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-rw-r--r--drivers/clocksource/sh_cmt.c31
-rw-r--r--drivers/clocksource/sh_tmu.c31
-rw-r--r--drivers/dma/shdma.c188
-rw-r--r--drivers/dma/shdma.h1
-rw-r--r--drivers/i2c/busses/i2c-sh_mobile.c1
-rw-r--r--drivers/sh/clk/cpg.c2
-rw-r--r--drivers/sh/intc/virq.c5
-rw-r--r--drivers/tty/serial/sh-sci.c16
-rw-r--r--drivers/tty/serial/sh-sci.h16
9 files changed, 210 insertions, 81 deletions
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index f975d24890f..036e5865eb4 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -24,6 +24,7 @@
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/irq.h>
#include <linux/err.h>
#include <linux/clocksource.h>
@@ -152,10 +153,12 @@ static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
{
int ret;
- /* enable clock */
+ /* wake up device and enable clock */
+ pm_runtime_get_sync(&p->pdev->dev);
ret = clk_enable(p->clk);
if (ret) {
dev_err(&p->pdev->dev, "cannot enable clock\n");
+ pm_runtime_put_sync(&p->pdev->dev);
return ret;
}
@@ -187,8 +190,9 @@ static void sh_cmt_disable(struct sh_cmt_priv *p)
/* disable interrupts in CMT block */
sh_cmt_write(p, CMCSR, 0);
- /* stop clock */
+ /* stop clock and mark device as idle */
clk_disable(p->clk);
+ pm_runtime_put_sync(&p->pdev->dev);
}
/* private flags */
@@ -416,11 +420,15 @@ static cycle_t sh_cmt_clocksource_read(struct clocksource *cs)
static int sh_cmt_clocksource_enable(struct clocksource *cs)
{
+ int ret;
struct sh_cmt_priv *p = cs_to_sh_cmt(cs);
p->total_cycles = 0;
- return sh_cmt_start(p, FLAG_CLOCKSOURCE);
+ ret = sh_cmt_start(p, FLAG_CLOCKSOURCE);
+ if (!ret)
+ __clocksource_updatefreq_hz(cs, p->rate);
+ return ret;
}
static void sh_cmt_clocksource_disable(struct clocksource *cs)
@@ -448,19 +456,10 @@ static int sh_cmt_register_clocksource(struct sh_cmt_priv *p,
cs->mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
- /* clk_get_rate() needs an enabled clock */
- clk_enable(p->clk);
- p->rate = clk_get_rate(p->clk) / ((p->width == 16) ? 512 : 8);
- clk_disable(p->clk);
-
- /* TODO: calculate good shift from rate and counter bit width */
- cs->shift = 0;
- cs->mult = clocksource_hz2mult(p->rate, cs->shift);
-
dev_info(&p->pdev->dev, "used as clock source\n");
- clocksource_register(cs);
-
+ /* Register with dummy 1 Hz value, gets updated in ->enable() */
+ clocksource_register_hz(cs, 1);
return 0;
}
@@ -665,6 +664,7 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev)
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");
+ pm_runtime_enable(&pdev->dev);
return 0;
}
@@ -679,6 +679,9 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev)
kfree(p);
platform_set_drvdata(pdev, NULL);
}
+
+ if (!is_early_platform_device(pdev))
+ pm_runtime_enable(&pdev->dev);
return ret;
}
diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 36aba992306..17296288a20 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -25,6 +25,7 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/irq.h>
#include <linux/err.h>
#include <linux/clocksource.h>
@@ -109,10 +110,12 @@ static int sh_tmu_enable(struct sh_tmu_priv *p)
{
int ret;
- /* enable clock */
+ /* wake up device and enable clock */
+ pm_runtime_get_sync(&p->pdev->dev);
ret = clk_enable(p->clk);
if (ret) {
dev_err(&p->pdev->dev, "cannot enable clock\n");
+ pm_runtime_put_sync(&p->pdev->dev);
return ret;
}
@@ -141,8 +144,9 @@ static void sh_tmu_disable(struct sh_tmu_priv *p)
