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ARM: OMAP4: PM: Add support for OMAP4 dpll api's

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Most of the dpll api's from dpll.c are reused for OMAP4.
This patch does extend a few api's for OMAP4 support.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
This commit is contained in:
Rajendra Nayak 2009-12-08 18:47:16 -07:00 committed by paul
parent a1391d2768
commit 16975a79c8
5 changed files with 31 additions and 38 deletions
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5
arch/arm/mach-omap2/Makefile
View File

@ -6,13 +6,14 @@
obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer-gp.o
omap-2-3-common = irq.o sdrc.o omap_hwmod.o
omap-3-4-common = dpll.o
prcm-common = prcm.o powerdomain.o
clock-common = clock.o clock_common_data.o clockdomain.o
obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(prcm-common) $(clock-common)
obj-$(CONFIG_ARCH_OMAP3) += $(omap-2-3-common) $(prcm-common) $(clock-common) \
dpll.o
obj-$(CONFIG_ARCH_OMAP4) += prcm.o clock.o
$(omap-3-4-common)
obj-$(CONFIG_ARCH_OMAP4) += $(omap-3-4-common) prcm.o clock.o
obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o

5
arch/arm/mach-omap2/clock.c
View File

@ -249,6 +249,11 @@ u32 omap2_get_dpll_rate(struct clk *clk)
if (v == OMAP3XXX_EN_DPLL_LPBYPASS ||
v == OMAP3XXX_EN_DPLL_FRBYPASS)
return dd->clk_bypass->rate;
} else if (cpu_is_omap44xx()) {
if (v == OMAP4XXX_EN_DPLL_LPBYPASS ||
v == OMAP4XXX_EN_DPLL_FRBYPASS ||
v == OMAP4XXX_EN_DPLL_MNBYPASS)
return dd->clk_bypass->rate;
}
v = __raw_readl(dd->mult_div1_reg);

6
arch/arm/mach-omap2/clock.h
View File

@ -36,6 +36,12 @@
#define OMAP3XXX_EN_DPLL_FRBYPASS 0x6
#define OMAP3XXX_EN_DPLL_LOCKED 0x7
/* OMAP4xxx CM_CLKMODE_DPLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
#define OMAP4XXX_EN_DPLL_MNBYPASS 0x4
#define OMAP4XXX_EN_DPLL_LPBYPASS 0x5
#define OMAP4XXX_EN_DPLL_FRBYPASS 0x6
#define OMAP4XXX_EN_DPLL_LOCKED 0x7
/* CM_CLKEN_PLL*.EN* bit values - not all are available for every DPLL */
#define DPLL_LOW_POWER_STOP 0x1
#define DPLL_LOW_POWER_BYPASS 0x5

25
arch/arm/mach-omap2/clock44xx.c
View File

@ -22,31 +22,6 @@ struct clk_functions omap2_clk_functions = {
.clk_disable_unused = omap2_clk_disable_unused,
};
/*
* Dummy functions for DPLL control. Plan is to re-use
* existing OMAP3 dpll control functions.
*/
unsigned long omap3_dpll_recalc(struct clk *clk)
{
return 0;
}
int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate)
{
return 0;
}
int omap3_noncore_dpll_enable(struct clk *clk)
{
return 0;
}
void omap3_noncore_dpll_disable(struct clk *clk)
{
return;
}
const struct clkops clkops_noncore_dpll_ops = {
.enable = &omap3_noncore_dpll_enable,
.disable = &omap3_noncore_dpll_disable,

28
arch/arm/mach-omap2/dpll.c
View File

@ -26,9 +26,9 @@
#include <linux/limits.h>
#include <linux/bitops.h>
#include <mach/cpu.h>
#include <mach/clock.h>
#include <mach/sram.h>
#include <plat/cpu.h>
#include <plat/clock.h>
#include <plat/sram.h>
#include <asm/div64.h>
#include <asm/clkdev.h>
@ -311,10 +311,12 @@ int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
_omap3_noncore_dpll_bypass(clk);
/* Set jitter correction */
v = __raw_readl(dd->control_reg);
v &= ~dd->freqsel_mask;
v |= freqsel << __ffs(dd->freqsel_mask);
__raw_writel(v, dd->control_reg);
if (!cpu_is_omap44xx()) {
v = __raw_readl(dd->control_reg);
v &= ~dd->freqsel_mask;
v |= freqsel << __ffs(dd->freqsel_mask);
__raw_writel(v, dd->control_reg);
}
/* Set DPLL multiplier, divider */
v = __raw_readl(dd->mult_div1_reg);
@ -346,7 +348,7 @@ int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate)
{
struct clk *new_parent = NULL;
u16 freqsel;
u16 freqsel = 0;
struct dpll_data *dd;
int ret;
@ -382,9 +384,13 @@ int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate)
if (dd->last_rounded_rate == 0)
return -EINVAL;
freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n);
if (!freqsel)
WARN_ON(1);
/* No freqsel on OMAP4 */
if (!cpu_is_omap44xx()) {
freqsel = _omap3_dpll_compute_freqsel(clk,
dd->last_rounded_n);
if (!freqsel)
WARN_ON(1);
}
pr_debug("clock: %s: set rate: locking rate to %lu.\n",
clk->name, rate);