[PATCH v2 12/13] OMAP clock: drop RATE_FIXED clock flag

Paul Walmsley
2010-02-16T01:02:10Z

The RATE_FIXED clock flag is pointless. In the OMAP1 clock code, it
simply causes the omap1_clk_round_rate() function to return the
current rate of the clock. omap1_clk_round_rate(), however, should
never be called for a fixed-rate clock, since none of these clocks
have a .round_rate function pointer set in their struct clk records.
Similarly, in the OMAP2+ clock code, the RATE_FIXED flag just causes
the clock code to emit a warning if the OMAP clock maintainer was
foolish enough to add a .round_rate function pointer to a fixed-rate
clock. "Doctor, it hurts when I pretend that a fixed-rate clock is
rate-changeable." "Then don't pretend that a fixed-rate clock is
rate-changeable." It has no functional value. This patch drops the
RATE_FIXED clock flag, removing it from all clocks that are so marked.

This second version of the patch also drops the flag from the OMAP3
clocks - an oversight in the first revision.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Richard Woodruff <r-woodruff2@ti.com>
---
arch/arm/mach-omap1/clock.c | 5 +----
arch/arm/mach-omap1/clock_data.c | 25 +++++++++----------------
arch/arm/mach-omap2/clkt_clksel.c | 4 ----
arch/arm/mach-omap2/clock2420_data.c | 7 ++-----
arch/arm/mach-omap2/clock2430_data.c | 7 ++-----
arch/arm/mach-omap2/clock3xxx_data.c | 11 -----------
arch/arm/plat-omap/include/plat/clock.h | 13 ++++++-------
7 files changed, 20 insertions(+), 52 deletions(-)

diff --git a/arch/arm/mach-omap1/clock.c b/arch/arm/mach-omap1/clock.c
index 3e052f6..0ba044d 100644
--- a/arch/arm/mach-omap1/clock.c
+++ b/arch/arm/mach-omap1/clock.c
@@ -1,7 +1,7 @@
/*
* linux/arch/arm/mach-omap1/clock.c
*
- * Copyright (C) 2004 - 2005, 2009 Nokia corporation
+ * Copyright (C) 2004 - 2005, 2009-2010 Nokia Corporation
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
*
* Modified to use omap shared clock framework by
@@ -571,9 +571,6 @@ const struct clkops clkops_uart = {

long omap1_clk_round_rate(struct clk *clk, unsigned long rate)
{
- if (clk->flags & RATE_FIXED)
- return clk->rate;
-
if (clk->round_rate != NULL)
return clk->round_rate(clk, rate);

diff --git a/arch/arm/mach-omap1/clock_data.c b/arch/arm/mach-omap1/clock_data.c
index cea91cd..8b1d14d 100644
--- a/arch/arm/mach-omap1/clock_data.c
+++ b/arch/arm/mach-omap1/clock_data.c
@@ -1,7 +1,7 @@
/*
* linux/arch/arm/mach-omap1/clock_data.c
*
- * Copyright (C) 2004 - 2005, 2009 Nokia corporation
+ * Copyright (C) 2004 - 2005, 2009-2010 Nokia Corporation
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
* Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
*
@@ -31,7 +31,6 @@
static struct clk dummy_ck = {
.name = "dummy",
.ops = &clkops_dummy,
- .flags = RATE_FIXED,
};

