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authorLinus Walleij <linus.walleij@linaro.org>2014-01-10 15:57:27 +0100
committerLinus Walleij <linus.walleij@linaro.org>2014-02-13 11:20:42 +0100
commit09c978bc7bdcfc3db91801454273a4330e1933bf (patch)
treef823a7d102900acb711ec831574a04f3ff36f45c /drivers/clk/versatile
parent9cf31380598466a6ce1d95e68a3f89582eaddc13 (diff)
downloadop-kernel-dev-09c978bc7bdcfc3db91801454273a4330e1933bf.zip
op-kernel-dev-09c978bc7bdcfc3db91801454273a4330e1933bf.tar.gz
ARM: integrator: switch to fetch clocks from device tree
This atomic commit changes the Integrator clock implementation and the machines to register clocks from the device tree and use these instead of the previous hard-coded clocks. In the clock implementation all hard-coded clocks and the special initialization function call goes away, and is replaced by two compatible strings for the two clocks available on the core module. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/clk/versatile')
-rw-r--r--drivers/clk/versatile/clk-integrator.c80
1 files changed, 32 insertions, 48 deletions
diff --git a/drivers/clk/versatile/clk-integrator.c b/drivers/clk/versatile/clk-integrator.c
index bda8967..19864b5 100644
--- a/drivers/clk/versatile/clk-integrator.c
+++ b/drivers/clk/versatile/clk-integrator.c
@@ -10,20 +10,17 @@
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
-#include <linux/platform_data/clk-integrator.h>
-
-#include <mach/hardware.h>
-#include <mach/platform.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include "clk-icst.h"
-/*
- * Implementation of the ARM Integrator/AP and Integrator/CP clock tree.
- * Inspired by portions of:
- * plat-versatile/clock.c and plat-versatile/include/plat/clock.h
- */
+#define INTEGRATOR_HDR_LOCK_OFFSET 0x14
-static const struct icst_params cp_auxvco_params = {
+/* Base offset for the core module */
+static void __iomem *cm_base;
+
+static const struct icst_params cp_auxosc_params = {
.ref = 24000000,
.vco_max = ICST525_VCO_MAX_5V,
.vco_min = ICST525_VCO_MIN,
@@ -35,50 +32,37 @@ static const struct icst_params cp_auxvco_params = {
.idx2s = icst525_idx2s,
};
-static const struct clk_icst_desc __initdata cp_icst_desc = {
- .params = &cp_auxvco_params,
+static const struct clk_icst_desc __initdata cm_auxosc_desc = {
+ .params = &cp_auxosc_params,
.vco_offset = 0x1c,
.lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,
};
-/*
- * integrator_clk_init() - set up the integrator clock tree
- * @is_cp: pass true if it's the Integrator/CP else AP is assumed
- */
-void __init integrator_clk_init(bool is_cp)
+static void __init of_integrator_cm_osc_setup(struct device_node *np)
{
- struct clk *clk;
-
- /* APB clock dummy */
- clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
- clk_register_clkdev(clk, "apb_pclk", NULL);
-
- /* UART reference clock */
- clk = clk_register_fixed_rate(NULL, "uartclk", NULL, CLK_IS_ROOT,
- 14745600);
- clk_register_clkdev(clk, NULL, "uart0");
- clk_register_clkdev(clk, NULL, "uart1");
- if (is_cp)
- clk_register_clkdev(clk, NULL, "mmci");
-
- /* 24 MHz clock */
- clk = clk_register_fixed_rate(NULL, "clk24mhz", NULL, CLK_IS_ROOT,
- 24000000);
- clk_register_clkdev(clk, NULL, "kmi0");
- clk_register_clkdev(clk, NULL, "kmi1");
- if (!is_cp)
- clk_register_clkdev(clk, NULL, "ap_timer");
+ struct clk *clk = ERR_PTR(-EINVAL);
+ const char *clk_name = np->name;
+ const struct clk_icst_desc *desc = &cm_auxosc_desc;
- if (!is_cp)
- return;
+ if (!cm_base) {
+ /* Remap the core module base if not done yet */
+ struct device_node *parent;
- /* 1 MHz clock */
- clk = clk_register_fixed_rate(NULL, "clk1mhz", NULL, CLK_IS_ROOT,
- 1000000);
- clk_register_clkdev(clk, NULL, "sp804");
+ parent = of_get_parent(np);
+ if (!np) {
+ pr_err("no parent on core module clock\n");
+ return;
+ }
+ cm_base = of_iomap(parent, 0);
+ if (!cm_base) {
+ pr_err("could not remap core module base\n");
+ return;
+ }
+ }
- /* ICST VCO clock used on the Integrator/CP CLCD */
- clk = icst_clk_register(NULL, &cp_icst_desc, "icst",
- __io_address(INTEGRATOR_HDR_BASE));
- clk_register_clkdev(clk, NULL, "clcd");
+ clk = icst_clk_register(NULL, desc, clk_name, cm_base);
+ if (!IS_ERR(clk))
+ of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(integrator_cm_auxosc_clk,
+ "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup);
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