[ARM] MX35: add clock support

This patch adds clock support for i.MX35 SoCs. We do not support setting
of clock rates yet, but most interesting clock rates should be reported.
I couldn't test all clock rates and the datasheet contains some obvious
bugs, so expect some bugs in this code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 489 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/Makefile b/arch/arm/mach-mx3/Makefile
index 68c4837cce6a..ab0bec0a4d92 100644
--- a/arch/arm/mach-mx3/Makefile
+++ b/arch/arm/mach-mx3/Makefile
@@ -6,6 +6,7 @@
 
 obj-y                           := mm.o devices.o
 obj-$(CONFIG_ARCH_MX31)         += clock.o iomux.o
+obj-$(CONFIG_ARCH_MX35)         += clock-imx35.o
 obj-$(CONFIG_MACH_MX31ADS)      += mx31ads.o
 obj-$(CONFIG_MACH_MX31LITE)     += mx31lite.o
 obj-$(CONFIG_MACH_PCM037)       += pcm037.o
diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c
new file mode 100644
index 000000000000..53a112d4e04a
--- /dev/null
+++ b/arch/arm/mach-mx3/clock-imx35.c
@@ -0,0 +1,487 @@
+/*
+ * Copyright (C) 2009 by Sascha Hauer, Pengutronix
+ *
+ * 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 <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <asm/clkdev.h>
+
+#include <mach/clock.h>
+#include <mach/hardware.h>
+#include <mach/common.h>
+
+#define CCM_BASE        IO_ADDRESS(CCM_BASE_ADDR)
+
+#define CCM_CCMR        0x00
+#define CCM_PDR0        0x04
+#define CCM_PDR1        0x08
+#define CCM_PDR2        0x0C
+#define CCM_PDR3        0x10
+#define CCM_PDR4        0x14
+#define CCM_RCSR        0x18
+#define CCM_MPCTL       0x1C
+#define CCM_PPCTL       0x20
+#define CCM_ACMR        0x24
+#define CCM_COSR        0x28
+#define CCM_CGR0        0x2C
+#define CCM_CGR1        0x30
+#define CCM_CGR2        0x34
+#define CCM_CGR3        0x38
+
+#ifdef HAVE_SET_RATE_SUPPORT
+static void calc_dividers(u32 div, u32 *pre, u32 *post, u32 maxpost)
+{
+        u32 min_pre, temp_pre, old_err, err;
+
+        min_pre = (div - 1) / maxpost + 1;
+        old_err = 8;
+
+        for (temp_pre = 8; temp_pre >= min_pre; temp_pre--) {
+                if (div > (temp_pre * maxpost))
+                        break;
+
+                if (div < (temp_pre * temp_pre))
+                        continue;
+
+                err = div % temp_pre;
+
+                if (err == 0) {
+                        *pre = temp_pre;
+                        break;
+                }
+
+                err = temp_pre - err;
+
+                if (err < old_err) {
+                        old_err = err;
+                        *pre = temp_pre;
+                }
+        }
+
+        *post = (div + *pre - 1) / *pre;
+}
+
+/* get the best values for a 3-bit divider combined with a 6-bit divider */
+static void calc_dividers_3_6(u32 div, u32 *pre, u32 *post)
+{
+        if (div >= 512) {
+                *pre = 8;
+                *post = 64;
+        } else if (div >= 64) {
+                calc_dividers(div, pre, post, 64);
+        } else if (div <= 8) {
+                *pre = div;
+                *post = 1;
+        } else {
+                *pre = 1;
+                *post = div;
+        }
+}
+
+/* get the best values for two cascaded 3-bit dividers */
+static void calc_dividers_3_3(u32 div, u32 *pre, u32 *post)
+{
+        if (div >= 64) {
+                *pre = *post = 8;
+        } else if (div > 8) {
+                calc_dividers(div, pre, post, 8);
+        } else {
+                *pre = 1;
+                *post = div;
