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Commit 1e3d0d2b authored by Thara Gopinath's avatar Thara Gopinath Committed by Paul Walmsley
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OMAP2/3 PM: Adding powerdomain APIs for reading the next logic and mem state 



This patch adds APIs pwrdm_read_logic_retst and
pwrdm_read_mem_retst for reading the next programmed
logic and memory state a powerdomain is to hit in event
of the next power domain state being retention.
These are needed for OSWR support.

Signed-off-by: default avatarThara Gopinath <thara@ti.com>
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
parent b024b542

arch/arm/mach-omap2/powerdomain.c

+73 −0
Original line number Diff line number Diff line
@@ -678,6 +678,29 @@ int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) 
					OMAP3430_LASTLOGICSTATEENTERED);

}



/**

 * pwrdm_read_logic_retst - get next powerdomain logic power state

 * @pwrdm: struct powerdomain * to get next logic power state

 *

 * Return the powerdomain pwrdm's logic power state.  Returns -EINVAL

 * if the powerdomain pointer is null or returns the next logic

 * power state upon success.

 */

int pwrdm_read_logic_retst(struct powerdomain *pwrdm)

{

	if (!pwrdm)

		return -EINVAL;



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	return prm_read_mod_bits_shift(pwrdm->prcm_offs, pwrstctrl_reg_offs,

					OMAP3430_LOGICSTATEST);

}



/**

 * pwrdm_read_mem_pwrst - get current memory bank power state

 * @pwrdm: struct powerdomain * to get current memory bank power state
@@ -784,6 +807,56 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) 
					OMAP3430_PM_PREPWSTST, m);

}



/**

 * pwrdm_read_mem_retst - get next memory bank power state

 * @pwrdm: struct powerdomain * to get mext memory bank power state

 * @bank: memory bank number (0-3)

 *

 * Return the powerdomain pwrdm's next memory power state for bank

 * x.  Returns -EINVAL if the powerdomain pointer is null, -EEXIST if

 * the target memory bank does not exist or is not controllable, or

 * returns the next memory power state upon success.

 */

int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;



	if (!pwrdm)

		return -EINVAL;



	if (pwrdm->banks < (bank + 1))

		return -EEXIST;



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	switch (bank) {

	case 0:

		m = OMAP_MEM0_RETSTATE_MASK;

		break;

	case 1:

		m = OMAP_MEM1_RETSTATE_MASK;

		break;

	case 2:

		m = OMAP_MEM2_RETSTATE_MASK;

		break;

	case 3:

		m = OMAP_MEM3_RETSTATE_MASK;

		break;

	case 4:

		m = OMAP_MEM4_RETSTATE_MASK;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}



	return prm_read_mod_bits_shift(pwrdm->prcm_offs,

					pwrstctrl_reg_offs, m);

}



/**

 * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm

 * @pwrdm: struct powerdomain * to clear

arch/arm/plat-omap/include/plat/powerdomain.h

+2 −0
Original line number Diff line number Diff line
@@ -137,8 +137,10 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst); 


int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);

int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);

int pwrdm_read_logic_retst(struct powerdomain *pwrdm);

int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);

int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);

int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank);



int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);

int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);