Votre facture vétérinaire enfin remboursée
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Re: [PATCH] spi/pl022: Activate resourses before deactivate them in suspend
On Sun, 28 Oct 2012, Ulf Hansson wrote: > On 28 October 2012 20:52, Linus Walleij wrote: > > On Sat, Oct 27, 2012 at 11:46 PM, Mark Brown > > wrote: > >> On Fri, Oct 05, 2012 at 09:43:32AM +0200, Ulf Hansson wrote: > >> > >>> To be able to deactivate resourses in suspend, the resourses must > >>> first be surely active. This is done with a pm_runtime_get_sync. > >>> Once the resourses are restored to active state again in resume, > >>> the runtime pm usage count can be decreased with a pm_runtime_put. > >> > >> The PM core will ensure devices are runtime resumed before we enter > >> suspend precisely due to this sort of issue. > > > > I asked the very same question to Ulf (in speech, sorry > > so you couldn't see it...) > > > > So I guess we are talking about drivers/base/main.c > > > > in device_prepare() > > pm_runtime_get_noresume() is called > > This will increase the "usage_counter" for the device. It will not > "runtime_resume" the device, though it will prevent it from being > "runtime_suspended". Indeed. The PM core does _not_ insure that devices are runtime resumed before going into system suspend. Some subsystems may do this (the PCI subsystem does, for example -- see drivers/pci/pci-driver.c:pci_pm_prepare()), but the PM core doesn't. Alan Stern -- WINDOWS 8 is here. Millions of people. Your app in 30 days. Visit The Windows 8 Center at Sourceforge for all your go to resources. http://windows8center.sourceforge.net/ join-generation-app-and-make-money-coding-fast/ ___ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
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Re: [PATCH] spi/pl022: Activate resourses before deactivate them in suspend
On 28 October 2012 20:52, Linus Walleij wrote: > On Sat, Oct 27, 2012 at 11:46 PM, Mark Brown > wrote: >> On Fri, Oct 05, 2012 at 09:43:32AM +0200, Ulf Hansson wrote: >> >>> To be able to deactivate resourses in suspend, the resourses must >>> first be surely active. This is done with a pm_runtime_get_sync. >>> Once the resourses are restored to active state again in resume, >>> the runtime pm usage count can be decreased with a pm_runtime_put. >> >> The PM core will ensure devices are runtime resumed before we enter >> suspend precisely due to this sort of issue. > > I asked the very same question to Ulf (in speech, sorry > so you couldn't see it...) > > So I guess we are talking about drivers/base/main.c > > in device_prepare() > pm_runtime_get_noresume() is called This will increase the "usage_counter" for the device. It will not "runtime_resume" the device, though it will prevent it from being "runtime_suspended". > and in device_complete() > pm_runtime_put_sync() is called. > > Both put into current for in > commit 88d26136a256576e444db312179e17af6dd0ea87 > on sep 19th. > > Yes it seems like it will do the job. > > Ulf can you comment on this... > > Yours, > Linus Walleij Kind regards Ulf Hansson -- WINDOWS 8 is here. Millions of people. Your app in 30 days. Visit The Windows 8 Center at Sourceforge for all your go to resources. http://windows8center.sourceforge.net/ join-generation-app-and-make-money-coding-fast/ ___ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
Re: [PATCH] spi/pl022: Activate resourses before deactivate them in suspend
On Sat, Oct 27, 2012 at 11:46 PM, Mark Brown wrote: > On Fri, Oct 05, 2012 at 09:43:32AM +0200, Ulf Hansson wrote: > >> To be able to deactivate resourses in suspend, the resourses must >> first be surely active. This is done with a pm_runtime_get_sync. >> Once the resourses are restored to active state again in resume, >> the runtime pm usage count can be decreased with a pm_runtime_put. > > The PM core will ensure devices are runtime resumed before we enter > suspend precisely due to this sort of issue. I asked the very same question to Ulf (in speech, sorry so you couldn't see it...) So I guess we are talking about drivers/base/main.c in device_prepare() pm_runtime_get_noresume() is called and in device_complete() pm_runtime_put_sync() is called. Both put into current for in commit 88d26136a256576e444db312179e17af6dd0ea87 on sep 19th. Yes it seems like it will do the job. Ulf can you comment on this... Yours, Linus Walleij -- WINDOWS 8 is here. Millions of people. Your app in 30 days. Visit The Windows 8 Center at Sourceforge for all your go to resources. http://windows8center.sourceforge.net/ join-generation-app-and-make-money-coding-fast/ ___ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
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[PATCH RESEND] spi-pxa2xx: fix memory corruption
pxa2xx_spi_probe allocates struct driver_data and null_dma_buf
at same time via spi_alloc_master(), but then calculates
null_dma_buf pointer incorrectly, and it causes memory corruption
later if DMA usage is enabled.
