OMAP1 clock: convert mach-omap1/clock.h to mach-omap1/clock_data.c
The OMAP1 clock code currently #includes a large .h file full of static
data structures. Instead, define the data in a .c file.
Russell King <linux@arm.linux.org.uk> proposed this new arrangement:
http://marc.info/?l=linux-omap&m=125967425908895&w=2
This patch also deals with most of the flagrant checkpatch violations.
While here, separate the mpu_rate data structures out into their own
files, opp.h and opp_data.c. In the long run, these mpu_rate tables
should be replaced with OPP code.
Also includes a patch from Felipe Balbi <felipe.balbi@nokia.com> to
mark omap1_clk_functions as __initdata to avoid a section warning:
http://patchwork.kernel.org/patch/64366/
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Felipe Balbi <felipe.balbi@nokia.com>
Cc: Nishanth Menon <nm@ti.com>
diff --git a/arch/arm/mach-omap1/clock.c b/arch/arm/mach-omap1/clock.c
index 26a887c..2ba9ab9 100644
--- a/arch/arm/mach-omap1/clock.c
+++ b/arch/arm/mach-omap1/clock.c
@@ -1,7 +1,7 @@
/*
* linux/arch/arm/mach-omap1/clock.c
*
- * Copyright (C) 2004 - 2005 Nokia corporation
+ * Copyright (C) 2004 - 2005, 2009 Nokia corporation
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
*
* Modified to use omap shared clock framework by
@@ -26,12 +26,17 @@
#include <plat/usb.h>
#include <plat/clock.h>
#include <plat/sram.h>
-
-static const struct clkops clkops_generic;
-static const struct clkops clkops_uart;
-static const struct clkops clkops_dspck;
+#include <plat/clkdev_omap.h>
#include "clock.h"
+#include "opp.h"
+
+__u32 arm_idlect1_mask;
+struct clk *api_ck_p, *ck_dpll1_p, *ck_ref_p;
+
+/*-------------------------------------------------------------------------
+ * Omap1 specific clock functions
+ *-------------------------------------------------------------------------*/
static int clk_omap1_dummy_enable(struct clk *clk)
{
@@ -42,134 +47,24 @@
{
}
-static const struct clkops clkops_dummy = {
- .enable = clk_omap1_dummy_enable,
- .disable = clk_omap1_dummy_disable,
+const struct clkops clkops_dummy = {
+ .enable = clk_omap1_dummy_enable,
+ .disable = clk_omap1_dummy_disable,
};
-static struct clk dummy_ck = {
- .name = "dummy",
- .ops = &clkops_dummy,
- .flags = RATE_FIXED,
-};
-
-struct omap_clk {
- u32 cpu;
- struct clk_lookup lk;
-};
-
-#define CLK(dev, con, ck, cp) \
- { \
- .cpu = cp, \
- .lk = { \
- .dev_id = dev, \
- .con_id = con, \
- .clk = ck, \
- }, \
- }
-
-#define CK_310 (1 << 0)
-#define CK_7XX (1 << 1)
-#define CK_1510 (1 << 2)
-#define CK_16XX (1 << 3)
-
-static struct omap_clk omap_clks[] = {
- /* non-ULPD clocks */
- CLK(NULL, "ck_ref", &ck_ref, CK_16XX | CK_1510 | CK_310 | CK_7XX),
- CLK(NULL, "ck_dpll1", &ck_dpll1, CK_16XX | CK_1510 | CK_310),
- /* CK_GEN1 clocks */
- CLK(NULL, "ck_dpll1out", &ck_dpll1out.clk, CK_16XX),
- CLK(NULL, "ck_sossi", &sossi_ck, CK_16XX),
- CLK(NULL, "arm_ck", &arm_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "armper_ck", &armper_ck.clk, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "arm_gpio_ck", &arm_gpio_ck, CK_1510 | CK_310),
