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Message-ID: <86A0E76937111F4C92FABEC0A209885104733901@az33exm21>
Date: Mon, 19 Apr 2010 07:48:17 -0700
From: "Nguyen Dinh-R00091" <R00091@...escale.com>
To: "Amit Kucheria" <amit.kucheria@...onical.com>
Cc: <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>, <linux@....linux.org.uk>,
<s.hauer@...gutronix.de>, <valentin.longchamp@...l.ch>,
<daniel@...aq.de>, <grant.likely@...retlab.ca>,
<bryan.wu@...onical.com>,
"Herring Robert-RA7055" <RA7055@...escale.com>,
"Li Jun-R65092" <R65092@...escale.com>,
"Zhang Lily-R58066" <R58066@...escale.com>
Subject: RE: [PATCHv4 2.6.34-rc4 2/7] mx5: Add USB device definitions for Freescale MX51 Babbage HW
-----Original Message-----
From: Amit Kucheria [mailto:amit.kucheria@...onical.com]
Sent: Sunday, April 18, 2010 7:33 PM
To: Nguyen Dinh-R00091
Cc: linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
linux@....linux.org.uk; s.hauer@...gutronix.de;
valentin.longchamp@...l.ch; daniel@...aq.de; grant.likely@...retlab.ca;
bryan.wu@...onical.com; Herring Robert-RA7055; Li Jun-R65092; Zhang
Lily-R58066
Subject: Re: [PATCHv4 2.6.34-rc4 2/7] mx5: Add USB device definitions
for Freescale MX51 Babbage HW
On 10 Apr 16, Dinh.Nguyen@...escale.com wrote:
> From: Dinh Nguyen <Dinh.Nguyen@...escale.com>
>
> This patch is part of enabling USB for Freescale MX51 Babbage HW. This
> patch adds device structures for USB Host1 and OTG port, and adds
> clocking information for USB HW.
>
> This patch applies to 2.6.34-rc4.
>
> Signed-off-by: Dinh Nguyen <Dinh.Nguyen@...escale.com>
> ---
> arch/arm/mach-mx5/clock-mx51.c | 8 ++++++
> arch/arm/mach-mx5/devices.c | 49
++++++++++++++++++++++++++++++++++++++++
> arch/arm/mach-mx5/devices.h | 2 +
> 3 files changed, 59 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-mx5/clock-mx51.c
> b/arch/arm/mach-mx5/clock-mx51.c index 1ee6ce4..1fe40e1 100644
> --- a/arch/arm/mach-mx5/clock-mx51.c
> +++ b/arch/arm/mach-mx5/clock-mx51.c
> @@ -762,6 +762,10 @@ DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2,
> MXC_CCM_CCGRx_CG9_OFFSET, DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2,
MXC_CCM_CCGRx_CG10_OFFSET,
> NULL, NULL, &ipg_clk, NULL);
>
> +/* USB */
> +DEFINE_CLOCK(usboh3_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG14_OFFSET,
> + NULL, NULL, &pll3_sw_clk, NULL);
> +
> /* FEC */
> DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
> NULL, NULL, &ipg_clk, NULL);
> @@ -779,6 +783,10 @@ static struct clk_lookup lookups[] = {
> _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
> _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
> _REGISTER_CLOCK("fec.0", NULL, fec_clk)
> + _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk)
> + _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", ahb_clk)
> + _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)
> + _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", ahb_clk)
> };
>
> static void clk_tree_init(void)
> diff --git a/arch/arm/mach-mx5/devices.c b/arch/arm/mach-mx5/devices.c
> index 5070ae1..4b456d5 100644
This part of the patch doesn't apply anymore. Please fix. Also, run
scripts/checkpatch.pl on the series to catch some standard whitespace
errors (like no new line at the end of this file)
[Dinh] I'm not sure I know what you mean Amit? The mxc-ehci makes calls
in the driver probe function to get the usb and usb_ahb clock. I have
ran checkpatch.pl on all of the patches in Bryan Wu made that comment.
There are only warnings for 80 characters on all of the patches.
> --- a/arch/arm/mach-mx5/devices.c
> +++ b/arch/arm/mach-mx5/devices.c
> @@ -12,6 +12,7 @@
>
> #include <linux/platform_device.h>
> #include <linux/gpio.h>
> +#include <linux/dma-mapping.h>
> #include <mach/hardware.h>
> #include <mach/imx-uart.h>
> #include <mach/irqs.h>
> @@ -92,6 +93,54 @@ struct platform_device mxc_fec_device = {
> .resource = mxc_fec_resources,
> };
>
> +static u64 usb_dma_mask = DMA_BIT_MASK(32);
> +
> +static struct resource usbotg_resources[] = {
> + {
> + .start = MX51_OTG_BASE_ADDR,
> + .end = MX51_OTG_BASE_ADDR + 0x1ff,
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = MX51_MXC_INT_USB_OTG,
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> +struct platform_device mxc_usbdr_host_device = {
> + .name = "mxc-ehci",
> + .id = 0,
> + .num_resources = ARRAY_SIZE(usbotg_resources),
> + .resource = usbotg_resources,
> + .dev = {
> + .dma_mask = &usb_dma_mask,
> + .coherent_dma_mask = DMA_BIT_MASK(32),
> + },
> +};
> +
> +static struct resource usbh1_resources[] = {
> + {
> + .start = MX51_OTG_BASE_ADDR + 0x200,
> + .end = MX51_OTG_BASE_ADDR + 0x200 + 0x1ff,
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = MX51_MXC_INT_USB_H1,
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> +struct platform_device mxc_usbh1_device = {
> + .name = "mxc-ehci",
> + .id = 1,
> + .num_resources = ARRAY_SIZE(usbh1_resources),
> + .resource = usbh1_resources,
> + .dev = {
> + .dma_mask = &usb_dma_mask,
> + .coherent_dma_mask = DMA_BIT_MASK(32),
> + },
> +};
> +
> static struct mxc_gpio_port mxc_gpio_ports[] = {
> {
> .chip.label = "gpio-0",
> diff --git a/arch/arm/mach-mx5/devices.h b/arch/arm/mach-mx5/devices.h
> index f339ab8..6497764 100644
> --- a/arch/arm/mach-mx5/devices.h
> +++ b/arch/arm/mach-mx5/devices.h
> @@ -2,3 +2,5 @@ extern struct platform_device mxc_uart_device0;
> extern struct platform_device mxc_uart_device1; extern struct
> platform_device mxc_uart_device2; extern struct platform_device
> mxc_fec_device;
> +extern struct platform_device mxc_usbdr_host_device; extern struct
> +platform_device mxc_usbh1_device;
> \ No newline at end of file
> --
> 1.6.0.4
>
--
----------------------------------------------------------------------
Amit Kucheria, Kernel Engineer || amit.kucheria@...onical.com
----------------------------------------------------------------------
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