Signed-off-by: Vasily Khoruzhick
---
Rebased against v3.7-rc2
drivers/spi/spi-pxa2xx.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index dc25bee..b25fe27 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -106,6 +106,7 @@ struct driver_data {
int rx_channel;
int tx_channel;
u32 *null_dma_buf;
+ u8 null_dma_buf_unaligned[16];
/* SSP register addresses */
void __iomem *ioaddr;
@@ -1543,8 +1544,8 @@ static int __devinit pxa2xx_spi_probe(struct
platform_device *pdev)
return -ENODEV;
}
- /* Allocate master with space for drv_data and null dma buffer */
- master = spi_alloc_master(dev, sizeof(struct driver_data) + 16);
+ /* Allocate master with space for drv_data */
+ master = spi_alloc_master(dev, sizeof(struct driver_data));
if (!master) {
dev_err(&pdev->dev, "cannot alloc spi_master\n");
pxa_ssp_free(ssp);
@@ -1569,8 +1570,8 @@ static int __devinit pxa2xx_spi_probe(struct
platform_device *pdev)
master->transfer = transfer;
drv_data->ssp_type = ssp->type;
- drv_data->null_dma_buf = (u32 *)ALIGN((u32)(drv_data +
- sizeof(struct driver_data)), 8);
+ drv_data->null_dma_buf =
+ (u32 *)PTR_ALIGN(&drv_data->null_dma_buf_unaligned, 8);
drv_data->ioaddr = ssp->mmio_base;
drv_data->ssdr_physical = ssp->phys_base + SSDR;
--
1.7.12.4
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Re: [RFC PATCH v3 16/16] ARM: dts: add AM33XX SPI support
On 10/18/2012 6:56 PM, Matt Porter wrote:
> Adds AM33XX SPI support for am335x-bone and am335x-evm.
>
> Signed-off-by: Matt Porter
> ---
> arch/arm/boot/dts/am335x-bone.dts | 17 +++
> arch/arm/boot/dts/am335x-evm.dts |9
> arch/arm/boot/dts/am33xx.dtsi | 43
> +
> 3 files changed, 69 insertions(+)
>
> diff --git a/arch/arm/boot/dts/am335x-bone.dts
> b/arch/arm/boot/dts/am335x-bone.dts
> index 5510979..23edfd8 100644
> --- a/arch/arm/boot/dts/am335x-bone.dts
> +++ b/arch/arm/boot/dts/am335x-bone.dts
> @@ -18,6 +18,17 @@
> reg = <0x8000 0x1000>; /* 256 MB */
> };
>
> + am3358_pinmux: pinmux@44e10800 {
> + spi1_pins: pinmux_spi1_pins {
> + pinctrl-single,pins = <
> + 0x190 0x13 /* mcasp0_aclkx.spi1_sclk,
> OUTPUT_PULLUP | MODE3 */
> + 0x194 0x33 /* mcasp0_fsx.spi1_d0,
> INPUT_PULLUP | MODE3 */
> + 0x198 0x13 /* mcasp0_axr0.spi1_d1,
> OUTPUT_PULLUP | MODE3 */
> + 0x19c 0x13 /* mcasp0_ahclkr.spi1_cs0,
> OUTPUT_PULLUP | MODE3 */
> + >;
Is there a single pinmux setting that provides SPI functionality on the
bone headers? Or this is specific to a cape you tested with?
