+	0xA03FE024, 0x00000000	/* USB */
+};
+
+#ifdef BOARD_LATE_INIT
+#ifdef CONFIG_MMC
+
+#define LDO_VAUX3_MASK		0x3
+#define LDO_VAUX3_ENABLE	0x1
+#define VAUX3_VOLTAGE_2_9V	0xd
+
+#define AB8500_REGU_CTRL2	0x4
+#define AB8500_REGU_VRF1VAUX3_REGU_REG	0x040A
+#define AB8500_REGU_VRF1VAUX3_SEL_REG	0x0421
+
+static int hrefplus_mmc_power_init(void)
+{
+	int ret;
+	int val;
+
+	if (!cpu_is_u8500v11())
+		return 0;
+
+	/*
+	 * On v1.1 HREF boards (HREF+), Vaux3 needs to be enabled for the SD
+	 * card to work.  This is done by enabling the regulators in the AB8500
+	 * via PRCMU I2C transactions.
+	 *
+	 * This code is derived from the handling of AB8500_LDO_VAUX3 in
+	 * ab8500_ldo_enable() and ab8500_ldo_disable() in Linux.
+	 *
+	 * Turn off and delay is required to have it work across soft reboots.
+	 */
+
+	ret = prcmu_i2c_read(AB8500_REGU_CTRL2, AB8500_REGU_VRF1VAUX3_REGU_REG);
+	if (ret < 0)
+		goto out;
+
+	val = ret;
+
+	/* Turn off */
+	ret = prcmu_i2c_write(AB8500_REGU_CTRL2, AB8500_REGU_VRF1VAUX3_REGU_REG,
+				val & ~LDO_VAUX3_MASK);
+	if (ret < 0)
+		goto out;
+
+	udelay(10 * 1000);
+
+	/* Set the voltage to 2.9V */
+	ret = prcmu_i2c_write(AB8500_REGU_CTRL2,
+				AB8500_REGU_VRF1VAUX3_SEL_REG,
+				VAUX3_VOLTAGE_2_9V);
+	if (ret < 0)
+		goto out;
+
+	val = val & ~LDO_VAUX3_MASK;
+	val = val | LDO_VAUX3_ENABLE;
+
+	/* Turn on the supply */
+	ret = prcmu_i2c_write(AB8500_REGU_CTRL2,
+				AB8500_REGU_VRF1VAUX3_REGU_REG, val);
+
+out:
+	return ret;
+}
+#endif
+/*
+ * called after all initialisation were done, but before the generic
+ * mmc_initialize().
+ */
+int board_late_init(void)
+{
+	uchar byte;
+
+	/*
+	 * Determine and set board_id environment variable
+	 * 0: mop500, 1: href500
+	 * Above boards have different GPIO expander chips which we can
+	 * distinguish by the chip id.
+	 *
+	 * The board_id environment variable is needed for the Linux bootargs.
+	 */
+	(void) i2c_set_bus_num(0);
+	(void) i2c_read(CONFIG_SYS_I2C_GPIOE_ADDR, 0x80, 1, &byte, 1);
+	if (byte == 0x01) {
+		board_id = 0;
+		setenv("board_id", "0");
+	} else {
+		board_id = 1;
+		setenv("board_id", "1");
+	}
+#ifdef CONFIG_MMC
+	hrefplus_mmc_power_init();
+
+	/*
+	 * config extended GPIO pins for level shifter and
+	 * SDMMC_ENABLE
+	 */
+	if (board_id == 0) {
+		/* MOP500 */
+		byte = 0x0c;
+		(void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0x89, 1, &byte, 1);
+		(void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0x83, 1, &byte, 1);
+	} else {
+		/* HREF */
+		/* set the direction of GPIO KPY9 and KPY10 */
+		byte = 0x06;
+		(void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0xC8, 1, &byte, 1);
+		/* must be a multibyte access */
+		(void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0xC4, 1,
+						(uchar []) {0x06, 0x06}, 2);
+	}
+#endif /* CONFIG_MMC */
+	/*
+	 * Create a memargs variable which points uses either the memargs256 or
+	 * memargs512 environment variable, depending on the memory size.
+	 * memargs is used to build the bootargs, memargs256 and memargs512 are
+	 * stored in the environment.
