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path: root/drivers/clk/tegra/clk-tegra-super-gen4.c
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Diffstat (limited to 'drivers/clk/tegra/clk-tegra-super-gen4.c')
-rw-r--r--drivers/clk/tegra/clk-tegra-super-gen4.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/drivers/clk/tegra/clk-tegra-super-gen4.c b/drivers/clk/tegra/clk-tegra-super-gen4.c
new file mode 100644
index 000000000..5760c978b
--- /dev/null
+++ b/drivers/clk/tegra/clk-tegra-super-gen4.c
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2012, 2013, NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/io.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_BURST_POLICY 0x028
+#define SYSTEM_CLK_RATE 0x030
+#define SCLK_DIVIDER 0x2c
+
+static DEFINE_SPINLOCK(sysrate_lock);
+
+enum tegra_super_gen {
+ gen4 = 4,
+ gen5,
+};
+
+struct tegra_super_gen_info {
+ enum tegra_super_gen gen;
+ const char **sclk_parents;
+ const char **cclk_g_parents;
+ const char **cclk_lp_parents;
+ int num_sclk_parents;
+ int num_cclk_g_parents;
+ int num_cclk_lp_parents;
+};
+
+static const char *sclk_parents[] = { "clk_m", "pll_c_out1", "pll_p_out4",
+ "pll_p", "pll_p_out2", "unused",
+ "clk_32k", "pll_m_out1" };
+
+static const char *cclk_g_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m",
+ "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", "pll_c", "clk_32k", "pll_m",
+ "pll_p", "pll_p_out4", "unused",
+ "unused", "pll_x", "pll_x_out0" };
+
+static const struct tegra_super_gen_info tegra_super_gen_info_gen4 = {
+ .gen = gen4,
+ .sclk_parents = sclk_parents,
+ .cclk_g_parents = cclk_g_parents,
+ .cclk_lp_parents = cclk_lp_parents,
+ .num_sclk_parents = ARRAY_SIZE(sclk_parents),
+ .num_cclk_g_parents = ARRAY_SIZE(cclk_g_parents),
+ .num_cclk_lp_parents = ARRAY_SIZE(cclk_lp_parents),
+};
+
+static const char *sclk_parents_gen5[] = { "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_gen5[] = { "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_gen5[] = { "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 struct tegra_super_gen_info tegra_super_gen_info_gen5 = {
+ .gen = gen5,
+ .sclk_parents = sclk_parents_gen5,
+ .cclk_g_parents = cclk_g_parents_gen5,
+ .cclk_lp_parents = cclk_lp_parents_gen5,
+ .num_sclk_parents = ARRAY_SIZE(sclk_parents_gen5),
+ .num_cclk_g_parents = ARRAY_SIZE(cclk_g_parents_gen5),
+ .num_cclk_lp_parents = ARRAY_SIZE(cclk_lp_parents_gen5),
+};
+
+static void __init tegra_sclk_init(void __iomem *clk_base,
+ struct tegra_clk *tegra_clks,
+ const struct tegra_super_gen_info *gen_info)
+{
+ 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",
+ gen_info->sclk_parents,
+ gen_info->num_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",
+ CLK_IS_CRITICAL,
+ clk_base + SCLK_DIVIDER, 0, 8,
+ 0, &sysrate_lock);
+ *dt_clk = clk;
+ }
+ } else {
+ /* SCLK */
+ dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks);
+ if (dt_clk) {
+ clk = tegra_clk_register_super_mux("sclk",
+ gen_info->sclk_parents,
+ gen_info->num_sclk_parents,
+ CLK_SET_RATE_PARENT |
+ CLK_IS_CRITICAL,
+ clk_base + SCLK_BURST_POLICY,
