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[PATCH v2 5/5] spi: omap2-mcspi: add support for pm_runtime autosuspend
Adds support for configuring the omap2-mcspi driver use autosuspend for
runtime power management. This can reduce the latency in starting an
spi transfer by not suspending the device immediately following
completion of a transfer. If another transfer then takes place before
the autosuspend timeout (2 secs), the call to resume the device can
return immediately saving some save/ restore cycles.
Acked-by: Govindraj.R govindraj.r...@ti.com
Signed-off-by: Shubhrajyoti D shubhrajy...@ti.com
---
drivers/spi/spi-omap2-mcspi.c |6 +-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 1907ed2..0b0da2f 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -44,6 +44,7 @@
#include plat/mcspi.h
#define OMAP2_MCSPI_MAX_FREQ 4800
+#define SPI_AUTOSUSPEND_TIMEOUT2000
#define OMAP2_MCSPI_REVISION 0x00
#define OMAP2_MCSPI_SYSSTATUS 0x14
@@ -265,7 +266,8 @@ static void omap2_mcspi_restore_ctx(struct omap2_mcspi
*mcspi)
}
static void omap2_mcspi_disable_clocks(struct omap2_mcspi *mcspi)
{
- pm_runtime_put_sync(mcspi-dev);
+ pm_runtime_mark_last_busy(mcspi-dev);
+ pm_runtime_put_autosuspend(mcspi-dev);
}
static int omap2_mcspi_enable_clocks(struct omap2_mcspi *mcspi)
@@ -1212,6 +1214,8 @@ static int __devinit omap2_mcspi_probe(struct
platform_device *pdev)
if (status 0)
goto dma_chnl_free;
+ pm_runtime_use_autosuspend(pdev-dev);
+ pm_runtime_set_autosuspend_delay(pdev-dev, SPI_AUTOSUSPEND_TIMEOUT);
pm_runtime_enable(pdev-dev);
if (status || omap2_mcspi_master_setup(mcspi) 0)
--
1.7.1
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[PATCH v2 4/5] spi: omap2-mcspi: use devm_* functions
The various devm_* functions allocate memory that is released when a driver
detaches. This patch uses devm_request_and_ioremap
to request memory in probe function. Since the freeing is not
needed the calls are deleted from remove function.Also use
use devm_kzalloc for the cs memory allocation.
Signed-off-by: Shubhrajyoti D shubhrajy...@ti.com
---
drivers/spi/spi-omap2-mcspi.c | 24
1 files changed, 4 insertions(+), 20 deletions(-)
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 66cbf22..1907ed2 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -787,7 +787,7 @@ static int omap2_mcspi_setup(struct spi_device *spi)
mcspi_dma = mcspi-dma_channels[spi-chip_select];
if (!cs) {
- cs = kzalloc(sizeof *cs, GFP_KERNEL);
+ cs = devm_kzalloc(spi-dev , sizeof *cs, GFP_KERNEL);
if (!cs)
return -ENOMEM;
cs-base = mcspi-base + spi-chip_select * 0x14;
@@ -828,7 +828,6 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
cs = spi-controller_state;
list_del(cs-node);
- kfree(spi-controller_state);
}
if (spi-chip_select spi-master-num_chipselect) {
@@ -1160,17 +1159,12 @@ static int __devinit omap2_mcspi_probe(struct
platform_device *pdev)
r-start += regs_offset;
r-end += regs_offset;
mcspi-phys = r-start;
- if (!request_mem_region(r-start, resource_size(r),
- dev_name(pdev-dev))) {
- status = -EBUSY;
- goto free_master;
- }
- mcspi-base = ioremap(r-start, resource_size(r));
+ mcspi-base = devm_request_and_ioremap(pdev-dev, r);
if (!mcspi-base) {
dev_dbg(pdev-dev, can't ioremap MCSPI\n);
status = -ENOMEM;
- goto release_region;
+ goto free_master;
}
mcspi-dev = pdev-dev;
@@ -1185,7 +1179,7 @@ static int __devinit omap2_mcspi_probe(struct
platform_device *pdev)
GFP_KERNEL);
if (mcspi-dma_channels == NULL)
- goto unmap_io;
+ goto free_master;
for (i = 0; i master-num_chipselect; i++) {
char dma_ch_name[14];
@@ -1235,10 +1229,6 @@ disable_pm:
pm_runtime_disable(pdev-dev);
dma_chnl_free:
kfree(mcspi-dma_channels);
-unmap_io:
- iounmap(mcspi-base);
-release_region:
- release_mem_region(r-start, resource_size(r));
free_master:
kfree(master);
platform_set_drvdata(pdev, NULL);
@@ -1250,8 +1240,6 @@ static int __devexit omap2_mcspi_remove(struct
platform_device *pdev)
struct spi_master *master;
struct omap2_mcspi *mcspi;
struct omap2_mcspi_dma *dma_channels;
- struct resource *r;
- void __iomem *base;
master = dev_get_drvdata(pdev-dev);
mcspi = spi_master_get_devdata(master);
@@ -1259,12 +1247,8 @@ static int __devexit omap2_mcspi_remove(struct
platform_device *pdev)
omap2_mcspi_disable_clocks(mcspi);
pm_runtime_disable(pdev-dev);
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(r-start, resource_size(r));
- base = mcspi-base;
spi_unregister_master(master);
- iounmap(base);
kfree(dma_channels);
destroy_workqueue(mcspi-wq);
platform_set_drvdata(pdev, NULL);
--
1.7.1
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[PATCH v2 2/5] spi: omap2-mcspi: make it behave as a module
From: Felipe Balbi ba...@ti.com
move probe away from __init section and use
platform_driver_register() instead of
platform_driver_probe().
Signed-off-by: Felipe Balbi ba...@ti.com
Signed-off-by: Shubhrajyoti D shubhrajy...@ti.com
---
drivers/spi/spi-omap2-mcspi.c |9 +
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 7785091..26dd79f 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -1098,7 +1098,7 @@ static const struct of_device_id omap_mcspi_of_match[] = {
};
MODULE_DEVICE_TABLE(of, omap_mcspi_of_match);
-static int __init omap2_mcspi_probe(struct platform_device *pdev)
+static int __devinit omap2_mcspi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct omap2_mcspi_platform_config *pdata;
@@ -1245,7 +1245,7 @@ free_master:
return status;
}
-static int __exit omap2_mcspi_remove(struct platform_device *pdev)
+static int __devexit omap2_mcspi_remove(struct platform_device *pdev)
{
struct spi_master *master;
struct omap2_mcspi *mcspi;
@@ -1320,13 +1320,14 @@ static struct platform_driver omap2_mcspi_driver = {
.pm = omap2_mcspi_pm_ops,
.of_match_table = omap_mcspi_of_match,
},
- .remove = __exit_p(omap2_mcspi_remove),
+ .probe =omap2_mcspi_probe,
+ .remove = __devexit_p(omap2_mcspi_remove),
};
static int __init omap2_mcspi_init(void)
{
- return platform_driver_probe(omap2_mcspi_driver, omap2_mcspi_probe);
+ return platform_driver_register(omap2_mcspi_driver);
}
subsys_initcall(omap2_mcspi_init);
--
1.7.1
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[PATCH v2 1/5] spi/omap: Remove bus_num usage for instance index
From: Benoit Cousson b-cous...@ti.com
bus_num was used to reference the mcspi controller instance in a fixed array.
Remove this array and store this information directly inside drvdata structure.
bus_num is now just set if the pdev-id is present or with -1 for dynamic
allocation by SPI core, but the driver does not access it anymore.
Clean some bad comments format, and remove un-needed space.
