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authorPaul Walmsley <paul@pwsan.com>2012-10-30 03:56:17 +0100
committerPaul Walmsley <paul@pwsan.com>2012-11-08 20:33:08 +0100
commitb6ffa05091978c68e94d2802200f2aaa06a598d9 (patch)
tree4e2b9cc71015ba1103efe7ded485294a3aab19e7 /arch
parentARM: OMAP2+: board files: use SoC-specific system restart functions (diff)
downloadlinux-b6ffa05091978c68e94d2802200f2aaa06a598d9.tar.xz
linux-b6ffa05091978c68e94d2802200f2aaa06a598d9.zip
ARM: OMAP2xxx: APLL/CM: convert to use omap2_cm_wait_module_ready()
Convert the OMAP2xxx APLL code to use omap2_cm_wait_module_ready(), and move the low-level CM register manipulation functions to mach-omap2/cm2xxx.c. The objectives here are to remove the dependency on the deprecated omap2_cm_wait_idlest() function in mach-omap2/prcm.c, so that code can be removed later; and move low-level register accesses to the CM IP block to the CM code, which will soon be moved into drivers/. Signed-off-by: Paul Walmsley <paul@pwsan.com> Tested-by: Vaibhav Hiremath <hvaibhav@ti.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-omap2/clkt2xxx_apll.c56
-rw-r--r--arch/arm/mach-omap2/clock2420_data.c1
-rw-r--r--arch/arm/mach-omap2/clock2430_data.c1
-rw-r--r--arch/arm/mach-omap2/clock2xxx.h2
-rw-r--r--arch/arm/mach-omap2/cm-regbits-24xx.h2
-rw-r--r--arch/arm/mach-omap2/cm2xxx.c65
-rw-r--r--arch/arm/mach-omap2/cm2xxx_3xxx.h6
7 files changed, 85 insertions, 48 deletions
diff --git a/arch/arm/mach-omap2/clkt2xxx_apll.c b/arch/arm/mach-omap2/clkt2xxx_apll.c
index e3f0c1e262a7..75561a6b04d3 100644
--- a/arch/arm/mach-omap2/clkt2xxx_apll.c
+++ b/arch/arm/mach-omap2/clkt2xxx_apll.c
@@ -37,44 +37,16 @@
#define APLLS_CLKIN_13MHZ 2
#define APLLS_CLKIN_12MHZ 3
-void __iomem *cm_idlest_pll;
-
/* Private functions */
-/* Enable an APLL if off */
-static int omap2_clk_apll_enable(struct clk *clk, u32 status_mask)
-{
- u32 cval, apll_mask;
-
- apll_mask = EN_APLL_LOCKED << clk->enable_bit;
-
- cval = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
-
- if ((cval & apll_mask) == apll_mask)
- return 0; /* apll already enabled */
-
- cval &= ~apll_mask;
- cval |= apll_mask;
- omap2_cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN);
-
- omap2_cm_wait_idlest(cm_idlest_pll, status_mask,
- OMAP24XX_CM_IDLEST_VAL, __clk_get_name(clk));
-
- /*
- * REVISIT: Should we return an error code if omap2_wait_clock_ready()
- * fails?
