Commit c12ba8ce authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Tony Lindgren

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

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: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: default avatarPaul Walmsley <paul@pwsan.com>
Tested-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent bf05c2c2
......@@ -890,6 +890,36 @@ static int _init_opt_clks(struct omap_hwmod *oh)
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
* @oh: struct omap_hwmod *
......@@ -917,6 +947,9 @@ static int _enable_clocks(struct omap_hwmod *oh)
clk_enable(os->_clk);
}
if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
_enable_optional_clocks(oh);
/* The opt clocks are controlled by the device driver. */
return 0;
......@@ -948,41 +981,14 @@ static int _disable_clocks(struct omap_hwmod *oh)
clk_disable(os->_clk);
}
if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
_disable_optional_clocks(oh);
/* The opt clocks are controlled by the device driver. */
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
* @oh: struct omap_hwmod *
......
......@@ -523,6 +523,8 @@ struct omap_hwmod_omap4_prcm {
* HWMOD_RECONFIG_IO_CHAIN: omap_hwmod code needs to reconfigure wake-up
* events by calling _reconfigure_io_chain() when a device is enabled
* 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_MSTANDBY (1 << 1)
......@@ -538,6 +540,7 @@ struct omap_hwmod_omap4_prcm {
#define HWMOD_FORCE_MSTANDBY (1 << 11)
#define HWMOD_SWSUP_SIDLE_ACT (1 << 12)
#define HWMOD_RECONFIG_IO_CHAIN (1 << 13)
#define HWMOD_OPT_CLKS_NEEDED (1 << 14)
/*
* omap_hwmod._int_flags definitions
......
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