On Monday, March 03, 2014 at 11:23:33 AM, Yao Yuan wrote:
> Hi, Marek
>
> Marek Vasut wrote:
> > On Thursday, February 27, 2014 at 07:05:14 AM, Yuan Yao wrote:
> >
> > [...]
> >
> > > +static void i2c_imx_dma_free(struct imx_i2c_struct *i2c_imx) {
> > > + struct imx_i2c_dma *dma = i2c_imx->dma;
Hi, Marek
Marek Vasut wrote:
> On Thursday, February 27, 2014 at 07:05:14 AM, Yuan Yao wrote:
>
> [...]
>
> > +static void i2c_imx_dma_free(struct imx_i2c_struct *i2c_imx) {
> > + struct imx_i2c_dma *dma = i2c_imx->dma;
> > + struct dma_chan *dma_chan;
> > +
> > + dma_chan = dma->chan_tx;
On Friday, February 28, 2014 at 11:59:25 AM, Lothar Waßmann wrote:
> Hi,
>
> Marek Vasut wrote:
> > On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
> >
> > [...]
> >
> > > Yes, here have two dma channels, one for RX and the other one for TX.
> > > When we request the channel we shou
On Friday, February 28, 2014 at 12:36:01 PM, Yao Yuan wrote:
> Hi Marek,
>
> > On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
> >
> > [...]
> >
> > > > > @@ -213,6 +238,7 @@ static struct imx_i2c_hwdata vf610_i2c_hwdata
> > > > > = {
> > > > >
> > > > > .ndivs
Hi Marek,
> On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
>
> [...]
>
> > > > @@ -213,6 +238,7 @@ static struct imx_i2c_hwdata vf610_i2c_hwdata
> > > > = {
> > > >
> > > > .ndivs = ARRAY_SIZE(vf610_i2c_clk_div),
> > > > .i2sr_clr_opcode= I2S
Hi,
Marek Vasut wrote:
> On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
>
> [...]
> > Yes, here have two dma channels, one for RX and the other one for TX.
> > When we request the channel we should determine it for TX or RX.
>
> Sorry, I don't quite understand this. If you have two
On Friday, February 28, 2014 at 03:23:52 AM, Shawn Guo wrote:
> On Fri, Feb 28, 2014 at 10:13:02AM +0800, Shawn Guo wrote:
> > On Thu, Feb 27, 2014 at 09:39:35PM +0100, Marek Vasut wrote:
> > > > @@ -193,6 +216,7 @@ static const struct imx_i2c_hwdata
> > > > imx1_i2c_hwdata = {
> > > >
> > > >
On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
[...]
> > > @@ -213,6 +238,7 @@ static struct imx_i2c_hwdata vf610_i2c_hwdata = {
> > >
> > > .ndivs = ARRAY_SIZE(vf610_i2c_clk_div),
> > > .i2sr_clr_opcode= I2SR_CLR_OPCODE_W1C,
> > > .i2cr_ien_opcode
awn@linaro.org; linux-kernel@vger.kernel.org; linux-
> i...@vger.kernel.org
> Subject: Re: [PATCH 1/3] i2c: add DMA support for freescale i2c driver
>
> On Thursday, February 27, 2014 at 07:05:14 AM, Yuan Yao wrote:
>
> [...]
>
> > */ @@ -63,6 +68,9 @@
> >
On Fri, Feb 28, 2014 at 10:13:02AM +0800, Shawn Guo wrote:
> On Thu, Feb 27, 2014 at 09:39:35PM +0100, Marek Vasut wrote:
> > > @@ -193,6 +216,7 @@ static const struct imx_i2c_hwdata imx1_i2c_hwdata =
> > > {
> > > .ndivs = ARRAY_SIZE(imx_i2c_clk_div),
> > > .i2sr_clr_opcode
On Thu, Feb 27, 2014 at 09:39:35PM +0100, Marek Vasut wrote:
> > @@ -193,6 +216,7 @@ static const struct imx_i2c_hwdata imx1_i2c_hwdata = {
> > .ndivs = ARRAY_SIZE(imx_i2c_clk_div),
> > .i2sr_clr_opcode= I2SR_CLR_OPCODE_W0C,
> > .i2cr_ien_opcode= I2CR_I
On Thursday, February 27, 2014 at 07:05:14 AM, Yuan Yao wrote:
[...]
> */ @@ -63,6 +68,9 @@
> /* Default value */
> #define IMX_I2C_BIT_RATE 10 /* 100kHz */
>
> +/* enable DMA if transfer size is bigger than this threshold */
> +#define IMX_I2C_DMA_THRESHOLD16
So what's t
On Thu, Feb 27, 2014 at 08:55:45PM +0800, Shawn Guo wrote:
> On Thu, Feb 27, 2014 at 02:05:14PM +0800, Yuan Yao wrote:
> > Add dma support for i2c. This function depend on DMA driver.
> > You can turn on it by write both the dmas and dma-name properties in dts
> > node.
> > And you should set ".ha
On Thu, Feb 27, 2014 at 02:05:14PM +0800, Yuan Yao wrote:
> Add dma support for i2c. This function depend on DMA driver.
> You can turn on it by write both the dmas and dma-name properties in dts node.
> And you should set ".has_dma_support" as true for dma support in
> imx_i2c_hwdata struct.
>
>
Add dma support for i2c. This function depend on DMA driver.
You can turn on it by write both the dmas and dma-name properties in dts node.
And you should set ".has_dma_support" as true for dma support in imx_i2c_hwdata
struct.
Signed-off-by: Yuan Yao
---
drivers/i2c/busses/i2c-imx.c | 358
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