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 | 12 +++++++++++-
arch/arm/plat-omap/Kconfig | 2 +-
3 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 2669584..23e14c0 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -149,7 +149,11 @@ 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__);
@@ -189,7 +193,7 @@ 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 b7e2d10..c157392 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/omap_device.h>
#include <plat/smartreflex.h>
@@ -101,7 +102,16 @@ static void __init sr_set_nvalues(struct omap_sr_dev_data *dev_data,
}
for (i = 0; i < dev_data->volts_supported; i++) {
- u32 v = omap_ctrl_readl(dev_data->efuse_nvalues_offs[i]);
+ u32 v;
+ if (cpu_is_omap44xx()) {
+ u16 offset = dev_data->efuse_nvalues_offs[i];
+
+ v = omap_ctrl_readb(offset) |
+ omap_ctrl_readb(offset + 1) << 8 |
+ omap_ctrl_readb(offset + 2) << 16;
+ } else {
+ v = omap_ctrl_readl(dev_data->efuse_nvalues_offs[i]);
+ }
dev_data->volt_data[i].sr_nvalue = v;
}
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 7ba92c2..afc6fed 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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