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authorLinus Walleij <linus.walleij@linaro.org>2012-11-20 22:39:49 +0100
committerMike Turquette <mturquette@linaro.org>2012-11-21 11:02:44 -0800
commit70ee65771424829fd092a1df9afcc7e24c94004b (patch)
tree0e25e304610039efe35410db2b6a930c9412690e /drivers/clk/versatile
parent7a9ad671ac0a0ec2fc86887a9416f837c0cfb801 (diff)
downloadvexpress-lsk-70ee65771424829fd092a1df9afcc7e24c94004b.tar.gz
clk: move IM-PD1 clocks to drivers/clk
The ARM IM-PD1 add-on module has a few clock of its own, let's move also these down to the drivers/clk/versatile driver dir and get rid of any remaining oldschool Integrator clocks. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk/versatile')
-rw-r--r--drivers/clk/versatile/Makefile1
-rw-r--r--drivers/clk/versatile/clk-impd1.c97
2 files changed, 98 insertions, 0 deletions
diff --git a/drivers/clk/versatile/Makefile b/drivers/clk/versatile/Makefile
index c776053e5bb..ec3b88fe3e6 100644
--- a/drivers/clk/versatile/Makefile
+++ b/drivers/clk/versatile/Makefile
@@ -1,6 +1,7 @@
# Makefile for Versatile-specific clocks
obj-$(CONFIG_ICST) += clk-icst.o
obj-$(CONFIG_ARCH_INTEGRATOR) += clk-integrator.o
+obj-$(CONFIG_INTEGRATOR_IMPD1) += clk-impd1.o
obj-$(CONFIG_ARCH_REALVIEW) += clk-realview.o
obj-$(CONFIG_ARCH_VEXPRESS) += clk-vexpress.o
obj-$(CONFIG_VEXPRESS_CONFIG) += clk-vexpress-osc.o
diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
new file mode 100644
index 00000000000..369139af2a3
--- /dev/null
+++ b/drivers/clk/versatile/clk-impd1.c
@@ -0,0 +1,97 @@
+/*
+ * Clock driver for the ARM Integrator/IM-PD1 board
+ * Copyright (C) 2012 Linus Walleij
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_data/clk-integrator.h>
+
+#include <mach/impd1.h>
+
+#include "clk-icst.h"
+
+struct impd1_clk {
+ struct clk *vcoclk;
+ struct clk *uartclk;
+ struct clk_lookup *clks[3];
+};
+
+static struct impd1_clk impd1_clks[4];
+
+/*
+ * There are two VCO's on the IM-PD1 but only one is used by the
+ * kernel, that is why we are only implementing the control of
+ * IMPD1_OSC1 here.
+ */
+
+static const struct icst_params impd1_vco_params = {
+ .ref = 24000000, /* 24 MHz */
+ .vco_max = ICST525_VCO_MAX_3V,
+ .vco_min = ICST525_VCO_MIN,
+ .vd_min = 12,
+ .vd_max = 519,
+ .rd_min = 3,
+ .rd_max = 120,
+ .s2div = icst525_s2div,
+ .idx2s = icst525_idx2s,
+};
+
+static const struct clk_icst_desc impd1_icst1_desc = {
+ .params = &impd1_vco_params,
+ .vco_offset = IMPD1_OSC1,
+ .lock_offset = IMPD1_LOCK,
+};
+
+/**
+ * integrator_impd1_clk_init() - set up the integrator clock tree
+ * @base: base address of the logic module (LM)
+ * @id: the ID of this LM
+ */
+void integrator_impd1_clk_init(void __iomem *base, unsigned int id)
+{
+ struct impd1_clk *imc;
+ struct clk *clk;
+ int i;
+
+ if (id > 3) {
+ pr_crit("no more than 4 LMs can be attached\n");
+ return;
+ }
+ imc = &impd1_clks[id];
+
+ clk = icst_clk_register(NULL, &impd1_icst1_desc, base);
+ imc->vcoclk = clk;
+ imc->clks[0] = clkdev_alloc(clk, NULL, "lm%x:01000", id);
+
+ /* UART reference clock */
+ clk = clk_register_fixed_rate(NULL, "uartclk", NULL, CLK_IS_ROOT,
+ 14745600);
+ imc->uartclk = clk;
+ imc->clks[1] = clkdev_alloc(clk, NULL, "lm%x:00100", id);
+ imc->clks[2] = clkdev_alloc(clk, NULL, "lm%x:00200", id);
+
+ for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
+ clkdev_add(imc->clks[i]);
+}
+
+void integrator_impd1_clk_exit(unsigned int id)
+{
+ int i;
+ struct impd1_clk *imc;
+
+ if (id > 3)
+ return;
+ imc = &impd1_clks[id];
+
+ for (i = 0; i < ARRAY_SIZE(imc->clks); i++)
+ clkdev_drop(imc->clks[i]);
+ clk_unregister(imc->uartclk);
+ clk_unregister(imc->vcoclk);
+}