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Message-ID: <514B1407.9010101@ti.com>
Date: Thu, 21 Mar 2013 16:07:03 +0200
From: Roger Quadros <rogerq@...com>
To: Roger Quadros <rogerq@...com>
CC: <tony@...mide.com>, <b-cousson@...com>, <linux@....linux.org.uk>,
<rnayak@...com>, <balbi@...com>, <linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-usb@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
<linux-kernel@...r.kernel.org>, Paul Walmsley <paul@...an.com>,
"Menon, Nishanth" <nm@...com>
Subject: Re: [RFC][PATCH 1/2] ARM: OMAP4: clock: Add device tree support for
AUXCLKs
+Paul & Nishant
On 03/19/2013 04:26 PM, Roger Quadros wrote:
> Register a device tree clock provider for AUX clocks
> on the OMAP4 SoC. Also provide the binding information.
>
> Signed-off-by: Roger Quadros <rogerq@...com>
> ---
> .../devicetree/bindings/clock/omap4-clock.txt | 32 ++++++++++++++++++
> arch/arm/boot/dts/omap4.dtsi | 5 +++
> arch/arm/mach-omap2/board-generic.c | 2 +-
> arch/arm/mach-omap2/cclock44xx_data.c | 35 ++++++++++++++++++++
> arch/arm/mach-omap2/clock44xx.h | 1 +
> arch/arm/mach-omap2/common.h | 9 +++++
> arch/arm/mach-omap2/io.c | 6 +++
> 7 files changed, 89 insertions(+), 1 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/clock/omap4-clock.txt
>
> diff --git a/Documentation/devicetree/bindings/clock/omap4-clock.txt b/Documentation/devicetree/bindings/clock/omap4-clock.txt
> new file mode 100644
> index 0000000..9d5448b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/omap4-clock.txt
> @@ -0,0 +1,32 @@
> +* Clock bindings for Texas Instruments OMAP4 SCRM clocks
> +
> +Required properties:
> +- compatible: Should be "ti,omap4-scrm"
> +- #clock-cells: Should be <1>
> +
> +The clock consumer should specify the desired clock by having the clock
> +ID in its "clocks" phandle cell. The following is a full list of SCRM
> +clocks and IDs.
> +
> + Clock ID
> + ------------------
> + auxclk0_ck 0
> + auxclk1_ck 1
> + auxclk1_ck 1
> + auxclk1_ck 1
> + auxclk1_ck 1
> +
> +Example:
> +
> +aux_clks: scrmclks {
> + compatible = "ti,omap4-scrm";
> + #clock-cells = <1>;
> +};
> +
> +hsusb1_phy: hsusb1_phy {
> + compatible = "usb-nop-xceiv";
> + reset-supply = <&hsusb1_reset>;
> + clocks = <&aux_clks 3>;
> + clock-names = "main_clk";
> + clock-frequency = <19200000>;
> +};
> diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
> index b7db1a2..97de56c 100644
> --- a/arch/arm/boot/dts/omap4.dtsi
> +++ b/arch/arm/boot/dts/omap4.dtsi
> @@ -101,6 +101,11 @@
> ti,hwmods = "counter_32k";
> };
>
> + aux_clks: scrmclks {
> + compatible = "ti,omap4-scrm";
> + #clock-cells = <1>;
> + };
> +
> omap4_pmx_core: pinmux@...00040 {
> compatible = "ti,omap4-padconf", "pinctrl-single";
> reg = <0x4a100040 0x0196>;
> diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
> index 0274ff7..23f2064 100644
> --- a/arch/arm/mach-omap2/board-generic.c
> +++ b/arch/arm/mach-omap2/board-generic.c
> @@ -158,7 +158,7 @@ DT_MACHINE_START(OMAP4_DT, "Generic OMAP4 (Flattened Device Tree)")
> .init_irq = omap_gic_of_init,
