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ARM: pxa: add the number of DMA requestor lines

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Declare the number of DMA requestor lines per platform :
 - for pxa25x: 40 requestor lines
 - for pxa27x: 75 requestor lines
 - for pxa3xx: 100 requestor lines

This information will be used to activate the DMA flow control or not.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
This commit is contained in:
Robert Jarzmik 2016-02-15 21:57:47 +01:00
parent c283e41ef3
commit 72b195cb71
7 changed files with 8 additions and 5 deletions
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1
arch/arm/boot/dts/pxa27x.dtsi
View File

@ -13,6 +13,7 @@ pdma: dma-controller@40000000 {
interrupts = <25>;
#dma-channels = <32>;
#dma-cells = <2>;
#dma-requests = <75>;
status = "okay";
};

1
arch/arm/boot/dts/pxa3xx.dtsi
View File

@ -12,6 +12,7 @@ pdma: dma-controller@40000000 {
interrupts = <25>;
#dma-channels = <32>;
#dma-cells = <2>;
#dma-requests = <100>;
status = "okay";
};

3
arch/arm/mach-pxa/devices.c
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@ -1203,6 +1203,7 @@ void __init pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info)
static struct mmp_dma_platdata pxa_dma_pdata = {
.dma_channels = 0,
.nb_requestors = 0,
};
static struct resource pxa_dma_resource[] = {
@ -1231,7 +1232,7 @@ static struct platform_device pxa2xx_pxa_dma = {
.resource = pxa_dma_resource,
};
void __init pxa2xx_set_dmac_info(int nb_channels)
void __init pxa2xx_set_dmac_info(int nb_channels, int nb_requestors)
{
pxa_dma_pdata.dma_channels = nb_channels;
pxa_register_device(&pxa2xx_pxa_dma, &pxa_dma_pdata);

2
arch/arm/mach-pxa/pxa25x.c
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@ -206,7 +206,7 @@ static int __init pxa25x_init(void)
register_syscore_ops(&pxa_irq_syscore_ops);
register_syscore_ops(&pxa2xx_mfp_syscore_ops);
pxa2xx_set_dmac_info(16);
pxa2xx_set_dmac_info(16, 40);
pxa_register_device(&pxa25x_device_gpio, &pxa25x_gpio_info);
ret = platform_add_devices(pxa25x_devices,
ARRAY_SIZE(pxa25x_devices));

2
arch/arm/mach-pxa/pxa27x.c
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@ -311,7 +311,7 @@ static int __init pxa27x_init(void)
if (!of_have_populated_dt()) {
pxa_register_device(&pxa27x_device_gpio,
&pxa27x_gpio_info);
pxa2xx_set_dmac_info(32);
pxa2xx_set_dmac_info(32, 75);
ret = platform_add_devices(devices,
ARRAY_SIZE(devices));
}

2
arch/arm/mach-pxa/pxa3xx.c
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@ -449,7 +449,7 @@ static int __init pxa3xx_init(void)
if (of_have_populated_dt())
return 0;
pxa2xx_set_dmac_info(32);
pxa2xx_set_dmac_info(32, 100);
ret = platform_add_devices(devices, ARRAY_SIZE(devices));
if (ret)
return ret;

2
arch/arm/plat-pxa/include/plat/dma.h
View File

@ -95,6 +95,6 @@ static inline int pxad_toggle_reserved_channel(int legacy_channel)
}
#endif
extern void __init pxa2xx_set_dmac_info(int nb_channels);
extern void __init pxa2xx_set_dmac_info(int nb_channels, int nb_requestors);
#endif /* __PLAT_DMA_H */