[PATCH 2/2] 3430 clock: add emulation clocks

[Paul Walmsley <paul@pwsan.com>]

[-- Attachment #1: add_emu_clks.patch --]
[-- Type: text/plain, Size: 7367 bytes --]

Add clocks for the EMU domain for OMAP3430.  These clocks are not
well-documented in the TRM, beyond register bit settings.  Some
information is available in the ARM Cortex-A8 TRM, section 10.1.  Also
rename existing emul_* clocks to emu_* to conform with recent TRMs.

Signed-off-by: Paul Walmsley <paul@pwsan.com>

---
 arch/arm/mach-omap2/clock34xx.h |  173 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 165 insertions(+), 8 deletions(-)

Index: linux-omap/arch/arm/mach-omap2/clock34xx.h
===================================================================
--- linux-omap.orig/arch/arm/mach-omap2/clock34xx.h	2007-10-24 23:47:22.000000000 -0600
+++ linux-omap/arch/arm/mach-omap2/clock34xx.h	2007-10-24 23:47:24.000000000 -0600
@@ -235,6 +235,17 @@
 	.recalc		= &omap3_dpll_recalc,
 };
 
+/*
+ * REVISIT: This clock is never specifically defined in the 3430 TRM,
+ * although it is referenced - so this is a guess
+ */
+static struct clk emu_mpu_alwon_ck = {
+	.name		= "emu_mpu_alwon_ck",
+	.parent		= &dpll1_ck,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES,
+	.recalc		= &followparent_recalc,
+};
+
 /* DPLL2 */
 /* IVA2 clock source */
 /* Type: DPLL */
@@ -371,14 +382,14 @@
 	{ .parent = NULL }
 };
 
-static struct clk emul_core_alwon_ck = {
-	.name		= "emul_core_alwon_ck",
+static struct clk emu_core_alwon_ck = {
+	.name		= "emu_core_alwon_ck",
 	.parent		= &dpll3_x2_ck,
 	.init		= &omap2_init_clksel_parent,
 	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
 	.clksel_mask	= OMAP3430_DIV_DPLL3_MASK,
 	.clksel		= div16_dpll3_clksel,
-	.flags		= CLOCK_IN_OMAP343X,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES,
 	.recalc		= &followparent_recalc,
 };
 
@@ -571,10 +582,10 @@
 	.recalc		= &omap2_clksel_recalc,
 };
 
-static struct clk emul_per_alwon_ck = {
-	.name		= "emul_per_alwon_ck",
+static struct clk emu_per_alwon_ck = {
+	.name		= "emu_per_alwon_ck",
 	.parent		= &dpll4_m6x2_ck,
-	.flags		= CLOCK_IN_OMAP343X,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES,
 	.recalc		= &followparent_recalc,
 };
 
@@ -2001,6 +2012,145 @@
 	.recalc		= &omap2_clksel_recalc,
 };
 