- CLK(NULL, "armxor_ck", &armxor_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
- CLK(NULL, "armtim_ck", &armtim_ck.clk, CK_16XX | CK_1510 | CK_310),
- CLK("omap_wdt", "fck", &armwdt_ck.clk, CK_16XX | CK_1510 | CK_310),
- CLK("omap_wdt", "ick", &armper_ck.clk, CK_16XX),
- CLK("omap_wdt", "ick", &dummy_ck, CK_1510 | CK_310),
- CLK(NULL, "arminth_ck", &arminth_ck1510, CK_1510 | CK_310),
- CLK(NULL, "arminth_ck", &arminth_ck16xx, CK_16XX),
- /* CK_GEN2 clocks */
- CLK(NULL, "dsp_ck", &dsp_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "dspmmu_ck", &dspmmu_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "dspper_ck", &dspper_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "dspxor_ck", &dspxor_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "dsptim_ck", &dsptim_ck, CK_16XX | CK_1510 | CK_310),
- /* CK_GEN3 clocks */
- CLK(NULL, "tc_ck", &tc_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
- CLK(NULL, "tipb_ck", &tipb_ck, CK_1510 | CK_310),
- CLK(NULL, "l3_ocpi_ck", &l3_ocpi_ck, CK_16XX | CK_7XX),
- CLK(NULL, "tc1_ck", &tc1_ck, CK_16XX),
- CLK(NULL, "tc2_ck", &tc2_ck, CK_16XX),
- CLK(NULL, "dma_ck", &dma_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "dma_lcdfree_ck", &dma_lcdfree_ck, CK_16XX),
- CLK(NULL, "api_ck", &api_ck.clk, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "lb_ck", &lb_ck.clk, CK_1510 | CK_310),
- CLK(NULL, "rhea1_ck", &rhea1_ck, CK_16XX),
- CLK(NULL, "rhea2_ck", &rhea2_ck, CK_16XX),
- CLK(NULL, "lcd_ck", &lcd_ck_16xx, CK_16XX | CK_7XX),
- CLK(NULL, "lcd_ck", &lcd_ck_1510.clk, CK_1510 | CK_310),
- /* ULPD clocks */
- CLK(NULL, "uart1_ck", &uart1_1510, CK_1510 | CK_310),
- CLK(NULL, "uart1_ck", &uart1_16xx.clk, CK_16XX),
- CLK(NULL, "uart2_ck", &uart2_ck, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "uart3_ck", &uart3_1510, CK_1510 | CK_310),
- CLK(NULL, "uart3_ck", &uart3_16xx.clk, CK_16XX),
- CLK(NULL, "usb_clko", &usb_clko, CK_16XX | CK_1510 | CK_310),
- CLK(NULL, "usb_hhc_ck", &usb_hhc_ck1510, CK_1510 | CK_310),
- CLK(NULL, "usb_hhc_ck", &usb_hhc_ck16xx, CK_16XX),
- CLK(NULL, "usb_dc_ck", &usb_dc_ck, CK_16XX),
- CLK(NULL, "usb_dc_ck", &usb_dc_ck7xx, CK_7XX),
- CLK(NULL, "mclk", &mclk_1510, CK_1510 | CK_310),
- CLK(NULL, "mclk", &mclk_16xx, CK_16XX),
- CLK(NULL, "bclk", &bclk_1510, CK_1510 | CK_310),
- CLK(NULL, "bclk", &bclk_16xx, CK_16XX),
- CLK("mmci-omap.0", "fck", &mmc1_ck, CK_16XX | CK_1510 | CK_310),
- CLK("mmci-omap.0", "fck", &mmc3_ck, CK_7XX),
- CLK("mmci-omap.0", "ick", &armper_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
- CLK("mmci-omap.1", "fck", &mmc2_ck, CK_16XX),
- CLK("mmci-omap.1", "ick", &armper_ck.clk, CK_16XX),
- /* Virtual clocks */
- CLK(NULL, "mpu", &virtual_ck_mpu, CK_16XX | CK_1510 | CK_310),
- CLK("i2c_omap.1", "fck", &i2c_fck, CK_16XX | CK_1510 | CK_310),
- CLK("i2c_omap.1", "ick", &i2c_ick, CK_16XX),
