From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1e0JrA-0006fL-HP for barebox@lists.infradead.org; Fri, 06 Oct 2017 04:03:28 +0000 Date: Fri, 6 Oct 2017 06:03:02 +0200 From: Sascha Hauer Message-ID: <20171006040302.u3hc3hoerw2dszss@pengutronix.de> References: <20170929221245.8653-1-linux@rempel-privat.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20170929221245.8653-1-linux@rempel-privat.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH v1 1/2] clk: add ar9344 clock driver To: Oleksij Rempel Cc: barebox@lists.infradead.org On Sat, Sep 30, 2017 at 12:12:44AM +0200, Oleksij Rempel wrote: > Signed-off-by: Oleksij Rempel > --- > drivers/clk/Makefile | 3 +- > drivers/clk/clk-ar9344.c | 148 +++++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 150 insertions(+), 1 deletion(-) > create mode 100644 drivers/clk/clk-ar9344.c > Applied, thanks Sascha > diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile > index b5abe1cdf..ddd971c60 100644 > --- a/drivers/clk/Makefile > +++ b/drivers/clk/Makefile > @@ -9,6 +9,7 @@ obj-$(CONFIG_ARCH_MXS) += mxs/ > obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ > obj-$(CONFIG_ARCH_TEGRA) += tegra/ > obj-$(CONFIG_CLK_SOCFPGA) += socfpga/ > -obj-$(CONFIG_MACH_MIPS_ATH79) += clk-ar933x.o > +obj-$(CONFIG_SOC_QCA_AR9331) += clk-ar933x.o > +obj-$(CONFIG_SOC_QCA_AR9344) += clk-ar9344.o > obj-$(CONFIG_ARCH_IMX) += imx/ > obj-$(CONFIG_COMMON_CLK_AT91) += at91/ > diff --git a/drivers/clk/clk-ar9344.c b/drivers/clk/clk-ar9344.c > new file mode 100644 > index 000000000..c3c49fb10 > --- /dev/null > +++ b/drivers/clk/clk-ar9344.c > @@ -0,0 +1,148 @@ > +/* > + * Copyright (C) 2017 Oleksij Rempel > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > + * more details. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > + > +#define AR9344_CPU_PLL_CONFIG 0x00 > +#define AR9344_DDR_PLL_CONFIG 0x04 > +#define AR9344_OUTDIV_M 0x3 > +#define AR9344_OUTDIV_S 19 > +#define AR9344_REFDIV_M 0x1f > +#define AR9344_REFDIV_S 12 > +#define AR9344_NINT_M 0x3f > +#define AR9344_NINT_S 6 > +#define AR9344_NFRAC_M 0x3f > +#define AR9344_NFRAC_S 0 > + > + > +#define AR9344_CPU_DDR_CLOCK_CONTROL 0x08 > +#define AR9344_CPU_FROM_CPUPLL BIT(20) > +#define AR9344_CPU_PLL_BYPASS BIT(2) > +#define AR9344_CPU_POST_DIV_M 0x1f > +#define AR9344_CPU_POST_DIV_S 5 > + > +static struct clk *clks[ATH79_CLK_END]; > +static struct clk_onecell_data clk_data; > + > +struct clk_ar9344 { > + struct clk clk; > + void __iomem *base; > + u32 div_shift; > + u32 div_mask; > + const char *parent; > +}; > + > +static unsigned long clk_ar9344_recalc_rate(struct clk *clk, > + unsigned long parent_rate) > +{ > + struct clk_ar9344 *f = container_of(clk, struct clk_ar9344, clk); > + int outdiv, refdiv, nint, nfrac; > + int cpu_post_div; > + u32 clock_ctrl; > + u32 val; > + > + clock_ctrl = __raw_readl(f->base + AR9344_CPU_DDR_CLOCK_CONTROL); > + cpu_post_div = ((clock_ctrl >> AR9344_CPU_POST_DIV_S) > + & AR9344_CPU_POST_DIV_M) + 1; > + if (clock_ctrl & AR9344_CPU_PLL_BYPASS) { > + return parent_rate; > + } else if (clock_ctrl & AR9344_CPU_FROM_CPUPLL) { > + val = __raw_readl(f->base + AR9344_CPU_PLL_CONFIG); > + } else { > + val = __raw_readl(f->base + AR9344_DDR_PLL_CONFIG); > + } > + > + outdiv = (val >> AR9344_OUTDIV_S) & AR9344_OUTDIV_M; > + refdiv = (val >> AR9344_REFDIV_S) & AR9344_REFDIV_M; > + nint = (val >> AR9344_NINT_S) & AR9344_NINT_M; > + nfrac = (val >> AR9344_NFRAC_S) & AR9344_NFRAC_M; > + > + return (parent_rate * (nint + (nfrac >> 9))) / (refdiv * (1 << outdiv)); > +} > + > +struct clk_ops clk_ar9344_ops = { > + .recalc_rate = clk_ar9344_recalc_rate, > +}; > + > +static struct clk *clk_ar9344(const char *name, const char *parent, > + void __iomem *base) > +{ > + struct clk_ar9344 *f = xzalloc(sizeof(*f)); > + > + f->parent = parent; > + f->base = base; > + f->div_shift = 0; > + f->div_mask = 0; > + > + f->clk.ops = &clk_ar9344_ops; > + f->clk.name = name; > + f->clk.parent_names = &f->parent; > + f->clk.num_parents = 1; > + > + clk_register(&f->clk); > + > + return &f->clk; > +} > + > +static void ar9344_pll_init(void __iomem *base) > +{ > + clks[ATH79_CLK_CPU] = clk_ar9344("cpu", "ref", base); > +} > + > +static int ar9344_clk_probe(struct device_d *dev) > +{ > + struct resource *iores; > + void __iomem *base; > + > + iores = dev_request_mem_resource(dev, 0); > + if (IS_ERR(iores)) > + return PTR_ERR(iores); > + base = IOMEM(iores->start); > + > + ar9344_pll_init(base); > + > + clk_data.clks = clks; > + clk_data.clk_num = ARRAY_SIZE(clks); > + of_clk_add_provider(dev->device_node, of_clk_src_onecell_get, > + &clk_data); > + > + return 0; > +} > + > +static __maybe_unused struct of_device_id ar9344_clk_dt_ids[] = { > + { > + .compatible = "qca,ar9344-pll", > + }, { > + /* sentinel */ > + } > +}; > + > +static struct driver_d ar9344_clk_driver = { > + .probe = ar9344_clk_probe, > + .name = "ar9344_clk", > + .of_compatible = DRV_OF_COMPAT(ar9344_clk_dt_ids), > +}; > + > +static int ar9344_clk_init(void) > +{ > + return platform_driver_register(&ar9344_clk_driver); > +} > +postcore_initcall(ar9344_clk_init); > -- > 2.11.0 > > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox