linux-kernel - Re: [PATCH 2/6] ARM: imx: clk-vf610: add USBPHY clocks

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Message-ID: <20140722023205.GS8537@dragon>
Date:	Tue, 22 Jul 2014 10:32:06 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Stefan Agner <stefan@...er.ch>, Jingchang Lu <b35083@...escale.com>
CC:	<peter.chen@...escale.com>, <s.hauer@...gutronix.de>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/6] ARM: imx: clk-vf610: add USBPHY clocks

On Fri, Jul 18, 2014 at 07:01:38PM +0200, Stefan Agner wrote:
> This commit adds PLL7 which is required for USBPHY1. It also adds
> the USB PHY and USB Controller clocks and the gates to enable them.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>

Jingchang,

Does the patch look good to you?

Shawn

> ---
> All the main PLLs are currently turned on by boot ROM or boot loader, within
> the kernel we only set the fixed factor. Altough, the function imx_clk_pllv3
> would provide enabling and rate calculation support.
> Because PLL7 is _not_ enabled at boot up, we need enable support. With this,
> we make use of the imx_clk_pllv3 function the first time in clk-vf610. In
> order to be aligned, would it make sense to use the function for all the
> main PLLs? I think support for all types of PLL available in Vybrid is
> already there, altough this need to be verified first.
> 
>  arch/arm/mach-imx/clk-vf610.c           | 12 ++++++++++--
>  include/dt-bindings/clock/vf610-clock.h |  5 ++++-
>  2 files changed, 14 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/mach-imx/clk-vf610.c b/arch/arm/mach-imx/clk-vf610.c
> index 22dc3ee..159c5c4 100644
> --- a/arch/arm/mach-imx/clk-vf610.c
> +++ b/arch/arm/mach-imx/clk-vf610.c
> @@ -58,6 +58,8 @@
>  #define PFD_PLL1_BASE		(anatop_base + 0x2b0)
>  #define PFD_PLL2_BASE		(anatop_base + 0x100)
>  #define PFD_PLL3_BASE		(anatop_base + 0xf0)
> +#define PLL3_CTRL		(anatop_base + 0x10)
> +#define PLL7_CTRL		(anatop_base + 0x20)
>  
>  static void __iomem *anatop_base;
>  static void __iomem *ccm_base;
> @@ -148,6 +150,9 @@ static void __init vf610_clocks_init(struct device_node *ccm_node)
>  	clk[VF610_CLK_PLL5_MAIN] = imx_clk_fixed_factor("pll5_main", "fast_clk_sel", 125, 6);
>  	/* pll6: default 960Mhz */
>  	clk[VF610_CLK_PLL6_MAIN] = imx_clk_fixed_factor("pll6_main", "fast_clk_sel", 40, 1);
> +	/* pll7: USB1 PLL at 480MHz */
> +	clk[VF610_CLK_PLL7_MAIN] = imx_clk_pllv3(IMX_PLLV3_USB,	"pll7_main", "fast_clk_sel", PLL7_CTRL, 0x2);
> +
>  	clk[VF610_CLK_PLL1_PFD_SEL] = imx_clk_mux("pll1_pfd_sel", CCM_CCSR, 16, 3, pll1_sels, 5);
>  	clk[VF610_CLK_PLL2_PFD_SEL] = imx_clk_mux("pll2_pfd_sel", CCM_CCSR, 19, 3, pll2_sels, 5);
>  	clk[VF610_CLK_SYS_SEL] = imx_clk_mux("sys_sel", CCM_CCSR, 0, 3, sys_sels, ARRAY_SIZE(sys_sels));
> @@ -160,8 +165,11 @@ static void __init vf610_clocks_init(struct device_node *ccm_node)
>  	clk[VF610_CLK_PLL4_MAIN_DIV] = clk_register_divider_table(NULL, "pll4_main_div", "pll4_main", 0, CCM_CACRR, 6, 3, 0, pll4_main_div_table, &imx_ccm_lock);
>  	clk[VF610_CLK_PLL6_MAIN_DIV] = imx_clk_divider("pll6_main_div", "pll6_main", CCM_CACRR, 21, 1);
>  
> -	clk[VF610_CLK_USBC0] = imx_clk_gate2("usbc0", "pll3_main", CCM_CCGR1, CCM_CCGRx_CGn(4));
> -	clk[VF610_CLK_USBC1] = imx_clk_gate2("usbc1", "pll3_main", CCM_CCGR7, CCM_CCGRx_CGn(4));
> +	clk[VF610_CLK_USBPHY0] = imx_clk_gate("usbphy0", "pll3_main", PLL3_CTRL, 6);
> +	clk[VF610_CLK_USBPHY1] = imx_clk_gate("usbphy1", "pll7_main", PLL7_CTRL, 6);
> +
> +	clk[VF610_CLK_USBC0] = imx_clk_gate2("usbc0", "ipg_bus", CCM_CCGR1, CCM_CCGRx_CGn(4));
> +	clk[VF610_CLK_USBC1] = imx_clk_gate2("usbc1", "ipg_bus", CCM_CCGR7, CCM_CCGRx_CGn(4));
>  
>  	clk[VF610_CLK_QSPI0_SEL] = imx_clk_mux("qspi0_sel", CCM_CSCMR1, 22, 2, qspi_sels, 4);
>  	clk[VF610_CLK_QSPI0_EN] = imx_clk_gate("qspi0_en", "qspi0_sel", CCM_CSCDR3, 4);
> diff --git a/include/dt-bindings/clock/vf610-clock.h b/include/dt-bindings/clock/vf610-clock.h
> index a916029..6593757 100644
> --- a/include/dt-bindings/clock/vf610-clock.h
> +++ b/include/dt-bindings/clock/vf610-clock.h
> @@ -164,6 +164,9 @@
>  #define VF610_CLK_DMAMUX1		151
>  #define VF610_CLK_DMAMUX2		152
>  #define VF610_CLK_DMAMUX3		153
> -#define VF610_CLK_END			154
> +#define VF610_CLK_PLL7_MAIN		154
> +#define VF610_CLK_USBPHY0		155
> +#define VF610_CLK_USBPHY1		156
> +#define VF610_CLK_END			157
>  
>  #endif /* __DT_BINDINGS_CLOCK_VF610_H */
> -- 
> 2.0.1
> 
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