/* disable interrupts in TMU block */
sh_tmu_write(p, TCR, 0x0000);
- /* stop clock */
+ /* stop clock and mark device as idle */
clk_disable(p->clk);
+ pm_runtime_put_sync(&p->pdev->dev);
}
static void sh_tmu_set_next(struct sh_tmu_priv *p, unsigned long delta,
@@ -199,8 +203,12 @@ static cycle_t sh_tmu_clocksource_read(struct clocksource *cs)
static int sh_tmu_clocksource_enable(struct clocksource *cs)
{
struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
+ int ret;
- return sh_tmu_enable(p);
+ ret = sh_tmu_enable(p);
+ if (!ret)
+ __clocksource_updatefreq_hz(cs, p->rate);
+ return ret;
}
static void sh_tmu_clocksource_disable(struct clocksource *cs)
@@ -221,17 +229,10 @@ static int sh_tmu_register_clocksource(struct sh_tmu_priv *p,
cs->mask = CLOCKSOURCE_MASK(32);
cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
- /* clk_get_rate() needs an enabled clock */
- clk_enable(p->clk);
- /* channel will be configured at parent clock / 4 */
- p->rate = clk_get_rate(p->clk) / 4;
- clk_disable(p->clk);
- /* TODO: calculate good shift from rate and counter bit width */
- cs->shift = 10;
- cs->mult = clocksource_hz2mult(p->rate, cs->shift);
-
dev_info(&p->pdev->dev, "used as clock source\n");
- clocksource_register(cs);
+
+ /* Register with dummy 1 Hz value, gets updated in ->enable() */
+ clocksource_register_hz(cs, 1);
return 0;
}
@@ -414,6 +415,7 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev)
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");
+ pm_runtime_enable(&pdev->dev);
return 0;
}
@@ -428,6 +430,9 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev)
kfree(p);
platform_set_drvdata(pdev, NULL);
}
+
+ if (!is_early_platform_device(pdev))
+ pm_runtime_enable(&pdev->dev);
return ret;
}
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index d50da41ac32..dcc1b2139ff 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -48,7 +48,7 @@ enum sh_dmae_desc_status {
/*
* Used for write-side mutual exclusion for the global device list,
- * read-side synchronization by way of RCU.
+ * read-side synchronization by way of RCU, and per-controller data.
*/
static DEFINE_SPINLOCK(sh_dmae_lock);
static LIST_HEAD(sh_dmae_devices);
@@ -85,22 +85,35 @@ static void dmaor_write(struct sh_dmae_device *shdev, u16 data)
*/
static void sh_dmae_ctl_stop(struct sh_dmae_device *shdev)
{
- unsigned short dmaor = dmaor_read(shdev);
+ unsigned short dmaor;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sh_dmae_lock, flags);
+ dmaor = dmaor_read(shdev);
dmaor_write(shdev, dmaor & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME));
+
+ spin_unlock_irqrestore(&sh_dmae_lock, flags);
}
static int sh_dmae_rst(struct sh_dmae_device *shdev)
{
unsigned short dmaor;
+ unsigned long flags;
- sh_dmae_ctl_stop(shdev);
- dmaor = dmaor_read(shdev) | shdev->pdata->dmaor_init;
+ spin_lock_irqsave(&sh_dmae_lock, flags);
- dmaor_write(shdev, dmaor);
- if (dmaor_read(shdev) & (DMAOR_AE | DMAOR_NMIF)) {
- pr_warning("dma-sh: Can't initialize DMAOR.\n");
- return -EINVAL;
+ dmaor = dmaor_read(shdev) & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME);
+
+ dmaor_write(shdev, dmaor | shdev->pdata->dmaor_init);
+
+ dmaor = dmaor_read(shdev);
+
+ spin_unlock_irqrestore(&sh_dmae_lock, flags);
+
+ if (dmaor & (DMAOR_AE | DMAOR_NMIF)) {
+ dev_warn(shdev->common.dev, "Can't initialize DMAOR.\n");
+ return -EIO;
}
return 0;
