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 1d4768-0005BM-Vg for barebox@lists.infradead.org; Fri, 28 Apr 2017 14:42:23 +0000 From: Steffen Trumtrar Date: Fri, 28 Apr 2017 16:41:38 +0200 Message-Id: <36c0f19dc150b3625b37ee5f0e30f6440fbfd8cc.1493390425.git-series.s.trumtrar@pengutronix.de> In-Reply-To: References: In-Reply-To: References: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 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: [PATCH v2 2/8] clk: socfpga: move driver to subdirectory To: barebox@lists.infradead.org Cc: Steffen Trumtrar Prepare for Arria10 clock driver. Signed-off-by: Steffen Trumtrar --- drivers/clk/Makefile | 2 +- drivers/clk/socfpga.c | 434 +------------------------------------ drivers/clk/socfpga/Makefile | 1 +- drivers/clk/socfpga/clk.c | 434 ++++++++++++++++++++++++++++++++++++- 4 files changed, 436 insertions(+), 435 deletions(-) delete mode 100644 drivers/clk/socfpga.c create mode 100644 drivers/clk/socfpga/Makefile create mode 100644 drivers/clk/socfpga/clk.c diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 5811d28b88ce..2a8c058d84e9 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -8,6 +8,6 @@ obj-$(CONFIG_ARCH_MVEBU) += mvebu/ obj-$(CONFIG_ARCH_MXS) += mxs/ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ -obj-$(CONFIG_CLK_SOCFPGA) += socfpga.o +obj-$(CONFIG_CLK_SOCFPGA) += socfpga/ obj-$(CONFIG_MACH_MIPS_ATH79) += clk-ar933x.o obj-$(CONFIG_ARCH_IMX) += imx/ diff --git a/drivers/clk/socfpga.c b/drivers/clk/socfpga.c deleted file mode 100644 index 6af0632cafc2..000000000000 --- a/drivers/clk/socfpga.c +++ /dev/null @@ -1,434 +0,0 @@ -/* - * Copyright (C) 2013 Sascha Hauer , Pengutronix - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that 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 - -/* Clock Manager offsets */ -#define CLKMGR_CTRL 0x0 -#define CLKMGR_BYPASS 0x4 -#define CLKMGR_L4SRC 0x70 -#define CLKMGR_PERPLL_SRC 0xAC - -/* Clock bypass bits */ -#define MAINPLL_BYPASS (1<<0) -#define SDRAMPLL_BYPASS (1<<1) -#define SDRAMPLL_SRC_BYPASS (1<<2) -#define PERPLL_BYPASS (1<<3) -#define PERPLL_SRC_BYPASS (1<<4) - -#define SOCFPGA_PLL_BG_PWRDWN 0 -#define SOCFPGA_PLL_EXT_ENA 1 -#define SOCFPGA_PLL_PWR_DOWN 2 -#define SOCFPGA_PLL_DIVF_MASK 0x0000FFF8 -#define SOCFPGA_PLL_DIVF_SHIFT 3 -#define SOCFPGA_PLL_DIVQ_MASK 0x003F0000 -#define SOCFPGA_PLL_DIVQ_SHIFT 16 -#define SOCFGPA_MAX_PARENTS 3 - -#define SOCFPGA_L4_MP_CLK "l4_mp_clk" -#define SOCFPGA_L4_SP_CLK "l4_sp_clk" -#define SOCFPGA_NAND_CLK "nand_clk" -#define SOCFPGA_NAND_X_CLK "nand_x_clk" -#define SOCFPGA_MMC_CLK "sdmmc_clk" -#define SOCFPGA_DB_CLK "gpio_db_clk" - -#define div_mask(width) ((1 << (width)) - 1) -#define streq(a, b) (strcmp((a), (b)) == 0) - -static void __iomem *clk_mgr_base_addr; - -struct clk_pll { - struct clk clk; - const char *parent; - unsigned regofs; -}; - -static unsigned long clk_pll_recalc_rate(struct clk *clk, - unsigned long parent_rate) -{ - struct clk_pll *pll = container_of(clk, struct clk_pll, clk); - unsigned long divf, divq, vco_freq, reg; - unsigned long bypass; - - reg = readl(clk_mgr_base_addr + pll->regofs); - - bypass = readl(clk_mgr_base_addr + CLKMGR_BYPASS); - if (bypass & MAINPLL_BYPASS) - return parent_rate; - - divf = (reg & SOCFPGA_PLL_DIVF_MASK) >> SOCFPGA_PLL_DIVF_SHIFT; - divq = (reg & SOCFPGA_PLL_DIVQ_MASK) >> SOCFPGA_PLL_DIVQ_SHIFT; - vco_freq = parent_rate * (divf + 1); - - return vco_freq / (1 + divq); -} - -static struct clk_ops clk_pll_ops = { - .recalc_rate = clk_pll_recalc_rate, -}; - -static struct clk *socfpga_pll_clk(struct device_node *node) -{ - struct clk_pll *pll; - int ret; - - pll = xzalloc(sizeof(*pll)); - - pll->parent = of_clk_get_parent_name(node, 0); - if (!pll->parent) - return ERR_PTR(-EINVAL); - - pll->clk.parent_names = &pll->parent; - pll->clk.num_parents = 1; - pll->clk.name = xstrdup(node->name); - pll->clk.ops = &clk_pll_ops; - - of_property_read_u32(node, "reg", &pll->regofs); - - ret = clk_register(&pll->clk); - if (ret) { - free(pll); - return ERR_PTR(ret); - } - - return &pll->clk; -} - -struct clk_periph { - struct clk clk; - const char *parent; - unsigned regofs; - unsigned int fixed_div; - void __iomem *div_reg; - unsigned int width; - unsigned int shift; -}; - -static unsigned long clk_periph_recalc_rate(struct clk *clk, - unsigned long parent_rate) -{ - struct clk_periph *periph = container_of(clk, struct clk_periph, clk); - u32 div, val; - - if (periph->fixed_div) { - div = periph->fixed_div; - } else { - if (periph->div_reg) { - val = readl(periph->div_reg) >> periph->shift; - val &= div_mask(periph->width); - parent_rate /= (val + 1); - } - div = ((readl(clk_mgr_base_addr + periph->regofs) & 0x1ff) + 1); - } - - return parent_rate / div; -} - -static struct clk_ops clk_periph_ops = { - .recalc_rate = clk_periph_recalc_rate, -}; - -static struct clk *socfpga_periph_clk(struct device_node *node) -{ - struct clk_periph *periph; - int ret; - u32 div_reg[3]; - - periph = xzalloc(sizeof(*periph)); - - periph->parent = of_clk_get_parent_name(node, 0); - if (!periph->parent) - return ERR_PTR(-EINVAL); - - periph->clk.parent_names = &periph->parent; - periph->clk.num_parents = 1; - periph->clk.name = xstrdup(node->name); - periph->clk.ops = &clk_periph_ops; - - ret = of_property_read_u32_array(node, "div-reg", div_reg, 3); - if (!ret) { - periph->div_reg = clk_mgr_base_addr + div_reg[0]; - periph->shift = div_reg[1]; - periph->width = div_reg[2]; - } else { - periph->div_reg = 0; - } - - of_property_read_u32(node, "reg", &periph->regofs); - of_property_read_u32(node, "fixed-divider", &periph->fixed_div); - - ret = clk_register(&periph->clk); - if (ret) { - free(periph); - return ERR_PTR(ret); - } - - return &periph->clk; -} - -struct clk_socfpga { - struct clk clk; - const char *parent; - void __iomem *reg; - void __iomem *div_reg; - unsigned int fixed_div; - unsigned int bit_idx; - unsigned int shift; - unsigned int width; - const char *parent_names[SOCFGPA_MAX_PARENTS]; -}; - -static int clk_socfpga_enable(struct clk *clk) -{ - struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); - u32 val; - - val = readl(cs->reg); - val |= 1 << cs->shift; - writel(val, cs->reg); - - return 0; -} - -static void clk_socfpga_disable(struct clk *clk) -{ - struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); - u32 