- CLK("i2c_omap.1", "ick", &dummy_ck, CK_1510 | CK_310),
- CLK("omap_uwire", "fck", &armxor_ck.clk, CK_16XX | CK_1510 | CK_310),
- CLK("omap-mcbsp.1", "ick", &dspper_ck, CK_16XX),
- CLK("omap-mcbsp.1", "ick", &dummy_ck, CK_1510 | CK_310),
- CLK("omap-mcbsp.2", "ick", &armper_ck.clk, CK_16XX),
- CLK("omap-mcbsp.2", "ick", &dummy_ck, CK_1510 | CK_310),
- CLK("omap-mcbsp.3", "ick", &dspper_ck, CK_16XX),
- CLK("omap-mcbsp.3", "ick", &dummy_ck, CK_1510 | CK_310),
- CLK("omap-mcbsp.1", "fck", &dspxor_ck, CK_16XX | CK_1510 | CK_310),
- CLK("omap-mcbsp.2", "fck", &armper_ck.clk, CK_16XX | CK_1510 | CK_310),
- CLK("omap-mcbsp.3", "fck", &dspxor_ck, CK_16XX | CK_1510 | CK_310),
-};
-
-static int omap1_clk_enable_generic(struct clk * clk);
-static int omap1_clk_enable(struct clk *clk);
-static void omap1_clk_disable_generic(struct clk * clk);
-static void omap1_clk_disable(struct clk *clk);
-
-__u32 arm_idlect1_mask;
-
-/*-------------------------------------------------------------------------
- * Omap1 specific clock functions
- *-------------------------------------------------------------------------*/
-
-static unsigned long omap1_watchdog_recalc(struct clk *clk)
+/* XXX can be replaced with a fixed_divisor_recalc */
+unsigned long omap1_watchdog_recalc(struct clk *clk)
{
return clk->parent->rate / 14;
}
-static unsigned long omap1_uart_recalc(struct clk *clk)
+unsigned long omap1_uart_recalc(struct clk *clk)
{
unsigned int val = __raw_readl(clk->enable_reg);
return val & clk->enable_bit ? 48000000 : 12000000;
}
-static unsigned long omap1_sossi_recalc(struct clk *clk)
+unsigned long omap1_sossi_recalc(struct clk *clk)
{
u32 div = omap_readl(MOD_CONF_CTRL_1);
@@ -179,64 +74,6 @@
return clk->parent->rate / div;
}
-static int omap1_clk_enable_dsp_domain(struct clk *clk)
-{
- int retval;
-
- retval = omap1_clk_enable(&api_ck.clk);
- if (!retval) {
- retval = omap1_clk_enable_generic(clk);
- omap1_clk_disable(&api_ck.clk);
- }
-
- return retval;
-}
-
-static void omap1_clk_disable_dsp_domain(struct clk *clk)
-{
- if (omap1_clk_enable(&api_ck.clk) == 0) {
- omap1_clk_disable_generic(clk);
- omap1_clk_disable(&api_ck.clk);
- }
-}
-
-static const struct clkops clkops_dspck = {
- .enable = &omap1_clk_enable_dsp_domain,
- .disable = &omap1_clk_disable_dsp_domain,
-};
-
-static int omap1_clk_enable_uart_functional(struct clk *clk)
-{
- int ret;
- struct uart_clk *uclk;
-
- ret = omap1_clk_enable_generic(clk);
- if (ret == 0) {
- /* Set smart idle acknowledgement mode */
- uclk = (struct uart_clk *)clk;
- omap_writeb((omap_readb(uclk->sysc_addr) & ~0x10) | 8,
- uclk->sysc_addr);
- }
-
- return ret;
-}
-
-static void omap1_clk_disable_uart_functional(struct clk *clk)
-{
- struct uart_clk *uclk;
-
- /* Set force idle acknowledgement mode */
- uclk = (struct uart_clk *)clk;
- omap_writeb((omap_readb(uclk->sysc_addr) & ~0x18), uclk->sysc_addr);
-
- omap1_clk_disable_generic(clk);
-}
-
-static const struct clkops clkops_uart = {
- .enable = &omap1_clk_enable_uart_functional,