}
@@ -184,7 +197,7 @@ static void dmae_init(struct sh_dmae_chan *sh_chan)
static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
{
- /* When DMA was working, can not set data to CHCR */
+ /* If DMA is active, cannot set CHCR. TODO: remove this superfluous check */
if (dmae_is_busy(sh_chan))
return -EBUSY;
@@ -374,7 +387,12 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
LIST_HEAD(list);
int descs = sh_chan->descs_allocated;
+ /* Protect against ISR */
+ spin_lock_irq(&sh_chan->desc_lock);
dmae_halt(sh_chan);
+ spin_unlock_irq(&sh_chan->desc_lock);
+
+ /* Now no new interrupts will occur */
/* Prepared and not submitted descriptors can still be on the queue */
if (!list_empty(&sh_chan->ld_queue))
@@ -384,6 +402,7 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
/* The caller is holding dma_list_mutex */
struct sh_dmae_slave *param = chan->private;
clear_bit(param->slave_id, sh_dmae_slave_used);
+ chan->private = NULL;
}
spin_lock_bh(&sh_chan->desc_lock);
@@ -563,8 +582,6 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
if (!chan || !len)
return NULL;
- chan->private = NULL;
-
sh_chan = to_sh_chan(chan);
sg_init_table(&sg, 1);
@@ -620,9 +637,9 @@ static int sh_dmae_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
if (!chan)
return -EINVAL;
+ spin_lock_bh(&sh_chan->desc_lock);
dmae_halt(sh_chan);
- spin_lock_bh(&sh_chan->desc_lock);
if (!list_empty(&sh_chan->ld_queue)) {
/* Record partial transfer */
struct sh_desc *desc = list_entry(sh_chan->ld_queue.next,
@@ -716,6 +733,14 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
list_move(&desc->node, &sh_chan->ld_free);
}
}
+
+ if (all && !callback)
+ /*
+ * Terminating and the loop completed normally: forgive
+ * uncompleted cookies
+ */
+ sh_chan->completed_cookie = sh_chan->common.cookie;
+
spin_unlock_bh(&sh_chan->desc_lock);
if (callback)
@@ -733,10 +758,6 @@ static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all)
{
while (__ld_cleanup(sh_chan, all))
;
-
- if (all)
- /* Terminating - forgive uncompleted cookies */
- sh_chan->completed_cookie = sh_chan->common.cookie;
}
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
@@ -782,8 +803,10 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
sh_dmae_chan_ld_cleanup(sh_chan, false);
- last_used = chan->cookie;
+ /* First read completed cookie to avoid a skew */
last_complete = sh_chan->completed_cookie;
+ rmb();
+ last_used = chan->cookie;
BUG_ON(last_complete < 0);
dma_set_tx_state(txstate, last_complete, last_used, 0);
@@ -813,8 +836,12 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
static irqreturn_t sh_dmae_interrupt(int irq, void *data)
{
irqreturn_t ret = IRQ_NONE;
- struct sh_dmae_chan *sh_chan = (struct sh_dmae_chan *)data;
- u32 chcr = sh_dmae_readl(sh_chan, CHCR);
+ struct sh_dmae_chan *sh_chan = data;
+ u32 chcr;
+
+ spin_lock(&sh_chan->desc_lock);
+
+ chcr = sh_dmae_readl(sh_chan, CHCR);
if (chcr & CHCR_TE) {
/* DMA stop */
@@ -824,10 +851,13 @@ static irqreturn_t sh_dmae_interrupt(int irq, void *data)
tasklet_schedule(&sh_chan->tasklet);
}
+ spin_unlock(&sh_chan->desc_lock);
+
return ret;
}
-static unsigned int sh_dmae_reset(struct sh_dmae_device *shdev)
+/* Called from error IRQ or NMI */
+static bool sh_dmae_reset(struct sh_dmae_device *shdev)
{
unsigned int handled = 0;
int i;
@@ -839,22 +869,32 @@ static unsigned int sh_dmae_reset(struct sh_dmae_device *shdev)
