msm: acpuclock: Implement acpuclock APIs through function pointers
Create a generic wrapper acpuclock driver in acpuclock.c to call
SoC-specific function pointer API implementations. With the
exception of iomap conflicts, this should allow multiple acpuclock
driver implementations to be compiled into the same kernel binary.
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
Conflicts:
arch/arm/mach-msm/acpuclock-7201.c
arch/arm/mach-msm/board-msm8960.c
diff --git a/arch/arm/mach-msm/acpuclock.c b/arch/arm/mach-msm/acpuclock.c
new file mode 100644
index 0000000..4aced18
--- /dev/null
+++ b/arch/arm/mach-msm/acpuclock.c
@@ -0,0 +1,75 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#include <linux/cpu.h>
+#include "acpuclock.h"
+
+static struct acpuclk_data *acpuclk_data;
+
+unsigned long acpuclk_get_rate(int cpu)
+{
+ if (!acpuclk_data->get_rate)
+ return 0;
+
+ return acpuclk_data->get_rate(cpu);
+}
+
+int acpuclk_set_rate(int cpu, unsigned long rate, enum setrate_reason reason)
+{
+ if (!acpuclk_data->set_rate)
+ return 0;
+
+ return acpuclk_data->set_rate(cpu, rate, reason);
+}
+
+uint32_t acpuclk_get_switch_time(void)
+{
+ return acpuclk_data->switch_time_us;
+}
+
+unsigned long acpuclk_power_collapse(void)
+{
+ unsigned long rate = acpuclk_get_rate(smp_processor_id());
+ acpuclk_set_rate(smp_processor_id(), acpuclk_data->power_collapse_khz,
+ SETRATE_PC);
+ return rate;
+}
+
+unsigned long acpuclk_wait_for_irq(void)
+{
+ unsigned long rate = acpuclk_get_rate(smp_processor_id());
+ acpuclk_set_rate(smp_processor_id(), acpuclk_data->wait_for_irq_khz,
+ SETRATE_SWFI);
+ return rate;
+}
+
+void __init acpuclk_register(struct acpuclk_data *data)
+{
+ acpuclk_data = data;
+}
+
+int __init acpuclk_init(struct acpuclk_platform_data *pdata)
+{
+ int rc;
+
+ if (!pdata->init)
+ return -EINVAL;
+
+ rc = pdata->init(pdata);
+ if (rc)
+ return rc;
+
+ if (!acpuclk_data)
+ return -ENODEV;
+
+ return 0;
+}