static struct clk ck_ref = {
@@ -389,8 +388,7 @@ static struct uart_clk uart1_16xx = {
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 48000000,
- .flags = RATE_FIXED | ENABLE_REG_32BIT |
- CLOCK_NO_IDLE_PARENT,
+ .flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = 29,
},
@@ -430,8 +428,7 @@ static struct uart_clk uart3_16xx = {
/* Direct from ULPD, no real parent */
.parent = &armper_ck.clk,
.rate = 48000000,
- .flags = RATE_FIXED | ENABLE_REG_32BIT |
- CLOCK_NO_IDLE_PARENT,
+ .flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = 31,
},
@@ -443,7 +440,7 @@ static struct clk usb_clko = { /* 6 MHz output on W4_USB_CLKO */
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 6000000,
- .flags = RATE_FIXED | ENABLE_REG_32BIT,
+ .flags = ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(ULPD_CLOCK_CTRL),
.enable_bit = USB_MCLK_EN_BIT,
};
@@ -453,7 +450,7 @@ static struct clk usb_hhc_ck1510 = {
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000, /* Actually 2 clocks, 12MHz and 48MHz */
- .flags = RATE_FIXED | ENABLE_REG_32BIT,
+ .flags = ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = USB_HOST_HHC_UHOST_EN,
};
@@ -464,7 +461,7 @@ static struct clk usb_hhc_ck16xx = {
/* Direct from ULPD, no parent */
.rate = 48000000,
/* OTG_SYSCON_2.OTG_PADEN == 0 (not 1510-compatible) */
- .flags = RATE_FIXED | ENABLE_REG_32BIT,
+ .flags = ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(OTG_BASE + 0x08), /* OTG_SYSCON_2 */
.enable_bit = 8 /* UHOST_EN */,
};
@@ -474,7 +471,6 @@ static struct clk usb_dc_ck = {
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000,
- .flags = RATE_FIXED,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = 4,
};
@@ -484,7 +480,6 @@ static struct clk usb_dc_ck7xx = {
.ops = &clkops_generic,
/* Direct from ULPD, no parent */
.rate = 48000000,
- .flags = RATE_FIXED,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = 8,
};
@@ -494,7 +489,6 @@ static struct clk mclk_1510 = {
.ops = &clkops_generic,
/* Direct from ULPD, no parent. May be enabled by ext hardware. */
.rate = 12000000,
- .flags = RATE_FIXED,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = 6,
};
@@ -515,7 +509,6 @@ static struct clk bclk_1510 = {
.ops = &clkops_generic,
/* Direct from ULPD, no parent. May be enabled by ext hardware. */
.rate = 12000000,
- .flags = RATE_FIXED,
};

static struct clk bclk_16xx = {
@@ -535,7 +528,7 @@ static struct clk mmc1_ck = {
/* Functional clock is direct from ULPD, interface clock is ARMPER */
.parent = &armper_ck.clk,
.rate = 48000000,
- .flags = RATE_FIXED | ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
+ .flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = 23,
};
@@ -546,7 +539,7 @@ static struct clk mmc2_ck = {
/* Functional clock is direct from ULPD, interface clock is ARMPER */
.parent = &armper_ck.clk,
.rate = 48000000,
- .flags = RATE_FIXED | ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
+ .flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
.enable_bit = 20,
};
@@ -557,7 +550,7 @@ static struct clk mmc3_ck = {
/* Functional clock is direct from ULPD, interface clock is ARMPER */
.parent = &armper_ck.clk,
.rate = 48000000,
- .flags = RATE_FIXED | ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
+ .flags = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
.enable_reg = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
.enable_bit = 12,
};
diff --git a/arch/arm/mach-omap2/clkt_clksel.c b/arch/arm/mach-omap2/clkt_clksel.c
index ade19f6..e50812d 100644
--- a/arch/arm/mach-omap2/clkt_clksel.c
+++ b/arch/arm/mach-omap2/clkt_clksel.c
@@ -258,10 +258,6 @@ long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
if (clk->round_rate)
return clk->round_rate(clk, rate);

- if (clk->flags & RATE_FIXED)
- printk(KERN_ERR "clock: generic omap2_clk_round_rate called "
- "on fixed-rate clock %s\n", clk->name);
-
return clk->rate;
}

diff --git a/arch/arm/mach-omap2/clock2420_data.c b/arch/arm/mach-omap2/clock2420_data.c
index bef647a..f2122d7 100644
--- a/arch/arm/mach-omap2/clock2420_data.c
+++ b/arch/arm/mach-omap2/clock2420_data.c
@@ -55,7 +55,6 @@ static struct clk func_32k_ck = {
.name = "func_32k_ck",
.ops = &clkops_null,
.rate = 32000,
- .flags = RATE_FIXED,
.clkdm_name = "wkup_clkdm",
};