- .disable = &omap1_clk_disable_uart_functional,
-};
-
static void omap1_clk_allow_idle(struct clk *clk)
{
struct arm_idlect1_clk * iclk = (struct arm_idlect1_clk *)clk;
@@ -344,7 +181,7 @@
return dsor_exp;
}
-static unsigned long omap1_ckctl_recalc(struct clk *clk)
+unsigned long omap1_ckctl_recalc(struct clk *clk)
{
/* Calculate divisor encoded as 2-bit exponent */
int dsor = 1 << (3 & (omap_readw(ARM_CKCTL) >> clk->rate_offset));
@@ -352,7 +189,7 @@
return clk->parent->rate / dsor;
}
-static unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk)
+unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk)
{
int dsor;
@@ -363,25 +200,29 @@
* Note that DSP_CKCTL virt addr = phys addr, so
* we must use __raw_readw() instead of omap_readw().
*/
- omap1_clk_enable(&api_ck.clk);
+ omap1_clk_enable(api_ck_p);
dsor = 1 << (3 & (__raw_readw(DSP_CKCTL) >> clk->rate_offset));
- omap1_clk_disable(&api_ck.clk);
+ omap1_clk_disable(api_ck_p);
return clk->parent->rate / dsor;
}
/* MPU virtual clock functions */
-static int omap1_select_table_rate(struct clk * clk, unsigned long rate)
+int omap1_select_table_rate(struct clk *clk, unsigned long rate)
{
/* Find the highest supported frequency <= rate and switch to it */
struct mpu_rate * ptr;
+ unsigned long dpll1_rate, ref_rate;
- for (ptr = rate_table; ptr->rate; ptr++) {
- if (ptr->xtal != ck_ref.rate)
+ dpll1_rate = clk_get_rate(ck_dpll1_p);
+ ref_rate = clk_get_rate(ck_ref_p);
+
+ for (ptr = omap1_rate_table; ptr->rate; ptr++) {
+ if (ptr->xtal != ref_rate)
continue;
/* DPLL1 cannot be reprogrammed without risking system crash */
- if (likely(ck_dpll1.rate!=0) && ptr->pll_rate != ck_dpll1.rate)
+ if (likely(dpll1_rate != 0) && ptr->pll_rate != dpll1_rate)
continue;
/* Can check only after xtal frequency check */
@@ -402,11 +243,13 @@
else
omap_sram_reprogram_clock(ptr->dpllctl_val, ptr->ckctl_val);
- ck_dpll1.rate = ptr->pll_rate;
+ /* XXX Do we need to recalculate the tree below DPLL1 at this point? */
+ ck_dpll1_p->rate = ptr->pll_rate;
+
return 0;
}
-static int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate)
+int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate)
{
int dsor_exp;
u16 regval;
@@ -426,7 +269,7 @@
return 0;
}
-static long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate)
+long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate)
{
int dsor_exp = calc_dsor_exp(clk, rate);
if (dsor_exp < 0)
@@ -436,7 +279,7 @@
return clk->parent->rate / (1 << dsor_exp);
}
-static int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate)
+int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate)
{
int dsor_exp;
u16 regval;
@@ -456,16 +299,19 @@
return 0;
}
-static long omap1_round_to_table_rate(struct clk * clk, unsigned long rate)
+long omap1_round_to_table_rate(struct clk *clk, unsigned long rate)
{
/* Find the highest supported frequency <= rate */
struct mpu_rate * ptr;
- long highest_rate;
+ long highest_rate;
+ unsigned long ref_rate;
+
