[PATCH v2 3/3] clk: meson8b: Add support for Meson8b clocks
Carlo Caione
carlo at caione.org
Sat May 16 03:48:53 PDT 2015
From: Carlo Caione <carlo at endlessm.com>
This patch adds support for the basic clocks found on the Amlogic
Meson8b SoCs.
Signed-off-by: Carlo Caione <carlo at endlessm.com>
---
drivers/clk/meson/Makefile | 1 +
drivers/clk/meson/meson8b-clkc.c | 182 +++++++++++++++++++++++++++++++++++++++
2 files changed, 183 insertions(+)
create mode 100644 drivers/clk/meson/meson8b-clkc.c
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index 66c6d8d..6d45531 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -3,3 +3,4 @@
#
obj-y += clkc.o clk-pll.o clk-cpu.o
+obj-y += meson8b-clkc.o
diff --git a/drivers/clk/meson/meson8b-clkc.c b/drivers/clk/meson/meson8b-clkc.c
new file mode 100644
index 0000000..b8be5c7
--- /dev/null
+++ b/drivers/clk/meson/meson8b-clkc.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2015 Endless Mobile, Inc.
+ * Author: Carlo Caione <carlo at endlessm.com>
+ *
+ * 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/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <dt-bindings/clock/meson8b-clkc.h>
+
+#include "clkc.h"
+
+#define MESON8B_REG_CTL0_ADDR 0x0000
+#define MESON8B_REG_SYS_CPU_CNTL1 0x015c
+#define MESON8B_REG_HHI_MPEG 0x0174
+#define MESON8B_REG_MALI 0x01b0
+#define MESON8B_REG_PLL_FIXED 0x0280
+#define MESON8B_REG_PLL_SYS 0x0300
+#define MESON8B_REG_PLL_VID 0x0320
+
+static struct pll_rate_table sys_pll_rate_table[] = {
+ PLL_RATE(312000000, 52, 1, 2),
+ PLL_RATE(336000000, 56, 1, 2),
+ PLL_RATE(360000000, 60, 1, 2),
+ PLL_RATE(384000000, 64, 1, 2),
+ PLL_RATE(408000000, 68, 1, 2),
+ PLL_RATE(432000000, 72, 1, 2),
+ PLL_RATE(456000000, 76, 1, 2),
+ PLL_RATE(480000000, 80, 1, 2),
+ PLL_RATE(504000000, 84, 1, 2),
+ PLL_RATE(528000000, 88, 1, 2),
+ PLL_RATE(552000000, 92, 1, 2),
+ PLL_RATE(576000000, 96, 1, 2),
+ PLL_RATE(600000000, 50, 1, 1),
+ PLL_RATE(624000000, 52, 1, 1),
+ PLL_RATE(648000000, 54, 1, 1),
+ PLL_RATE(672000000, 56, 1, 1),
+ PLL_RATE(696000000, 58, 1, 1),
+ PLL_RATE(720000000, 60, 1, 1),
+ PLL_RATE(744000000, 62, 1, 1),
+ PLL_RATE(768000000, 64, 1, 1),
+ PLL_RATE(792000000, 66, 1, 1),
+ PLL_RATE(816000000, 68, 1, 1),
+ PLL_RATE(840000000, 70, 1, 1),
+ PLL_RATE(864000000, 72, 1, 1),
+ PLL_RATE(888000000, 74, 1, 1),
+ PLL_RATE(912000000, 76, 1, 1),
+ PLL_RATE(936000000, 78, 1, 1),
+ PLL_RATE(960000000, 80, 1, 1),
+ PLL_RATE(984000000, 82, 1, 1),
+ PLL_RATE(1008000000, 84, 1, 1),
+ PLL_RATE(1032000000, 86, 1, 1),
+ PLL_RATE(1056000000, 88, 1, 1),
+ PLL_RATE(1080000000, 90, 1, 1),
+ PLL_RATE(1104000000, 92, 1, 1),
+ PLL_RATE(1128000000, 94, 1, 1),
+ PLL_RATE(1152000000, 96, 1, 1),
+ PLL_RATE(1176000000, 98, 1, 1),
+ PLL_RATE(1200000000, 50, 1, 0),
+ PLL_RATE(1224000000, 51, 1, 0),
+ PLL_RATE(1248000000, 52, 1, 0),
+ PLL_RATE(1272000000, 53, 1, 0),
+ PLL_RATE(1296000000, 54, 1, 0),
+ PLL_RATE(1320000000, 55, 1, 0),
+ PLL_RATE(1344000000, 56, 1, 0),
+ PLL_RATE(1368000000, 57, 1, 0),
+ PLL_RATE(1392000000, 58, 1, 0),
+ PLL_RATE(1416000000, 59, 1, 0),
+ PLL_RATE(1440000000, 60, 1, 0),
