3430ES2 clock: separate 3430ES1/3430ES2 rates in clock code

On the OMAP3430 architecture, some DPLL3 rates are only available on
3430ES2.  We wish to avoid inadvertently selecting these on 3430ES1.
So we need some way to mark these rates as being 3430ES2-only.  To do
so, add new rate flag RATE_IN_3430ES2, to be used for rates that only
exist on 3430ES2.  (I'm not aware of any 3430ES1-only rates, so, no
corresponding 3430ES1 flag is currently defined.)  RATE_IN_343X is
still present and used for rates which exist on all 343X-level
devices.  The current code assumes that production rates will be
identical to 3430ES2 rates, but this is easy enough to change if
necessary.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/clock34xx.c

@@ -177,11 +177,14 @@ int __init omap2_clk_init(void)
 		 * Update this if there are further clock changes between ES2
 		 * and production parts
 		 */
-		if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0))
+		if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0)) {
+			/* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */
 			cpu_clkflg |= CLOCK_IN_OMAP3430ES1;
-		else
+		} else {
+			cpu_mask |= RATE_IN_3430ES2;
 			cpu_clkflg |= CLOCK_IN_OMAP3430ES2;
 		}
+	}
 
 	clk_init(&omap2_clk_functions);
 

arch/arm/mach-omap2/clock34xx.h

@@ -106,9 +106,8 @@ static const struct clksel_rate osc_sys_13m_rates[] = {
 	{ .div = 0 }
 };
 
-/* 3430ES2 only */
 static const struct clksel_rate osc_sys_16_8m_rates[] = {
-	{ .div = 1, .val = 5, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 1, .val = 5, .flags = RATE_IN_3430ES2 | DEFAULT_RATE },
 	{ .div = 0 }
 };
 
@@ -308,8 +307,43 @@ static const struct clksel_rate div16_dpll_rates[] = {
 	{ .div = 0 }
 };
 
-static const struct clksel div2_dpll3m2_clksel[] = {
-	{ .parent = &dpll3_ck, .rates = div2_rates },
+static const struct clksel_rate div31_dpll3_rates[] = {
+	{ .div = 1, .val = 1, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 2, .val = 2, .flags = RATE_IN_343X },
+	{ .div = 3, .val = 3, .flags = RATE_IN_3430ES2 },
+	{ .div = 4, .val = 4, .flags = RATE_IN_3430ES2 },
+	{ .div = 5, .val = 5, .flags = RATE_IN_3430ES2 },
+	{ .div = 6, .val = 6, .flags = RATE_IN_3430ES2 },
+	{ .div = 7, .val = 7, .flags = RATE_IN_3430ES2 },
+	{ .div = 8, .val = 8, .flags = RATE_IN_3430ES2 },
+	{ .div = 9, .val = 9, .flags = RATE_IN_3430ES2 },
+	{ .div = 10, .val = 10, .flags = RATE_IN_3430ES2 },
+	{ .div = 11, .val = 11, .flags = RATE_IN_3430ES2 },
+	{ .div = 12, .val = 12, .flags = RATE_IN_3430ES2 },
+	{ .div = 13, .val = 13, .flags = RATE_IN_3430ES2 },
+	{ .div = 14, .val = 14, .flags = RATE_IN_3430ES2 },
+	{ .div = 15, .val = 15, .flags = RATE_IN_3430ES2 },
+	{ .div = 16, .val = 16, .flags = RATE_IN_3430ES2 },
+	{ .div = 17, .val = 17, .flags = RATE_IN_3430ES2 },
+	{ .div = 18, .val = 18, .flags = RATE_IN_3430ES2 },
+	{ .div = 19, .val = 19, .flags = RATE_IN_3430ES2 },
+	{ .div = 20, .val = 20, .flags = RATE_IN_3430ES2 },
+	{ .div = 21, .val = 21, .flags = RATE_IN_3430ES2 },
+	{ .div = 22, .val = 22, .flags = RATE_IN_3430ES2 },
+	{ .div = 23, .val = 23, .flags = RATE_IN_3430ES2 },
+	{ .div = 24, .val = 24, .flags = RATE_IN_3430ES2 },
+	{ .div = 25, .val = 25, .flags = RATE_IN_3430ES2 },
+	{ .div = 26, .val = 26, .flags = RATE_IN_3430ES2 },
+	{ .div = 27, .val = 27, .flags = RATE_IN_3430ES2 },
+	{ .div = 28, .val = 28, .flags = RATE_IN_3430ES2 },
+	{ .div = 29, .val = 29, .flags = RATE_IN_3430ES2 },
+	{ .div = 30, .val = 30, .flags = RATE_IN_3430ES2 },
+	{ .div = 31, .val = 31, .flags = RATE_IN_3430ES2 },
+	{ .div = 0 },
+};
+
+static const struct clksel div31_dpll3m2_clksel[] = {
+	{ .parent = &dpll3_ck, .rates = div31_dpll3_rates },
 	{ .parent = NULL }
 };
 
@@ -324,7 +358,7 @@ static struct clk dpll3_m2_ck = {
 	.init		= &omap2_init_clksel_parent,
 	.clksel_reg	= OMAP_CM_REGADDR(PLL_MOD, CM_CLKSEL1),
 	.clksel_mask	= OMAP3430_CORE_DPLL_CLKOUT_DIV_MASK,
-	.clksel		= div2_dpll3m2_clksel,
+	.clksel		= div31_dpll3m2_clksel,
 	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES |
 				PARENT_CONTROLS_CLOCK,
 	.recalc		= &omap2_clksel_recalc,

arch/arm/mach-omap2/cm_regbits_34xx.h

@@ -374,8 +374,9 @@
 #define OMAP3430_AUTO_CORE_DPLL_MASK			(0x7 << 0)
 
 /* CM_CLKSEL1_PLL */
+/* Note that OMAP3430_CORE_DPLL_CLKOUT_DIV_MASK was (0x3 << 27) on 3430ES1 */
 #define OMAP3430_CORE_DPLL_CLKOUT_DIV_SHIFT		27
-#define OMAP3430_CORE_DPLL_CLKOUT_DIV_MASK		(0x3 << 27)
+#define OMAP3430_CORE_DPLL_CLKOUT_DIV_MASK		(0x1f << 27)
 #define OMAP3430_CORE_DPLL_MULT_SHIFT			16
 #define OMAP3430_CORE_DPLL_MULT_MASK			(0x7ff << 16)
 #define OMAP3430_CORE_DPLL_DIV_SHIFT			8

include/asm-arm/arch-omap/clock.h

@@ -138,7 +138,9 @@ extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
 #define DEFAULT_RATE		(1 << 0)
 #define RATE_IN_242X		(1 << 1)
 #define RATE_IN_243X		(1 << 2)
-#define RATE_IN_343X            (1 << 3)
+#define RATE_IN_343X		(1 << 3)	/* rates common to all 343X */
+#define RATE_IN_3430ES2		(1 << 4)	/* 3430ES2 rates only */
+
 #define RATE_IN_24XX		(RATE_IN_242X | RATE_IN_243X)