+	 */
+	if (gd->bd->bi_dram[0].size == 0x10000000) {
+		setenv("memargs", "setenv bootargs ${bootargs} ${memargs256}");
+		setenv("mem", "256M");
+	} else {
+		setenv("memargs", "setenv bootargs ${bootargs} ${memargs512}");
+		setenv("mem", "512M");
+	}
+
+	return 0;
+}
+#endif /* BOARD_LATE_INIT */
+
+static void early_gpio_setup(struct gpio_register *gpio_reg, u32 bits)
+{
+	writel(readl(&gpio_reg->gpio_dats) | bits, &gpio_reg->gpio_dats);
+	writel(readl(&gpio_reg->gpio_pdis) & ~bits, &gpio_reg->gpio_pdis);
+}
+
+static void init_regs(void)
+{
+	/* FIXME Remove magic register array settings for ED also */
+	struct prcmu *prcmu = (struct prcmu *) U8500_PRCMU_BASE;
+
+	/* Enable timers */
+	writel(1 << 17, &prcmu->tcr);
+
+	u8500_prcmu_enable(&prcmu->per1clk_mgt);
+	u8500_prcmu_enable(&prcmu->per2clk_mgt);
+	u8500_prcmu_enable(&prcmu->per3clk_mgt);
+	u8500_prcmu_enable(&prcmu->per5clk_mgt);
+	u8500_prcmu_enable(&prcmu->per6clk_mgt);
+	u8500_prcmu_enable(&prcmu->per7clk_mgt);
+
+	u8500_prcmu_enable(&prcmu->uartclk_mgt);
+	u8500_prcmu_enable(&prcmu->i2cclk_mgt);
+
+	u8500_prcmu_enable(&prcmu->sdmmcclk_mgt);
+
+	u8500_clock_enable(1, 9, -1);	/* GPIO0 */
+
+	u8500_clock_enable(2, 11, -1);	/* GPIO1 */
+
+	u8500_clock_enable(3, 8, -1);	/* GPIO2 */
+	u8500_clock_enable(5, 1, -1);	/* GPIO3 */
+
+	u8500_clock_enable(3, 6, 6);	/* UART2 */
+
+	gpio_altfuncenable(GPIO_ALT_I2C_0, "I2C0");
+	u8500_clock_enable(3, 3, 3);	/* I2C0 */
+
+	early_gpio_setup((struct gpio_register *)U8500_GPIO_0_BASE, 0x60000000);
+	gpio_altfuncenable(GPIO_ALT_UART_2, "UART2");
+
+	early_gpio_setup((struct gpio_register *)U8500_GPIO_6_BASE, 0x0000ffe0);
+	gpio_altfuncenable(GPIO_ALT_EMMC, "EMMC");
+
+	early_gpio_setup((struct gpio_register *)U8500_GPIO_0_BASE, 0x0000ffe0);
+	gpio_altfuncenable(GPIO_ALT_SD_CARD0, "SDCARD");
+
+	u8500_clock_enable(1, 5, 5);	/* SDI0 */
+	u8500_clock_enable(2, 4, 2);	/* SDI4 */
+
+	u8500_clock_enable(6, 7, -1);	/* MTU0 */
+	u8500_clock_enable(3, 4, 4);	/* SDI2 */
+
+	early_gpio_setup((struct gpio_register *)U8500_GPIO_4_BASE, 0x000007ff);
+	gpio_altfuncenable(GPIO_ALT_POP_EMMC, "EMMC");
+
+	/*
+	 * Enabling clocks for all devices which are AMBA devices in the
+	 * kernel.  Otherwise they will not get probe()'d because the
+	 * peripheral ID register will not be powered.