@@ -63,7 +62,6 @@ static struct clk secure_32k_ck = {
.name = "secure_32k_ck",
.ops = &clkops_null,
.rate = 32768,
- .flags = RATE_FIXED,
.clkdm_name = "wkup_clkdm",
};

@@ -88,7 +86,6 @@ static struct clk alt_ck = { /* Typical 54M or 48M, may not exist */
.name = "alt_ck",
.ops = &clkops_null,
.rate = 54000000,
- .flags = RATE_FIXED,
.clkdm_name = "wkup_clkdm",
};

@@ -134,7 +131,7 @@ static struct clk apll96_ck = {
.ops = &clkops_apll96,
.parent = &sys_ck,
.rate = 96000000,
- .flags = RATE_FIXED | ENABLE_ON_INIT,
+ .flags = ENABLE_ON_INIT,
.clkdm_name = "wkup_clkdm",
.enable_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKEN),
.enable_bit = OMAP24XX_EN_96M_PLL_SHIFT,
@@ -145,7 +142,7 @@ static struct clk apll54_ck = {
.ops = &clkops_apll54,
.parent = &sys_ck,
.rate = 54000000,
- .flags = RATE_FIXED | ENABLE_ON_INIT,
+ .flags = ENABLE_ON_INIT,
.clkdm_name = "wkup_clkdm",
.enable_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKEN),
.enable_bit = OMAP24XX_EN_54M_PLL_SHIFT,
diff --git a/arch/arm/mach-omap2/clock2430_data.c b/arch/arm/mach-omap2/clock2430_data.c
index b389584..0438b6e 100644
--- a/arch/arm/mach-omap2/clock2430_data.c
+++ b/arch/arm/mach-omap2/clock2430_data.c
@@ -55,7 +55,6 @@ static struct clk func_32k_ck = {
.name = "func_32k_ck",
.ops = &clkops_null,
.rate = 32000,
- .flags = RATE_FIXED,
.clkdm_name = "wkup_clkdm",
};

@@ -63,7 +62,6 @@ static struct clk secure_32k_ck = {
.name = "secure_32k_ck",
.ops = &clkops_null,
.rate = 32768,
- .flags = RATE_FIXED,
.clkdm_name = "wkup_clkdm",
};

@@ -88,7 +86,6 @@ static struct clk alt_ck = { /* Typical 54M or 48M, may not exist */
.name = "alt_ck",
.ops = &clkops_null,
.rate = 54000000,
- .flags = RATE_FIXED,
.clkdm_name = "wkup_clkdm",
};

@@ -134,7 +131,7 @@ static struct clk apll96_ck = {
.ops = &clkops_apll96,
.parent = &sys_ck,
.rate = 96000000,
- .flags = RATE_FIXED | ENABLE_ON_INIT,
+ .flags = ENABLE_ON_INIT,
.clkdm_name = "wkup_clkdm",
.enable_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKEN),
.enable_bit = OMAP24XX_EN_96M_PLL_SHIFT,
@@ -145,7 +142,7 @@ static struct clk apll54_ck = {
.ops = &clkops_apll54,
.parent = &sys_ck,
.rate = 54000000,
- .flags = RATE_FIXED | ENABLE_ON_INIT,
+ .flags = ENABLE_ON_INIT,
.clkdm_name = "wkup_clkdm",
.enable_reg = OMAP_CM_REGADDR(PLL_MOD, CM_CLKEN),
.enable_bit = OMAP24XX_EN_54M_PLL_SHIFT,
diff --git a/arch/arm/mach-omap2/clock3xxx_data.c b/arch/arm/mach-omap2/clock3xxx_data.c
index f237902..fd83230 100644
--- a/arch/arm/mach-omap2/clock3xxx_data.c
+++ b/arch/arm/mach-omap2/clock3xxx_data.c
@@ -64,14 +64,12 @@ static struct clk omap_32k_fck = {
.name = "omap_32k_fck",
.ops = &clkops_null,
.rate = 32768,
- .flags = RATE_FIXED,
};

static struct clk secure_32k_fck = {
.name = "secure_32k_fck",
.ops = &clkops_null,
.rate = 32768,
- .flags = RATE_FIXED,
};

