msm: acpuclock: Convert acpuclock drivers into platform drivers
This allows the acpuclock drivers to initialize in a manner consistent
with other platform drivers used on MSM chipsets.
For targets without specific probe order dependencies involving
acpuclock, platform_device_register() is called during init_machine()
in the target's board file. platform_driver_probe() is then called
in a 'device' initcall. This is the case for:
acpuclock-8x60, acpuclock-8960, acpuclock-9615, acpuclock-fsm9xxx
For the other targets, platform_driver_register() is called in a
postcore initcall and the driver probes as a result of calling
platform_device_register() during init_machine(). This is required
for the following drivers:
acpuclock-7627, acpuclock-7x30, acpuclock-8x50
Specifically, these three drivers are used on targets where the CPUs
may be running from disableable clock sources that are shared with
other peripheral clocks. We must make sure that acpuclock has a
chance to assert a vote for the clock source that the CPU is currently
running from before other drivers using that same source have a chance
to disable it.
Change-Id: Ieec39722ebd757ab90057fd10ccc9a8786f0c8cb
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
diff --git a/arch/arm/mach-msm/acpuclock-7627.c b/arch/arm/mach-msm/acpuclock-7627.c
index 7c2c556..f9ff226 100644
--- a/arch/arm/mach-msm/acpuclock-7627.c
+++ b/arch/arm/mach-msm/acpuclock-7627.c
@@ -18,6 +18,7 @@
#include <linux/version.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/string.h>
@@ -27,6 +28,8 @@
#include <linux/mutex.h>
#include <linux/io.h>
#include <linux/sort.h>
+#include <linux/platform_device.h>
+
#include <mach/board.h>
#include <mach/msm_iomap.h>
#include <mach/socinfo.h>
@@ -402,7 +405,7 @@
#ifdef CONFIG_CPU_FREQ_MSM
static struct cpufreq_frequency_table freq_table[NR_CPUS][20];
-static void __init cpufreq_table_init(void)
+static void __devinit cpufreq_table_init(void)
{
int cpu;
for_each_possible_cpu(cpu) {
@@ -693,7 +696,7 @@
return rc;
}
-static void __init acpuclk_hw_init(void)
+static void __devinit acpuclk_hw_init(void)
{
struct clkctl_acpu_speed *speed;
uint32_t div, sel, reg_clksel;
@@ -775,7 +778,7 @@
* Clock driver initialization
*---------------------------------------------------------------------------*/
#define MHZ 1000000
-static void __init select_freq_plan(void)
+static void __devinit select_freq_plan(void)
{
unsigned long pll_mhz[ACPU_PLL_END];
struct pll_freq_tbl_map *t;
@@ -835,7 +838,7 @@
* Hardware requires the CPU to be dropped to less than MAX_WAIT_FOR_IRQ_KHZ
* before entering a wait for irq low-power mode. Find a suitable rate.
*/
-static unsigned long __init find_wait_for_irq_khz(void)
+static unsigned long __devinit find_wait_for_irq_khz(void)
{
unsigned long found_khz = 0;
int i;
@@ -847,7 +850,7 @@
return found_khz;
}
-static void __init lpj_init(void)
+static void __devinit lpj_init(void)
{
int i = 0, cpu;
const struct clkctl_acpu_speed *base_clk = drv_state.current_speed;
@@ -868,7 +871,7 @@
}
}
-static void __init precompute_stepping(void)
+static void __devinit precompute_stepping(void)
{
int i, step_idx;
@@ -909,7 +912,7 @@
}
}
-static void __init print_acpu_freq_tbl(void)
+static void __devinit print_acpu_freq_tbl(void)
{
struct clkctl_acpu_speed *t;
short down_idx[ACPU_PLL_END];
@@ -947,15 +950,17 @@
.switch_time_us = 50,
};
-static int __init acpuclk_7627_init(struct acpuclk_soc_data *soc_data)
+static int __devinit acpuclk_7627_probe(struct platform_device *pdev)
{
+ const struct acpuclk_pdata *pdata = pdev->dev.platform_data;
+
pr_info("%s()\n", __func__);
drv_state.ebi1_clk = clk_get(NULL, "ebi1_acpu_clk");
BUG_ON(IS_ERR(drv_state.ebi1_clk));
mutex_init(&drv_state.lock);
- drv_state.max_speed_delta_khz = soc_data->max_speed_delta_khz;
+ drv_state.max_speed_delta_khz = pdata->max_speed_delta_khz;
select_freq_plan();
acpuclk_7627_data.wait_for_irq_khz = find_wait_for_irq_khz();
precompute_stepping();
@@ -970,23 +975,16 @@
return 0;
}
-struct acpuclk_soc_data acpuclk_7x27_soc_data __initdata = {
- .max_speed_delta_khz = 400000,
- .init = acpuclk_7627_init,
+static struct platform_driver acpuclk_7627_driver = {
+ .probe = acpuclk_7627_probe,
+ .driver = {
+ .name = "acpuclk-7627",
+ .owner = THIS_MODULE,
+ },
};
-struct acpuclk_soc_data acpuclk_7x27a_soc_data __initdata = {
- .max_speed_delta_khz = 400000,
- .init = acpuclk_7627_init,
-};
-
-struct acpuclk_soc_data acpuclk_7x27aa_soc_data __initdata = {
- .max_speed_delta_khz = 504000,
- .init = acpuclk_7627_init,
-};
-
-struct acpuclk_soc_data acpuclk_8625_soc_data __initdata = {
- /* TODO: Need to update speed delta from H/w Team */
- .max_speed_delta_khz = 604800,
- .init = acpuclk_7627_init,
-};
+static int __init acpuclk_7627_init(void)
+{
+ return platform_driver_register(&acpuclk_7627_driver);
+}
+postcore_initcall(acpuclk_7627_init);