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OMAP clock: drop RATE_FIXED clock flag 

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.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Richard Woodruff <r-woodruff2@ti.com>
hifive-unleashed-5.1
Paul Walmsley 2010-02-22 22:09:26 -07:00
parent 8c34974ab0
commit 51c1954162
7 changed files with 20 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-omap1/clock.c
View File

@ -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);

25
arch/arm/mach-omap1/clock_data.c
View File

@ -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,
};

4
arch/arm/mach-omap2/clkt_clksel.c
View File

@ -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;
}

7
arch/arm/mach-omap2/clock2420_data.c
View File

@ -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,

7
arch/arm/mach-omap2/clock2430_data.c
View File

@ -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,

11
arch/arm/mach-omap2/clock3xxx_data.c
View File

@ -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,
};

13
arch/arm/plat-omap/include/plat/clock.h
View File

@ -186,13 +186,12 @@ 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)