Signed-off-by: Benoit Cousson b-cous...@ti.com
[Cleanup the OMAP2_MCSPI_MAX_CTRL macro as it is not needed anymore]
Signed-off-by: Shubhrajyoti D shubhrajy...@ti.com
---
drivers/spi/spi-omap2-mcspi.c | 75 ++--
1 files changed, 34 insertions(+), 41 deletions(-)
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index bb9274c..7785091 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -45,9 +45,6 @@
#define OMAP2_MCSPI_MAX_FREQ 4800
-/* OMAP2 has 3 SPI controllers, while OMAP3 has 4 */
-#define OMAP2_MCSPI_MAX_CTRL 4
-
#define OMAP2_MCSPI_REVISION 0x00
#define OMAP2_MCSPI_SYSSTATUS 0x14
#define OMAP2_MCSPI_IRQSTATUS 0x18
@@ -111,6 +108,16 @@ struct omap2_mcspi_dma {
#define DMA_MIN_BYTES 160
+/*
+ * Used for context save and restore, structure members to be updated whenever
+ * corresponding registers are modified.
+ */
+struct omap2_mcspi_regs {
+ u32 modulctrl;
+ u32 wakeupenable;
+ struct list_head cs;
+};
+
struct omap2_mcspi {
struct work_struct work;
/* lock protects queue and registers */
@@ -122,8 +129,9 @@ struct omap2_mcspi {
unsigned long phys;
/* SPI1 has 4 channels, while SPI2 has 2 */
struct omap2_mcspi_dma *dma_channels;
- struct device *dev;
+ struct device *dev;
struct workqueue_struct *wq;
+ struct omap2_mcspi_regs ctx;
};
struct omap2_mcspi_cs {
@@ -135,17 +143,6 @@ struct omap2_mcspi_cs {
u32 chconf0;
};
-/* used for context save and restore, structure members to be updated whenever
- * corresponding registers are modified.
- */
-struct omap2_mcspi_regs {
- u32 modulctrl;
- u32 wakeupenable;
- struct list_head cs;
-};
-
-static struct omap2_mcspi_regs omap2_mcspi_ctx[OMAP2_MCSPI_MAX_CTRL];
-
#define MOD_REG_BIT(val, mask, set) do { \
if (set) \
val |= mask; \
@@ -236,9 +233,12 @@ static void omap2_mcspi_force_cs(struct spi_device *spi,
int cs_active)
static void omap2_mcspi_set_master_mode(struct spi_master *master)
{
+ struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
+ struct omap2_mcspi_regs *ctx = mcspi-ctx;
u32 l;
- /* setup when switching from (reset default) slave mode
+ /*
+* Setup when switching from (reset default) slave mode
* to single-channel master mode
*/
l = mcspi_read_reg(master, OMAP2_MCSPI_MODULCTRL);
@@ -247,24 +247,20 @@ static void omap2_mcspi_set_master_mode(struct spi_master
*master)
MOD_REG_BIT(l, OMAP2_MCSPI_MODULCTRL_SINGLE, 1);
mcspi_write_reg(master, OMAP2_MCSPI_MODULCTRL, l);
- omap2_mcspi_ctx[master-bus_num - 1].modulctrl = l;
+ ctx-modulctrl = l;
}
static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi)
{
- struct spi_master *spi_cntrl;
- struct omap2_mcspi_cs *cs;
- spi_cntrl = mcspi-master;
+ struct spi_master *spi_cntrl = mcspi-master;
+ struct omap2_mcspi_regs *ctx = mcspi-ctx;
+ struct omap2_mcspi_cs *cs;
/* McSPI: context restore */
- mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_MODULCTRL,
- omap2_mcspi_ctx[spi_cntrl-bus_num - 1].modulctrl);
+ mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_MODULCTRL, ctx-modulctrl);
+ mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE, ctx-wakeupenable);
- mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE,
- omap2_mcspi_ctx[spi_cntrl-bus_num - 1].wakeupenable);
-
- list_for_each_entry(cs, omap2_mcspi_ctx[spi_cntrl-bus_num - 1].cs,
- node)
+ list_for_each_entry(cs, ctx-cs, node)
__raw_writel(cs-chconf0, cs-base + OMAP2_MCSPI_CHCONF0);
}
static void omap2_mcspi_disable_clocks(struct omap2_mcspi *mcspi)
@@ -777,7 +773,8 @@ static int omap2_mcspi_request_dma(struct spi_device *spi)
static int omap2_mcspi_setup(struct spi_device *spi)
{
int ret;
- struct omap2_mcspi *mcspi;
+ struct omap2_mcspi *mcspi = spi_master_get_devdata(spi-master);
+ struct omap2_mcspi_regs *ctx = mcspi-ctx;
struct omap2_mcspi_dma *mcspi_dma;
struct omap2_mcspi_cs *cs = spi-controller_state;
@@ -787,7 +784,6 @@ static int omap2_mcspi_setup(struct spi_device *spi)
return -EINVAL;
}
-
[PATCH] spi-imx: Remove duplicate spi_imx_data definition
Structure struct spi_imx_data is defined twice.
