* [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs
@ 2011-08-10 10:27 Heiko Stübner
2011-08-10 10:28 ` [PATCH 1/2] Remove hw_addr from s3c24XX dma channel declarations Heiko Stübner
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Heiko Stübner @ 2011-08-10 10:27 UTC (permalink / raw)
To: linux-arm-kernel
While trying to sort the dma for S3C2416 I stumbled open the hw_addr
declarations in the other dma.c files.
It took me a while to figure out that they seem to be some sort
of leftover, i.e. they are used in dma-pl080.c of the old Samsung
kernels based on 2.6.21 but nowhere in current kernels.
Therefore I think removing this stuff is appropriate.
The patches apply against current linux-next and are
compile-tested against s3c2410_defconfig and mini2440_defconfig.
Heiko Stuebner (2):
Remove hw_addr from s3c24XX dma channel declarations
Remove s3c24xx_dma_addr definition
arch/arm/mach-s3c2410/dma.c | 14 -----------
arch/arm/mach-s3c2412/dma.c | 18 --------------
arch/arm/mach-s3c2440/dma.c | 17 -------------
arch/arm/mach-s3c2443/dma.c | 27 ----------------------
arch/arm/plat-samsung/include/plat/dma-s3c24xx.h | 6 -----
5 files changed, 0 insertions(+), 82 deletions(-)
--
1.7.5.4
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 1/2] Remove hw_addr from s3c24XX dma channel declarations
2011-08-10 10:27 [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Heiko Stübner
@ 2011-08-10 10:28 ` Heiko Stübner
2011-08-10 10:30 ` [PATCH 2/2] Remove s3c24xx_dma_addr definition Heiko Stübner
2011-08-19 5:24 ` [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Kukjin Kim
2 siblings, 0 replies; 4+ messages in thread
From: Heiko Stübner @ 2011-08-10 10:28 UTC (permalink / raw)
To: linux-arm-kernel
According to commit c4806174c516d26bf4a72db1789cfc96e4950d07
(ARM: S3C2412: DMA: Remove I2S FIFO address) the S3C DMA API does not
make use of hw_addr.to/from declared for some of the channels in
mach-s3c24XX/dma.c
Grepping through the kernel also did non reveal any new users of
these properties since the mentioned commit.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
arch/arm/mach-s3c2410/dma.c | 14 --------------
arch/arm/mach-s3c2412/dma.c | 18 ------------------
arch/arm/mach-s3c2440/dma.c | 17 -----------------
arch/arm/mach-s3c2443/dma.c | 27 ---------------------------
4 files changed, 0 insertions(+), 76 deletions(-)
diff --git a/arch/arm/mach-s3c2410/dma.c b/arch/arm/mach-s3c2410/dma.c
index 0d8e043..dbe43df 100644
--- a/arch/arm/mach-s3c2410/dma.c
+++ b/arch/arm/mach-s3c2410/dma.c
@@ -47,38 +47,26 @@ static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
.channels[0] = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
.channels[2] = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
.channels[3] = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
- .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_SPI0] = {
.name = "spi0",
.channels[1] = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT,
},
[DMACH_SPI1] = {
.name = "spi1",
.channels[3] = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
},
[DMACH_UART0] = {
.name = "uart0",
.channels[0] = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
},
[DMACH_UART1] = {
.name = "uart1",
.channels[1] = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
},
[DMACH_UART2] = {
.name = "uart2",
.channels[3] = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
},
[DMACH_TIMER] = {
.name = "timer",
@@ -90,12 +78,10 @@ static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
.name = "i2s-sdi",
.channels[1] = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
.channels[2] = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
- .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_I2S_OUT] = {
.name = "i2s-sdo",
.channels[2] = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_USB_EP1] = {
.name = "usb-ep1",
diff --git a/arch/arm/mach-s3c2412/dma.c b/arch/arm/mach-s3c2412/dma.c
index 7abecfc..c61e326 100644
--- a/arch/arm/mach-s3c2412/dma.c
+++ b/arch/arm/mach-s3c2412/dma.c
@@ -50,64 +50,46 @@ static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
.name = "sdi",
.channels = MAP(S3C2412_DMAREQSEL_SDI),
.channels_rx = MAP(S3C2412_DMAREQSEL_SDI),
- .hw_addr.to = S3C2410_PA_SDI + S3C2410_SDIDATA,
- .hw_addr.from = S3C2410_PA_SDI + S3C2410_SDIDATA,
},
[DMACH_SPI0] = {
.name = "spi0",
.channels = MAP(S3C2412_DMAREQSEL_SPI0TX),
.channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX),
- .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT,
},
[DMACH_SPI1] = {
.name = "spi1",
.channels = MAP(S3C2412_DMAREQSEL_SPI1TX),
.channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX),
- .hw_addr.to = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPRDAT,
},
[DMACH_UART0] = {
.name = "uart0",
.channels = MAP(S3C2412_DMAREQSEL_UART0_0),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART0_0),
- .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