+ ref_rate = clk_get_rate(ck_ref_p);
highest_rate = -EINVAL;
- for (ptr = rate_table; ptr->rate; ptr++) {
- if (ptr->xtal != ck_ref.rate)
+ for (ptr = omap1_rate_table; ptr->rate; ptr++) {
+ if (ptr->xtal != ref_rate)
continue;
highest_rate = ptr->rate;
@@ -500,8 +346,8 @@
return dsor;
}
-/* Only needed on 1510 */
-static int omap1_set_uart_rate(struct clk * clk, unsigned long rate)
+/* XXX Only needed on 1510 */
+int omap1_set_uart_rate(struct clk *clk, unsigned long rate)
{
unsigned int val;
@@ -519,7 +365,7 @@
}
/* External clock (MCLK & BCLK) functions */
-static int omap1_set_ext_clk_rate(struct clk * clk, unsigned long rate)
+int omap1_set_ext_clk_rate(struct clk *clk, unsigned long rate)
{
unsigned dsor;
__u16 ratio_bits;
@@ -537,7 +383,7 @@
return 0;
}
-static int omap1_set_sossi_rate(struct clk *clk, unsigned long rate)
+int omap1_set_sossi_rate(struct clk *clk, unsigned long rate)
{
u32 l;
int div;
@@ -560,12 +406,12 @@
return 0;
}
-static long omap1_round_ext_clk_rate(struct clk * clk, unsigned long rate)
+long omap1_round_ext_clk_rate(struct clk *clk, unsigned long rate)
{
return 96000000 / calc_ext_dsor(rate);
}
-static void omap1_init_ext_clk(struct clk * clk)
+void omap1_init_ext_clk(struct clk *clk)
{
unsigned dsor;
__u16 ratio_bits;
@@ -583,7 +429,7 @@
clk-> rate = 96000000 / dsor;
}
-static int omap1_clk_enable(struct clk *clk)
+int omap1_clk_enable(struct clk *clk)
{
int ret = 0;
@@ -611,7 +457,7 @@
return ret;
}
-static void omap1_clk_disable(struct clk *clk)
+void omap1_clk_disable(struct clk *clk)
{
if (clk->usecount > 0 && !(--clk->usecount)) {
clk->ops->disable(clk);
@@ -666,12 +512,70 @@
}
}
-static const struct clkops clkops_generic = {
- .enable = &omap1_clk_enable_generic,
- .disable = &omap1_clk_disable_generic,
+const struct clkops clkops_generic = {
+ .enable = omap1_clk_enable_generic,
+ .disable = omap1_clk_disable_generic,
};
-static long omap1_clk_round_rate(struct clk *clk, unsigned long rate)
+static int omap1_clk_enable_dsp_domain(struct clk *clk)
+{
+ int retval;
+
+ retval = omap1_clk_enable(api_ck_p);
+ if (!retval) {
+ retval = omap1_clk_enable_generic(clk);
+ omap1_clk_disable(api_ck_p);
+ }
+
+ return retval;
+}
+
+static void omap1_clk_disable_dsp_domain(struct clk *clk)
+{
+ if (omap1_clk_enable(api_ck_p) == 0) {
+ omap1_clk_disable_generic(clk);
+ omap1_clk_disable(api_ck_p);
+ }
+}
+
+const struct clkops clkops_dspck = {
+ .enable = omap1_clk_enable_dsp_domain,
+ .disable = omap1_clk_disable_dsp_domain,
+};
+
+static int omap1_clk_enable_uart_functional(struct clk *clk)
+{
+ int ret;
+ struct uart_clk *uclk;
+
+ ret = omap1_clk_enable_generic(clk);
+ if (ret == 0) {
+ /* Set smart idle acknowledgement mode */
+ uclk = (struct uart_clk *)clk;
+ omap_writeb((omap_readb(uclk->sysc_addr) & ~0x10) | 8,
+ uclk->sysc_addr);
+ }
+
+ return ret;
+}
+
+static void omap1_clk_disable_uart_functional(struct clk *clk)
+{
+ struct uart_clk *uclk;
+
+ /* Set force idle acknowledgement mode */
