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authorRanjith Lohithakshan <ranjithl@ti.com>2010-02-24 22:05:54 +0300
committerPaul Walmsley <paul@pwsan.com>2010-02-24 22:05:54 +0300
commit419cc97d3678f0fca5e60b3853dd9c1371f67805 (patch)
treea3997e3f9ad52abf927597f8e241fb6dfb02ab00 /arch/arm/mach-omap2/clock34xx.c
parentcde08f81b1d7952ae00c4be2165da629ef985522 (diff)
downloadlinux-419cc97d3678f0fca5e60b3853dd9c1371f67805.tar.xz
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>
Diffstat (limited to 'arch/arm/mach-omap2/clock34xx.c')
-rw-r--r--arch/arm/mach-omap2/clock34xx.c15
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 = {