for (i = 0; i < SH_DMAC_MAX_CHANNELS; i++) {
struct sh_dmae_chan *sh_chan = shdev->chan[i];
struct sh_desc *desc;
+ LIST_HEAD(dl);
if (!sh_chan)
continue;
+ spin_lock(&sh_chan->desc_lock);
+
/* Stop the channel */
dmae_halt(sh_chan);
+ list_splice_init(&sh_chan->ld_queue, &dl);
+
+ spin_unlock(&sh_chan->desc_lock);
+
/* Complete all */
- list_for_each_entry(desc, &sh_chan->ld_queue, node) {
+ list_for_each_entry(desc, &dl, node) {
struct dma_async_tx_descriptor *tx = &desc->async_tx;
desc->mark = DESC_IDLE;
if (tx->callback)
tx->callback(tx->callback_param);
}
- list_splice_init(&sh_chan->ld_queue, &sh_chan->ld_free);
+ spin_lock(&sh_chan->desc_lock);
+ list_splice(&dl, &sh_chan->ld_free);
+ spin_unlock(&sh_chan->desc_lock);
+
handled++;
}
@@ -867,10 +907,11 @@ static irqreturn_t sh_dmae_err(int irq, void *data)
{
struct sh_dmae_device *shdev = data;
- if (dmaor_read(shdev) & DMAOR_AE)
- return IRQ_RETVAL(sh_dmae_reset(data));
- else
+ if (!(dmaor_read(shdev) & DMAOR_AE))
return IRQ_NONE;
+
+ sh_dmae_reset(data);
+ return IRQ_HANDLED;
}
static void dmae_do_tasklet(unsigned long data)
@@ -902,17 +943,11 @@ static void dmae_do_tasklet(unsigned long data)
static bool sh_dmae_nmi_notify(struct sh_dmae_device *shdev)
{
- unsigned int handled;
-
/* Fast path out if NMIF is not asserted for this controller */
if ((dmaor_read(shdev) & DMAOR_NMIF) == 0)
return false;
- handled = sh_dmae_reset(shdev);
- if (handled)
- return true;
-
- return false;
+ return sh_dmae_reset(shdev);
}
static int sh_dmae_nmi_handler(struct notifier_block *self,
@@ -982,9 +1017,6 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
tasklet_init(&new_sh_chan->tasklet, dmae_do_tasklet,
(unsigned long)new_sh_chan);
- /* Init the channel */
- dmae_init(new_sh_chan);
-
spin_lock_init(&new_sh_chan->desc_lock);
/* Init descripter manage list */
@@ -1045,7 +1077,6 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
unsigned long irqflags = IRQF_DISABLED,
chan_flag[SH_DMAC_MAX_CHANNELS] = {};
- unsigned long flags;
int errirq, chan_irq[SH_DMAC_MAX_CHANNELS];
int err, i, irq_cnt = 0, irqres = 0;
struct sh_dmae_device *shdev;
@@ -1111,11 +1142,11 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
- spin_lock_irqsave(&sh_dmae_lock, flags);
+ spin_lock_irq(&sh_dmae_lock);
list_add_tail_rcu(&shdev->node, &sh_dmae_devices);
- spin_unlock_irqrestore(&sh_dmae_lock, flags);
+ spin_unlock_irq(&sh_dmae_lock);
- /* reset dma controller */
+ /* reset dma controller - only needed as a test */
err = sh_dmae_rst(shdev);
if (err)
goto rst_err;
@@ -1218,15 +1249,18 @@ eirqres:
eirq_err:
#endif
rst_err:
- spin_lock_irqsave(&sh_dmae_lock, flags);
+ spin_lock_irq(&sh_dmae_lock);
list_del_rcu(&shdev->node);
- spin_unlock_irqrestore(&sh_dmae_lock, flags);
+ spin_unlock_irq(&sh_dmae_lock);
pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
if (dmars)
iounmap(shdev->dmars);
emapdmars:
iounmap(shdev->chan_reg);
+ synchronize_rcu();
emapchan:
kfree(shdev);
ealloc:
@@ -1242,7 +1276,6 @@ static int __exit sh_dmae_remove(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
struct resource *res;
- unsigned long flags;
int errirq = platform_get_irq(pdev, 0);
dma_async_device_unregister(&shdev->common);
@@ -1250,9 +1283,9 @@ static int __exit sh_dmae_remove(struct platform_device *pdev)
if (errirq > 0)
free_irq(errirq, shdev);
- spin_lock_irqsave(&sh_dmae_lock, flags);
+ spin_lock_irq(&sh_dmae_lock);
list_del_rcu(&shdev->node);
