[PATCH v2] ARM: Exynos5250: Enabling dwc3-exynos driver
Vivek Gautam
gautamvivek1987 at gmail.com
Thu Dec 6 05:33:06 EST 2012
Hi Grant,
On Thu, Dec 6, 2012 at 3:45 PM, Grant Likely <grant.likely at secretlab.ca> wrote:
> On Thu, 08 Nov 2012 14:02:13 +0530, Vivek Gautam <gautam.vivek at samsung.com> wrote:
>> Adding DWC3 device tree node for Exynos5250 along with the
>> device address and clock support needed for the controller.
>>
>> Signed-off-by: Vivek Gautam <gautam.vivek at samsung.com>
>> ---
>> .../devicetree/bindings/usb/exynos-usb.txt | 14 +++++++++++
>> arch/arm/boot/dts/exynos5250.dtsi | 6 +++++
>> arch/arm/mach-exynos/Kconfig | 1 +
>> arch/arm/mach-exynos/clock-exynos5.c | 24 ++++++++++++++++++++
>> arch/arm/mach-exynos/include/mach/map.h | 1 +
>> arch/arm/mach-exynos/mach-exynos5-dt.c | 2 +
>> 6 files changed, 48 insertions(+), 0 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/usb/exynos-usb.txt b/Documentation/devicetree/bindings/usb/exynos-usb.txt
>> index 5ff3def1..a7e3eaa 100644
>> --- a/Documentation/devicetree/bindings/usb/exynos-usb.txt
>> +++ b/Documentation/devicetree/bindings/usb/exynos-usb.txt
>> @@ -38,3 +38,17 @@ Example:
>> reg = <0x12120000 0x100>;
>> interrupts = <0 71 0>;
>> };
>> +
>> +DWC3
>> +Required properties:
>> + - compatible: should be "samsung,exynos-dwc3" for USB 3.0 DWC3 controller.
>
> Nit: Please use a specific chip in compatible strings. ie.
> "samsung,exynos5250-dwc3". Newer parts using the same core can claim
> compatibility by including the older string in the compatible list.
>
The compatible string "samsung,exynos-dwc3" is added in accordance
with the driver dt changes
present at drivers "drivers/usb/dwc3/dwc3-exynos.c". Should i be
amending the driver side also likewise ?
>> + - reg: physical base address of the controller and length of memory mapped
>> + region.
>> + - interrupts: interrupt number to the cpu.
>> +
>> +Example:
>> + usb at 12000000 {
>> + compatible = "samsung,exynos-dwc3";
>> + reg = <0x12000000 0x10000>;
>> + interrupts = <0 72 0>;
>> + };
>> diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
>> index f18abe0..d349636 100644
>> --- a/arch/arm/boot/dts/exynos5250.dtsi
>> +++ b/arch/arm/boot/dts/exynos5250.dtsi
>> @@ -68,6 +68,12 @@
>> interrupts = <0 96 0>;
>> };
>>
>> + usb at 12000000 {
>> + compatible = "samsung,exynos-dwc3";
>> + reg = <0x12000000 0x10000>;
>> + interrupts = <0 72 0>;
>> + };
>> +
>> rtc {
>> compatible = "samsung,s3c6410-rtc";
>> reg = <0x101E0000 0x100>;
>> diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
>> index bb3b09a..588814a 100644
>> --- a/arch/arm/mach-exynos/Kconfig
>> +++ b/arch/arm/mach-exynos/Kconfig
>> @@ -422,6 +422,7 @@ config MACH_EXYNOS5_DT
>> select ARM_AMBA
>> select SOC_EXYNOS5250
>> select USE_OF
>> + select USB_ARCH_HAS_XHCI
>> help
>> Machine support for Samsung EXYNOS5 machine with device tree enabled.
>> Select this if a fdt blob is available for the EXYNOS5 SoC based board.