+	 */
+
+	/* XXX: some of these differ between ED/V1 */
+
+	u8500_clock_enable(1, 1, 1);	/* UART1 */
+	u8500_clock_enable(1, 0, 0);	/* UART0 */
+
+	u8500_clock_enable(3, 2, 2);	/* SSP1 */
+	u8500_clock_enable(3, 1, 1);	/* SSP0 */
+
+	u8500_clock_enable(2, 8, -1);	/* SPI0 */
+	u8500_clock_enable(2, 5, 3);	/* MSP2 */
+}
+
+#ifdef CONFIG_MMC
+static int u8500_mmci_board_init(void)
+{
+	enum gpio_error error;
+	struct gpio_register *gpio_base_address;
+
+	gpio_base_address = (void *)(U8500_GPIO_0_BASE);
+	gpio_base_address->gpio_dats |= 0xFFC0000;
+	gpio_base_address->gpio_pdis &= ~0xFFC0000;
+
+	/* save the GPIO0 AFSELA register */
+	error = gpio_altfuncenable(GPIO_ALT_SD_CARD0, "MMC");
+	if (error != GPIO_OK) {
+		printf("u8500_mmci_board_init() gpio_altfuncenable failed\n");
+		return -ENODEV;
+	}
+	return 0;
+}
+
+int board_mmc_init(bd_t *bd)
+{
+	if (u8500_mmci_board_init())
+		return -ENODEV;
+
+	if (arm_pl180_mmci_init())
+		return -ENODEV;
+	return 0;
+}
+#endif
+
+
+/*
+ * get_pll_freq_khz - return PLL frequency in kHz
+ */
+static uint32_t get_pll_freq_khz(uint32_t inclk_khz, uint32_t freq_reg)
+{
+	uint32_t idf, ldf, odf, seldiv, phi;
+
+	/*
+	 * PLLOUTCLK = PHI = (INCLK*LDF)/(2*ODF*IDF) if SELDIV2=0
+	 * PLLOUTCLK = PHI = (INCLK*LDF)/(4*ODF*IDF) if SELDIV2=1
+	 * where:
+	 * IDF=R(2:0) (when R=000, IDF=1d)
+	 * LDF = 2*D(7:0) (D must be greater than or equal to 6)
+	 * ODF = N(5:0) (when N=000000, 0DF=1d)
+	 */
+
+	idf = (freq_reg & 0x70000) >> 16;
+	ldf = (freq_reg & 0xff) * 2;
+	odf = (freq_reg & 0x3f00) >> 8;
+	seldiv = (freq_reg & 0x01000000) >> 24;
+	phi = (inclk_khz * ldf) / (2 * odf * idf);
+	if (seldiv)
+		phi = phi/2;
+
+	return phi;
+}
+
+int do_clkinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	uint32_t inclk_khz;
+	uint32_t reg, phi;
+	uint32_t clk_khz;
+	unsigned int clk_sel;
+	struct clk_mgt_regs *clks = clk_mgt_regs;
+	struct pll_freq_regs *plls = pll_freq_regs;
+
+	/*
+	 * Go through list of PLLs.
+	 * Initialise pll out frequency array (pll_khz) and print frequency.
+	 */
+	inclk_khz = 38400;	/* 38.4 MHz */
+	while (plls->addr) {
+		reg = readl(plls->addr);
+		phi = get_pll_freq_khz(inclk_khz, reg);
+		pll_khz[plls->idx] = phi;
+		printf("%s PLL out frequency: %d.%d Mhz\n",
+				pll_name[plls->idx], phi/1000, phi % 1000);
+		plls++;
+	}
+
+	/* check ARM clock source */
+	reg = readl(PRCM_ARM_CHGCLKREQ_REG);
+	printf("A9 running on %s\n",
+		(reg & 1) ?  "external clock" : "ARM PLL");
+
+	/* go through list of clk_mgt_reg */
+	printf("\n%19s %9s %7s %9s enabled\n",
+			"name(addr)", "value", "PLL", "CLK[MHz]");
+	while (clks->addr) {
+		reg = readl(clks->addr);
+
+		/* convert bit position into array index */
+		clk_sel = ffs((reg >> 5) & 0x7);	/* PLLSW[2:0] */
+
+		if (reg & 0x200)
+			clk_khz = 38400;	/* CLK38 is set */
+		else if ((reg & 0x1f) == 0)
+			/* ARMCLKFIX_MGT is 0x120, e.g. div = 0 ! */
+			clk_khz = 0;
+		else
+			clk_khz = pll_khz[clk_sel] / (reg & 0x1f);
+
+		printf("%9s(%08x): %08x, %6s, %4d.%03d, %s\n",
+			clks->descr, clks->addr, reg, pll_name[clk_sel],
+			clk_khz / 1000, clk_khz % 1000,
+			(reg & 0x100) ? "ena" : "dis");
+		clks++;
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	clkinfo,	1,	1,	do_clkinfo,
+	"print clock info",
+	""
+);