Remove one of its definition.
Signed-off-by: Fabio Estevam fabio.este...@freescale.com
---
drivers/spi/spi-imx.c | 20 +---
1 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 31054e3..f1f6700 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -68,17 +68,6 @@ enum spi_imx_devtype {
IMX51_ECSPI,/* ECSPI on i.mx51 and later */
};
-struct spi_imx_data;
-
-struct spi_imx_devtype_data {
- void (*intctrl)(struct spi_imx_data *, int);
- int (*config)(struct spi_imx_data *, struct spi_imx_config *);
- void (*trigger)(struct spi_imx_data *);
- int (*rx_available)(struct spi_imx_data *);
- void (*reset)(struct spi_imx_data *);
- enum spi_imx_devtype devtype;
-};
-
struct spi_imx_data {
struct spi_bitbang bitbang;
@@ -99,6 +88,15 @@ struct spi_imx_data {
int chipselect[0];
};
+struct spi_imx_devtype_data {
+ void (*intctrl)(struct spi_imx_data *, int);
+ int (*config)(struct spi_imx_data *, struct spi_imx_config *);
+ void (*trigger)(struct spi_imx_data *);
+ int (*rx_available)(struct spi_imx_data *);
+ void (*reset)(struct spi_imx_data *);
+ enum spi_imx_devtype devtype;
+};
+
static inline int is_imx27_cspi(struct spi_imx_data *d)
{
return d-devtype_data-devtype == IMX27_CSPI;
--
1.7.1
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Re: [PATCH] spi-imx: Remove duplicate spi_imx_data definition
Hi Fabio,
On Mon, Mar 26, 2012 at 11:43 PM, Fabio Estevam
fabio.este...@freescale.com wrote:
Structure struct spi_imx_data is defined twice.
Remove one of its definition.
Signed-off-by: Fabio Estevam fabio.este...@freescale.com
---
drivers/spi/spi-imx.c | 20 +---
1 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 31054e3..f1f6700 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -68,17 +68,6 @@ enum spi_imx_devtype {
IMX51_ECSPI, /* ECSPI on i.mx51 and later */
};
-struct spi_imx_data;
-
-struct spi_imx_devtype_data {
- void (*intctrl)(struct spi_imx_data *, int);
- int (*config)(struct spi_imx_data *, struct spi_imx_config *);
- void (*trigger)(struct spi_imx_data *);
- int (*rx_available)(struct spi_imx_data *);
- void (*reset)(struct spi_imx_data *);
- enum spi_imx_devtype devtype;
-};
Is this change intentional
-
struct spi_imx_data {
struct spi_bitbang bitbang;
@@ -99,6 +88,15 @@ struct spi_imx_data {
int chipselect[0];
};
+struct spi_imx_devtype_data {
+ void (*intctrl)(struct spi_imx_data *, int);
+ int (*config)(struct spi_imx_data *, struct spi_imx_config *);
+ void (*trigger)(struct spi_imx_data *);
+ int (*rx_available)(struct spi_imx_data *);
+ void (*reset)(struct spi_imx_data *);
+ enum spi_imx_devtype devtype;
+};
+
static inline int is_imx27_cspi(struct spi_imx_data *d)
{
return d-devtype_data-devtype == IMX27_CSPI;
--
1.7.1
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Re: [PATCH] spi-imx: Remove duplicate spi_imx_data definition
Shubhrajyoti Datta wrote:
Hi Fabio,
On Mon, Mar 26, 2012 at 11:43 PM, Fabio Estevam
fabio.este...@freescale.com wrote:
Structure struct spi_imx_data is defined twice.
