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Subject[PATCH v4 13/15] clk: tegra: introduce common gen4 super clock
Date
Introduce a common function which performs super clock initialization for
Tegra114 and beyond.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
drivers/clk/tegra/Makefile | 1 +
drivers/clk/tegra/clk-tegra-super-gen4.c | 151 ++++++++++++++++++++++++++++++
drivers/clk/tegra/clk-tegra114.c | 76 +---------------
drivers/clk/tegra/clk.h | 3 +
4 files changed, 157 insertions(+), 74 deletions(-)
create mode 100644 drivers/clk/tegra/clk-tegra-super-gen4.c

diff --git a/drivers/clk/tegra/Makefile b/drivers/clk/tegra/Makefile
index a02e9a9..2d83741 100644
--- a/drivers/clk/tegra/Makefile
+++ b/drivers/clk/tegra/Makefile
@@ -10,6 +10,7 @@ obj-y += clk-tegra-audio.o
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-$(CONFIG_ARCH_TEGRA_2x_SOC) += clk-tegra20.o
obj-$(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-gen4.c b/drivers/clk/tegra/clk-tegra-super-gen4.c
new file mode 100644
index 0000000..161e00a
--- /dev/null
+++ b/drivers/clk/tegra/clk-tegra-super-gen4.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2012, 2013, 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/clkdev.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 PLL_BASE_LOCK BIT(27)
+#define PLL_MISC_LOCK_ENABLE 18
+
+#define CCLKG_BURST_POLICY 0x368
+#define CCLKLP_BURST_POLICY 0x370
+#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_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" };
+
+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 void __init tegra_sclk_init(void __iomem *clk_base,
+ struct tegra_clk *tegra_clks)
+{
+ struct clk *clk;
+ struct clk **dt_clk;
+
+ /* SCLK */
+ dt_clk = tegra_lookup_dt_id(tegra_clk_sclk, tegra_clks);
+ if (dt_clk) {
+ clk = tegra_clk_register_super_mux("sclk", sclk_parents,
+ ARRAY_SIZE(sclk_parents),
+ CLK_SET_RATE_PARENT,
+ 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_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_gen4_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, 0, 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, 9, 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;
+
+ /* 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;
+
+}
+
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
index 87a2162..b17feea 100644
--- a/drivers/clk/tegra/clk-tegra114.c
+++ b/drivers/clk/tegra/clk-tegra114.c
@@ -119,9 +119,6 @@
#define PLLXC_SW_MAX_P 6

#define CCLKG_BURST_POLICY 0x368
-#define CCLKLP_BURST_POLICY 0x370
-#define SCLK_BURST_POLICY 0x028
-#define SYSTEM_CLK_RATE 0x030

#define UTMIP_PLL_CFG2 0x488
#define UTMIP_PLL_CFG2_STABLE_COUNT(x) (((x) & 0xffff) << 6)
@@ -175,7 +172,6 @@ static DEFINE_SPINLOCK(pll_d_lock);
static DEFINE_SPINLOCK(pll_d2_lock);
static DEFINE_SPINLOCK(pll_u_lock);
static DEFINE_SPINLOCK(pll_re_lock);
-static DEFINE_SPINLOCK(sysrate_lock);

static struct div_nmp pllxc_nmp = {
.divm_shift = 0,
@@ -1117,16 +1113,6 @@ static void __init tegra114_pll_init(void __iomem *clk_base,
clk = clk_register_fixed_factor(NULL, "pll_m_ud", "pll_m",
CLK_SET_RATE_PARENT, 1, 1);

- /* PLLX */
- clk = tegra_clk_register_pllxc("pll_x", "pll_ref", clk_base,
- pmc, CLK_IGNORE_UNUSED, &pll_x_params, NULL);
- clks[TEGRA114_CLK_PLL_X] = clk;
-
- /* PLLX_OUT0 */
- clk = clk_register_fixed_factor(NULL, "pll_x_out0", "pll_x",
- CLK_SET_RATE_PARENT, 1, 2);
- clks[TEGRA114_CLK_PLL_X_OUT0] = clk;
-
/* PLLU */
val = readl(clk_base + pll_u_params.base_reg);
val &= ~BIT(24); /* disable PLLU_OVERRIDE */
@@ -1195,65 +1181,6 @@ static void __init tegra114_pll_init(void __iomem *clk_base,
clks[TEGRA114_CLK_PLL_E_OUT0] = clk;
}

-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" };
-
-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 void __init tegra114_super_clk_init(void __iomem *clk_base)
-{
- struct clk *clk;
-
- /* CCLKG */
- 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, 0, 0, NULL);
- clks[TEGRA114_CLK_CCLK_G] = clk;
-
- /* CCLKLP */
- 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, 9, NULL);
- clks[TEGRA114_CLK_CCLK_LP] = clk;
-
- /* SCLK */
- clk = tegra_clk_register_super_mux("sclk", sclk_parents,
- ARRAY_SIZE(sclk_parents),
- CLK_SET_RATE_PARENT,
- clk_base + SCLK_BURST_POLICY,
- 0, 4, 0, 0, NULL);
- clks[TEGRA114_CLK_SCLK] = clk;
-
- /* HCLK */
- 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);
- clks[TEGRA114_CLK_HCLK] = clk;
-
- /* PCLK */
- 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);
- clks[TEGRA114_CLK_PCLK] = clk;
-}
-
static __init void tegra114_periph_clk_init(void __iomem *clk_base,
void __iomem *pmc_base)
{
@@ -1544,7 +1471,8 @@ static void __init tegra114_clock_init(struct device_node *np)
tegra114_periph_clk_init(clk_base, pmc_base);
tegra_audio_clk_init(clk_base, pmc_base, tegra114_clks, &pll_a_params);
tegra_pmc_clk_init(pmc_base, tegra114_clks);
- tegra114_super_clk_init(clk_base);
+ tegra_super_clk_gen4_init(clk_base, pmc_base, tegra114_clks,
+ &pll_x_params);

tegra_add_of_provider(np);
tegra_register_devclks(devclks, ARRAY_SIZE(devclks));
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index 2d48817..05abfc5 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -610,6 +610,9 @@ int tegra_osc_clk_init(void __iomem *clk_base, struct tegra_clk *tegra_clks,
unsigned long *input_freqs, int num,
unsigned long *osc_freq,
unsigned long *pll_ref_freq);
+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 tegra114_clock_tune_cpu_trimmers_high(void);
void tegra114_clock_tune_cpu_trimmers_low(void);
--
1.7.7.rc0.72.g4b5ea.dirty


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