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MIPS: JZ4740: Probe OHCI platform device via DT 

The DT fragment will select the ohci-platform driver, since that can
handle the JZ4740 OHCI just fine. While I don't have a JZ4740-based
board with anything connected to the USB host controller, I did test
the generic OHCI driver successfully on a JZ4770-based board.

The device is disabled by default; boards that want to use it can
override the "status" property. The mass-production Qi LB60 boards
don't use the USB host controller.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13104/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Maarten ter Huurne 2016-04-18 20:58:52 +02:00 committed by Ralf Baechle
parent 46d6ccdbf3
commit 9d1e7875fa
3 changed files with 14 additions and 26 deletions
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14
arch/mips/boot/dts/ingenic/jz4740.dtsi
View File

@ -65,4 +65,18 @@
clocks = <&ext>, <&cgu JZ4740_CLK_UART1>;
clock-names = "baud", "module";
};
uhc: uhc@13030000 {
compatible = "ingenic,jz4740-ohci", "generic-ohci";
reg = <0x13030000 0x1000>;
clocks = <&cgu JZ4740_CLK_UHC>;
assigned-clocks = <&cgu JZ4740_CLK_UHC>;
assigned-clock-rates = <48000000>;
interrupt-parent = <&intc>;
interrupts = <3>;
status = "disabled";
};
};

1
arch/mips/include/asm/mach-jz4740/platform.h
View File

@ -19,7 +19,6 @@
#include <linux/platform_device.h>
extern struct platform_device jz4740_usb_ohci_device;
extern struct platform_device jz4740_udc_device;
extern struct platform_device jz4740_udc_xceiv_device;
extern struct platform_device jz4740_mmc_device;

25
arch/mips/jz4740/platform.c
View File

@ -32,31 +32,6 @@
#include "clock.h"
/* OHCI controller */
static struct resource jz4740_usb_ohci_resources[] = {
{
.start = JZ4740_UHC_BASE_ADDR,
.end = JZ4740_UHC_BASE_ADDR + 0x1000 - 1,
.flags = IORESOURCE_MEM,
},
{
.start = JZ4740_IRQ_UHC,
.end = JZ4740_IRQ_UHC,
.flags = IORESOURCE_IRQ,
},
};
struct platform_device jz4740_usb_ohci_device = {
.name = "jz4740-ohci",
.id = -1,
.dev = {
.dma_mask = &jz4740_usb_ohci_device.dev.coherent_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
.num_resources = ARRAY_SIZE(jz4740_usb_ohci_resources),
.resource = jz4740_usb_ohci_resources,
};
/* USB Device Controller */
struct platform_device jz4740_udc_xceiv_device = {
.name = "usb_phy_generic",