+ uclk = (struct uart_clk *)clk;
+ omap_writeb((omap_readb(uclk->sysc_addr) & ~0x18), uclk->sysc_addr);
+
+ omap1_clk_disable_generic(clk);
+}
+
+const struct clkops clkops_uart = {
+ .enable = omap1_clk_enable_uart_functional,
+ .disable = omap1_clk_disable_uart_functional,
+};
+
+long omap1_clk_round_rate(struct clk *clk, unsigned long rate)
{
if (clk->flags & RATE_FIXED)
return clk->rate;
@@ -682,7 +586,7 @@
return clk->rate;
}
-static int omap1_clk_set_rate(struct clk *clk, unsigned long rate)
+int omap1_clk_set_rate(struct clk *clk, unsigned long rate)
{
int ret = -EINVAL;
@@ -697,7 +601,7 @@
#ifdef CONFIG_OMAP_RESET_CLOCKS
-static void __init omap1_clk_disable_unused(struct clk *clk)
+void __init omap1_clk_disable_unused(struct clk *clk)
{
__u32 regval32;
@@ -723,168 +627,4 @@
printk(" done\n");
}
-#else
-#define omap1_clk_disable_unused NULL
#endif
-
-static struct clk_functions omap1_clk_functions = {
- .clk_enable = omap1_clk_enable,
- .clk_disable = omap1_clk_disable,
- .clk_round_rate = omap1_clk_round_rate,
- .clk_set_rate = omap1_clk_set_rate,
- .clk_disable_unused = omap1_clk_disable_unused,
-};
-
-int __init omap1_clk_init(void)
-{
- struct omap_clk *c;
- const struct omap_clock_config *info;
- int crystal_type = 0; /* Default 12 MHz */
- u32 reg, cpu_mask;
-
-#ifdef CONFIG_DEBUG_LL
- /* Resets some clocks that may be left on from bootloader,
- * but leaves serial clocks on.
- */
- omap_writel(0x3 << 29, MOD_CONF_CTRL_0);
-#endif
-
- /* USB_REQ_EN will be disabled later if necessary (usb_dc_ck) */
- reg = omap_readw(SOFT_REQ_REG) & (1 << 4);
- omap_writew(reg, SOFT_REQ_REG);
- if (!cpu_is_omap15xx())
- omap_writew(0, SOFT_REQ_REG2);
-
- clk_init(&omap1_clk_functions);
-
- /* By default all idlect1 clocks are allowed to idle */
- arm_idlect1_mask = ~0;
-
- for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++)
- clk_preinit(c->lk.clk);
-
- cpu_mask = 0;
- if (cpu_is_omap16xx())
- cpu_mask |= CK_16XX;
- if (cpu_is_omap1510())
- cpu_mask |= CK_1510;
- if (cpu_is_omap7xx())
- cpu_mask |= CK_7XX;
- if (cpu_is_omap310())
- cpu_mask |= CK_310;
-
- for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++)
- if (c->cpu & cpu_mask) {
- clkdev_add(&c->lk);
- clk_register(c->lk.clk);
- }
-
- info = omap_get_config(OMAP_TAG_CLOCK, struct omap_clock_config);
- if (info != NULL) {
- if (!cpu_is_omap15xx())
- crystal_type = info->system_clock_type;
- }
-
-#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
- ck_ref.rate = 13000000;
-#elif defined(CONFIG_ARCH_OMAP16XX)
- if (crystal_type == 2)
- ck_ref.rate = 19200000;
-#endif
-
- printk("Clocks: ARM_SYSST: 0x%04x DPLL_CTL: 0x%04x ARM_CKCTL: 0x%04x\n",
- omap_readw(ARM_SYSST), omap_readw(DPLL_CTL),
- omap_readw(ARM_CKCTL));
-
- /* We want to be in syncronous scalable mode */
- omap_writew(0x1000, ARM_SYSST);
-
-#ifdef CONFIG_OMAP_CLOCKS_SET_BY_BOOTLOADER
- /* Use values set by bootloader. Determine PLL rate and recalculate
- * dependent clocks as if kernel had changed PLL or divisors.
