Add i.MX25 support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx25/clock.c b/arch/arm/mach-mx25/clock.c
new file mode 100644
index 0000000..ef26951
--- /dev/null
+++ b/arch/arm/mach-mx25/clock.c
@@ -0,0 +1,219 @@
+/*
+ * 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>
+#include <mach/mx25.h>
+
+#define CRM_BASE MX25_IO_ADDRESS(MX25_CRM_BASE_ADDR)
+
+#define CCM_MPCTL 0x00
+#define CCM_UPCTL 0x04
+#define CCM_CCTL 0x08
+#define CCM_CGCR0 0x0C
+#define CCM_CGCR1 0x10
+#define CCM_CGCR2 0x14
+#define CCM_PCDR0 0x18
+#define CCM_PCDR1 0x1C
+#define CCM_PCDR2 0x20
+#define CCM_PCDR3 0x24
+#define CCM_RCSR 0x28
+#define CCM_CRDR 0x2C
+#define CCM_DCVR0 0x30
+#define CCM_DCVR1 0x34
+#define CCM_DCVR2 0x38
+#define CCM_DCVR3 0x3c
+#define CCM_LTR0 0x40
+#define CCM_LTR1 0x44
+#define CCM_LTR2 0x48
+#define CCM_LTR3 0x4c
+
+static unsigned long get_rate_mpll(void)
+{
+ ulong mpctl = __raw_readl(CRM_BASE + CCM_MPCTL);
+
+ return mxc_decode_pll(mpctl, 24000000);
+}
+
+static unsigned long get_rate_upll(void)
+{
+ ulong mpctl = __raw_readl(CRM_BASE + CCM_UPCTL);
+
+ return mxc_decode_pll(mpctl, 24000000);
+}
+
+unsigned long get_rate_arm(struct clk *clk)
+{
+ unsigned long cctl = readl(CRM_BASE + CCM_CCTL);
+ unsigned long rate = get_rate_mpll();
+
+ if (cctl & (1 << 14))
+ rate = (rate * 3) >> 1;
+
+ return rate / ((cctl >> 30) + 1);
+}
+
+static unsigned long get_rate_ahb(struct clk *clk)
+{
+ unsigned long cctl = readl(CRM_BASE + CCM_CCTL);
+
+ return get_rate_arm(NULL) / (((cctl >> 28) & 0x3) + 1);
+}
+
+static unsigned long get_rate_ipg(struct clk *clk)
+{
+ return get_rate_ahb(NULL) >> 1;
+}
+
+static unsigned long get_rate_per(int per)
+{
+ unsigned long ofs = (per & 0x3) * 8;
+ unsigned long reg = per & ~0x3;
+ unsigned long val = (readl(CRM_BASE + CCM_PCDR0 + reg) >> ofs) & 0x3f;
+ unsigned long fref;
+
+ if (readl(CRM_BASE + 0x64) & (1 << per))
+ fref = get_rate_upll();
+ else
+ fref = get_rate_ipg(NULL);
+
+ return fref / (val + 1);
+}
+
+static unsigned long get_rate_uart(struct clk *clk)
+{
+ return get_rate_per(15);
+}
+
+static unsigned long get_rate_i2c(struct clk *clk)
+{
+ return get_rate_per(6);
+}
+
+static unsigned long get_rate_nfc(struct clk *clk)
+{
+ return get_rate_per(8);
+}
+
+static unsigned long get_rate_otg(struct clk *clk)
+{
+ return 48000000; /* FIXME */
+}
+
+static int clk_cgcr_enable(struct clk *clk)
+{
+ u32 reg;
+
+ reg = __raw_readl(clk->enable_reg);
+ reg |= 1 << clk->enable_shift;
+ __raw_writel(reg, clk->enable_reg);
+
+ return 0;
+}
+
+static void clk_cgcr_disable(struct clk *clk)
+{
+ u32 reg;
+
+ reg = __raw_readl(clk->enable_reg);