},
[DMACH_UART1] = {
.name = "uart1",
.channels = MAP(S3C2412_DMAREQSEL_UART1_0),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART1_0),
- .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
},
[DMACH_UART2] = {
.name = "uart2",
.channels = MAP(S3C2412_DMAREQSEL_UART2_0),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0),
- .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
},
[DMACH_UART0_SRC2] = {
.name = "uart0",
.channels = MAP(S3C2412_DMAREQSEL_UART0_1),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART0_1),
- .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
},
[DMACH_UART1_SRC2] = {
.name = "uart1",
.channels = MAP(S3C2412_DMAREQSEL_UART1_1),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART1_1),
- .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
},
[DMACH_UART2_SRC2] = {
.name = "uart2",
.channels = MAP(S3C2412_DMAREQSEL_UART2_1),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1),
- .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
},
[DMACH_TIMER] = {
.name = "timer",
diff --git a/arch/arm/mach-s3c2440/dma.c b/arch/arm/mach-s3c2440/dma.c
index 3b0529f..0e73f8f 100644
--- a/arch/arm/mach-s3c2440/dma.c
+++ b/arch/arm/mach-s3c2440/dma.c
@@ -48,38 +48,26 @@ static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
.channels[1] = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
.channels[2] = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
.channels[3] = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
- .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_SPI0] = {
.name = "spi0",
.channels[1] = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT,
},
[DMACH_SPI1] = {
.name = "spi1",
.channels[3] = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
},
[DMACH_UART0] = {
.name = "uart0",
.channels[0] = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
},
[DMACH_UART1] = {
.name = "uart1",
.channels[1] = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
},
[DMACH_UART2] = {
.name = "uart2",
.channels[3] = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
},
[DMACH_TIMER] = {
.name = "timer",
@@ -91,31 +79,26 @@ static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
.name = "i2s-sdi",
.channels[1] = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
.channels[2] = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
- .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_I2S_OUT] = {
.name = "i2s-sdo",
.channels[0] = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
.channels[2] = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
- .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_PCM_IN] = {
.name = "pcm-in",
.channels[0] = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
.channels[2] = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
- .hw_addr.from = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
},
[DMACH_PCM_OUT] = {
.name = "pcm-out",
.channels[1] = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
.channels[3] = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
- .hw_addr.to = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
},
[DMACH_MIC_IN] = {
.name = "mic-in",
.channels[2] = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
.channels[3] = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
- .hw_addr.from = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
},
[DMACH_USB_EP1] = {
.name = "usb-ep1",
diff --git a/arch/arm/mach-s3c2443/dma.c b/arch/arm/mach-s3c2443/dma.c
index 3f65868..fe52151 100644
--- a/arch/arm/mach-s3c2443/dma.c
+++ b/arch/arm/mach-s3c2443/dma.c
@@ -54,68 +54,46 @@ static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
[DMACH_SDI] = {
.name = "sdi",
.channels = MAP(S3C2443_DMAREQSEL_SDI),
- .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
- .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_SPI0] = {
.name = "spi0",
.channels = MAP(S3C2443_DMAREQSEL_SPI0TX),
- .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT,
},
[DMACH_SPI1] = {
.name = "spi1",
.channels = MAP(S3C2443_DMAREQSEL_SPI1TX),
- .hw_addr.to = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
- .hw_addr.from = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
},
[DMACH_UART0] = {
.name = "uart0",
.channels = MAP(S3C2443_DMAREQSEL_UART0_0),
- .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
},
[DMACH_UART1] = {
.name = "uart1",
.channels = MAP(S3C2443_DMAREQSEL_UART1_0),
- .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
},
[DMACH_UART2] = {
.name = "uart2",
.channels = MAP(S3C2443_DMAREQSEL_UART2_0),
- .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
},
[DMACH_UART3] = {
.name = "uart3",
.channels = MAP(S3C2443_DMAREQSEL_UART3_0),
- .hw_addr.to = S3C2443_PA_UART3 + S3C2410_UTXH,
- .hw_addr.from = S3C2443_PA_UART3 + S3C2410_URXH,
},
[DMACH_UART0_SRC2] = {
.name = "uart0",
.channels = MAP(S3C2443_DMAREQSEL_UART0_1),
- .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
},
[DMACH_UART1_SRC2] = {
.name = "uart1",
.channels = MAP(S3C2443_DMAREQSEL_UART1_1),
- .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
},
[DMACH_UART2_SRC2] = {
.name = "uart2",
.channels = MAP(S3C2443_DMAREQSEL_UART2_1),
- .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
- .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
},
[DMACH_UART3_SRC2] = {
.name = "uart3",
.channels = MAP(S3C2443_DMAREQSEL_UART3_1),
- .hw_addr.to = S3C2443_PA_UART3 + S3C2410_UTXH,
- .hw_addr.from = S3C2443_PA_UART3 + S3C2410_URXH,
},
[DMACH_TIMER] = {
.name = "timer",
@@ -124,27 +102,22 @@ static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
[DMACH_I2S_IN] = {
.name = "i2s-sdi",
.channels = MAP(S3C2443_DMAREQSEL_I2SRX),
- .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_I2S_OUT] = {
.name = "i2s-sdo",
.channels = MAP(S3C2443_DMAREQSEL_I2STX),
- .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
},
[DMACH_PCM_IN] = {
.name = "pcm-in",
.channels = MAP(S3C2443_DMAREQSEL_PCMIN),
- .hw_addr.from = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
},
[DMACH_PCM_OUT] = {
.name = "pcm-out",
.channels = MAP(S3C2443_DMAREQSEL_PCMOUT),
- .hw_addr.to = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
},
[DMACH_MIC_IN] = {
.name = "mic-in",
.channels = MAP(S3C2443_DMAREQSEL_MICIN),
- .hw_addr.from = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
},
};
--
1.7.5.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] Remove s3c24xx_dma_addr definition
2011-08-10 10:27 [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Heiko Stübner
2011-08-10 10:28 ` [PATCH 1/2] Remove hw_addr from s3c24XX dma channel declarations Heiko Stübner
@ 2011-08-10 10:30 ` Heiko Stübner
2011-08-19 5:24 ` [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Kukjin Kim
2 siblings, 0 replies; 4+ messages in thread
From: Heiko Stübner @ 2011-08-10 10:30 UTC (permalink / raw)
To: linux-arm-kernel
As all users of s3c24xx_dma_addr are gone now, remove it completely.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
arch/arm/plat-samsung/include/plat/dma-s3c24xx.h | 6 ------
1 files changed, 0 insertions(+), 6 deletions(-)
diff --git a/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h b/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
index 336d5ac..ab9bce6 100644
--- a/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
+++ b/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
@@ -18,11 +18,6 @@ extern struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];
#define DMA_CH_VALID (1<<31)
#define DMA_CH_NEVER (1<<30)
-struct s3c24xx_dma_addr {
- unsigned long from;
- unsigned long to;
-};
-
/* struct s3c24xx_dma_map
*
* this holds the mapping information for the channel selected
@@ -31,7 +26,6 @@ struct s3c24xx_dma_addr {
struct s3c24xx_dma_map {
const char *name;
- struct s3c24xx_dma_addr hw_addr;
unsigned long channels[S3C_DMA_CHANNELS];
unsigned long channels_rx[S3C_DMA_CHANNELS];
--
1.7.5.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs
2011-08-10 10:27 [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Heiko Stübner
2011-08-10 10:28 ` [PATCH 1/2] Remove hw_addr from s3c24XX dma channel declarations Heiko Stübner
2011-08-10 10:30 ` [PATCH 2/2] Remove s3c24xx_dma_addr definition Heiko Stübner
@ 2011-08-19 5:24 ` Kukjin Kim
2 siblings, 0 replies; 4+ messages in thread
From: Kukjin Kim @ 2011-08-19 5:24 UTC (permalink / raw)
To: linux-arm-kernel
Heiko St?bner wrote:
>
> While trying to sort the dma for S3C2416 I stumbled open the hw_addr
> declarations in the other dma.c files.
>
> It took me a while to figure out that they seem to be some sort
> of leftover, i.e. they are used in dma-pl080.c of the old Samsung
> kernels based on 2.6.21 but nowhere in current kernels.
>
> Therefore I think removing this stuff is appropriate.
>
> The patches apply against current linux-next and are
> compile-tested against s3c2410_defconfig and mini2440_defconfig.
>
> Heiko Stuebner (2):
> Remove hw_addr from s3c24XX dma channel declarations
> Remove s3c24xx_dma_addr definition
>
> arch/arm/mach-s3c2410/dma.c | 14 -----------
> arch/arm/mach-s3c2412/dma.c | 18 --------------
> arch/arm/mach-s3c2440/dma.c | 17 -------------
> arch/arm/mach-s3c2443/dma.c | 27
----------------------
> arch/arm/plat-samsung/include/plat/dma-s3c24xx.h | 6 -----
> 5 files changed, 0 insertions(+), 82 deletions(-)
>
> --
> 1.7.5.4
Good :)
Applied, thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2011-08-10 10:27 [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Heiko Stübner
2011-08-10 10:28 ` [PATCH 1/2] Remove hw_addr from s3c24XX dma channel declarations Heiko Stübner
2011-08-10 10:30 ` [PATCH 2/2] Remove s3c24xx_dma_addr definition Heiko Stübner
2011-08-19 5:24 ` [PATCH 0/2] Remove hw_addr dma leftovers from S3C24xx machs Kukjin Kim
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