- */
- {
- unsigned pll_ctl_val = omap_readw(DPLL_CTL);
-
- ck_dpll1.rate = ck_ref.rate; /* Base xtal rate */
- if (pll_ctl_val & 0x10) {
- /* PLL enabled, apply multiplier and divisor */
- if (pll_ctl_val & 0xf80)
- ck_dpll1.rate *= (pll_ctl_val & 0xf80) >> 7;
- ck_dpll1.rate /= ((pll_ctl_val & 0x60) >> 5) + 1;
- } else {
- /* PLL disabled, apply bypass divisor */
- switch (pll_ctl_val & 0xc) {
- case 0:
- break;
- case 0x4:
- ck_dpll1.rate /= 2;
- break;
- default:
- ck_dpll1.rate /= 4;
- break;
- }
- }
- }
-#else
- /* Find the highest supported frequency and enable it */
- if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) {
- printk(KERN_ERR "System frequencies not set. Check your config.\n");
- /* Guess sane values (60MHz) */
- omap_writew(0x2290, DPLL_CTL);
- omap_writew(cpu_is_omap7xx() ? 0x3005 : 0x1005, ARM_CKCTL);
- ck_dpll1.rate = 60000000;
- }
-#endif
- propagate_rate(&ck_dpll1);
- /* Cache rates for clocks connected to ck_ref (not dpll1) */
- propagate_rate(&ck_ref);
- printk(KERN_INFO "Clocking rate (xtal/DPLL1/MPU): "
- "%ld.%01ld/%ld.%01ld/%ld.%01ld MHz\n",
- ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10,
- ck_dpll1.rate / 1000000, (ck_dpll1.rate / 100000) % 10,
- arm_ck.rate / 1000000, (arm_ck.rate / 100000) % 10);
-
-#if defined(CONFIG_MACH_OMAP_PERSEUS2) || defined(CONFIG_MACH_OMAP_FSAMPLE)
- /* Select slicer output as OMAP input clock */
- omap_writew(omap_readw(OMAP7XX_PCC_UPLD_CTRL) & ~0x1, OMAP7XX_PCC_UPLD_CTRL);
-#endif
-
- /* Amstrad Delta wants BCLK high when inactive */
- if (machine_is_ams_delta())
- omap_writel(omap_readl(ULPD_CLOCK_CTRL) |
- (1 << SDW_MCLK_INV_BIT),
- ULPD_CLOCK_CTRL);
-
- /* Turn off DSP and ARM_TIMXO. Make sure ARM_INTHCK is not divided */
- /* (on 730, bit 13 must not be cleared) */
- if (cpu_is_omap7xx())
- omap_writew(omap_readw(ARM_CKCTL) & 0x2fff, ARM_CKCTL);
- else
- omap_writew(omap_readw(ARM_CKCTL) & 0x0fff, ARM_CKCTL);
-
- /* Put DSP/MPUI into reset until needed */
- omap_writew(0, ARM_RSTCT1);
- omap_writew(1, ARM_RSTCT2);
- omap_writew(0x400, ARM_IDLECT1);
-
- /*
- * According to OMAP5910 Erratum SYS_DMA_1, bit DMACK_REQ (bit 8)
- * of the ARM_IDLECT2 register must be set to zero. The power-on
- * default value of this bit is one.
- */
- omap_writew(0x0000, ARM_IDLECT2); /* Turn LCD clock off also */
-
- /*
- * Only enable those clocks we will need, let the drivers
- * enable other clocks as necessary
- */
- clk_enable(&armper_ck.clk);
- clk_enable(&armxor_ck.clk);
- clk_enable(&armtim_ck.clk); /* This should be done by timer code */
-
- if (cpu_is_omap15xx())
- clk_enable(&arm_gpio_ck);
-
- return 0;
-}