val; - - val = readl(cs->reg); - val &= ~(1 << cs->shift); - writel(val, cs->reg); -} - -static int clk_socfpga_is_enabled(struct clk *clk) -{ - struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); - u32 val; - - val = readl(cs->reg); - - if (val & (1 << cs->shift)) - return 1; - else - return 0; -} - -static unsigned long clk_socfpga_recalc_rate(struct clk *clk, - unsigned long parent_rate) -{ - struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); - u32 div = 1, val; - - if (cs->fixed_div) { - div = cs->fixed_div; - } else if (cs->div_reg) { - val = readl(cs->div_reg) >> cs->shift; - val &= div_mask(cs->width); - if (streq(clk->name, SOCFPGA_DB_CLK)) - div = val + 1; - else - div = (1 << val); - } - - return parent_rate / div; -} - -static int clk_socfpga_get_parent(struct clk *clk) -{ - u32 perpll_src; - u32 l4_src; - - if (streq(clk->name, SOCFPGA_L4_MP_CLK)) { - l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC); - return l4_src &= 0x1; - } - if (streq(clk->name, SOCFPGA_L4_SP_CLK)) { - l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC); - return !!(l4_src & 2); - } - - perpll_src = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC); - if (streq(clk->name, SOCFPGA_MMC_CLK)) - return perpll_src &= 0x3; - if (streq(clk->name, SOCFPGA_NAND_CLK) || - streq(clk->name, SOCFPGA_NAND_X_CLK)) - return (perpll_src >> 2) & 3; - - /* QSPI clock */ - return (perpll_src >> 4) & 3; -} - -static int clk_socfpga_set_parent(struct clk *clk, u8 parent) -{ - u32 src_reg; - - if (streq(clk->name, SOCFPGA_L4_MP_CLK)) { - src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC); - src_reg &= ~0x1; - src_reg |= parent; - writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC); - } else if (streq(clk->name, SOCFPGA_L4_SP_CLK)) { - src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC); - src_reg &= ~0x2; - src_reg |= (parent << 1); - writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC); - } else { - src_reg = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC); - if (streq(clk->name, SOCFPGA_MMC_CLK)) { - src_reg &= ~0x3; - src_reg |= parent; - } else if (streq(clk->name, SOCFPGA_NAND_CLK) || - streq(clk->name, SOCFPGA_NAND_X_CLK)) { - src_reg &= ~0xC; - src_reg |= (parent << 2); - } else {/* QSPI clock */ - src_reg &= ~0x30; - src_reg |= (parent << 4); - } - writel(src_reg, clk_mgr_base_addr + CLKMGR_PERPLL_SRC); - } - - return 0; -} - -static struct clk_ops clk_socfpga_ops = { - .recalc_rate = clk_socfpga_recalc_rate, - .enable = clk_socfpga_enable, - .disable = clk_socfpga_disable, - .is_enabled = clk_socfpga_is_enabled, - .get_parent = clk_socfpga_get_parent, - .set_parent = clk_socfpga_set_parent, -}; - -static struct clk *socfpga_gate_clk(struct device_node *node) -{ - u32 clk_gate[2]; - u32 div_reg[3]; - u32 fixed_div; - struct clk_socfpga *cs; - int ret; - int i = 0; - - cs = xzalloc(sizeof(*cs)); - - ret = of_property_read_u32_array(node, "clk-gate", clk_gate, 2); - if (ret) - clk_gate[0] = 0; - - if (clk_gate[0]) { - cs->reg = clk_mgr_base_addr + clk_gate[0]; - cs->bit_idx = clk_gate[1]; - } - - ret = of_property_read_u32(node, "fixed-divider", &fixed_div); - if (ret) - cs->fixed_div = 0; - else - cs->fixed_div = fixed_div; - - ret = of_property_read_u32_array(node, "div-reg", div_reg, 3); - if (!ret) { - cs->div_reg = clk_mgr_base_addr + div_reg[0]; - cs->shift = div_reg[1]; - cs->width = div_reg[2]; - } - - for (i = 0; i < SOCFGPA_MAX_PARENTS; i++) { - cs->parent_names[i] = of_clk_get_parent_name(node, i); - if (!cs->parent_names[i]) - break; - } - - cs->clk.parent_names = cs->parent_names; - cs->clk.num_parents = i; - cs->clk.name = xstrdup(node->name); - cs->clk.ops = &clk_socfpga_ops; - - ret = clk_register(&cs->clk); - if (ret) { - free(cs); - return ERR_PTR(ret); - } - - return &cs->clk; -} - -static void socfpga_register_clocks(struct device_d *dev, struct device_node *node) -{ - struct device_node *child; - struct clk *clk; - - for_each_child_of_node(node, child) { - socfpga_register_clocks(dev, child); - } - - if (of_device_is_compatible(node, "altr,socfpga-pll-clock")) - clk = socfpga_pll_clk(node); - else if (of_device_is_compatible(node, "altr,socfpga-perip-clk")) - clk = socfpga_periph_clk(node); - else if (of_device_is_compatible(node, "altr,socfpga-gate-clk")) - clk = socfpga_gate_clk(node); - else - return; - - of_clk_add_provider(node, of_clk_src_simple_get, clk); -} - -static int socfpga_ccm_probe(struct device_d *dev) -{ - struct resource *iores; - void __iomem *regs; - struct device_node *clknode; - - iores = dev_request_mem_resource(dev, 0); - if (IS_ERR(iores)) - return PTR_ERR(iores); - regs = IOMEM(iores->start); - - clk_mgr_base_addr = regs; - - clknode = of_get_child_by_name(dev->device_node, "clocks"); - if (!clknode) - return -EINVAL; - - socfpga_register_clocks(dev, clknode); - - return 0; -} - -static __maybe_unused struct of_device_id socfpga_ccm_dt_ids[] = { - { - .compatible = "altr,clk-mgr", - }, { - /* sentinel */ - } -}; - -static struct driver_d socfpga_ccm_driver = { - .probe = socfpga_ccm_probe, - .name = "socfpga-ccm", - .of_compatible = DRV_OF_COMPAT(socfpga_ccm_dt_ids), -}; - -static int socfpga_ccm_init(void) -{ - return platform_driver_register(&socfpga_ccm_driver); -} -core_initcall(socfpga_ccm_init); diff --git a/drivers/clk/socfpga/Makefile b/drivers/clk/socfpga/Makefile new file mode 100644 index 000000000000..fc216adb744e --- /dev/null +++ b/drivers/clk/socfpga/Makefile @@ -0,0 +1 @@ +obj-y += clk.o diff --git a/drivers/clk/socfpga/clk.c b/drivers/clk/socfpga/clk.c new file mode 100644 index 000000000000..6af0632cafc2 --- /dev/null +++ b/drivers/clk/socfpga/clk.c @@ -0,0 +1,434 @@ +/* + * Copyright (C) 2013 Sascha Hauer , Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that 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 + +/* Clock Manager offsets */ +#define CLKMGR_CTRL 0x0 +#define CLKMGR_BYPASS 0x4 +#define CLKMGR_L4SRC 0x70 +#define CLKMGR_PERPLL_SRC 0xAC + +/* Clock bypass bits */ +#define MAINPLL_BYPASS (1<<0) +#define SDRAMPLL_BYPASS (1<<1) +#define SDRAMPLL_SRC_BYPASS (1<<2) +#define PERPLL_BYPASS (1<<3) +#define PERPLL_SRC_BYPASS (1<<4) + +#define SOCFPGA_PLL_BG_PWRDWN 0 +#define SOCFPGA_PLL_EXT_ENA 1 +#define SOCFPGA_PLL_PWR_DOWN 2 +#define