From: Richard Woodruff <r-woodruff2@xxxxxx>
DPLL4 for 3630 introduces a changed block called j type dpll, requiring
special divisor bits and additional reg fields. To allow for silicons to
use this, this is introduced as a flag and is enabled for 3630 silicon.
OMAP4 also has j type dpll for usb.
Tested with 3630 ZOOM3 and OMAP3430 ZOOM2
Cc: Paul Walmsley <paul@xxxxxxxxx>
Signed-off-by: Richard Woodruff <r-woodruff2@xxxxxx>
Signed-off-by: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Vishwanath BS <Vishwanath.bs@xxxxxx>
---
arch/arm/mach-omap2/clock.h | 4 ++
arch/arm/mach-omap2/clock34xx_data.c | 32 ++++++++++++++++++++-
arch/arm/mach-omap2/clock44xx_data.c | 1 +
arch/arm/mach-omap2/cm-regbits-34xx.h | 5 +++
arch/arm/mach-omap2/dpll3xxx.c | 47 ++++++++++++++++++++++++++++++-
arch/arm/plat-omap/include/plat/clock.h | 5 +++
6 files changed, 92 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index fb17833..6f6b110 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -47,6 +47,10 @@
#define DPLL_LOW_POWER_BYPASS 0x5
#define DPLL_LOCKED 0x7
+/* DPLL Type and DCO Selection Flags */
+#define DPLL_J_TYPE 0x1
+#define DPLL_NO_DCO_SEL 0x2
+
int omap2_clk_enable(struct clk *clk);
void omap2_clk_disable(struct clk *clk);
long omap2_clk_round_rate(struct clk *clk, unsigned long rate);
diff --git a/arch/arm/mach-omap2/clock34xx_data.c b/arch/arm/mach-omap2/clock34xx_data.c
index 8728f1f..a6ef778
--- a/arch/arm/mach-omap2/clock34xx_data.c
+++ b/arch/arm/mach-omap2/clock34xx_data.c
@@ -38,6 +38,7 @@
/* Maximum DPLL multiplier, divider values for OMAP3 */
#define OMAP3_MAX_DPLL_MULT 2048
+#define OMAP3630_MAX_JTYPE_DPLL_MULT 4095
#define OMAP3_MAX_DPLL_DIV 128
/*
@@ -529,7 +530,8 @@ static struct clk emu_core_alwon_ck = {
/* DPLL4 */
/* Supplies 96MHz, 54Mhz TV DAC, DSS fclk, CAM sensor clock, emul trace clk */
/* Type: DPLL */
-static struct dpll_data dpll4_dd = {
+static struct dpll_data dpll4_dd;
+static struct dpll_data dpll4_dd_34xx __initdata = {
.mult_div1_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKSEL2),
.mult_mask = OMAP3430_PERIPH_DPLL_MULT_MASK,
.div1_mask = OMAP3430_PERIPH_DPLL_DIV_MASK,
@@ -552,6 +554,29 @@ static struct dpll_data dpll4_dd = {
.rate_tolerance = DEFAULT_DPLL_RATE_TOLERANCE
};
+static struct dpll_data dpll4_dd_3630 __initdata = {
+ .mult_div1_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKSEL2),
+ .mult_mask = OMAP3630_PERIPH_DPLL_MULT_MASK,
+ .div1_mask = OMAP3430_PERIPH_DPLL_DIV_MASK,
+ .clk_bypass = &sys_ck,
+ .clk_ref = &sys_ck,
+ .control_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKEN),
+ .enable_mask = OMAP3430_EN_PERIPH_DPLL_MASK,
+ .modes = (1 << DPLL_LOW_POWER_STOP) | (1 << DPLL_LOCKED),
+ .auto_recal_bit = OMAP3430_EN_PERIPH_DPLL_DRIFTGUARD_SHIFT,
+ .recal_en_bit = OMAP3430_PERIPH_DPLL_RECAL_EN_SHIFT,
+ .recal_st_bit = OMAP3430_PERIPH_DPLL_ST_SHIFT,
+ .autoidle_reg = OMAP_CM_REGADDR(PLL_MOD, CM_AUTOIDLE),
+ .autoidle_mask = OMAP3430_AUTO_PERIPH_DPLL_MASK,
+ .idlest_reg = OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST),
+ .idlest_mask = OMAP3430_ST_PERIPH_CLK_MASK,
+ .max_multiplier = OMAP3630_MAX_JTYPE_DPLL_MULT,
+ .min_divider = 1,
+ .max_divider = OMAP3_MAX_DPLL_DIV,
+ .rate_tolerance = DEFAULT_DPLL_RATE_TOLERANCE,
+ .flags = DPLL_J_TYPE
+};
+
static struct clk dpll4_ck = {
.name = "dpll4_ck",
.ops = &omap3_clkops_noncore_dpll_ops,
@@ -3240,6 +3265,11 @@ int __init omap3xxx_clk_init(void)
}
}
+ if (cpu_is_omap3630())
+ dpll4_dd = dpll4_dd_3630;
+ else
+ dpll4_dd = dpll4_dd_34xx;
+
clk_init(&omap2_clk_functions);
for (c = omap3xxx_clks; c < omap3xxx_clks + ARRAY_SIZE(omap3xxx_clks); c++)
diff --git a/arch/arm/mach-omap2/clock44xx_data.c b/arch/arm/mach-omap2/clock44xx_data.c
index 86af31d..8d8b573 100644
--- a/arch/arm/mach-omap2/clock44xx_data.c