Remove one of its definition.
Signed-off-by: Fabio Estevam fabio.este...@freescale.com
---
drivers/spi/spi-imx.c | 20 +---
1 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 31054e3..f1f6700 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -68,17 +68,6 @@ enum spi_imx_devtype {
IMX51_ECSPI,/* ECSPI on i.mx51 and later */
};
-struct spi_imx_data;
-
-struct spi_imx_devtype_data {
- void (*intctrl)(struct spi_imx_data *, int);
- int (*config)(struct spi_imx_data *, struct spi_imx_config *);
- void (*trigger)(struct spi_imx_data *);
- int (*rx_available)(struct spi_imx_data *);
- void (*reset)(struct spi_imx_data *);
- enum spi_imx_devtype devtype;
-};
Is this change intentional
Yes, struct spi_imx_data must be defined prior to spi_imx_devtype_data.
Thanks,
Fabio Estevam
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[PATCH v2] spi-imx: Remove duplicate spi_imx_data definition
Structure struct spi_imx_data is defined twice.
Remove one of its definition.
In order to do so, it is also necessary to move spi_imx_devtype_data
structure after the definition of spi_imx_data.
Signed-off-by: Fabio Estevam fabio.este...@freescale.com
---
Changes since v1:
- Explain why I moved spi_imx_devtype_data location
drivers/spi/spi-imx.c | 20 +---
1 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 31054e3..f1f6700 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -68,17 +68,6 @@ enum spi_imx_devtype {
IMX51_ECSPI,/* ECSPI on i.mx51 and later */
};
-struct spi_imx_data;
-
-struct spi_imx_devtype_data {
- void (*intctrl)(struct spi_imx_data *, int);
- int (*config)(struct spi_imx_data *, struct spi_imx_config *);
- void (*trigger)(struct spi_imx_data *);
- int (*rx_available)(struct spi_imx_data *);
- void (*reset)(struct spi_imx_data *);
- enum spi_imx_devtype devtype;
-};
-
struct spi_imx_data {
struct spi_bitbang bitbang;
@@ -99,6 +88,15 @@ struct spi_imx_data {
int chipselect[0];
};
+struct spi_imx_devtype_data {
+ void (*intctrl)(struct spi_imx_data *, int);
+ int (*config)(struct spi_imx_data *, struct spi_imx_config *);
+ void (*trigger)(struct spi_imx_data *);
+ int (*rx_available)(struct spi_imx_data *);
+ void (*reset)(struct spi_imx_data *);
+ enum spi_imx_devtype devtype;
+};
+
static inline int is_imx27_cspi(struct spi_imx_data *d)
{
return d-devtype_data-devtype == IMX27_CSPI;
--
1.7.1
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Re: [PATCH] spi-imx: Remove duplicate spi_imx_data definition
On 3/26/2012 5:59 PM, Uwe Kleine-König wrote: In my version of drivers/spi/spi-imx.c struct spi_imx_data is only defined once. I guess you wanted to say forward declaration. Yes, correct. ... Does this really work? struct spi_imx_data has a member Yes, tested it on a mx31pdk board. Regards, Fabio Estevam -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