- spin_unlock_irqrestore(&sh_dmae_lock, flags);
+ spin_unlock_irq(&sh_dmae_lock);
/* channel data remove */
sh_dmae_chan_remove(shdev);
@@ -1263,6 +1296,7 @@ static int __exit sh_dmae_remove(struct platform_device *pdev)
iounmap(shdev->dmars);
iounmap(shdev->chan_reg);
+ synchronize_rcu();
kfree(shdev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1281,12 +1315,78 @@ static void sh_dmae_shutdown(struct platform_device *pdev)
sh_dmae_ctl_stop(shdev);
}
+static int sh_dmae_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int sh_dmae_runtime_resume(struct device *dev)
+{
+ struct sh_dmae_device *shdev = dev_get_drvdata(dev);
+
+ return sh_dmae_rst(shdev);
+}
+
+#ifdef CONFIG_PM
+static int sh_dmae_suspend(struct device *dev)
+{
+ struct sh_dmae_device *shdev = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < shdev->pdata->channel_num; i++) {
+ struct sh_dmae_chan *sh_chan = shdev->chan[i];
+ if (sh_chan->descs_allocated)
+ sh_chan->pm_error = pm_runtime_put_sync(dev);
+ }
+
+ return 0;
+}
+
+static int sh_dmae_resume(struct device *dev)
+{
+ struct sh_dmae_device *shdev = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < shdev->pdata->channel_num; i++) {
+ struct sh_dmae_chan *sh_chan = shdev->chan[i];
+ struct sh_dmae_slave *param = sh_chan->common.private;
+
+ if (!sh_chan->descs_allocated)
+ continue;
+
+ if (!sh_chan->pm_error)
+ pm_runtime_get_sync(dev);
+
+ if (param) {
+ const struct sh_dmae_slave_config *cfg = param->config;
+ dmae_set_dmars(sh_chan, cfg->mid_rid);
+ dmae_set_chcr(sh_chan, cfg->chcr);
+ } else {
+ dmae_init(sh_chan);
+ }
+ }
+
+ return 0;
+}
+#else
+#define sh_dmae_suspend NULL
+#define sh_dmae_resume NULL
+#endif
+
+const struct dev_pm_ops sh_dmae_pm = {
+ .suspend = sh_dmae_suspend,
+ .resume = sh_dmae_resume,
+ .runtime_suspend = sh_dmae_runtime_suspend,
+ .runtime_resume = sh_dmae_runtime_resume,
+};
+
static struct platform_driver sh_dmae_driver = {
.remove = __exit_p(sh_dmae_remove),
.shutdown = sh_dmae_shutdown,
.driver = {
.owner = THIS_MODULE,
.name = "sh-dma-engine",
+ .pm = &sh_dmae_pm,
},
};
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 52e4fb17380..3f9d3cd0658 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -37,6 +37,7 @@ struct sh_dmae_chan {
int id; /* Raw id of this channel */
u32 __iomem *base;
char dev_id[16]; /* unique name per DMAC of channel */
+ int pm_error;
};
struct sh_dmae_device {
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 2707f5e1715..81ccd787562 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -729,3 +729,4 @@ module_exit(sh_mobile_i2c_adap_exit);
MODULE_DESCRIPTION("SuperH Mobile I2C Bus Controller driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:i2c-sh_mobile");
diff --git a/drivers/sh/clk/cpg.c b/drivers/sh/clk/cpg.c
index 6172335ae32..82dd6fb1783 100644
--- a/drivers/sh/clk/cpg.c
+++ b/drivers/sh/clk/cpg.c
@@ -105,7 +105,7 @@ static int sh_clk_div6_set_parent(struct clk *clk, struct clk *parent)
/* Rebuild the frequency table */
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
- table, &clk->arch_flags);
+ table, NULL);
return 0;
}
diff --git a/drivers/sh/intc/virq.c b/drivers/sh/intc/virq.c
index ce5f81d7cc6..1e6e2d0353e 100644
--- a/drivers/sh/intc/virq.c
+++ b/drivers/sh/intc/virq.c
@@ -235,6 +235,11 @@ restart:
irq_set_handler_data(irq, (void *)entry->handle);
+ /*
+ * Set the virtual IRQ as non-threadable.