+/* EMU clocks */
+
+/* More information: ARM Cortex-A8 Technical Reference Manual, sect 10.1 */
+
+static const struct clksel_rate emu_src_sys_rates[] = {
+	{ .div = 1, .val = 0, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 0 },
+};
+
+static const struct clksel_rate emu_src_core_rates[] = {
+	{ .div = 1, .val = 1, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 0 },
+};
+
+static const struct clksel_rate emu_src_per_rates[] = {
+	{ .div = 1, .val = 2, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 0 },
+};
+
+static const struct clksel_rate emu_src_mpu_rates[] = {
+	{ .div = 1, .val = 3, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 0 },
+};
+
+static const struct clksel emu_src_clksel[] = {
+	{ .parent = &sys_ck,		.rates = emu_src_sys_rates },
+	{ .parent = &emu_core_alwon_ck, .rates = emu_src_core_rates },
+	{ .parent = &emu_per_alwon_ck,	.rates = emu_src_per_rates },
+	{ .parent = &emu_mpu_alwon_ck,	.rates = emu_src_mpu_rates },
+	{ .parent = NULL },
+};
+
+/*
+ * Like the clkout_src clocks, emu_src_clk is a virtual clock, existing only
+ * to switch the source of some of the EMU clocks.
+ * XXX Are there CLKEN bits for these EMU clks?
+ */
+static struct clk emu_src_ck = {
+	.name		= "emu_src_ck",
+	.init		= &omap2_init_clksel_parent,
+	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
+	.clksel_mask	= OMAP3430_MUX_CTRL_MASK,
+	.clksel		= emu_src_clksel,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES | ALWAYS_ENABLED,
+	.recalc		= &omap2_clksel_recalc,
+};
+
+static const struct clksel_rate pclk_emu_rates[] = {
+	{ .div = 2, .val = 2, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 3, .val = 3, .flags = RATE_IN_343X },
+	{ .div = 4, .val = 4, .flags = RATE_IN_343X },
+	{ .div = 6, .val = 6, .flags = RATE_IN_343X },
+	{ .div = 0 },
+};
+
+static const struct clksel pclk_emu_clksel[] = {
+	{ .parent = &emu_src_ck, .rates = pclk_emu_rates },
+	{ .parent = NULL },
+};
+
+static struct clk pclk_fck = {
+	.name		= "pclk_fck",
+	.init		= &omap2_init_clksel_parent,
+	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
+	.clksel_mask	= OMAP3430_CLKSEL_PCLK_MASK,
+	.clksel		= pclk_emu_clksel,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES | ALWAYS_ENABLED,
+	.recalc		= &omap2_clksel_recalc,
+};
+
+static const struct clksel_rate pclkx2_emu_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_343X },
+	{ .div = 0 },
+};
+
+static const struct clksel pclkx2_emu_clksel[] = {
+	{ .parent = &emu_src_ck, .rates = pclkx2_emu_rates },
+	{ .parent = NULL },
+};
+
+static struct clk pclkx2_fck = {
+	.name		= "pclkx2_fck",
+	.init		= &omap2_init_clksel_parent,
+	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
+	.clksel_mask	= OMAP3430_CLKSEL_PCLKX2_MASK,
+	.clksel		= pclkx2_emu_clksel,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES | ALWAYS_ENABLED,
+	.recalc		= &omap2_clksel_recalc,
+};
+
+static const struct clksel atclk_emu_clksel[] = {
+	{ .parent = &emu_src_ck, .rates = div2_rates },
+	{ .parent = NULL },
+};
+
+static struct clk atclk_fck = {
+	.name		= "atclk_fck",
+	.init		= &omap2_init_clksel_parent,
+	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
+	.clksel_mask	= OMAP3430_CLKSEL_ATCLK_MASK,
+	.clksel		= atclk_emu_clksel,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES | ALWAYS_ENABLED,
+	.recalc		= &omap2_clksel_recalc,
+};
+
+static struct clk traceclk_src_fck = {
+	.name		= "traceclk_src_fck",
+	.init		= &omap2_init_clksel_parent,
+	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
+	.clksel_mask	= OMAP3430_TRACE_MUX_CTRL_MASK,
+	.clksel		= emu_src_clksel,
+	.flags		= CLOCK_IN_OMAP343X | RATE_PROPAGATES | ALWAYS_ENABLED,
+	.recalc		= &omap2_clksel_recalc,
+};
+
+static const struct clksel_rate traceclk_rates[] = {
+	{ .div = 1, .val = 1, .flags = RATE_IN_343X | DEFAULT_RATE },
+	{ .div = 2, .val = 2, .flags = RATE_IN_343X },
+	{ .div = 4, .val = 4, .flags = RATE_IN_343X },
+	{ .div = 0 },
+};
+
+static const struct clksel traceclk_clksel[] = {
+	{ .parent = &traceclk_src_fck, .rates = traceclk_rates },
+	{ .parent = NULL },
+};
+
+static struct clk traceclk_fck = {
+	.name		= "traceclk_fck",
+	.init		= &omap2_init_clksel_parent,
+	.clksel_reg	= OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
+	.clksel_mask	= OMAP3430_CLKSEL_TRACECLK_MASK,
+	.clksel		= traceclk_clksel,
+	.flags		= CLOCK_IN_OMAP343X | ALWAYS_ENABLED,
+	.recalc		= &omap2_clksel_recalc,
+};
+
 /* SR clocks */
 
 /* SmartReflex fclk (VDD1) */
@@ -2060,6 +2210,7 @@
 	&sys_altclk,
 	&sys_clkout1,
 	&dpll1_ck,
+	&emu_mpu_alwon_ck,
 	&dpll2_ck,
 	&dpll3_ck,
 	&core_ck,
@@ -2067,7 +2218,7 @@
 	&dpll3_m2_ck,
 	&dpll3_m2x2_ck,
 	&dpll3_m3x2_ck,
-	&emul_core_alwon_ck,
+	&emu_core_alwon_ck,
 	&dpll4_ck,
 	&dpll4_x2_ck,
 	&omap_96m_alwon_fck,
@@ -2081,7 +2232,7 @@
 	&dpll4_m4x2_ck,
 	&dpll4_m5x2_ck,
 	&dpll4_m6x2_ck,
-	&emul_per_alwon_ck,
+	&emu_per_alwon_ck,
 	&clkout2_src_ck,
 	&sys_clkout2,
 	&corex2_fck,
@@ -2216,6 +2367,12 @@
 	&mcbsp2_fck,
 	&mcbsp3_fck,
 	&mcbsp4_fck,
+	&emu_src_ck,
+	&pclk_fck,
+	&pclkx2_fck,
+	&atclk_fck,
+	&traceclk_src_fck,
+	&traceclk_fck,
 	&sr1_fck,
 	&sr2_fck,
 	&sr_l4_ick,

--