OMAP2/3 clock: Extend find_idlest() to pass back idle state value

Current implementation defines clock idle state indicators based on the
cpu information (cpu_is_omap24xx() or cpu_is_omap34xx()) in a system wide
manner. This patch extends the find_idlest() function in clkops to pass
back the idle state indicator for that clock, thus allowing idle state
indicators to be defined on a per clock basis if required.

This is specifically needed on AM35xx devices as the new IPSS clocks
indicates the idle status (0 is idle, 1 is ready) in a way just
opposite to how its handled in OMAP3 (0 is ready, 1 is idle).

Signed-off-by: Ranjith Lohithakshan <ranjithl@ti.com>
[paul@pwsan.com: updated to apply after commit 98c45457 et seq.]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
index ae9e2c82eb6a..49d93efc1911 100644
--- a/arch/arm/mach-omap2/clock34xx.c
+++ b/arch/arm/mach-omap2/clock34xx.c
@@ -47,6 +47,7 @@ struct clk *sdrc_ick_p, *arm_fck_p;
  * @clk: struct clk * being enabled
  * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
  * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
  *
  * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift
  * from the CM_{I,F}CLKEN bit.  Pass back the correct info via
@@ -54,13 +55,15 @@ struct clk *sdrc_ick_p, *arm_fck_p;
  */
 static void omap3430es2_clk_ssi_find_idlest(struct clk *clk,
                                             void __iomem **idlest_reg,
-                                            u8 *idlest_bit)
+                                            u8 *idlest_bit,
+                                            u8 *idlest_val)
 {
         u32 r;
 
         r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
         *idlest_reg = (__force void __iomem *)r;
         *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT;
+        *idlest_val = OMAP34XX_CM_IDLEST_VAL;
 }
 
 const struct clkops clkops_omap3430es2_ssi_wait = {
@@ -75,6 +78,7 @@ const struct clkops clkops_omap3430es2_ssi_wait = {
  * @clk: struct clk * being enabled
  * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
  * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
  *
  * Some OMAP modules on OMAP3 ES2+ chips have both initiator and
  * target IDLEST bits.  For our purposes, we are concerned with the
@@ -85,7 +89,8 @@ const struct clkops clkops_omap3430es2_ssi_wait = {
  */
 static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk,
                                                     void __iomem **idlest_reg,
-                                                    u8 *idlest_bit)
+                                                    u8 *idlest_bit,
+                                                    u8 *idlest_val)
 {
         u32 r;
 
@@ -93,6 +98,7 @@ static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk,
         *idlest_reg = (__force void __iomem *)r;
         /* USBHOST_IDLE has same shift */
         *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT;
+        *idlest_val = OMAP34XX_CM_IDLEST_VAL;
 }
 
 const struct clkops clkops_omap3430es2_dss_usbhost_wait = {
@@ -107,6 +113,7 @@ const struct clkops clkops_omap3430es2_dss_usbhost_wait = {
  * @clk: struct clk * being enabled
  * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
  * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
  *
  * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different
  * shift from the CM_{I,F}CLKEN bit.  Pass back the correct info via
@@ -114,13 +121,15 @@ const struct clkops clkops_omap3430es2_dss_usbhost_wait = {
  */
 static void omap3430es2_clk_hsotgusb_find_idlest(struct clk *clk,
                                                  void __iomem **idlest_reg,
-                                                 u8 *idlest_bit)
+                                                 u8 *idlest_bit,
+                                                 u8 *idlest_val)
 {
         u32 r;
 
         r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
         *idlest_reg = (__force void __iomem *)r;
         *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT;
+        *idlest_val = OMAP34XX_CM_IDLEST_VAL;
 }
 
 const struct clkops clkops_omap3430es2_hsotgusb_wait = {