SOCFPGA_PLL_DIVF_MASK 0x0000FFF8 +#define SOCFPGA_PLL_DIVF_SHIFT 3 +#define SOCFPGA_PLL_DIVQ_MASK 0x003F0000 +#define SOCFPGA_PLL_DIVQ_SHIFT 16 +#define SOCFGPA_MAX_PARENTS 3 + +#define SOCFPGA_L4_MP_CLK "l4_mp_clk" +#define SOCFPGA_L4_SP_CLK "l4_sp_clk" +#define SOCFPGA_NAND_CLK "nand_clk" +#define SOCFPGA_NAND_X_CLK "nand_x_clk" +#define SOCFPGA_MMC_CLK "sdmmc_clk" +#define SOCFPGA_DB_CLK "gpio_db_clk" + +#define div_mask(width) ((1 << (width)) - 1) +#define streq(a, b) (strcmp((a), (b)) == 0) + +static void __iomem *clk_mgr_base_addr; + +struct clk_pll { + struct clk clk; + const char *parent; + unsigned regofs; +}; + +static unsigned long clk_pll_recalc_rate(struct clk *clk, + unsigned long parent_rate) +{ + struct clk_pll *pll = container_of(clk, struct clk_pll, clk); + unsigned long divf, divq, vco_freq, reg; + unsigned long bypass; + + reg = readl(clk_mgr_base_addr + pll->regofs); + + bypass = readl(clk_mgr_base_addr + CLKMGR_BYPASS); + if (bypass & MAINPLL_BYPASS) + return parent_rate; + + divf = (reg & SOCFPGA_PLL_DIVF_MASK) >> SOCFPGA_PLL_DIVF_SHIFT; + divq = (reg & SOCFPGA_PLL_DIVQ_MASK) >> SOCFPGA_PLL_DIVQ_SHIFT; + vco_freq = parent_rate * (divf + 1); + + return vco_freq / (1 + divq); +} + +static struct clk_ops clk_pll_ops = { + .recalc_rate = clk_pll_recalc_rate, +}; + +static struct clk *socfpga_pll_clk(struct device_node *node) +{ + struct clk_pll *pll; + int ret; + + pll = xzalloc(sizeof(*pll)); + + pll->parent = of_clk_get_parent_name(node, 0); + if (!pll->parent) + return ERR_PTR(-EINVAL); + + pll->clk.parent_names = &pll->parent; + pll->clk.num_parents = 1; + pll->clk.name = xstrdup(node->name); + pll->clk.ops = &clk_pll_ops; + + of_property_read_u32(node, "reg", &pll->regofs); + + ret = clk_register(&pll->clk); + if (ret) { + free(pll); + return ERR_PTR(ret); + } + + return &pll->clk; +} + +struct clk_periph { + struct clk clk; + const char *parent; + unsigned regofs; + unsigned int fixed_div; + void __iomem *div_reg; + unsigned int width; + unsigned int shift; +}; + +static unsigned long clk_periph_recalc_rate(struct clk *clk, + unsigned long parent_rate) +{ + struct clk_periph *periph = container_of(clk, struct clk_periph, clk); + u32 div, val; + + if (periph->fixed_div) { + div = periph->fixed_div; + } else { + if (periph->div_reg) { + val = readl(periph->div_reg) >> periph->shift; + val &= div_mask(periph->width); + parent_rate /= (val + 1); + } + div = ((readl(clk_mgr_base_addr + periph->regofs) & 0x1ff) + 1); + } + + return parent_rate / div; +} + +static struct clk_ops clk_periph_ops = { + .recalc_rate = clk_periph_recalc_rate, +}; + +static struct clk *socfpga_periph_clk(struct device_node *node) +{ + struct clk_periph *periph; + int ret; + u32 div_reg[3]; + + periph = xzalloc(sizeof(*periph)); + + periph->parent = of_clk_get_parent_name(node, 0); + if (!periph->parent) + return ERR_PTR(-EINVAL); + + periph->clk.parent_names = &periph->parent; + periph->clk.num_parents = 1; + periph->clk.name = xstrdup(node->name); + periph->clk.ops = &clk_periph_ops; + + ret = of_property_read_u32_array(node, "div-reg", div_reg, 3); + if (!ret) { + periph->div_reg = clk_mgr_base_addr + div_reg[0]; + periph->shift = div_reg[1]; + periph->width = div_reg[2]; + } else { + periph->div_reg = 0; + } + + of_property_read_u32(node, "reg", &periph->regofs); + of_property_read_u32(node, "fixed-divider", &periph->fixed_div); + + ret = clk_register(&periph->clk); + if (ret) { + free(periph); + return ERR_PTR(ret); + } + + return &periph->clk; +} + +struct clk_socfpga { + struct clk clk; + const char *parent; + void __iomem *reg; + void __iomem *div_reg; + unsigned int fixed_div; + unsigned int bit_idx; + unsigned int shift; + unsigned int width; + const char *parent_names[SOCFGPA_MAX_PARENTS]; +}; + +static int clk_socfpga_enable(struct clk *clk) +{ + struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); + u32 val; + + val = readl(cs->reg); + val |= 1 << cs->shift; + writel(val, cs->reg); + + return 0; +} + +static void clk_socfpga_disable(struct clk *clk) +{ + struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); + u32 val; + + val = readl(cs->reg); + val &= ~(1 << cs->shift); + writel(val, cs->reg); +} + +static int clk_socfpga_is_enabled(struct clk *clk) +{ + struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); + u32 val; + + val = readl(cs->reg); + + if (val & (1 << cs->shift)) + return 1; + else + return 0; +} + +static unsigned long clk_socfpga_recalc_rate(struct clk *clk, + unsigned long parent_rate) +{ + struct clk_socfpga *cs = container_of(clk, struct clk_socfpga, clk); + u32 div = 1, val; + + if (cs->fixed_div) { + div = cs->fixed_div; + } else if (cs->div_reg) { + val = readl(cs->div_reg) >> cs->shift; + val &= div_mask(cs->width); + if (streq(clk->name, SOCFPGA_DB_CLK)) + div = val + 1; + else + div = (1 << val); + } + + return parent_rate / div; +} + +static int clk_socfpga_get_parent(struct clk *clk) +{ + u32 perpll_src; + u32 l4_src; + + if (streq(clk->name, SOCFPGA_L4_MP_CLK)) { + l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC); + return l4_src &= 0x1; + } + if (streq(clk->name, SOCFPGA_L4_SP_CLK)) { + l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC); + return !!(l4_src & 2); + } + + perpll_src = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC); + if (streq(clk->name, SOCFPGA_MMC_CLK)) + return perpll_src &= 0x3; + if (streq(clk->name, SOCFPGA_NAND_CLK) || + streq(clk->name, SOCFPGA_NAND_X_CLK)) + return (perpll_src >> 2) & 3; + + /* QSPI clock */ + return (perpll_src >> 4) & 3; +} + +static int clk_socfpga_set_parent(struct clk *clk, u8 parent) +{ + u32 src_reg; + + if (streq(clk->name, SOCFPGA_L4_MP_CLK)) { + src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC); + src_reg &= ~0x1; + src_reg |= parent; + writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC); + } else if (streq(clk->name, SOCFPGA_L4_SP_CLK)) { + src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC); + src_reg &= ~0x2; + src_reg |= (parent << 1); + writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC); + } else { + src_reg = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC); + if (streq(clk->name, SOCFPGA_MMC_CLK)) { + src_reg &= ~0x3; + src_reg |= parent; + } else if (streq(clk->name, SOCFPGA_NAND_CLK) || + streq(clk->name, SOCFPGA_NAND_X_CLK)) { + src_reg &= ~0xC; + src_reg |= (parent << 2); + } else {/* QSPI clock */ + src_reg &= ~0x30; + src_reg |= (parent << 4); + } + writel(src_reg, clk_mgr_base_addr + CLKMGR_PERPLL_SRC); + } + + return 0; +} + +static struct clk_ops clk_socfpga_ops = { + .recalc_rate = clk_socfpga_recalc_rate, + .enable = clk_socfpga_enable, + .disable = clk_socfpga_disable, + .is_enabled = clk_socfpga_is_enabled, + .get_parent = clk_socfpga_get_parent, + .set_parent = clk_socfpga_set_parent, +}; + +static struct clk *socfpga_gate_clk(struct device_node *node) +{ + u32 clk_gate[2]; + u32 div_reg[3]; + u32 fixed_div; + struct clk_socfpga *cs; + int ret; + int i = 0; + + cs = xzalloc(sizeof(*cs)); + + ret = of_property_read_u32_array(node, "clk-gate", clk_gate, 2); + if (ret) + clk_gate[0] = 0; + + if (clk_gate[0]) { + cs->reg = clk_mgr_base_addr + clk_gate[0]; + cs->bit_idx = clk_gate[1]; + } + + ret = of_property_read_u32(node, "fixed-divider", &fixed_div); + if (ret) + cs->fixed_div = 0; + else + cs->fixed_div = fixed_div; + + ret = of_property_read_u32_array(node, "div-reg", div_reg, 3); + if (!ret) { + cs->div_reg = clk_mgr_base_addr + div_reg[0]; + cs->shift = div_reg[1]; + cs->width = div_reg[2]; + } + + for (i = 0; i < SOCFGPA_MAX_PARENTS; i++) { + cs->parent_names[i] = of_clk_get_parent_name(node, i); + if (!cs->parent_names[i]) + break; + } + + cs->clk.parent_names = cs->parent_names; + cs->clk.num_parents = i; + cs->clk.name = xstrdup(node->name); + cs->clk.ops = &clk_socfpga_ops; + + ret = clk_register(&cs->clk); + if (ret) { + free(cs); + return ERR_PTR(ret); + } + + return &cs->clk; +} + +static void socfpga_register_clocks(struct device_d *dev, struct device_node *node) +{ + struct device_node *child; + struct clk *clk; + + for_each_child_of_node(node, child) { + socfpga_register_clocks(dev, child); + } + + if (of_device_is_compatible(node, "altr,socfpga-pll-clock")) + clk = socfpga_pll_clk(node); + else if (of_device_is_compatible(node, "altr,socfpga-perip-clk")) + clk = socfpga_periph_clk(node); + else if (of_device_is_compatible(node, "altr,socfpga-gate-clk")) + clk = socfpga_gate_clk(node); + else + return; + + of_clk_add_provider(node, of_clk_src_simple_get, clk); +} + +static int socfpga_ccm_probe(struct device_d *dev) +{ + struct resource *iores; + void __iomem *regs; + struct device_node *clknode; + + iores = dev_request_mem_resource(dev, 0); + if (IS_ERR(iores)) + return PTR_ERR(iores); + regs = IOMEM(iores->start); + + clk_mgr_base_addr = regs; + + clknode = of_get_child_by_name(dev->device_node, "clocks"); + if (!clknode) + return -EINVAL; + + socfpga_register_clocks(dev, clknode); + + return 0; +} + +static __maybe_unused struct of_device_id socfpga_ccm_dt_ids[] = { + { + .compatible = "altr,clk-mgr", + }, { + /* sentinel */ + } +}; + +static struct driver_d socfpga_ccm_driver = { + .probe = socfpga_ccm_probe, + .name = "socfpga-ccm", + .of_compatible = DRV_OF_COMPAT(socfpga_ccm_dt_ids), +}; + +static int socfpga_ccm_init(void) +{ + return platform_driver_register(&socfpga_ccm_driver); +} +core_initcall(socfpga_ccm_init); -- git-series 0.9.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox