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Commit 9de367fa authored by Tero Kristo's avatar Tero Kristo
Browse files

ARM: OMAP3: PRM: move iva reset to PRM driver 



This is a more proper isolation of the code. Done in preparation of making
PRM an individual driver.

Signed-off-by: default avatarTero Kristo <t-kristo@ti.com>
parent 0efc0f6e

arch/arm/mach-omap2/pm34xx.c

+1 −48
Original line number Diff line number Diff line
@@ -353,53 +353,6 @@ static int omap3_pm_suspend(void) 
#define omap3_pm_suspend NULL

#endif /* CONFIG_SUSPEND */





/**

 * omap3_iva_idle(): ensure IVA is in idle so it can be put into

 *                   retention

 *

 * In cases where IVA2 is activated by bootcode, it may prevent

 * full-chip retention or off-mode because it is not idle.  This

 * function forces the IVA2 into idle state so it can go

 * into retention/off and thus allow full-chip retention/off.

 *

 **/

static void __init omap3_iva_idle(void)

{

	/* ensure IVA2 clock is disabled */

	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);



	/* if no clock activity, nothing else to do */

	if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &

	      OMAP3430_CLKACTIVITY_IVA2_MASK))

		return;



	/* Reset IVA2 */

	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |

			  OMAP3430_RST2_IVA2_MASK |

			  OMAP3430_RST3_IVA2_MASK,

			  OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);



	/* Enable IVA2 clock */

	omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,

			 OMAP3430_IVA2_MOD, CM_FCLKEN);



	/* Set IVA2 boot mode to 'idle' */

	omap3_ctrl_set_iva_bootmode_idle();



	/* Un-reset IVA2 */

	omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);



	/* Disable IVA2 clock */

	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);



	/* Reset IVA2 */

	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |

			  OMAP3430_RST2_IVA2_MASK |

			  OMAP3430_RST3_IVA2_MASK,

			  OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);

}



static void __init omap3_d2d_idle(void)

{

	u16 mask, padconf;
@@ -503,7 +456,7 @@ static void __init prcm_setup_regs(void) 
	/*

	 * We need to idle iva2_pwrdm even on am3703 with no iva2.

	 */

	omap3_iva_idle();

	omap3xxx_prm_iva_idle();



	omap3_d2d_idle();

}

arch/arm/mach-omap2/prm3xxx.c

+45 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include "prm-regbits-34xx.h"

#include "cm3xxx.h"

#include "cm-regbits-34xx.h"

#include "control.h"



static const struct omap_prcm_irq omap3_prcm_irqs[] = {

	OMAP_PRCM_IRQ("wkup",	0,	0),
@@ -329,6 +330,50 @@ static u32 omap3xxx_prm_read_reset_sources(void) 
	return r;

}



/**

 * omap3xxx_prm_iva_idle - ensure IVA is in idle so it can be put into retention

 *

 * In cases where IVA2 is activated by bootcode, it may prevent

 * full-chip retention or off-mode because it is not idle.  This

 * function forces the IVA2 into idle state so it can go

 * into retention/off and thus allow full-chip retention/off.

 */

void omap3xxx_prm_iva_idle(void)

{

	/* ensure IVA2 clock is disabled */

	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);



	/* if no clock activity, nothing else to do */

	if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &

	      OMAP3430_CLKACTIVITY_IVA2_MASK))

		return;



	/* Reset IVA2 */

	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |

				OMAP3430_RST2_IVA2_MASK |

				OMAP3430_RST3_IVA2_MASK,

				OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);



	/* Enable IVA2 clock */

	omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,

			       OMAP3430_IVA2_MOD, CM_FCLKEN);



	/* Set IVA2 boot mode to 'idle' */

	omap3_ctrl_set_iva_bootmode_idle();



	/* Un-reset IVA2 */

	omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);



	/* Disable IVA2 clock */

	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);



	/* Reset IVA2 */

	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |

				OMAP3430_RST2_IVA2_MASK |

				OMAP3430_RST3_IVA2_MASK,

				OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);

}



/* Powerdomain low-level functions */



static int omap3_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)

arch/arm/mach-omap2/prm3xxx.h

+1 −0
Original line number Diff line number Diff line
@@ -163,6 +163,7 @@ extern void omap3xxx_prm_dpll3_reset(void); 
extern int __init omap3xxx_prm_init(void);

extern u32 omap3xxx_prm_get_reset_sources(void);

int omap3xxx_prm_clear_mod_irqs(s16 module, u8 regs, u32 ignore_bits);

void omap3xxx_prm_iva_idle(void);



#endif /* __ASSEMBLER */