> .init_machine = omap_generic_init,
> .init_late = omap4430_init_late,
> - .init_time = omap4_local_timer_init,
> + .init_time = omap4_init_time,
> .dt_compat = omap4_boards_compat,
> .restart = omap44xx_restart,
> MACHINE_END
> diff --git a/arch/arm/mach-omap2/cclock44xx_data.c b/arch/arm/mach-omap2/cclock44xx_data.c
> index 3d58f33..bfc46c1 100644
> --- a/arch/arm/mach-omap2/cclock44xx_data.c
> +++ b/arch/arm/mach-omap2/cclock44xx_data.c
> @@ -27,6 +27,7 @@
> #include <linux/clk-private.h>
> #include <linux/clkdev.h>
> #include <linux/io.h>
> +#include <linux/of.h>
>
> #include "soc.h"
> #include "iomap.h"
> @@ -1663,6 +1664,40 @@ static struct omap_clk omap44xx_clks[] = {
> CLK(NULL, "cpufreq_ck", &dpll_mpu_ck, CK_443X),
> };
>
> +static struct clk *scrm_clks[] = {
> + &auxclk0_ck,
> + &auxclk1_ck,
> + &auxclk2_ck,
> + &auxclk3_ck,
> + &auxclk4_ck,
> + &auxclk5_ck,
> +};
> +
> +static struct clk_onecell_data scrm_data;
> +
> +#ifdef CONFIG_OF
> +int __init omap4_clk_init_dt(void)
> +{
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "ti,omap4-scrm");
> + if (np) {
> + scrm_data.clks = scrm_clks;
> + scrm_data.clk_num = ARRAY_SIZE(scrm_clks);
> + of_clk_add_provider(np, of_clk_src_onecell_get, &scrm_data);
> + }
> +
> + return 0;
> +}
> +
> +#else
> +
> +int __init omap4_clk_init_dt(void)
> +{
> + return 0;
> +}
> +#endif /* CONFIG_OF */
> +
> int __init omap4xxx_clk_init(void)
> {
> u32 cpu_clkflg;
> diff --git a/arch/arm/mach-omap2/clock44xx.h b/arch/arm/mach-omap2/clock44xx.h
> index 287a46f..6395f63 100644
> --- a/arch/arm/mach-omap2/clock44xx.h
> +++ b/arch/arm/mach-omap2/clock44xx.h
> @@ -16,5 +16,6 @@
> #define OMAP4430_REGM4XEN_MULT 4
>
> int omap4xxx_clk_init(void);
> +int omap4_clk_init_dt(void);
>
> #endif
> diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
> index 0a6b9c7..1941d1c 100644
> --- a/arch/arm/mach-omap2/common.h
> +++ b/arch/arm/mach-omap2/common.h
> @@ -98,6 +98,7 @@ void am35xx_init_early(void);
> void ti81xx_init_early(void);
> void am33xx_init_early(void);
> void omap4430_init_early(void);
> +void omap4_init_time(void);
> void omap5_init_early(void);
> void omap3_init_late(void); /* Do not use this one */
> void omap4430_init_late(void);
> @@ -143,6 +144,14 @@ static inline void omap44xx_restart(char mode, const char *cmd)
> }
> #endif
>
> +#ifdef CONFIG_ARCH_OMAP4
> +void omap4_init_time(void);
> +#else
> +static inline void omap4_init_time(void)
> +{
> +}
> +#endif
> +
> /* This gets called from mach-omap2/io.c, do not call this */
> void __init omap2_set_globals_tap(u32 class, void __iomem *tap);
>
> diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
> index 2c3fdd6..c504363 100644
> --- a/arch/arm/mach-omap2/io.c
> +++ b/arch/arm/mach-omap2/io.c
> @@ -603,6 +603,12 @@ void __init omap4430_init_late(void)
> omap4_pm_init();
> omap2_clk_enable_autoidle_all();
> }
> +
> +void __init omap4_init_time(void)
> +{
> + omap4_clk_init_dt();
> + omap4_local_timer_init();
> +}
> #endif
>
> #ifdef CONFIG_SOC_OMAP5
>
--
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