diff options
| -rw-r--r-- | arch/arm/mach-omap2/mux.c | 48 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/mux.h | 15 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 14 |
3 files changed, 74 insertions, 3 deletions
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c index 27eb51a224c..17bd6394d22 100644 --- a/arch/arm/mach-omap2/mux.c +++ b/arch/arm/mach-omap2/mux.c @@ -317,6 +317,54 @@ err1: return NULL; } +/* Assumes the calling function takes care of locking */ +void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state) +{ + int i; + + for (i = 0; i < hmux->nr_pads; i++) { + struct omap_device_pad *pad = &hmux->pads[i]; + int flags, val = -EINVAL; + + flags = pad->flags; + + switch (state) { + case _HWMOD_STATE_ENABLED: + if (flags & OMAP_DEVICE_PAD_ENABLED) + break; + flags |= OMAP_DEVICE_PAD_ENABLED; + val = pad->enable; + pr_debug("%s: Enabling %s %x\n", __func__, + pad->name, val); + break; + case _HWMOD_STATE_IDLE: + if (!(flags & OMAP_DEVICE_PAD_REMUX)) + break; + flags &= ~OMAP_DEVICE_PAD_ENABLED; + val = pad->idle; + pr_debug("%s: Idling %s %x\n", __func__, + pad->name, val); + break; + case _HWMOD_STATE_DISABLED: + default: + /* Use safe mode unless OMAP_DEVICE_PAD_REMUX */ + if (flags & OMAP_DEVICE_PAD_REMUX) + val = pad->off; + else + val = OMAP_MUX_MODE7; + flags &= ~OMAP_DEVICE_PAD_ENABLED; + pr_debug("%s: Disabling %s %x\n", __func__, + pad->name, val); + }; + + if (val >= 0) { + omap_mux_write(pad->partition, val, + pad->mux->reg_offset); + pad->flags = flags; + } + } +} + #ifdef CONFIG_DEBUG_FS #define OMAP_MUX_MAX_NR_FLAGS 10 diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h index 9c48b9d3ec2..c9ec50de99c 100644 --- a/arch/arm/mach-omap2/mux.h +++ b/arch/arm/mach-omap2/mux.h @@ -171,6 +171,8 @@ struct omap_device_pad { struct omap_mux *mux; }; +struct omap_hwmod_mux_info; + #if defined(CONFIG_OMAP_MUX) /** @@ -195,6 +197,15 @@ int omap_mux_init_signal(const char *muxname, int val); extern struct omap_hwmod_mux_info * omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads); +/** + * omap_hwmod_mux - omap hwmod specific pin muxing + * @hmux: Pads for a hwmod + * @state: Desired _HWMOD_STATE + * + * Called only from omap_hwmod.c, do not use. + */ +void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state); + #else static inline int omap_mux_init_gpio(int gpio, int val) @@ -212,6 +223,10 @@ omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads) return NULL; } +static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state) +{ +} + static struct omap_board_mux *board_mux __initdata __maybe_unused; #endif diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 77a8be64cfa..e282e35769f 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -116,7 +116,6 @@ * - Open Core Protocol Specification 2.2 * * To do: - * - pin mux handling * - handle IO mapping * - bus throughput & module latency measurement code * @@ -149,6 +148,7 @@ #include "cm44xx.h" #include "prm2xxx_3xxx.h" #include "prm44xx.h" +#include "mux.h" /* Maximum microseconds to wait for OMAP module to softreset */ #define MAX_MODULE_SOFTRESET_WAIT 10000 @@ -1229,7 +1229,9 @@ static int _enable(struct omap_hwmod *oh) oh->_state == _HWMOD_STATE_DISABLED) && oh->rst_lines_cnt == 1) _deassert_hardreset(oh, oh->rst_lines[0].name); - /* XXX mux balls */ + /* Mux pins for device runtime if populated */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); _add_initiator_dep(oh, mpu_oh); _enable_clocks(oh); @@ -1276,6 +1278,10 @@ static int _idle(struct omap_hwmod *oh) _del_initiator_dep(oh, mpu_oh); _disable_clocks(oh); + /* Mux pins for device idle if populated */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); + oh->_state = _HWMOD_STATE_IDLE; return 0; @@ -1334,7 +1340,9 @@ static int _shutdown(struct omap_hwmod *oh) } /* XXX Should this code also force-disable the optional clocks? */ - /* XXX mux any associated balls to safe mode */ + /* Mux pins to safe mode or use populated off mode values */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED); oh->_state = _HWMOD_STATE_DISABLED; |