Tero Kristo <t-kristo@xxxxxx> writes:
> 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.
Why not do it the right way now?
Also, these new functions need kerneldoc.
Kevin
> 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 ab00736..37f7e12 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)
> {
> @@ -238,6 +242,41 @@ 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,
> @@ -255,4 +294,6 @@ 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 */
--
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