linux-kernel - Re: [PATCH 03/11] clk: bcm: Add clocks for Stingray SOC

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Date:   Thu, 18 May 2017 18:37:09 -0700
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Anup Patel <anup.patel@...adcom.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Oza Pawandeep <oza@...adcom.com>,
        Srinath Mannam <srinath.mannam@...adcom.com>,
        Pramod Kumar <pramod.kumar@...adcom.com>,
        Sandeep Tripathy <sandeep.tripathy@...adcom.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH 03/11] clk: bcm: Add clocks for Stingray SOC

On 05/06, Anup Patel wrote:
> From: Sandeep Tripathy <sandeep.tripathy@...adcom.com>
> 
> This patch adds support for Stingray clocks in iproc
> ccf. The Stingray SOC has various plls based on iproc
> pll architecture.
> 

Does it have anything besides PLLs?

> +CLK_OF_DECLARE(sr_genpll0_clk, "brcm,sr-genpll0",
> +				sr_genpll0_clk_init);
> +
> +static const struct iproc_pll_ctrl genpll3 = {
> +	.flags = IPROC_CLK_AON | IPROC_CLK_PLL_HAS_NDIV_FRAC |
> +		IPROC_CLK_PLL_NEEDS_SW_CFG,
> +	.aon = AON_VAL(0x0, 1, 19, 18),
> +	.reset = RESET_VAL(0x0, 12, 11),
> +	.dig_filter = DF_VAL(0x0, 4, 3, 0, 4, 7, 3),
> +	.sw_ctrl = SW_CTRL_VAL(0x10, 31),
> +	.ndiv_int = REG_VAL(0x10, 20, 10),
> +	.ndiv_frac = REG_VAL(0x10, 0, 20),
> +	.pdiv = REG_VAL(0x14, 0, 4),
> +	.status = REG_VAL(0x30, 12, 1),
> +};
> +
> +static const struct iproc_clk_ctrl genpll3_clk[] = {
> +	[BCM_SR_GENPLL3_HSLS_CLK] = {
> +		.channel = BCM_SR_GENPLL3_HSLS_CLK,
> +		.flags = IPROC_CLK_AON,
> +		.enable = ENABLE_VAL(0x4, 6, 0, 12),
> +		.mdiv = REG_VAL(0x18, 0, 9),
> +	},
> +	[BCM_SR_GENPLL3_SDIO_CLK] = {
> +		.channel = BCM_SR_GENPLL3_SDIO_CLK,
> +		.flags = IPROC_CLK_AON,
> +		.enable = ENABLE_VAL(0x4, 7, 1, 13),
> +		.mdiv = REG_VAL(0x18, 10, 9),
> +	},
> +};
> +
> +static void __init sr_genpll3_clk_init(struct device_node *node)
> +{
> +	iproc_pll_clk_setup(node, &genpll3, NULL, 0, genpll3_clk,
> +				ARRAY_SIZE(genpll3_clk));
> +}
> +CLK_OF_DECLARE(sr_genpll3_clk, "brcm,sr-genpll3",
> +			sr_genpll3_clk_init);

Can you make this a platform driver instead? Are all these clks
really used for getting the interrupt and timers running?

> +
> +static const struct iproc_pll_ctrl genpll4 = {
> +	.flags = IPROC_CLK_AON | IPROC_CLK_PLL_HAS_NDIV_FRAC |
> +		IPROC_CLK_PLL_NEEDS_SW_CFG,
> +	.aon = AON_VAL(0x0, 1, 25, 24),
> +	.reset = RESET_VAL(0x0, 12, 11),
> +	.dig_filter = DF_VAL(0x0, 4, 3, 0, 4, 7, 3),
> +	.sw_ctrl = SW_CTRL_VAL(0x10, 31),
> +	.ndiv_int = REG_VAL(0x10, 20, 10),
> +	.ndiv_frac = REG_VAL(0x10, 0, 20),
> +	.pdiv = REG_VAL(0x14, 0, 4),
> +	.status = REG_VAL(0x30, 12, 1),
> +};
> +
> +static const struct iproc_clk_ctrl genpll4_clk[] = {
> +	[BCM_SR_GENPLL4_CCN_CLK] = {
> +		.channel = BCM_SR_GENPLL4_CCN_CLK,
> +		.flags = IPROC_CLK_AON,
> +		.enable = ENABLE_VAL(0x4, 6, 0, 12),
> +		.mdiv = REG_VAL(0x18, 0, 9),
> +	},
> +};
> +

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