+ 0, 4, 0, 0, NULL);
+ *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_IS_CRITICAL,
+ 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_IS_CRITICAL, clk_base + SYSTEM_CLK_RATE,
+ 3, CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
+ *dt_clk = clk;
+}
+
+static void __init tegra_super_clk_init(void __iomem *clk_base,
+ void __iomem *pmc_base,
+ struct tegra_clk *tegra_clks,
+ struct tegra_clk_pll_params *params,
+ const struct tegra_super_gen_info *gen_info)
+{
+ struct clk *clk;
+ struct clk **dt_clk;
+
+ /* CCLKG */
+ dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_g, tegra_clks);
+ if (dt_clk) {
+ if (gen_info->gen == gen5) {
+ clk = tegra_clk_register_super_mux("cclk_g",
+ gen_info->cclk_g_parents,
+ gen_info->num_cclk_g_parents,
+ CLK_SET_RATE_PARENT,
+ clk_base + CCLKG_BURST_POLICY,
+ TEGRA210_CPU_CLK, 4, 8, 0, NULL);
+ } else {
+ clk = tegra_clk_register_super_mux("cclk_g",
+ gen_info->cclk_g_parents,
+ gen_info->num_cclk_g_parents,
+ CLK_SET_RATE_PARENT,
+ clk_base + CCLKG_BURST_POLICY,
+ 0, 4, 0, 0, NULL);
+ }
+ *dt_clk = clk;
+ }
+
+ /* CCLKLP */
+ dt_clk = tegra_lookup_dt_id(tegra_clk_cclk_lp, tegra_clks);
+ if (dt_clk) {
+ if (gen_info->gen == gen5) {
+ /*
+ * TEGRA210_CPU_CLK flag is not needed for cclk_lp as
+ * cluster switching is not currently supported on
+ * Tegra210 and also cpu_lp is not used.
+ */
+ clk = tegra_clk_register_super_mux("cclk_lp",
+ gen_info->cclk_lp_parents,
+ gen_info->num_cclk_lp_parents,
+ CLK_SET_RATE_PARENT,
+ clk_base + CCLKLP_BURST_POLICY,
+ 0, 4, 8, 0, NULL);
+ } else {
+ clk = tegra_clk_register_super_mux("cclk_lp",
+ gen_info->cclk_lp_parents,
+ gen_info->num_cclk_lp_parents,
+ CLK_SET_RATE_PARENT,
+ clk_base + CCLKLP_BURST_POLICY,
+ TEGRA_DIVIDER_2, 4, 8, 9, NULL);
+ }
+ *dt_clk = clk;
+ }
+
+ tegra_sclk_init(clk_base, tegra_clks, gen_info);
+
+#if defined(CONFIG_ARCH_TEGRA_114_SOC) || \
+ defined(CONFIG_ARCH_TEGRA_124_SOC) || \
+ defined(CONFIG_ARCH_TEGRA_210_SOC)
+ /* PLLX */
+ dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x, tegra_clks);
+ if (!dt_clk)
+ return;
+
+#if defined(CONFIG_ARCH_TEGRA_210_SOC)
+ if (gen_info->gen == gen5)
+ clk = tegra_clk_register_pllc_tegra210("pll_x", "pll_ref",
+ clk_base, pmc_base, CLK_IGNORE_UNUSED, params, NULL);
+ else
+#endif
+ clk = tegra_clk_register_pllxc("pll_x", "pll_ref", clk_base,
+ pmc_base, CLK_IGNORE_UNUSED, params, NULL);
+
+ *dt_clk = clk;
+
+ /* PLLX_OUT0 */
+
+ dt_clk = tegra_lookup_dt_id(tegra_clk_pll_x_out0, tegra_clks);
+ if (!dt_clk)
+ return;
+ clk = clk_register_fixed_factor(NULL, "pll_x_out0", "pll_x",
+ CLK_SET_RATE_PARENT, 1, 2);
+ *dt_clk = clk;
+#endif
+}
+
+void __init tegra_super_clk_gen4_init(void __iomem *clk_base,
+ void __iomem *pmc_base,
+ struct tegra_clk *tegra_clks,
+ struct tegra_clk_pll_params *params)
+{
+ tegra_super_clk_init(clk_base, pmc_base, tegra_clks, params,
+ &tegra_super_gen_info_gen4);
+}
+
+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)
+{
+ tegra_super_clk_init(clk_base, pmc_base, tegra_clks, params,
+ &tegra_super_gen_info_gen5);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-02 23:29:21 +0000