+ */
+ irq_set_nothread(irq);
+
irq_set_chained_handler(entry->pirq, intc_virq_handler);
add_virq_to_pirq(entry->pirq, irq);
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index f35b8fb94b8..ebd8629c108 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -41,6 +41,7 @@
#include <linux/platform_device.h>
#include <linux/serial_sci.h>
#include <linux/notifier.h>
+#include <linux/pm_runtime.h>
#include <linux/cpufreq.h>
#include <linux/clk.h>
#include <linux/ctype.h>
@@ -560,6 +561,9 @@ static void sci_break_timer(unsigned long data)
{
struct sci_port *port = (struct sci_port *)data;
+ if (port->enable)
+ port->enable(&port->port);
+
if (sci_rxd_in(&port->port) == 0) {
port->break_flag = 1;
sci_schedule_break_timer(port);
@@ -569,6 +573,9 @@ static void sci_break_timer(unsigned long data)
sci_schedule_break_timer(port);
} else
port->break_flag = 0;
+
+ if (port->disable)
+ port->disable(&port->port);
}
static int sci_handle_errors(struct uart_port *port)
@@ -837,6 +844,8 @@ static void sci_clk_enable(struct uart_port *port)
{
struct sci_port *sci_port = to_sci_port(port);
+ pm_runtime_get_sync(port->dev);
+
clk_enable(sci_port->iclk);
sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
clk_enable(sci_port->fclk);
@@ -848,6 +857,8 @@ static void sci_clk_disable(struct uart_port *port)
clk_disable(sci_port->fclk);
clk_disable(sci_port->iclk);
+
+ pm_runtime_put_sync(port->dev);
}
static int sci_request_irq(struct sci_port *port)
@@ -1756,6 +1767,8 @@ static int __devinit sci_init_single(struct platform_device *dev,
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
port->dev = &dev->dev;
+
+ pm_runtime_enable(&dev->dev);
}
sci_port->break_timer.data = (unsigned long)sci_port;
@@ -1775,7 +1788,7 @@ static int __devinit sci_init_single(struct platform_device *dev,
*
* For the muxed case there's nothing more to do.
*/
- port->irq = p->irqs[SCIx_TXI_IRQ];
+ port->irq = p->irqs[SCIx_RXI_IRQ];
if (p->dma_dev)
dev_dbg(port->dev, "DMA device %p, tx %d, rx %d\n",
@@ -1936,6 +1949,7 @@ static int sci_remove(struct platform_device *dev)
clk_put(port->iclk);
clk_put(port->fclk);
+ pm_runtime_disable(&dev->dev);
return 0;
}
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index 5fefed53fa4..b04d937c911 100644
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -270,12 +270,12 @@
#elif defined(CONFIG_CPU_SUBTYPE_SH7705) || \
defined(CONFIG_CPU_SUBTYPE_SH7720) || \
defined(CONFIG_CPU_SUBTYPE_SH7721) || \
- defined(CONFIG_ARCH_SH73A0) || \
- defined(CONFIG_ARCH_SH7367) || \
- defined(CONFIG_ARCH_SH7377)
+ defined(CONFIG_ARCH_SH7367)
#define SCIF_FNS(name, scif_offset, scif_size) \
CPU_SCIF_FNS(name, scif_offset, scif_size)
-#elif defined(CONFIG_ARCH_SH7372)
+#elif defined(CONFIG_ARCH_SH7377) || \
+ defined(CONFIG_ARCH_SH7372) || \
+ defined(CONFIG_ARCH_SH73A0)
#define SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scifb_offset, sh4_scifb_size) \
CPU_SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scifb_offset, sh4_scifb_size)
#define SCIF_FNS(name, scif_offset, scif_size) \
@@ -313,9 +313,7 @@
#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
defined(CONFIG_CPU_SUBTYPE_SH7720) || \
defined(CONFIG_CPU_SUBTYPE_SH7721) || \
- defined(CONFIG_ARCH_SH73A0) || \
- defined(CONFIG_ARCH_SH7367) || \
- defined(CONFIG_ARCH_SH7377)
+ defined(CONFIG_ARCH_SH7367)
SCIF_FNS(SCSMR, 0x00, 16)
SCIF_FNS(SCBRR, 0x04, 8)
@@ -326,7 +324,9 @@ SCIF_FNS(SCFDR, 0x1c, 16)
SCIF_FNS(SCxTDR, 0x20, 8)
SCIF_FNS(SCxRDR, 0x24, 8)
SCIF_FNS(SCLSR, 0x00, 0)
-#elif defined(CONFIG_ARCH_SH7372)
+#elif defined(CONFIG_ARCH_SH7377) || \
+ defined(CONFIG_ARCH_SH7372) || \
+ defined(CONFIG_ARCH_SH73A0)
SCIF_FNS(SCSMR, 0x00, 16)
SCIF_FNS(SCBRR, 0x04, 8)
SCIF_FNS(SCSCR, 0x08, 16)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 00:34:02 +0000