>> diff --git a/arch/arm/mach-exynos/clock-exynos5.c b/arch/arm/mach-exynos/clock-exynos5.c
>> index a88e0d9..ee094ee 100644
>> --- a/arch/arm/mach-exynos/clock-exynos5.c
>> +++ b/arch/arm/mach-exynos/clock-exynos5.c
>> @@ -740,6 +740,11 @@ static struct clk exynos5_init_clocks_off[] = {
>> .enable = exynos5_clk_ip_fsys_ctrl ,
>> .ctrlbit = (1 << 18),
>> }, {
>> + .name = "usbdrd30",
>> + .parent = &exynos5_clk_aclk_200.clk,
>> + .enable = exynos5_clk_ip_fsys_ctrl,
>> + .ctrlbit = (1 << 19),
>> + }, {
>> .name = "usbotg",
>> .enable = exynos5_clk_ip_fsys_ctrl,
>> .ctrlbit = (1 << 7),
>> @@ -1004,6 +1009,16 @@ struct clksrc_sources exynos5_clkset_group = {
>> .nr_sources = ARRAY_SIZE(exynos5_clkset_group_list),
>> };
>>
>> +struct clk *exynos5_clkset_usbdrd30_list[] = {
>> + [0] = &exynos5_clk_mout_mpll.clk,
>> + [1] = &exynos5_clk_mout_cpll.clk,
>> +};
>> +
>> +struct clksrc_sources exynos5_clkset_usbdrd30 = {
>> + .sources = exynos5_clkset_usbdrd30_list,
>> + .nr_sources = ARRAY_SIZE(exynos5_clkset_usbdrd30_list),
>> +};
>> +
>> /* Possible clock sources for aclk_266_gscl_sub Mux */
>> static struct clk *clk_src_gscl_266_list[] = {
>> [0] = &clk_ext_xtal_mux,
>> @@ -1288,6 +1303,15 @@ static struct clksrc_clk exynos5_clksrcs[] = {
>> .parent = &exynos5_clk_mout_cpll.clk,
>> },
>> .reg_div = { .reg = EXYNOS5_CLKDIV_GEN, .shift = 4, .size = 3 },
>> + }, {
>> + .clk = {
>> + .name = "sclk_usbdrd30",
>> + .enable = exynos5_clksrc_mask_fsys_ctrl,
>> + .ctrlbit = (1 << 28),
>> + },
>> + .sources = &exynos5_clkset_usbdrd30,
>> + .reg_src = { .reg = EXYNOS5_CLKSRC_FSYS, .shift = 28, .size = 1 },
>> + .reg_div = { .reg = EXYNOS5_CLKDIV_FSYS0, .shift = 24, .size = 4 },
>> },
>> };
>>
>> diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
>> index 471ffaf..064ca1c 100644
>> --- a/arch/arm/mach-exynos/include/mach/map.h
>> +++ b/arch/arm/mach-exynos/include/mach/map.h
>> @@ -197,6 +197,7 @@
>> #define EXYNOS4_PA_EHCI 0x12580000
>> #define EXYNOS4_PA_OHCI 0x12590000
>> #define EXYNOS4_PA_HSPHY 0x125B0000
>> +#define EXYNOS5_PA_DRD 0x12000000
>> #define EXYNOS5_PA_EHCI 0x12110000
>> #define EXYNOS5_PA_OHCI 0x12120000
>> #define EXYNOS4_PA_MFC 0x13400000
>> diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
>> index c03f3dd..3032222 100644
>> --- a/arch/arm/mach-exynos/mach-exynos5-dt.c
>> +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
>> @@ -90,6 +90,8 @@ static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
>> "s5p-ehci", NULL),
>> OF_DEV_AUXDATA("samsung,exynos-ohci", EXYNOS5_PA_OHCI,
>> "exynos-ohci", NULL),
>> + OF_DEV_AUXDATA("samsung,exynos-dwc3", EXYNOS5_PA_DRD,
>> + "exynos-dwc3", NULL),
>> {},
>> };
>>
>> --
>> 1.7.6.5
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
> --
> Grant Likely, B.Sc, P.Eng.
> Secret Lab Technologies, Ltd.
> _______________________________________________
> devicetree-discuss mailing list
> devicetree-discuss at lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/devicetree-discuss
--
Thanks & Regards
Vivek
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