+        }
+}
+#endif
+
+static unsigned long get_rate_mpll(void)
+{
+        ulong mpctl = __raw_readl(CCM_BASE + CCM_MPCTL);
+
+        return mxc_decode_pll(mpctl, 24000000);
+}
+
+static unsigned long get_rate_ppll(void)
+{
+        ulong ppctl = __raw_readl(CCM_BASE + CCM_PPCTL);
+
+        return mxc_decode_pll(ppctl, 24000000);
+}
+
+struct arm_ahb_div {
+        unsigned char arm, ahb, sel;
+};
+
+static struct arm_ahb_div clk_consumer[] = {
+        { .arm = 1, .ahb = 4, .sel = 0},
+        { .arm = 1, .ahb = 3, .sel = 1},
+        { .arm = 2, .ahb = 2, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 4, .ahb = 1, .sel = 0},
+        { .arm = 1, .ahb = 5, .sel = 0},
+        { .arm = 1, .ahb = 8, .sel = 0},
+        { .arm = 1, .ahb = 6, .sel = 1},
+        { .arm = 2, .ahb = 4, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 4, .ahb = 2, .sel = 0},
+        { .arm = 0, .ahb = 0, .sel = 0},
+};
+
+static struct arm_ahb_div clk_automotive[] = {
+        { .arm = 1, .ahb = 3, .sel = 0},
+        { .arm = 1, .ahb = 2, .sel = 1},
+        { .arm = 2, .ahb = 1, .sel = 1},
+        { .arm = 0, .ahb = 0, .sel = 0},
+        { .arm = 1, .ahb = 6, .sel = 0},
+        { .arm = 1, .ahb = 4, .sel = 1},
+        { .arm = 2, .ahb = 2, .sel = 1},
+        { .arm = 0, .ahb = 0, .sel = 0},
+};
+
+static unsigned long get_rate_arm(void)
+{
+        unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0);
+        struct arm_ahb_div *aad;
+        unsigned long fref = get_rate_mpll();
+
+        if (pdr0 & 1) {
+                /* consumer path */
+                aad = &clk_consumer[(pdr0 >> 16) & 0xf];
+                if (aad->sel)
+                        fref = fref * 2 / 3;
+        } else {
+                /* auto path */
+                aad = &clk_automotive[(pdr0 >> 9) & 0x7];
+                if (aad->sel)
+                        fref = fref * 3 / 4;
+        }
+        return fref / aad->arm;
+}
+
+static unsigned long get_rate_ahb(struct clk *clk)
+{
+        unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0);
+        struct arm_ahb_div *aad;
+        unsigned long fref = get_rate_mpll();
+
+        if (pdr0 & 1)
+                /* consumer path */
+                aad = &clk_consumer[(pdr0 >> 16) & 0xf];
+        else
+                /* auto path */
+                aad = &clk_automotive[(pdr0 >> 9) & 0x7];
+
+        return fref / aad->ahb;
+}
+
+static unsigned long get_rate_ipg(struct clk *clk)
+{
+        return get_rate_ahb(NULL) >> 1;
+}
+
+static unsigned long get_3_3_div(unsigned long in)
+{
+        return (((in >> 3) & 0x7) + 1) * ((in & 0x7) + 1);
+}
+
+static unsigned long get_rate_uart(struct clk *clk)
+{
+        unsigned long pdr3 = __raw_readl(CCM_BASE + CCM_PDR3);
+        unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4);
+        unsigned long div = get_3_3_div(pdr4 >> 10);
+
+        if (pdr3 & (1 << 14))
+                return get_rate_arm() / div;
+        else
+                return get_rate_ppll() / div;
+}
+
+static unsigned long get_rate_sdhc(struct clk *clk)
+{
+        unsigned long pdr3 = __raw_readl(CCM_BASE + CCM_PDR3);
+        unsigned long div, rate;
+
+        if (pdr3 & (1 << 6))
+                rate = get_rate_arm();
+        else
+                rate = get_rate_ppll();
+
+        switch (clk->id) {
+        default:
+        case 0:
+                div = pdr3 & 0x3f;
+                break;
+        case 1:
+                div = (pdr3 >> 8) & 0x3f;
+                break;
