This patch extends the smartreflex framework to support
OMAP4. The changes are minor like compiling smartreflex Kconfig
option for OMAP4 also, and a couple of OMAP4 checks in
the smartreflex framework.
The change in sr_device.c where new logic has to be introduced
for reading the efuse registers is due to the fact that in OMAP4
the efuse registers are 24 bit aligned. A __raw_readl will
fail for non-32 bit aligned address and hence the 8-bit read
and shift.
Signed-off-by: Thara Gopinath <thara@xxxxxx>
---
arch/arm/mach-omap2/smartreflex.c | 8 ++++++--
arch/arm/mach-omap2/sr_device.c | 15 +++++++++++++--
arch/arm/plat-omap/Kconfig | 2 +-
3 files changed, 20 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index b5a7878..e41be58 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -152,7 +152,11 @@ static void sr_set_clk_length(struct omap_sr *sr)
struct clk *sys_ck;
u32 sys_clk_speed;
- sys_ck = clk_get(NULL, "sys_ck");
+ if (cpu_is_omap34xx())
+ sys_ck = clk_get(NULL, "sys_ck");
+ else
+ sys_ck = clk_get(NULL, "sys_clkin_ck");
+
if (IS_ERR(sys_ck)) {
dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n",
__func__);
@@ -192,7 +196,7 @@ static void sr_set_regfields(struct omap_sr *sr)
* file or pmic specific data structure. In that case these structure
* fields will have to be populated using the pdata or pmic structure.
*/
- if (cpu_is_omap34xx()) {
+ if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
sr->err_weight = OMAP3430_SR_ERRWEIGHT;
sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
sr->accum_data = OMAP3430_SR_ACCUMDATA;
diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c
index 606da59..ef28d63 100644
--- a/arch/arm/mach-omap2/sr_device.c
+++ b/arch/arm/mach-omap2/sr_device.c
@@ -20,6 +20,7 @@
#include <linux/err.h>
#include <linux/slab.h>
+#include <linux/io.h>
#include <plat/control.h>
#include <plat/omap_device.h>
@@ -98,9 +99,19 @@ static void __init sr_set_nvalues(struct omap_sr_dev_data *dev_data,
dev_data->senpenable_shift);
}
- for (i = 0; i < dev_data->volts_supported; i++)
- dev_data->volt_data[i].sr_nvalue = omap_ctrl_readl(
+ for (i = 0; i < dev_data->volts_supported; i++) {
+ if (cpu_is_omap44xx()) {
+ u16 offset = dev_data->efuse_nvalues_offs[i];
+
+ dev_data->volt_data[i].sr_nvalue =
+ omap_ctrl_readb(offset) |
+ omap_ctrl_readb(offset + 1) << 8 |
+ omap_ctrl_readb(offset + 2) << 16;
+ } else {
+ dev_data->volt_data[i].sr_nvalue = omap_ctrl_readl(
dev_data->efuse_nvalues_offs[i]);
+ }
+ }
}
#endif
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 89dc30e..67b1395 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -37,7 +37,7 @@ config OMAP_DEBUG_LEDS
config OMAP_SMARTREFLEX
bool "SmartReflex support"
- depends on ARCH_OMAP3 && PM
+ depends on (ARCH_OMAP3 || ARCH_OMAP4) && PM
help
Say Y if you want to enable SmartReflex.
--
1.7.0.4
--
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