Thanks,
Sekhar
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Re: [RFC PATCH v3 08/16] ARM: dts: add AM33XX EDMA support
On 10/18/2012 6:56 PM, Matt Porter wrote:
> Adds AM33XX EDMA support to the am33xx.dtsi as documented in
> Documentation/devicetree/bindings/dma/ti-edma.txt
>
> Signed-off-by: Matt Porter
> ---
> arch/arm/boot/dts/am33xx.dtsi | 31 +++
> 1 file changed, 31 insertions(+)
>
> diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> index bb31bff..ab9c78f 100644
> --- a/arch/arm/boot/dts/am33xx.dtsi
> +++ b/arch/arm/boot/dts/am33xx.dtsi
> @@ -62,6 +62,37 @@
> reg = <0x4820 0x1000>;
> };
>
> + edma: edma@4900 {
> + compatible = "ti,edma3";
> + ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";
> + reg = <0x4900 0x1>,
> + <0x44e10f90 0x10>;
> + interrupt-parent = <&intc>;
> + interrupts = <12 13 14>;
> + #dma-cells = <1>;
> + dma-channels = <64>;
> + ti,edma-regions = <4>;
> + ti,edma-slots = <256>;
> + ti,edma-reserved-channels = <0 2
> + 14 2
> + 26 6
> + 48 4
> + 56 8>;
> + ti,edma-reserved-slots = <0 2
> + 14 2
> + 26 6
> + 48 4
> + 56 8
> + 64 127>;
No need to reserve any channels or slots on AM335x, I think. This is
used on DaVinci devices to share channels with DSP. I am not sure the
cortex-M3 or PRU on the AM335x need to (or even can) have EDMA access.
Thanks,
Sekhar
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Re: [RFC PATCH v3 05/16] ARM: edma: add AM33XX crossbar event support
On 10/18/2012 6:56 PM, Matt Porter wrote:
> Adds support for the per-EDMA channel event mux. This is required
> for any peripherals using DMA crossbar mapped events.
>
> Signed-off-by: Matt Porter
> ---
> arch/arm/common/edma.c | 63
> +++-
> include/linux/platform_data/edma.h |1 +
> 2 files changed, 63 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
> index 6d2a590..b761b7a 100644
> --- a/arch/arm/common/edma.c
> +++ b/arch/arm/common/edma.c
> @@ -1425,6 +1425,53 @@ static int edma_of_read_u32_to_s16_array(const struct
> device_node *np,
> return 0;
> }
>
> +static int edma_xbar_event_map(struct device *dev,
> +struct device_node *node,
> +struct edma_soc_info *pdata, int len)
> +{
> + int ret = 0;
> + int i;
> + struct resource res;
> + void *xbar;
> + s16 (*xbar_chans)[2];
> + u32 shift, offset, mux;
> +
> + xbar_chans = devm_kzalloc(dev,
> + len/sizeof(s16) + 2*sizeof(s16),
> + GFP_KERNEL);
> + if (!xbar_chans)
> + return -ENOMEM;
> +
> + ret = of_address_to_resource(node, 1, &res);
> + if (IS_ERR_VALUE(ret))
> + return -EIO;
> +
> + xbar = devm_ioremap(dev, res.start, resource_size(&res));
> + if (!xbar)
> + return -EIO;
-ENOMEM is more appropiate for ioremap failures.
> +
> + ret = edma_of_read_u32_to_s16_array(node,
> + "ti,edma-xbar-event-map",
> + (s16 *)xbar_chans,
> + len/sizeof(u32));
> + if (IS_ERR_VALUE(ret))
> + return -EIO;
> +
> + for (i = 0; xbar_chans[i][0] != -1; i++) {
> + shift = (xbar_chans[i][1] % 4) * 8;
> + offset = xbar_chans[i][1] >> 2;
> + offset <<= 2;
> + mux = __raw_readl((void *)((u32)xbar + offset));
Dont use __raw* variants of io accessors. There will be ordering issues
on ARMv7.