+        case 2:
+                div = (pdr3 >> 16) & 0x3f;
+                break;
+        }
+
+        return rate / get_3_3_div(div);
+}
+
+static unsigned long get_rate_mshc(struct clk *clk)
+{
+        unsigned long pdr1 = __raw_readl(CCM_BASE + CCM_PDR1);
+        unsigned long div1, div2, rate;
+
+        if (pdr1 & (1 << 7))
+                rate = get_rate_arm();
+        else
+                rate = get_rate_ppll();
+
+        div1 = (pdr1 >> 29) & 0x7;
+        div2 = (pdr1 >> 22) & 0x3f;
+
+        return rate / ((div1 + 1) * (div2 + 1));
+}
+
+static unsigned long get_rate_ssi(struct clk *clk)
+{
+        unsigned long pdr2 = __raw_readl(CCM_BASE + CCM_PDR2);
+        unsigned long div1, div2, rate;
+
+        if (pdr2 & (1 << 6))
+                rate = get_rate_arm();
+        else
+                rate = get_rate_ppll();
+
+        switch (clk->id) {
+        default:
+        case 0:
+                div1 = pdr2 & 0x3f;
+                div2 = (pdr2 >> 24) & 0x7;
+                break;
+        case 1:
+                div1 = (pdr2 >> 8) & 0x3f;
+                div2 = (pdr2 >> 27) & 0x7;
+                break;
+        }
+
+        return rate / ((div1 + 1) * (div2 + 1));
+}
+
+static unsigned long get_rate_csi(struct clk *clk)
+{
+        unsigned long pdr2 = __raw_readl(CCM_BASE + CCM_PDR2);
+        unsigned long rate;
+
+        if (pdr2 & (1 << 7))
+                rate = get_rate_arm();
+        else
+                rate = get_rate_ppll();
+
+        return rate / get_3_3_div((pdr2 >> 16) & 0x3f);
+}
+
+static unsigned long get_rate_ipg_per(struct clk *clk)
+{
+        unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0);
+        unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4);
+        unsigned long div1, div2;
+
+        if (pdr0 & (1 << 26)) {
+                div1 = (pdr4 >> 19) & 0x7;
+                div2 = (pdr4 >> 16) & 0x7;
+                return get_rate_arm() / ((div1 + 1) * (div2 + 1));
+        } else {
+                div1 = (pdr0 >> 12) & 0x7;
+                return get_rate_ahb(NULL) / div1;
+        }
+}
+
+static int clk_cgr_enable(struct clk *clk)
+{
+        u32 reg;
+
+        reg = __raw_readl(clk->enable_reg);
+        reg |= 3 << clk->enable_shift;
+        __raw_writel(reg, clk->enable_reg);
+
+        return 0;
+}
+
+static void clk_cgr_disable(struct clk *clk)
+{
+        u32 reg;
+
+        reg = __raw_readl(clk->enable_reg);
+        reg &= ~(3 << clk->enable_shift);
+        __raw_writel(reg, clk->enable_reg);
+}
+
+#define DEFINE_CLOCK(name, i, er, es, gr, sr)           \
+        static struct clk name = {                      \
+                .id             = i,                    \
+                .enable_reg     = CCM_BASE + er,        \
+                .enable_shift   = es,                   \
+                .get_rate       = gr,                   \
+                .set_rate       = sr,                   \
+                .enable         = clk_cgr_enable,       \
+                .disable        = clk_cgr_disable,      \
+        }
+
+DEFINE_CLOCK(asrc_clk,   0, CCM_CGR0,  0, NULL, NULL);
+DEFINE_CLOCK(ata_clk,    0, CCM_CGR0,  2, get_rate_ipg, NULL);
+DEFINE_CLOCK(audmux_clk, 0, CCM_CGR0,  4, NULL, NULL);
+DEFINE_CLOCK(can1_clk,   0, CCM_CGR0,  6, get_rate_ipg, NULL);
+DEFINE_CLOCK(can2_clk,   1, CCM_CGR0,  8, get_rate_ipg, NULL);
+DEFINE_CLOCK(cspi1_clk,  0, CCM_CGR0, 10, get_rate_ipg, NULL);
+DEFINE_CLOCK(cspi2_clk,  1, CCM_CGR0, 12, get_rate_ipg, NULL);