+ PLL_RATE(1464000000, 61, 1, 0),
+ PLL_RATE(1488000000, 62, 1, 0),
+ PLL_RATE(1512000000, 63, 1, 0),
+ PLL_RATE(1536000000, 64, 1, 0),
+ { /* sentinel */ },
+};
+
+PNAME(p_xtal) = { "xtal" };
+PNAME(p_fclk_div) = { "fixed_pll" };
+PNAME(p_cpu_clk) = { "sys_pll" };
+PNAME(p_clk81) = { "fclk_div3", "fclk_div4", "fclk_div5" };
+PNAME(p_mali) = { "fclk_div3", "fclk_div4", "fclk_div5",
+ "fclk_div7", "zero" };
+
+static u32 mux_table_clk81[] = { 6, 5, 7 };
+static u32 mux_table_mali[] = { 6, 5, 7, 4, 0 };
+
+static struct pll_conf pll_confs = {
+ .m = PARM(0x00, 0, 9),
+ .n = PARM(0x00, 9, 5),
+ .od = PARM(0x00, 16, 2),
+};
+
+static struct pll_conf sys_pll_conf = {
+ .m = PARM(0x00, 0, 9),
+ .n = PARM(0x00, 9, 5),
+ .od = PARM(0x00, 16, 2),
+ .rate_table = sys_pll_rate_table,
+};
+
+static struct composite_conf clk81_conf __initdata = {
+ .mux_table = mux_table_clk81,
+ .mux_flags = CLK_MUX_READ_ONLY,
+ .mux_parm = PARM(0x00, 12, 3),
+ .div_parm = PARM(0x00, 0, 7),
+ .gate_parm = PARM(0x00, 7, 1),
+};
+
+static struct composite_conf mali_conf __initdata = {
+ .mux_table = mux_table_mali,
+ .mux_parm = PARM(0x00, 9, 3),
+ .div_parm = PARM(0x00, 0, 7),
+ .gate_parm = PARM(0x00, 8, 1),
+};
+
+static struct clk_conf meson8b_xtal_conf __initdata =
+ FIXED_RATE_P(MESON8B_REG_CTL0_ADDR, CLKID_XTAL, "xtal",
+ CLK_IS_ROOT, PARM(0x00, 4, 7));
+
+static struct clk_conf meson8b_clk_confs[] __initdata = {
+ FIXED_RATE(CLKID_ZERO, "zero", CLK_IS_ROOT, 0),
+ PLL(MESON8B_REG_PLL_FIXED, CLKID_PLL_FIXED, "fixed_pll",
+ p_xtal, 0, &pll_confs),
+ PLL(MESON8B_REG_PLL_VID, CLKID_PLL_VID, "vid_pll",
+ p_xtal, 0, &pll_confs),
+ PLL(MESON8B_REG_PLL_SYS, CLKID_PLL_SYS, "sys_pll",
+ p_xtal, 0, &sys_pll_conf),
+ FIXED_FACTOR_DIV(CLKID_FCLK_DIV2, "fclk_div2", p_fclk_div, 0, 2),
+ FIXED_FACTOR_DIV(CLKID_FCLK_DIV3, "fclk_div3", p_fclk_div, 0, 3),
+ FIXED_FACTOR_DIV(CLKID_FCLK_DIV4, "fclk_div4", p_fclk_div, 0, 4),
+ FIXED_FACTOR_DIV(CLKID_FCLK_DIV5, "fclk_div5", p_fclk_div, 0, 5),
+ FIXED_FACTOR_DIV(CLKID_FCLK_DIV7, "fclk_div7", p_fclk_div, 0, 7),
+ CPU(MESON8B_REG_SYS_CPU_CNTL1, CLKID_CPUCLK, "a5_clk", p_cpu_clk),
+ COMPOSITE(MESON8B_REG_HHI_MPEG, CLKID_CLK81, "clk81", p_clk81,
+ CLK_SET_RATE_NO_REPARENT | CLK_IGNORE_UNUSED, &clk81_conf),
+ COMPOSITE(MESON8B_REG_MALI, CLKID_MALI, "mali", p_mali,
+ CLK_IGNORE_UNUSED, &mali_conf),
+};
+
+static void __init meson8b_clkc_init(struct device_node *np)
+{
+ void __iomem *clk_base;
+
+ if (!meson_clk_init(np, CLK_NR_CLKS))
+ return;
+
+ /* XTAL */
+ clk_base = of_iomap(np, 0);
+ if (!clk_base) {
+ pr_err("%s: Unable to map xtal base\n", __func__);
+ return;
+ }
+
+ meson_clk_register_clks(&meson8b_xtal_conf, 1, clk_base);
+ iounmap(clk_base);
+
+ /* Generic clocks and PLLs */
+ clk_base = of_iomap(np, 1);
+ if (!clk_base) {
+ pr_err("%s: Unable to map clk base\n", __func__);
+ return;
+ }
+
+ meson_clk_register_clks(meson8b_clk_confs,
+ ARRAY_SIZE(meson8b_clk_confs),
+ clk_base);
+}
+CLK_OF_DECLARE(meson8b_clock, "amlogic,meson8b-clkc", meson8b_clkc_init);
--
1.9.1
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