- */
- return 0;
-}
-
-static int omap2_clk_apll96_enable(struct clk *clk)
+static int _apll96_enable(struct clk *clk)
{
- return omap2_clk_apll_enable(clk, OMAP24XX_ST_96M_APLL_MASK);
+ return omap2xxx_cm_apll96_enable();
}
-static int omap2_clk_apll54_enable(struct clk *clk)
+static int _apll54_enable(struct clk *clk)
{
- return omap2_clk_apll_enable(clk, OMAP24XX_ST_54M_APLL_MASK);
+ return omap2xxx_cm_apll54_enable();
}
static void _apll96_allow_idle(struct clk *clk)
@@ -97,28 +69,28 @@ static void _apll54_deny_idle(struct clk *clk)
omap2xxx_cm_set_apll54_disable_autoidle();
}
-/* Stop APLL */
-static void omap2_clk_apll_disable(struct clk *clk)
+static void _apll96_disable(struct clk *clk)
{
- u32 cval;
+ omap2xxx_cm_apll96_disable();
+}
- cval = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
- cval &= ~(EN_APLL_LOCKED << clk->enable_bit);
- omap2_cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN);
+static void _apll54_disable(struct clk *clk)
+{
+ omap2xxx_cm_apll54_disable();
}
/* Public data */
const struct clkops clkops_apll96 = {
- .enable = omap2_clk_apll96_enable,
- .disable = omap2_clk_apll_disable,
+ .enable = _apll96_enable,
+ .disable = _apll96_disable,
.allow_idle = _apll96_allow_idle,
.deny_idle = _apll96_deny_idle,
};
const struct clkops clkops_apll54 = {
- .enable = omap2_clk_apll54_enable,
- .disable = omap2_clk_apll_disable,
+ .enable = _apll54_enable,
+ .disable = _apll54_disable,
.allow_idle = _apll54_allow_idle,
.deny_idle = _apll54_deny_idle,
};
diff --git a/arch/arm/mach-omap2/clock2420_data.c b/arch/arm/mach-omap2/clock2420_data.c
index 49ea3b62bb09..608874b651e8 100644
--- a/arch/arm/mach-omap2/clock2420_data.c
+++ b/arch/arm/mach-omap2/clock2420_data.c
@@ -1928,7 +1928,6 @@ int __init omap2420_clk_init(void)
struct omap_clk *c;
prcm_clksrc_ctrl = OMAP2420_PRCM_CLKSRC_CTRL;
- cm_idlest_pll = OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST);
cpu_mask = RATE_IN_242X;
rate_table = omap2420_rate_table;
diff --git a/arch/arm/mach-omap2/clock2430_data.c b/arch/arm/mach-omap2/clock2430_data.c
index 6f1e26c21b91..b179b6ef4329 100644
--- a/arch/arm/mach-omap2/clock2430_data.c
+++ b/arch/arm/mach-omap2/clock2430_data.c
@@ -2027,7 +2027,6 @@ int __init omap2430_clk_init(void)
struct omap_clk *c;
prcm_clksrc_ctrl = OMAP2430_PRCM_CLKSRC_CTRL;
- cm_idlest_pll = OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST);
cpu_mask = RATE_IN_243X;
rate_table = omap2430_rate_table;
diff --git a/arch/arm/mach-omap2/clock2xxx.h b/arch/arm/mach-omap2/clock2xxx.h
index 25b8d0207527..ce809c913b6f 100644
--- a/arch/arm/mach-omap2/clock2xxx.h
+++ b/arch/arm/mach-omap2/clock2xxx.h
@@ -35,7 +35,7 @@ int omap2430_clk_init(void);
#define omap2430_clk_init() do { } while(0)
#endif
-extern void __iomem *prcm_clksrc_ctrl, *cm_idlest_pll;
+extern void __iomem *prcm_clksrc_ctrl;
extern const struct clkops clkops_omap2430_i2chs_wait;
extern const struct clkops clkops_oscck;
diff --git a/arch/arm/mach-omap2/cm-regbits-24xx.h b/arch/arm/mach-omap2/cm-regbits-24xx.h
index 686290437568..11eaf16880c4 100644
--- a/arch/arm/mach-omap2/cm-regbits-24xx.h
+++ b/arch/arm/mach-omap2/cm-regbits-24xx.h
@@ -333,7 +333,9 @@
#define OMAP24XX_EN_DPLL_MASK (0x3 << 0)
/* CM_IDLEST_CKGEN */