+++ b/arch/arm/mach-omap2/clock44xx_data.c
@@ -980,6 +980,7 @@ static struct dpll_data dpll_usb_dd = {
.max_multiplier = OMAP4430_MAX_DPLL_MULT,
.max_divider = OMAP4430_MAX_DPLL_DIV,
.min_divider = 1,
+ .flags = DPLL_J_TYPE | DPLL_NO_DCO_SEL
};
diff --git a/arch/arm/mach-omap2/cm-regbits-34xx.h b/arch/arm/mach-omap2/cm-regbits-34xx.h
index 6923deb..ab9b909
--- a/arch/arm/mach-omap2/cm-regbits-34xx.h
+++ b/arch/arm/mach-omap2/cm-regbits-34xx.h
@@ -517,8 +517,13 @@
/* CM_CLKSEL2_PLL */
#define OMAP3430_PERIPH_DPLL_MULT_SHIFT 8
#define OMAP3430_PERIPH_DPLL_MULT_MASK (0x7ff << 8)
+#define OMAP3630_PERIPH_DPLL_MULT_MASK (0xfff << 8)
#define OMAP3430_PERIPH_DPLL_DIV_SHIFT 0
#define OMAP3430_PERIPH_DPLL_DIV_MASK (0x7f << 0)
+#define OMAP3630_PERIPH_DPLL_DCO_SEL_SHIFT 21
+#define OMAP3630_PERIPH_DPLL_DCO_SEL_MASK (0x7 << 21)
+#define OMAP3630_PERIPH_DPLL_SD_DIV_SHIFT 24
+#define OMAP3630_PERIPH_DPLL_SD_DIV_MASK (0xff << 24)
/* CM_CLKSEL3_PLL */
#define OMAP3430_DIV_96M_SHIFT 0
diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index 2b559fc..dd66871 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/arch/arm/mach-omap2/dpll3xxx.c
@@ -225,6 +225,42 @@ static int _omap3_noncore_dpll_stop(struct clk *clk)
return 0;
}
+/**
+ * lookup_dco_sddiv - Set j-type DPLL4 compensation variables
+ * @clk: pointer to a DPLL struct clk
+ * @dco: digital control oscillator selector
+ * @sd_div: target sigma-delta divider
+ * @m: DPLL multiplier to set
+ * @n: DPLL divider to set
+ */
+static void lookup_dco_sddiv(struct clk *clk, u8 *dco, u8 *sd_div, u16
+ m, u8 n)
+ {
+ unsigned long fint, clkinp, sd; /* watch out for overflow */
+ int mod1, mod2;
+
+ clkinp = clk->parent->rate;
+ fint = (clkinp / n) * m;
+
+ if (fint < 1000000000)
+ *dco = 2;
+ else
+ *dco = 4;
+ /*
+ * target sigma-delta to near 250MHz
+ * sd = ceil[(m/(n+1)) * (clkinp_MHz / 250)]
+ */
+ clkinp /= 100000; /* shift from MHz to 10*Hz for 38.4 and 19.2*/
+ mod1 = (clkinp * m) % (250 * n);
+ sd = (clkinp * m) / (250 * n);
+ mod2 = sd % 10;
+ sd /= 10;
+
+ if (mod1 || mod2)
+ sd++;
+ *sd_div = sd;
+}
+
/*
* _omap3_noncore_dpll_program - set non-core DPLL M,N values directly
* @clk: struct clk * of DPLL to set
@@ -256,6 +292,15 @@ static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
v &= ~(dd->mult_mask | dd->div1_mask);
v |= m << __ffs(dd->mult_mask);
v |= (n - 1) << __ffs(dd->div1_mask);
+
+ if ((dd->flags & DPLL_J_TYPE) && !(dd->flags & DPLL_NO_DCO_SEL)) {
+ u8 dco, sd_div;
+ lookup_dco_sddiv(clk, &dco, &sd_div, m, n);
+ v &= ~(OMAP3630_PERIPH_DPLL_DCO_SEL_MASK
+ | OMAP3630_PERIPH_DPLL_SD_DIV_MASK);
+ v |= dco << __ffs(OMAP3630_PERIPH_DPLL_DCO_SEL_MASK);
+ v |= sd_div << __ffs(OMAP3630_PERIPH_DPLL_SD_DIV_MASK);
+ }
__raw_writel(v, dd->mult_div1_reg);
/* We let the clock framework set the other output dividers later */
@@ -533,7 +578,7 @@ unsigned long omap3_clkoutx2_recalc(struct clk *clk)
v = __raw_readl(dd->control_reg) & dd->enable_mask;
v >>= __ffs(dd->enable_mask);
- if (v != OMAP3XXX_EN_DPLL_LOCKED)
+ if ((v != OMAP3XXX_EN_DPLL_LOCKED) || (dd->flags & DPLL_J_TYPE))
rate = clk->parent->rate;
else
rate = clk->parent->rate * 2;
diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h
index 8a86df4..d135ae3 100644
--- a/arch/arm/plat-omap/include/plat/clock.h
+++ b/arch/arm/plat-omap/include/plat/clock.h
@@ -39,6 +39,10 @@ struct clksel {
const struct clksel_rate *rates;
};
+/*
+ * A new flag called flag has been added which indiciates what is the type
+ * of dpll (like j_type, no_dco_sel)
+ */
struct dpll_data {
void __iomem *mult_div1_reg;
u32 mult_mask;
@@ -65,6 +69,7 @@ struct dpll_data {
u8 auto_recal_bit;
u8 recal_en_bit;
u8 recal_st_bit;
+ u8 flags;
# endif
};
--
1.5.6.3
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