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authorPaul Walmsley <paul@pwsan.com>2009-07-24 19:44:04 -0600
committerpaul <paul@twilight.(none)>2009-07-24 20:10:36 -0600
commit3dc2197579089c5b74c7fba666c8ccf1a449afb4 (patch)
treee1f2da76834733d9a0dc0a1799a683d46ba86d0d /arch/arm
parent72350b29a4c0debfc27c2edbeed9b4ff3f935dd4 (diff)
OMAP2 clock: 2430 I2CHS uses non-standard CM_IDLEST register
OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE [1]. Fix by implementing a custom clkops .find_idlest function to return the correct slave IDLEST register. ... 1. OMAP2430 Multimedia Device Package-on-Package (POP) Silicon Revision 2.1 (Rev. V) Technical Reference Manual, tables 4-99 and 4-105. Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-omap2/clock24xx.c37
-rw-r--r--arch/arm/mach-omap2/clock24xx.h4
2 files changed, 37 insertions, 4 deletions
diff --git a/arch/arm/mach-omap2/clock24xx.c b/arch/arm/mach-omap2/clock24xx.c
index 44de0271fc2..bc5d3ac6661 100644
--- a/arch/arm/mach-omap2/clock24xx.c
+++ b/arch/arm/mach-omap2/clock24xx.c
@@ -30,6 +30,7 @@
#include <mach/clock.h>
#include <mach/sram.h>
+#include <mach/prcm.h>
#include <asm/div64.h>
#include <asm/clkdev.h>
@@ -43,6 +44,18 @@
static const struct clkops clkops_oscck;
static const struct clkops clkops_fixed;
+static void omap2430_clk_i2chs_find_idlest(struct clk *clk,
+ void __iomem **idlest_reg,
+ u8 *idlest_bit);
+
+/* 2430 I2CHS has non-standard IDLEST register */
+static const struct clkops clkops_omap2430_i2chs_wait = {
+ .enable = omap2_dflt_clk_enable,
+ .disable = omap2_dflt_clk_disable,
+ .find_idlest = omap2430_clk_i2chs_find_idlest,
+ .find_companion = omap2_clk_dflt_find_companion,
+};
+
#include "clock24xx.h"
struct omap_clk {
@@ -240,6 +253,26 @@ static void __iomem *prcm_clksrc_ctrl;
*-------------------------------------------------------------------------*/
/**
+ * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ *
+ * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the
+ * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE. This custom function
+ * passes back the correct CM_IDLEST register address for I2CHS
+ * modules. No return value.
+ */
+static void omap2430_clk_i2chs_find_idlest(struct clk *clk,
+ void __iomem **idlest_reg,
+ u8 *idlest_bit)
+{
+ *idlest_reg = OMAP_CM_REGADDR(CORE_MOD, CM_IDLEST);
+ *idlest_bit = clk->enable_bit;
+}
+
+
+/**
* omap2xxx_clk_get_core_rate - return the CORE_CLK rate
* @clk: pointer to the combined dpll_ck + core_ck (currently "dpll_ck")
*
@@ -325,8 +358,8 @@ static int omap2_clk_fixed_enable(struct clk *clk)
else if (clk == &apll54_ck)
cval = OMAP24XX_ST_54M_APLL;
- omap2_wait_clock_ready(OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST), cval,
- clk->name);
+ omap2_cm_wait_idlest(OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST), cval,
+ clk->name);
/*
* REVISIT: Should we return an error code if omap2_wait_clock_ready()
diff --git a/arch/arm/mach-omap2/clock24xx.h b/arch/arm/mach-omap2/clock24xx.h
index 458f00cdcbe..d19cf7a7d8d 100644
--- a/arch/arm/mach-omap2/clock24xx.h
+++ b/arch/arm/mach-omap2/clock24xx.h
@@ -2337,7 +2337,7 @@ static struct clk i2c2_fck = {
static struct clk i2chs2_fck = {
.name = "i2c_fck",
- .ops = &clkops_omap2_dflt_wait,
+ .ops = &clkops_omap2430_i2chs_wait,
.id = 2,
.parent = &func_96m_ck,
.clkdm_name = "core_l4_clkdm",
@@ -2370,7 +2370,7 @@ static struct clk i2c1_fck = {
static struct clk i2chs1_fck = {
.name = "i2c_fck",
- .ops = &clkops_omap2_dflt_wait,
+ .ops = &clkops_omap2430_i2chs_wait,
.id = 1,
.parent = &func_96m_ck,
.clkdm_name = "core_l4_clkdm",