+#define OMAP24XX_ST_54M_APLL_SHIFT 9
#define OMAP24XX_ST_54M_APLL_MASK (1 << 9)
+#define OMAP24XX_ST_96M_APLL_SHIFT 8
#define OMAP24XX_ST_96M_APLL_MASK (1 << 8)
#define OMAP24XX_ST_54M_CLK_MASK (1 << 6)
#define OMAP24XX_ST_12M_CLK_MASK (1 << 5)
diff --git a/arch/arm/mach-omap2/cm2xxx.c b/arch/arm/mach-omap2/cm2xxx.c
index 64165013daf9..e96cd7041b66 100644
--- a/arch/arm/mach-omap2/cm2xxx.c
+++ b/arch/arm/mach-omap2/cm2xxx.c
@@ -35,6 +35,9 @@
#define OMAP2XXX_APLL_AUTOIDLE_DISABLE 0x0
#define OMAP2XXX_APLL_AUTOIDLE_LOW_POWER_STOP 0x3
+/* CM_IDLEST_PLL bit value offset for APLLs (OMAP2xxx only) */
+#define EN_APLL_LOCKED 3
+
static const u8 omap2xxx_cm_idlest_offs[] = {
CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3, OMAP24XX_CM_IDLEST4
};
@@ -99,7 +102,7 @@ void omap2xxx_cm_set_dpll_auto_low_power_stop(void)
}
/*
- * APLL autoidle control
+ * APLL control
*/
static void _omap2xxx_set_apll_autoidle(u8 m, u32 mask)
@@ -136,6 +139,65 @@ void omap2xxx_cm_set_apll96_auto_low_power_stop(void)
OMAP24XX_AUTO_96M_MASK);
}
+/* Enable an APLL if off */
+static int _omap2xxx_apll_enable(u8 enable_bit, u8 status_bit)
+{
+ u32 v, m;
+
+ m = EN_APLL_LOCKED << enable_bit;
+
+ v = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
+ if (v & m)
+ return 0; /* apll already enabled */
+
+ v |= m;
+ omap2_cm_write_mod_reg(v, PLL_MOD, CM_CLKEN);
+
+ omap2xxx_cm_wait_module_ready(PLL_MOD, 1, status_bit);
+
+ /*
+ * REVISIT: Should we return an error code if
+ * omap2xxx_cm_wait_module_ready() fails?
+ */
+ return 0;
+}
+
+/* Stop APLL */
+static void _omap2xxx_apll_disable(u8 enable_bit)
+{
+ u32 v;
+
+ v = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
+ v &= ~(EN_APLL_LOCKED << enable_bit);
+ omap2_cm_write_mod_reg(v, PLL_MOD, CM_CLKEN);
+}
+
+/* Enable an APLL if off */
+int omap2xxx_cm_apll54_enable(void)
+{
+ return _omap2xxx_apll_enable(OMAP24XX_EN_54M_PLL_SHIFT,
+ OMAP24XX_ST_54M_APLL_SHIFT);
+}
+
+/* Enable an APLL if off */
+int omap2xxx_cm_apll96_enable(void)
+{
+ return _omap2xxx_apll_enable(OMAP24XX_EN_96M_PLL_SHIFT,
+ OMAP24XX_ST_96M_APLL_SHIFT);
+}
+
+/* Stop APLL */
+void omap2xxx_cm_apll54_disable(void)
+{
+ _omap2xxx_apll_disable(OMAP24XX_EN_54M_PLL_SHIFT);
+}
+
+/* Stop APLL */
+void omap2xxx_cm_apll96_disable(void)
+{
+ _omap2xxx_apll_disable(OMAP24XX_EN_96M_PLL_SHIFT);
+}
+
/*
*
*/
@@ -252,4 +314,3 @@ struct clkdm_ops omap2_clkdm_operations = {
.clkdm_clk_enable = omap2xxx_clkdm_clk_enable,
.clkdm_clk_disable = omap2xxx_clkdm_clk_disable,
};
-
diff --git a/arch/arm/mach-omap2/cm2xxx_3xxx.h b/arch/arm/mach-omap2/cm2xxx_3xxx.h
index 0e26bb1bf7e2..f74a5d1b803f 100644
--- a/arch/arm/mach-omap2/cm2xxx_3xxx.h
+++ b/arch/arm/mach-omap2/cm2xxx_3xxx.h
@@ -96,6 +96,11 @@ static inline u32 omap2_cm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
return omap2_cm_rmw_mod_reg_bits(bits, 0x0, module, idx);
}
+extern int omap2xxx_cm_apll54_enable(void);
+extern void omap2xxx_cm_apll54_disable(void);
+extern int omap2xxx_cm_apll96_enable(void);
+extern void omap2xxx_cm_apll96_disable(void);
+
#endif
/* CM register bits shared between 24XX and 3430 */
@@ -111,5 +116,4 @@ static inline u32 omap2_cm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
/* CM_IDLEST_GFX */
#define OMAP_ST_GFX_MASK (1 << 0)
-
#endif