From: Tarun Kanti DebBarma Date: Tue, 20 Sep 2011 11:30:26 +0000 (+0530) Subject: ARM: OMAP: dmtimer: add error handling to export APIs X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ab4eb8b098c7591459b066cec0325a63792e463b;p=linux-beck.git ARM: OMAP: dmtimer: add error handling to export APIs Add error handling code to export APIs. Signed-off-by: Tarun Kanti DebBarma Reviewed-by: Santosh Shilimkar Signed-off-by: Tony Lindgren --- diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c index 43eb75038ba2..de7896fd9b33 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -214,12 +214,16 @@ struct omap_dm_timer *omap_dm_timer_request_specific(int id) } EXPORT_SYMBOL_GPL(omap_dm_timer_request_specific); -void omap_dm_timer_free(struct omap_dm_timer *timer) +int omap_dm_timer_free(struct omap_dm_timer *timer) { + if (unlikely(!timer)) + return -EINVAL; + clk_put(timer->fclk); WARN_ON(!timer->reserved); timer->reserved = 0; + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_free); @@ -237,7 +241,9 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_disable); int omap_dm_timer_get_irq(struct omap_dm_timer *timer) { - return timer->irq; + if (timer) + return timer->irq; + return -EINVAL; } EXPORT_SYMBOL_GPL(omap_dm_timer_get_irq); @@ -281,7 +287,9 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask); struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer) { - return timer->fclk; + if (timer) + return timer->fclk; + return NULL; } EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk); @@ -295,21 +303,25 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask); #endif -void omap_dm_timer_trigger(struct omap_dm_timer *timer) +int omap_dm_timer_trigger(struct omap_dm_timer *timer) { - if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) { - pr_err("%s: timer%d not enabled.\n", __func__, timer->id); - return; + if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) { + pr_err("%s: timer not available or enabled.\n", __func__); + return -EINVAL; } omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0); + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_trigger); -void omap_dm_timer_start(struct omap_dm_timer *timer) +int omap_dm_timer_start(struct omap_dm_timer *timer) { u32 l; + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); if (timer->loses_context) { @@ -327,25 +339,36 @@ void omap_dm_timer_start(struct omap_dm_timer *timer) /* Save the context */ timer->context.tclr = l; + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_start); -void omap_dm_timer_stop(struct omap_dm_timer *timer) +int omap_dm_timer_stop(struct omap_dm_timer *timer) { unsigned long rate = 0; struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; + if (unlikely(!timer)) + return -EINVAL; + if (!pdata->needs_manual_reset) rate = clk_get_rate(timer->fclk); __omap_dm_timer_stop(timer, timer->posted, rate); + + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_stop); int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) { int ret; - struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; + struct dmtimer_platform_data *pdata; + + if (unlikely(!timer)) + return -EINVAL; + + pdata = timer->pdev->dev.platform_data; if (source < 0 || source >= 3) return -EINVAL; @@ -356,11 +379,14 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) } EXPORT_SYMBOL_GPL(omap_dm_timer_set_source); -void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, +int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int load) { u32 l; + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); if (autoreload) @@ -375,15 +401,19 @@ void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, timer->context.tclr = l; timer->context.tldr = load; omap_dm_timer_disable(timer); + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_set_load); /* Optimized set_load which removes costly spin wait in timer_start */ -void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, +int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int load) { u32 l; + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); if (timer->loses_context) { @@ -408,14 +438,18 @@ void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, timer->context.tclr = l; timer->context.tldr = load; timer->context.tcrr = load; + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start); -void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, +int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match) { u32 l; + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); if (enable) @@ -429,14 +463,18 @@ void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, timer->context.tclr = l; timer->context.tmar = match; omap_dm_timer_disable(timer); + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_set_match); -void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, +int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger) { u32 l; + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM | @@ -451,13 +489,17 @@ void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, /* Save the context */ timer->context.tclr = l; omap_dm_timer_disable(timer); + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm); -void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler) +int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler) { u32 l; + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2)); @@ -470,12 +512,16 @@ void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler) /* Save the context */ timer->context.tclr = l; omap_dm_timer_disable(timer); + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler); -void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, +int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value) { + if (unlikely(!timer)) + return -EINVAL; + omap_dm_timer_enable(timer); __omap_dm_timer_int_enable(timer, value); @@ -483,6 +529,7 @@ void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, timer->context.tier = value; timer->context.twer = value; omap_dm_timer_disable(timer); + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable); @@ -490,8 +537,8 @@ unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) { unsigned int l; - if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) { - pr_err("%s: timer%d not enabled.\n", __func__, timer->id); + if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) { + pr_err("%s: timer not available or enabled.\n", __func__); return 0; } @@ -501,18 +548,22 @@ unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) } EXPORT_SYMBOL_GPL(omap_dm_timer_read_status); -void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value) +int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value) { + if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) + return -EINVAL; + __omap_dm_timer_write_status(timer, value); /* Save the context */ timer->context.tisr = value; + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_write_status); unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) { - if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) { - pr_err("%s: timer%d not enabled.\n", __func__, timer->id); + if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) { + pr_err("%s: timer not iavailable or enabled.\n", __func__); return 0; } @@ -520,17 +571,18 @@ unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) } EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter); -void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value) +int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value) { - if (unlikely(pm_runtime_suspended(&timer->pdev->dev))) { - pr_err("%s: timer%d not enabled.\n", __func__, timer->id); - return; + if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) { + pr_err("%s: timer not available or enabled.\n", __func__); + return -EINVAL; } omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value); /* Save the context */ timer->context.tcrr = value; + return 0; } EXPORT_SYMBOL_GPL(omap_dm_timer_write_counter); diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h index 9519d87179e1..d11025e6e7a4 100644 --- a/arch/arm/plat-omap/include/plat/dmtimer.h +++ b/arch/arm/plat-omap/include/plat/dmtimer.h @@ -109,7 +109,7 @@ struct dmtimer_platform_data { struct omap_dm_timer *omap_dm_timer_request(void); struct omap_dm_timer *omap_dm_timer_request_specific(int timer_id); -void omap_dm_timer_free(struct omap_dm_timer *timer); +int omap_dm_timer_free(struct omap_dm_timer *timer); void omap_dm_timer_enable(struct omap_dm_timer *timer); void omap_dm_timer_disable(struct omap_dm_timer *timer); @@ -118,23 +118,23 @@ int omap_dm_timer_get_irq(struct omap_dm_timer *timer); u32 omap_dm_timer_modify_idlect_mask(u32 inputmask); struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer); -void omap_dm_timer_trigger(struct omap_dm_timer *timer); -void omap_dm_timer_start(struct omap_dm_timer *timer); -void omap_dm_timer_stop(struct omap_dm_timer *timer); +int omap_dm_timer_trigger(struct omap_dm_timer *timer); +int omap_dm_timer_start(struct omap_dm_timer *timer); +int omap_dm_timer_stop(struct omap_dm_timer *timer); int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source); -void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value); -void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value); -void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match); -void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger); -void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler); +int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value); +int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value); +int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match); +int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger); +int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler); -void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value); +int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value); unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer); -void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value); +int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value); unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer); -void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value); +int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value); int omap_dm_timers_active(void);