From: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
L3INIT powerdomain has USB HOST and USB TLL modules which support
hardware save-and-restore (HW SAR) mechanism.
This patch updates the L3INIT power domain to mark them as capable
of doing H/w save and restore and provides functions to do them
explicitly.
Note: Eventually, these custom function implementation will be
abstracted and might be done in hwmod or in other layer.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Signed-off-by: Tero Kristo <t-kristo@xxxxxx>
---
arch/arm/mach-omap2/powerdomain44xx.c | 41 +++++++++++++++++++++++++++
arch/arm/mach-omap2/powerdomains44xx_data.c | 2 +-
2 files changed, 42 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/powerdomain44xx.c b/arch/arm/mach-omap2/powerdomain44xx.c
index 601325b..9bfb8a0 100644
--- a/arch/arm/mach-omap2/powerdomain44xx.c
+++ b/arch/arm/mach-omap2/powerdomain44xx.c
@@ -23,6 +23,10 @@
#include "prm44xx.h"
#include "prminst44xx.h"
#include "prm-regbits-44xx.h"
+#include "cm-regbits-44xx.h"
+#include "prcm44xx.h"
+#include "cm2_44xx.h"
+#include "cminst44xx.h"
static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
{
@@ -208,6 +212,41 @@ static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
return 0;
}
+static int omap4_pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
+{
+ /*
+ * FIXME: This should be fixed right way by moving it into HWMOD
+ * or clock framework since sar control is moved to module level
+ */
+ omap4_cminst_rmw_inst_reg_bits(OMAP4430_SAR_MODE_MASK,
+ 1 << OMAP4430_SAR_MODE_SHIFT, OMAP4430_CM2_PARTITION,
+ OMAP4430_CM2_L3INIT_INST,
+ OMAP4_CM_L3INIT_USB_HOST_CLKCTRL_OFFSET);
+ omap4_cminst_rmw_inst_reg_bits(OMAP4430_SAR_MODE_MASK,
+ 1 << OMAP4430_SAR_MODE_SHIFT, OMAP4430_CM2_PARTITION,
+ OMAP4430_CM2_L3INIT_INST,
+ OMAP4_CM_L3INIT_USB_TLL_CLKCTRL_OFFSET);
+ return 0;
+}
+
+static int omap4_pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
+{
+ /*
+ * FIXME: This should be fixed right way by moving it into HWMOD
+ * or clock framework since sar control is moved to module level
+ */
+ omap4_cminst_rmw_inst_reg_bits(OMAP4430_SAR_MODE_MASK,
+ 0 << OMAP4430_SAR_MODE_SHIFT, OMAP4430_CM2_PARTITION,
+ OMAP4430_CM2_L3INIT_INST,
+ OMAP4_CM_L3INIT_USB_HOST_CLKCTRL_OFFSET);
+ omap4_cminst_rmw_inst_reg_bits(OMAP4430_SAR_MODE_MASK,
+ 0 << OMAP4430_SAR_MODE_SHIFT, OMAP4430_CM2_PARTITION,
+ OMAP4430_CM2_L3INIT_INST,
+ OMAP4_CM_L3INIT_USB_TLL_CLKCTRL_OFFSET);
+
+ return 0;
+}
+
struct pwrdm_ops omap4_pwrdm_operations = {
.pwrdm_set_next_pwrst = omap4_pwrdm_set_next_pwrst,
.pwrdm_read_next_pwrst = omap4_pwrdm_read_next_pwrst,
@@ -223,4 +262,6 @@ struct pwrdm_ops omap4_pwrdm_operations = {
.pwrdm_set_mem_onst = omap4_pwrdm_set_mem_onst,
.pwrdm_set_mem_retst = omap4_pwrdm_set_mem_retst,
.pwrdm_wait_transition = omap4_pwrdm_wait_transition,
+ .pwrdm_enable_hdwr_sar = omap4_pwrdm_enable_hdwr_sar,
+ .pwrdm_disable_hdwr_sar = omap4_pwrdm_disable_hdwr_sar,
};
diff --git a/arch/arm/mach-omap2/powerdomains44xx_data.c b/arch/arm/mach-omap2/powerdomains44xx_data.c
index 704664c..d8701ce 100644
--- a/arch/arm/mach-omap2/powerdomains44xx_data.c
+++ b/arch/arm/mach-omap2/powerdomains44xx_data.c
@@ -276,7 +276,7 @@ static struct powerdomain l3init_44xx_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRSTS_ON, /* l3init_bank1 */
},
- .flags = PWRDM_HAS_LOWPOWERSTATECHANGE,
+ .flags = PWRDM_HAS_LOWPOWERSTATECHANGE | PWRDM_HAS_HDWR_SAR,
};
/* l4per_44xx_pwrdm: Target peripherals power domain */
--
1.7.4.1
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