+ reg &= ~(1 << 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 = CRM_BASE + er, \
+ .enable_shift = es, \
+ .get_rate = gr, \
+ .set_rate = sr, \
+ .enable = clk_cgcr_enable, \
+ .disable = clk_cgcr_disable, \
+ }
+
+DEFINE_CLOCK(gpt_clk, 0, CCM_CGCR0, 5, get_rate_ipg, NULL);
+DEFINE_CLOCK(cspi1_clk, 0, CCM_CGCR1, 5, get_rate_ipg, NULL);
+DEFINE_CLOCK(cspi2_clk, 0, CCM_CGCR1, 6, get_rate_ipg, NULL);
+DEFINE_CLOCK(cspi3_clk, 0, CCM_CGCR1, 7, get_rate_ipg, NULL);
+DEFINE_CLOCK(uart1_clk, 0, CCM_CGCR2, 14, get_rate_uart, NULL);
+DEFINE_CLOCK(uart2_clk, 0, CCM_CGCR2, 15, get_rate_uart, NULL);
+DEFINE_CLOCK(uart3_clk, 0, CCM_CGCR2, 16, get_rate_uart, NULL);
+DEFINE_CLOCK(uart4_clk, 0, CCM_CGCR2, 17, get_rate_uart, NULL);
+DEFINE_CLOCK(uart5_clk, 0, CCM_CGCR2, 18, get_rate_uart, NULL);
+DEFINE_CLOCK(nfc_clk, 0, CCM_CGCR0, 8, get_rate_nfc, NULL);
+DEFINE_CLOCK(usbotg_clk, 0, CCM_CGCR0, 28, get_rate_otg, NULL);
+DEFINE_CLOCK(pwm1_clk, 0, CCM_CGCR1, 31, get_rate_ipg, NULL);
+DEFINE_CLOCK(pwm2_clk, 0, CCM_CGCR2, 0, get_rate_ipg, NULL);
+DEFINE_CLOCK(pwm3_clk, 0, CCM_CGCR2, 1, get_rate_ipg, NULL);
+DEFINE_CLOCK(pwm4_clk, 0, CCM_CGCR2, 2, get_rate_ipg, NULL);
+DEFINE_CLOCK(kpp_clk, 0, CCM_CGCR1, 28, get_rate_ipg, NULL);
+DEFINE_CLOCK(tsc_clk, 0, CCM_CGCR2, 13, get_rate_ipg, NULL);
+DEFINE_CLOCK(i2c_clk, 0, CCM_CGCR0, 6, get_rate_i2c, NULL);
+
+#define _REGISTER_CLOCK(d, n, c) \
+ { \
+ .dev_id = d, \
+ .con_id = n, \
+ .clk = &c, \
+ },
+
+static struct clk_lookup lookups[] = {
+ _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("imx-uart.3", NULL, uart4_clk)
+ _REGISTER_CLOCK("imx-uart.4", NULL, uart5_clk)
+ _REGISTER_CLOCK("mxc-ehci.0", "usb", usbotg_clk)
+ _REGISTER_CLOCK("mxc-ehci.1", "usb", usbotg_clk)
+ _REGISTER_CLOCK("mxc-ehci.2", "usb", usbotg_clk)
+ _REGISTER_CLOCK("fsl-usb2-udc", "usb", usbotg_clk)
+ _REGISTER_CLOCK("mxc_nand.0", NULL, nfc_clk)
+ _REGISTER_CLOCK("spi_imx.0", NULL, cspi1_clk)
+ _REGISTER_CLOCK("spi_imx.1", NULL, cspi2_clk)
+ _REGISTER_CLOCK("spi_imx.2", NULL, cspi3_clk)
+ _REGISTER_CLOCK("mxc_pwm.0", NULL, pwm1_clk)
+ _REGISTER_CLOCK("mxc_pwm.1", NULL, pwm2_clk)
+ _REGISTER_CLOCK("mxc_pwm.2", NULL, pwm3_clk)
+ _REGISTER_CLOCK("mxc_pwm.3", NULL, pwm4_clk)
+ _REGISTER_CLOCK("mxc-keypad", NULL, kpp_clk)
+ _REGISTER_CLOCK("mx25-adc", NULL, tsc_clk)
+ _REGISTER_CLOCK("imx-i2c.0", NULL, i2c_clk)
+ _REGISTER_CLOCK("imx-i2c.1", NULL, i2c_clk)
+ _REGISTER_CLOCK("imx-i2c.2", NULL, i2c_clk)
+};
+
+int __init mx25_clocks_init(unsigned long fref)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lookups); i++)
+ clkdev_add(&lookups[i]);
+
+ mxc_timer_init(&gpt_clk, MX25_IO_ADDRESS(MX25_GPT1_BASE_ADDR), 54);
+
+ return 0;
+}