> + mux &= (~(0xff << shift));
> + mux |= (xbar_chans[i][0] << shift);
Unnecessary parens above.
> + __raw_writel(mux, (void *)((u32)xbar + offset));
> + }
> +
> + pdata->xbar_chans = xbar_chans;
> +
> + return 0;
> +}
> +
> static int edma_of_parse_dt(struct device *dev,
> struct device_node *node,
> struct edma_soc_info *pdata)
> @@ -1453,7 +1500,6 @@ static int edma_of_parse_dt(struct device *dev,
> pdata->n_slot = value;
>
> pdata->n_cc = 1;
> - /* This is unused */
The comment should have not been part of 4/16?
Thanks,
Sekhar
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Re: [RFC PATCH v3 04/16] ARM: edma: add DT and runtime PM support for AM33XX
On 10/18/2012 6:56 PM, Matt Porter wrote:
> Adds support for parsing the TI EDMA DT data into the required
> EDMA private API platform data.
>
> Calls runtime PM API only in the DT case in order to unidle the
> associated hwmods on AM33XX.
Runtime PM is supported on DaVinci now, so if that was the reason for
this choice, then it doesn't need to be that way.
>
> Signed-off-by: Matt Porter
> ---
> arch/arm/common/edma.c | 255
> +--
> arch/arm/mach-davinci/board-da830-evm.c |4 +-
> arch/arm/mach-davinci/board-da850-evm.c |8 +-
> arch/arm/mach-davinci/board-dm646x-evm.c|4 +-
> arch/arm/mach-davinci/board-omapl138-hawk.c |8 +-
> arch/arm/mach-davinci/devices-da8xx.c |8 +-
> arch/arm/mach-davinci/devices-tnetv107x.c |4 +-
> arch/arm/mach-davinci/dm355.c |4 +-
> arch/arm/mach-davinci/dm365.c |4 +-
> arch/arm/mach-davinci/dm644x.c |4 +-
> arch/arm/mach-davinci/dm646x.c |4 +-
> include/linux/platform_data/edma.h |8 +-
> 12 files changed, 272 insertions(+), 43 deletions(-)
>
> diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
> index a3d189d..6d2a590 100644
> --- a/arch/arm/common/edma.c
> +++ b/arch/arm/common/edma.c
> @@ -24,6 +24,13 @@
> #include
> #include
> #include
> +#include
> +#include
> +#include
> +#include
> +#include
> +#include
> +#include
>
> #include
>
> @@ -1366,31 +1373,237 @@ void edma_clear_event(unsigned channel)
> EXPORT_SYMBOL(edma_clear_event);
>
> /*---*/
> +static int edma_of_read_u32_to_s8_array(const struct device_node *np,
> + const char *propname, s8 *out_values,
> + size_t sz)
> +{
> + struct property *prop = of_find_property(np, propname, NULL);
> + const __be32 *val;
> +
> + if (!prop)
> + return -EINVAL;
> + if (!prop->value)
> + return -ENODATA;
> + if ((sz * sizeof(u32)) > prop->length)
> + return -EOVERFLOW;
> +
> + val = prop->value;
> +
> + while (sz--)
> + *out_values++ = (s8)(be32_to_cpup(val++) & 0xff);
> +
> + /* Terminate it */
> + *out_values++ = -1;
> + *out_values++ = -1;
> +
> + return 0;
> +}
> +
> +static int edma_of_read_u32_to_s16_array(const struct device_node *np,
> + const char *propname, s16 *out_values,
> + size_t sz)
> +{
> + struct property *prop = of_find_property(np, propname, NULL);
> + const __be32 *val;
> +
> + if (!prop)
> + return -EINVAL;
> + if (!prop->value)
> + return -ENODATA;
> + if ((sz * sizeof(u32)) > prop->length)
> + return -EOVERFLOW;
> +
> + val = prop->value;
> +
> + while (sz--)
> + *out_values++ = (s16)(be32_to_cpup(val++) & 0x);
> +
> + /* Terminate it */
> + *out_values++ = -1;
> + *out_values++ = -1;
> +
> + return 0;
> +}
I think these helper functions will have some general use beyond EDMA
and can be kept in drivers/of/base.c. Grant/Rob need to agree though.