+DEFINE_CLOCK(ect_clk,    0, CCM_CGR0, 14, get_rate_ipg, NULL);
+DEFINE_CLOCK(edio_clk,   0, CCM_CGR0, 16, NULL, NULL);
+DEFINE_CLOCK(emi_clk,    0, CCM_CGR0, 18, get_rate_ipg, NULL);
+DEFINE_CLOCK(epit1_clk,  0, CCM_CGR0, 20, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(epit2_clk,  1, CCM_CGR0, 22, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(esai_clk,   0, CCM_CGR0, 24, NULL, NULL);
+DEFINE_CLOCK(esdhc1_clk, 0, CCM_CGR0, 26, get_rate_sdhc, NULL);
+DEFINE_CLOCK(esdhc2_clk, 1, CCM_CGR0, 28, get_rate_sdhc, NULL);
+DEFINE_CLOCK(esdhc3_clk, 2, CCM_CGR0, 30, get_rate_sdhc, NULL);
+
+DEFINE_CLOCK(fec_clk,    0, CCM_CGR1,  0, get_rate_ipg, NULL);
+DEFINE_CLOCK(gpio1_clk,  0, CCM_CGR1,  2, NULL, NULL);
+DEFINE_CLOCK(gpio2_clk,  1, CCM_CGR1,  4, NULL, NULL);
+DEFINE_CLOCK(gpio3_clk,  2, CCM_CGR1,  6, NULL, NULL);
+DEFINE_CLOCK(gpt_clk,    0, CCM_CGR1,  8, get_rate_ipg, NULL);
+DEFINE_CLOCK(i2c1_clk,   0, CCM_CGR1, 10, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(i2c2_clk,   1, CCM_CGR1, 12, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(i2c3_clk,   2, CCM_CGR1, 14, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(iomuxc_clk, 0, CCM_CGR1, 16, NULL, NULL);
+DEFINE_CLOCK(ipu_clk,    0, CCM_CGR1, 18, NULL, NULL);
+DEFINE_CLOCK(kpp_clk,    0, CCM_CGR1, 20, get_rate_ipg, NULL);
+DEFINE_CLOCK(mlb_clk,    0, CCM_CGR1, 22, get_rate_ahb, NULL);
+DEFINE_CLOCK(mshc_clk,   0, CCM_CGR1, 24, get_rate_mshc, NULL);
+DEFINE_CLOCK(owire_clk,  0, CCM_CGR1, 26, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(pwm_clk,    0, CCM_CGR1, 28, get_rate_ipg_per, NULL);
+DEFINE_CLOCK(rngc_clk,   0, CCM_CGR1, 30, get_rate_ipg, NULL);
+
+DEFINE_CLOCK(rtc_clk,    0, CCM_CGR2,  0, get_rate_ipg, NULL);
+DEFINE_CLOCK(rtic_clk,   0, CCM_CGR2,  2, get_rate_ahb, NULL);
+DEFINE_CLOCK(scc_clk,    0, CCM_CGR2,  4, get_rate_ipg, NULL);
+DEFINE_CLOCK(sdma_clk,   0, CCM_CGR2,  6, NULL, NULL);
+DEFINE_CLOCK(spba_clk,   0, CCM_CGR2,  8, get_rate_ipg, NULL);
+DEFINE_CLOCK(spdif_clk,  0, CCM_CGR2, 10, NULL, NULL);
+DEFINE_CLOCK(ssi1_clk,   0, CCM_CGR2, 12, get_rate_ssi, NULL);
+DEFINE_CLOCK(ssi2_clk,   1, CCM_CGR2, 14, get_rate_ssi, NULL);
+DEFINE_CLOCK(uart1_clk,  0, CCM_CGR2, 16, get_rate_uart, NULL);
+DEFINE_CLOCK(uart2_clk,  1, CCM_CGR2, 18, get_rate_uart, NULL);
+DEFINE_CLOCK(uart3_clk,  2, CCM_CGR2, 20, get_rate_uart, NULL);
+DEFINE_CLOCK(usbotg_clk, 0, CCM_CGR2, 22, NULL, NULL);
+DEFINE_CLOCK(wdog_clk,   0, CCM_CGR2, 24, NULL, NULL);
+DEFINE_CLOCK(max_clk,    0, CCM_CGR2, 26, NULL, NULL);
+DEFINE_CLOCK(admux_clk,  0, CCM_CGR2, 30, NULL, NULL);
+
+DEFINE_CLOCK(csi_clk,    0, CCM_CGR3,  0, get_rate_csi, NULL);
+DEFINE_CLOCK(iim_clk,    0, CCM_CGR3,  2, NULL, NULL);
+DEFINE_CLOCK(gpu2d_clk,  0, CCM_CGR3,  4, NULL, NULL);
+
+#define _REGISTER_CLOCK(d, n, c)        \
+        {                               \
+                .dev_id = d,            \
+                .con_id = n,            \
+                .clk = &c,              \
+        },
+
+static struct clk_lookup lookups[] __initdata = {
+        _REGISTER_CLOCK(NULL, "asrc", asrc_clk)
+        _REGISTER_CLOCK(NULL, "ata", ata_clk)
+        _REGISTER_CLOCK(NULL, "audmux", audmux_clk)
+        _REGISTER_CLOCK(NULL, "can", can1_clk)
+        _REGISTER_CLOCK(NULL, "can", can2_clk)
+        _REGISTER_CLOCK("spi_imx.0", NULL, cspi1_clk)
+        _REGISTER_CLOCK("spi_imx.1", NULL, cspi2_clk)
+        _REGISTER_CLOCK(NULL, "ect", ect_clk)
+        _REGISTER_CLOCK(NULL, "edio", edio_clk)
+        _REGISTER_CLOCK(NULL, "emi", emi_clk)
+        _REGISTER_CLOCK(NULL, "epit", epit1_clk)
+        _REGISTER_CLOCK(NULL, "epit", epit2_clk)
+        _REGISTER_CLOCK(NULL, "esai", esai_clk)
+        _REGISTER_CLOCK(NULL, "sdhc", esdhc1_clk)
+        _REGISTER_CLOCK(NULL, "sdhc", esdhc2_clk)
+        _REGISTER_CLOCK(NULL, "sdhc", esdhc3_clk)
+        _REGISTER_CLOCK("fec.0", NULL, fec_clk)
+        _REGISTER_CLOCK(NULL, "gpio", gpio1_clk)
+        _REGISTER_CLOCK(NULL, "gpio", gpio2_clk)
+        _REGISTER_CLOCK(NULL, "gpio", gpio3_clk)
+        _REGISTER_CLOCK("gpt.0", NULL, gpt_clk)
+        _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
+        _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
+        _REGISTER_CLOCK("imx-i2c.2", NULL, i2c3_clk)
+        _REGISTER_CLOCK(NULL, "iomuxc", iomuxc_clk)
+        _REGISTER_CLOCK(NULL, "ipu", ipu_clk)
+        _REGISTER_CLOCK(NULL, "kpp", kpp_clk)
+        _REGISTER_CLOCK(NULL, "mlb", mlb_clk)
+        _REGISTER_CLOCK(NULL, "mshc", mshc_clk)
+        _REGISTER_CLOCK("mxc_w1", NULL, owire_clk)
+        _REGISTER_CLOCK(NULL, "pwm", pwm_clk)
+        _REGISTER_CLOCK(NULL, "rngc", rngc_clk)
+        _REGISTER_CLOCK(NULL, "rtc", rtc_clk)
+        _REGISTER_CLOCK(NULL, "rtic", rtic_clk)
+        _REGISTER_CLOCK(NULL, "scc", scc_clk)
+        _REGISTER_CLOCK(NULL, "sdma", sdma_clk)
+        _REGISTER_CLOCK(NULL, "spba", spba_clk)
+        _REGISTER_CLOCK(NULL, "spdif", spdif_clk)
+        _REGISTER_CLOCK(NULL, "ssi", ssi1_clk)
+        _REGISTER_CLOCK(NULL, "ssi", ssi2_clk)
+        _REGISTER_CLOCK("imx-uart.0", NULL, uart1_clk)
+        _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk)
+        _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
+        _REGISTER_CLOCK(NULL, "usbotg", usbotg_clk)
+        _REGISTER_CLOCK("mxc_wdt.0", NULL, wdog_clk)
+        _REGISTER_CLOCK(NULL, "max", max_clk)
+        _REGISTER_CLOCK(NULL, "admux", admux_clk)
+        _REGISTER_CLOCK(NULL, "csi", csi_clk)
+        _REGISTER_CLOCK(NULL, "iim", iim_clk)
+        _REGISTER_CLOCK(NULL, "gpu2d", gpu2d_clk)
+};
+
+int __init mx35_clocks_init()
+{
+        int i;
+        unsigned int ll = 0;
+
+        mxc_set_cpu_type(MXC_CPU_MX35);
+
+#ifdef CONFIG_DEBUG_LL_CONSOLE
+        ll = (3 << 16);
+#endif
+
+        for (i = 0; i < ARRAY_SIZE(lookups); i++)
+                clkdev_add(&lookups[i]);
+
+        /* Turn off all clocks except the ones we need to survive, namely:
+         * EMI, GPIO1/2/3, GPT, IOMUX, MAX and eventually uart
+         */
+        __raw_writel((3 << 18), CCM_BASE + CCM_CGR0);
+        __raw_writel((3 << 2) | (3 << 4) | (3 << 6) | (3 << 8) | (3 << 16),
+                        CCM_BASE + CCM_CGR1);
+        __raw_writel((3 << 26) | ll, CCM_BASE + CCM_CGR2);
+        __raw_writel(0, CCM_BASE + CCM_CGR3);
+
+        mxc_timer_init(&gpt_clk);
+
+        return 0;
+}
+
diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index f467159cbdce..b2f9b72644db 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/arch/arm/plat-mxc/include/mach/common.h
@@ -21,6 +21,7 @@ extern int mx1_clocks_init(unsigned long fref);
 extern int mx21_clocks_init(unsigned long lref, unsigned long fref);
 extern int mx27_clocks_init(unsigned long fref);
 extern int mx31_clocks_init(unsigned long fref);
+extern int mx35_clocks_init(void);
 extern int mxc_register_gpios(void);
 extern int mxc_register_device(struct platform_device *pdev, void *data);
 extern void mxc_set_cpu_type(unsigned int type);