From: Bill Huang <bilhu...@nvidia.com> Super clock divider control and clock source mux of Tegra210 has changed a little against prior SoCs, this patch adds Gen5 logic to address those differences.
Signed-off-by: Bill Huang <bilhu...@nvidia.com> --- v2: - Fixed sclk divider address (0x370 -> 0x2c) drivers/clk/tegra/Makefile | 1 + drivers/clk/tegra/clk-tegra-super-gen5.c | 150 ++++++++++++++++++++++++++++++ drivers/clk/tegra/clk.h | 3 + 3 files changed, 154 insertions(+) create mode 100644 drivers/clk/tegra/clk-tegra-super-gen5.c diff --git a/drivers/clk/tegra/Makefile b/drivers/clk/tegra/Makefile index dbc9360e551c..0ba495b852e6 100644 --- a/drivers/clk/tegra/Makefile +++ b/drivers/clk/tegra/Makefile @@ -11,6 +11,7 @@ obj-y += clk-tegra-periph.o obj-y += clk-tegra-pmc.o obj-y += clk-tegra-fixed.o obj-y += clk-tegra-super-gen4.o +obj-y += clk-tegra-super-gen5.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += clk-tegra20.o obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += clk-tegra30.o obj-$(CONFIG_ARCH_TEGRA_114_SOC) += clk-tegra114.o diff --git a/drivers/clk/tegra/clk-tegra-super-gen5.c b/drivers/clk/tegra/clk-tegra-super-gen5.c new file mode 100644 index 000000000000..14c3c3ad2079 --- /dev/null +++ b/drivers/clk/tegra/clk-tegra-super-gen5.c @@ -0,0 +1,150 @@ +/* + * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/delay.h> +#include <linux/export.h> +#include <linux/clk/tegra.h> + +#include "clk.h" +#include "clk-id.h" + +#define PLLX_BASE 0xe0 +#define PLLX_MISC 0xe4 +#define PLLX_MISC2 0x514 +#define PLLX_MISC3 0x518 + +#define CCLKG_BURST_POLICY 0x368 +#define CCLKLP_BURST_POLICY 0x370 +#define SCLK_DIVIDER 0x2c +#define SCLK_BURST_POLICY 0x028 +#define SYSTEM_CLK_RATE 0x030 + +static DEFINE_SPINLOCK(sysrate_lock); + +static const char *sclk_parents[] = { "clk_m", "pll_c_out1", "pll_c4_out3", + "pll_p", "pll_p_out2", "pll_c4_out1", + "clk_32k", "pll_c4_out2" }; + +static const char *cclk_g_parents[] = { "clk_m", "unused", "clk_32k", "unused", + "pll_p", "pll_p_out4", "unused", + "unused", "pll_x", "unused", "unused", + "unused", "unused", "unused", "unused", + "dfllCPU_out" }; + +static const char *cclk_lp_parents[] = { "clk_m", "unused", "clk_32k", "unused", + "pll_p", "pll_p_out4", "unused", + "unused", "pll_x", "unused", "unused", + "unused", "unused", "unused", "unused", + "dfllCPU_out" }; + +static void __init tegra_sclk_init(void __iomem *clk_base, + struct tegra_clk *tegra_clks) +{ + struct clk *clk; + struct clk **dt_clk; + + /* SCLK_MUX */ + dt_clk = tegra_lookup_dt_id(tegra_clk_sclk_mux, tegra_clks); + if (dt_clk) { + clk = tegra_clk_register_super_mux("sclk_mux", sclk_parents, + ARRAY_SIZE(sclk_parents), + CLK_SET_RATE_PARENT, + clk_base + SCLK_BURST_POLICY, + 0, 4, 0, 0, NULL); + *dt_clk = clk; + } + /* SCLK */ + dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks); + if (dt_clk) { + clk = clk_register_divider(NULL, "sclk", "sclk_mux", 0, + clk_base + SCLK_DIVIDER, 0, 8, + 0, &sysrate_lock); + *dt_clk = clk; + } + + /* HCLK */ + dt_clk = tegra_lookup_dt_id(tegra_clk_hclk, tegra_clks); + if (dt_clk) { + clk = clk_register_divider(NULL, "hclk_div", "sclk", 0, + clk_base + SYSTEM_CLK_RATE, 4, 2, 0, + &sysrate_lock); + clk = clk_register_gate(NULL, "hclk", "hclk_div", + CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED, + clk_base + SYSTEM_CLK_RATE, + 7, CLK_GATE_SET_TO_DISABLE, &sysrate_lock); + *dt_clk = clk; + } + + /* PCLK */ + dt_clk = tegra_lookup_dt_id(tegra_clk_pclk, tegra_clks); + if (!dt_clk) + return; + + clk = clk_register_divider(NULL, "pclk_div", "hclk", 0, + clk_base + SYSTEM_CLK_RATE, 0, 2, 0, + &sysrate_lock); + clk = clk_register_gate(NULL, "pclk", "pclk_div", CLK_SET_RATE_PARENT | + CLK_IGNORE_UNUSED, clk_base + SYSTEM_CLK_RATE, + 3, CLK_GATE_SET_TO_DISABLE, &sysrate_lock); + *dt_clk = clk; +} + +void __init tegra_super_clk_gen5_init(void __iomem *clk_base, + void __iomem *pmc_base, + struct tegra_clk *tegra_clks, + struct tegra_clk_pll_params *params) +{ + struct clk *clk; + struct clk **dt_clk; + + /* CCLKG */ + dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_g, tegra_clks); + if (dt_clk) { + clk = tegra_clk_register_super_mux("cclk_g", cclk_g_parents, + ARRAY_SIZE(cclk_g_parents), + CLK_SET_RATE_PARENT, + clk_base + CCLKG_BURST_POLICY, + 0, 4, 8, 0, NULL); + *dt_clk = clk; + } + + /* CCLKLP */ + dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_lp, tegra_clks); + if (dt_clk) { + clk = tegra_clk_register_super_mux("cclk_lp", cclk_lp_parents, + ARRAY_SIZE(cclk_lp_parents), + CLK_SET_RATE_PARENT, + clk_base + CCLKLP_BURST_POLICY, + 0, 4, 8, 0, NULL); + *dt_clk = clk; + } + + tegra_sclk_init(clk_base, tegra_clks); + + /* PLLX */ + dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x, tegra_clks); + if (!dt_clk) + return; + + clk = tegra_clk_register_pllxc("pll_x", "pll_ref", clk_base, + pmc_base, CLK_IGNORE_UNUSED, params, NULL); + *dt_clk = clk; +} diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index 84c417576c18..8556837d96f8 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -701,6 +701,9 @@ int tegra_osc_clk_init(void __iomem *clk_base, struct tegra_clk *clks, void tegra_super_clk_gen4_init(void __iomem *clk_base, void __iomem *pmc_base, struct tegra_clk *tegra_clks, struct tegra_clk_pll_params *pll_params); +void tegra_super_clk_gen5_init(void __iomem *clk_base, + void __iomem *pmc_base, struct tegra_clk *tegra_clks, + struct tegra_clk_pll_params *pll_params); #ifdef CONFIG_TEGRA_CLK_EMC struct clk *tegra_emc_init(struct device_node *np, void __iomem *clk_regs, -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