/* Virtual source clocks for osc_sys_ck */
@@ -79,42 +77,36 @@ static struct clk virt_12m_ck = {
.name = "virt_12m_ck",
.ops = &clkops_null,
.rate = 12000000,
- .flags = RATE_FIXED,
};

static struct clk virt_13m_ck = {
.name = "virt_13m_ck",
.ops = &clkops_null,
.rate = 13000000,
- .flags = RATE_FIXED,
};

static struct clk virt_16_8m_ck = {
.name = "virt_16_8m_ck",
.ops = &clkops_null,
.rate = 16800000,
- .flags = RATE_FIXED,
};

static struct clk virt_19_2m_ck = {
.name = "virt_19_2m_ck",
.ops = &clkops_null,
.rate = 19200000,
- .flags = RATE_FIXED,
};

static struct clk virt_26m_ck = {
.name = "virt_26m_ck",
.ops = &clkops_null,
.rate = 26000000,
- .flags = RATE_FIXED,
};

static struct clk virt_38_4m_ck = {
.name = "virt_38_4m_ck",
.ops = &clkops_null,
.rate = 38400000,
- .flags = RATE_FIXED,
};

static const struct clksel_rate osc_sys_12m_rates[] = {
@@ -167,7 +159,6 @@ static struct clk osc_sys_ck = {
.clksel_mask = OMAP3430_SYS_CLKIN_SEL_MASK,
.clksel = osc_sys_clksel,
/* REVISIT: deal with autoextclkmode? */
- .flags = RATE_FIXED,
.recalc = &omap2_clksel_recalc,
};

@@ -3168,7 +3159,6 @@ static struct clk emac_ick = {
static struct clk rmii_ck = {
.name = "rmii_ck",
.ops = &clkops_null,
- .flags = RATE_FIXED,
.rate = 50000000,
};

@@ -3224,7 +3214,6 @@ static struct clk vpfe_ick = {
static struct clk pclk_ck = {
.name = "pclk_ck",
.ops = &clkops_null,
- .flags = RATE_FIXED,
.rate = 27000000,
};

diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h
index 9ce9323..dcfdcd6 100644
--- a/arch/arm/plat-omap/include/plat/clock.h
+++ b/arch/arm/plat-omap/include/plat/clock.h
@@ -188,13 +188,12 @@ extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
extern const struct clkops clkops_null;

/* Clock flags */
-#define RATE_FIXED (1 << 0) /* Fixed clock rate */
-#define ENABLE_REG_32BIT (1 << 1) /* Use 32-bit access */
-#define CLOCK_IDLE_CONTROL (1 << 2)
-#define CLOCK_NO_IDLE_PARENT (1 << 3)
-#define ENABLE_ON_INIT (1 << 4) /* Enable upon framework init */
-#define INVERT_ENABLE (1 << 5) /* 0 enables, 1 disables */
-#define ALWAYS_ENABLED (1 << 6)
+#define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */
+#define CLOCK_IDLE_CONTROL (1 << 1)
+#define CLOCK_NO_IDLE_PARENT (1 << 2)
+#define ENABLE_ON_INIT (1 << 3) /* Enable upon framework init */
+#define INVERT_ENABLE (1 << 4) /* 0 enables, 1 disables */
+#define ALWAYS_ENABLED (1 << 5)

/* Clksel_rate flags */
#define DEFAULT_RATE (1 << 0)
--
1.6.6.GIT