> diff --git a/arch/arm/mach-davinci/board-da830-evm.c
> b/arch/arm/mach-davinci/board-da830-evm.c
> index 95b5e10..ffcbec1 100644
> --- a/arch/arm/mach-davinci/board-da830-evm.c
> +++ b/arch/arm/mach-davinci/board-da830-evm.c
> @@ -512,7 +512,7 @@ static struct davinci_i2c_platform_data
> da830_evm_i2c_0_pdata = {
> * example: Timer, GPIO, UART events etc) on da830/omap-l137 EVM, hence
> * they are being reserved for codecs on the DSP side.
> */
> -static const s16 da830_dma_rsv_chans[][2] = {
> +static s16 da830_dma_rsv_chans[][2] = {
I wonder why you had to remove const here and in other places. You seem
to be allocating new memory for DT case anyway. Its also not a good idea
to modify the passed platform data.
Thanks,
Sekhar
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Re: [RFC PATCH v3 02/16] ARM: davinci: move private EDMA API to arm/common
On 10/18/2012 6:56 PM, Matt Porter wrote:
> Move mach-davinci/dma.c to common/edma.c so it can be used
> by OMAP (specifically AM33xx) as well. This just moves the
> private EDMA API but does not support OMAP.
>
> Signed-off-by: Matt Porter
> ---
> diff --git a/arch/arm/mach-davinci/devices.c b/arch/arm/mach-davinci/devices.c
> index 4c48a36..f45d591 100644
> --- a/arch/arm/mach-davinci/devices.c
> +++ b/arch/arm/mach-davinci/devices.c
> @@ -19,9 +19,10 @@
> #include
> #include
> #include
> -#include
> #include
> #include
> +#include
Can you please introduce a patch to clean this mixture of linux/ and
mach/ includes?
> +
>
> #include "davinci.h"
> #include "clock.h"
> @@ -141,10 +142,10 @@ static struct resource mmcsd0_resources[] = {
> },
> /* DMA channels: RX, then TX */
> {
> - .start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCRXEVT),
> + .start = EDMA_CTLR_CHAN(0, 26),
Instead of just replacing the event #defines with plain numbers, can you
introduce a mach-davinci local edma.h which can then be included in the
davinci platform files which refer to edma channel numbers?
> diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
> index 7cd56ed..153fab8 100644
> --- a/arch/arm/plat-omap/Kconfig
> +++ b/arch/arm/plat-omap/Kconfig
> @@ -28,6 +28,7 @@ config ARCH_OMAP2PLUS
> select OMAP_DM_TIMER
> select PROC_DEVICETREE if PROC_FS
> select SPARSE_IRQ
> + select TI_PRIV_EDMA
This hunk does not seem to belong to subject of this patch.
> select USE_OF
> help
> "Systems based on OMAP2, OMAP3, OMAP4 or OMAP5"
> diff --git a/include/linux/platform_data/edma.h
> b/include/linux/platform_data/edma.h
> new file mode 100644
> index 000..7396f0b3
> --- /dev/null
> +++ b/include/linux/platform_data/edma.h
> @@ -0,0 +1,198 @@
> +/*
> + * TI DAVINCI dma definitions
> + *
> + * Copyright (C) 2006-2009 Texas Instruments.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or (at your
> + * option) any later version.
> + *
> + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
> + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
> + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
> + * NO EVENT SHALL THE AUTHOR BELIABLE FOR ANY DIRECT, INDIRECT,
> + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
> + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
> + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
> + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
> + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, write to the Free Software Foundation, Inc.,
> + * 675 Mass Ave, Cambridge, MA 02139, USA.
This part can be dropped, I suppose ;-)
Thanks,
Sekhar
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