[PATCH v2 07/10] clk: berlin: add core clock driver for BG2Q
Sebastian Hesselbarth
sebastian.hesselbarth at gmail.com
Wed May 14 13:15:18 PDT 2014
From: Alexandre Belloni <alexandre.belloni at free-electrons.com>
This driver deals with the core clocks found on Marvell Berlin BG2Q. For the
shared register dividers, make use of the corresponding driver and add some
single clock muxes and gates for the rest.
Signed-off-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>
---
Changelog:
v1->v2:
- initial version
Cc: Mike Turquette <mturquette at linaro.org>
Cc: Alexandre Belloni <alexandre.belloni at free-electrons.com>
Cc: Jisheng Zhang <jszhang at marvell.com>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
---
drivers/clk/berlin/Makefile | 1 +
drivers/clk/berlin/bg2q.c | 269 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 270 insertions(+)
create mode 100644 drivers/clk/berlin/bg2q.c
diff --git a/drivers/clk/berlin/Makefile b/drivers/clk/berlin/Makefile
index 2b33e1e74503..2a36ab710a07 100644
--- a/drivers/clk/berlin/Makefile
+++ b/drivers/clk/berlin/Makefile
@@ -1,3 +1,4 @@
obj-y += berlin2-avpll.o berlin2-pll.o berlin2-div.o
obj-$(CONFIG_MACH_BERLIN_BG2) += bg2.o
obj-$(CONFIG_MACH_BERLIN_BG2CD) += bg2.o
+obj-$(CONFIG_MACH_BERLIN_BG2Q) += bg2q.o
diff --git a/drivers/clk/berlin/bg2q.c b/drivers/clk/berlin/bg2q.c
new file mode 100644
index 000000000000..df5a4ce5eb87
--- /dev/null
+++ b/drivers/clk/berlin/bg2q.c
@@ -0,0 +1,269 @@
+/*
+ * Copyright (c) 2014 Marvell Technology Group Ltd.
+ *
+ * Alexandre Belloni <alexandre.belloni at free-electrons.com>
+ * Sebastian Hesselbarth <sebastian.hesselbarth at gmail.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/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include "berlin2-div.h"
+
+struct bg2_gate_data {
+ const char *name;
+ const char *parent_name;
+ u8 bit_idx;
+ unsigned long flags;
+};
+
+#define REG_CLKENABLE 0x00
+#define REG_CLKSELECT0 0x04
+#define REG_CLKSELECT1 0x08
+#define REG_CLKSELECT2 0x0c
+#define REG_CLKSWITCH0 0x10
+#define REG_CLKSWITCH1 0x14
+
+#define MAX_CLKS 24
+
+static DEFINE_SPINLOCK(lock);
+static struct clk *clks[MAX_CLKS];
+static struct clk_onecell_data clk_data;
+
+static const struct berlin2_div_data bg2q_divs[] __initconst = {
+ {
+ .name = "sys",
+ .flags = CLK_IGNORE_UNUSED,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 0),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT0, 0),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT0, 3),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 3),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 4),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 5),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "drmfigo",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 17),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT0, 6),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT0, 9),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 6),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 7),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 8),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "cfg",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 1),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT0, 12),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT0, 15),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 9),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 10),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 11),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "gfx2d",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 4),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT0, 18),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT0, 21),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 12),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 13),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 14),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "zsp",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 6),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT0, 24),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT0, 27),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 15),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 16),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 17),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "perif",
+ .flags = CLK_IGNORE_UNUSED,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 7),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT1, 0),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT1, 3),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 18),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 19),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 20),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "pcube",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 2),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT1, 6),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT1, 9),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 21),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 22),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 23),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "vscope",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 3),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT1, 12),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT1, 15),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 24),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 25),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 26),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "nfc_ecc",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 19),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT1, 18),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT1, 21),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 27),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 28),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 29),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "vpp",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 21),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT1, 24),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT1, 27),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 30),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 31),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 0),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+ {
+ .name = "app",
+ .flags = 0,
+ .map = {
+ BERLIN2_DIV_GATE(REG_CLKENABLE, 20),
+ BERLIN2_PLL_SELECT(REG_CLKSELECT2, 0),
+ BERLIN2_DIV_SELECT(REG_CLKSELECT2, 3),
+ BERLIN2_PLL_SWITCH(REG_CLKSWITCH1, 1),
+ BERLIN2_DIV_SWITCH(REG_CLKSWITCH1, 2),
+ BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 3),
+ },
+ .div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
+ },
+};
+
+static const struct bg2_gate_data bg2q_gates[] __initconst = {
+ { "gfx2daxi", "perif", 5 },
+ { "geth0", "perif", 8 },
+ { "sata", "perif", 9 },
+ { "ahbapb", "perif", 10, CLK_IGNORE_UNUSED },
+ { "usb0", "perif", 11 },
+ { "usb1", "perif", 12 },
+ { "usb2", "perif", 13 },
+ { "usb3", "perif", 14 },
+ { "pbridge", "perif", 15, CLK_IGNORE_UNUSED },
+ { "sdio", "perif", 16 },
+ { "nfc", "perif", 18 },
+ { "smemc", "perif", 19 },
+ { "pcie", "perif", 22 },
+};
+
+static void __init berlin2q_core_clock_of_setup(struct device_node *np)
+{
+ const struct berlin2_div_data *data;
+ const char *parent_names[9];
+ void __iomem *base;
+ int n, nclk = 0;
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ pr_err("%s: Unable to map register base\n", np->full_name);
+ return;
+ }
+
+ /*
+ * TODO: reference clock bypass switches: memPLLSWBypass, cpuPLLSWBypass
+ * and sysPLLSWBypass are missing
+ */
+
+ /* TODO: Once BG2Q AVPLL are added, add AVPLLB[4-7] as parents*/
+ parent_names[0] = "syspll";
+ for (n = 0; n < ARRAY_SIZE(bg2q_divs); n++) {
+ data = &bg2q_divs[n];
+ clks[n] = berlin2_div_register(&data->map, base, data->name,
+ data->div_flags, parent_names, 5, data->flags, &lock);
+ }
+ nclk += n;
+
+ /* clock gate cells */
+ for (n = 0; n < ARRAY_SIZE(bg2q_gates); n++) {
+ const struct bg2_gate_data *gd = &bg2q_gates[n];
+
+ clks[nclk + n] = clk_register_gate(NULL, gd->name,
+ gd->parent_name, gd->flags, base + REG_CLKENABLE,
+ gd->bit_idx, 0, &lock);
+ }
+ nclk += n;
+
+ /* check for errors on leaf clocks */
+ for (n = 0; n < nclk; n++) {
+ if (!IS_ERR(clks[n]))
+ continue;
+
+ pr_err("%s: Unable to register leaf clock %d\n",
+ np->full_name, n);
+ goto core_clock_fail;
+ }
+
+ /* register clk-provider */
+ clk_data.clks = clks;
+ clk_data.clk_num = MAX_CLKS;
+ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+ return;
+
+core_clock_fail:
+ iounmap(base);
+}
+CLK_OF_DECLARE(berlin2q_coreclk, "marvell,berlin2q-core-clocks",
+ berlin2q_core_clock_of_setup);
--
1.9.1
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