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ARM: OMAP2+: hwmod: Add hwmod flag for HWMOD_OPT_CLKS_NEEDED

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Some module needs more than one functional clock in order to be accessible,
like the McASPs found in DRA7xx family.
This flag will indicate that the opt_clks need to be handled at the same
time as the main_clk for the given hwmod, ensuring that all needed clocks
are enabled before we try to access the module's address space.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Peter Ujfalusi 2015-11-12 09:32:58 +02:00 committed by Tony Lindgren
parent bf05c2c2c5
commit c12ba8ce23
2 changed files with 39 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
arch/arm/mach-omap2/omap_hwmod.c
View File

@ -890,6 +890,36 @@ static int _init_opt_clks(struct omap_hwmod *oh)
return ret; return ret;
} }
static void _enable_optional_clocks(struct omap_hwmod *oh)
{
struct omap_hwmod_opt_clk *oc;
int i;
pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh->name);
for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
if (oc->_clk) {
pr_debug("omap_hwmod: enable %s:%s\n", oc->role,
__clk_get_name(oc->_clk));
clk_enable(oc->_clk);
}
}
static void _disable_optional_clocks(struct omap_hwmod *oh)
{
struct omap_hwmod_opt_clk *oc;
int i;
pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh->name);
for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
if (oc->_clk) {
pr_debug("omap_hwmod: disable %s:%s\n", oc->role,
__clk_get_name(oc->_clk));
clk_disable(oc->_clk);
}
}
/** /**
* _enable_clocks - enable hwmod main clock and interface clocks * _enable_clocks - enable hwmod main clock and interface clocks
* @oh: struct omap_hwmod * * @oh: struct omap_hwmod *
@ -917,6 +947,9 @@ static int _enable_clocks(struct omap_hwmod *oh)
clk_enable(os->_clk); clk_enable(os->_clk);
} }
if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
_enable_optional_clocks(oh);
/* The opt clocks are controlled by the device driver. */ /* The opt clocks are controlled by the device driver. */
return 0; return 0;
@ -948,41 +981,14 @@ static int _disable_clocks(struct omap_hwmod *oh)
clk_disable(os->_clk); clk_disable(os->_clk);
} }
if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
_disable_optional_clocks(oh);
/* The opt clocks are controlled by the device driver. */ /* The opt clocks are controlled by the device driver. */
return 0; return 0;
} }
static void _enable_optional_clocks(struct omap_hwmod *oh)
{
struct omap_hwmod_opt_clk *oc;
int i;
pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh->name);
for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
if (oc->_clk) {
pr_debug("omap_hwmod: enable %s:%s\n", oc->role,
__clk_get_name(oc->_clk));
clk_enable(oc->_clk);
}
}
static void _disable_optional_clocks(struct omap_hwmod *oh)
{
struct omap_hwmod_opt_clk *oc;
int i;
pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh->name);
for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
if (oc->_clk) {
pr_debug("omap_hwmod: disable %s:%s\n", oc->role,
__clk_get_name(oc->_clk));
clk_disable(oc->_clk);
}
}
/** /**
* _omap4_enable_module - enable CLKCTRL modulemode on OMAP4 * _omap4_enable_module - enable CLKCTRL modulemode on OMAP4
* @oh: struct omap_hwmod * * @oh: struct omap_hwmod *

3
arch/arm/mach-omap2/omap_hwmod.h
View File

@ -523,6 +523,8 @@ struct omap_hwmod_omap4_prcm {
* HWMOD_RECONFIG_IO_CHAIN: omap_hwmod code needs to reconfigure wake-up * HWMOD_RECONFIG_IO_CHAIN: omap_hwmod code needs to reconfigure wake-up
* events by calling _reconfigure_io_chain() when a device is enabled * events by calling _reconfigure_io_chain() when a device is enabled
* or idled. * or idled.
* HWMOD_OPT_CLKS_NEEDED: The optional clocks are needed for the module to
* operate and they need to be handled at the same time as the main_clk.
*/ */
#define HWMOD_SWSUP_SIDLE (1 << 0) #define HWMOD_SWSUP_SIDLE (1 << 0)
#define HWMOD_SWSUP_MSTANDBY (1 << 1) #define HWMOD_SWSUP_MSTANDBY (1 << 1)
@ -538,6 +540,7 @@ struct omap_hwmod_omap4_prcm {
#define HWMOD_FORCE_MSTANDBY (1 << 11) #define HWMOD_FORCE_MSTANDBY (1 << 11)
#define HWMOD_SWSUP_SIDLE_ACT (1 << 12) #define HWMOD_SWSUP_SIDLE_ACT (1 << 12)
#define HWMOD_RECONFIG_IO_CHAIN (1 << 13) #define HWMOD_RECONFIG_IO_CHAIN (1 << 13)
#define HWMOD_OPT_CLKS_NEEDED (1 << 14)
/* /*
* omap_hwmod._int_flags definitions * omap_hwmod._int_flags definitions