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pmdomain: mediatek: Create bus protection operation functions

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Separate the register access used for bus protection enable/disable into
their own functions. These will be used later for WAY_EN support.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Tested-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/20230918093751.1188668-5-msp@baylibre.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Markus Schneider-Pargmann 2023-09-18 11:37:48 +02:00 committed by Ulf Hansson
parent ae442ba85a
commit 2ec81379ea
1 changed files with 39 additions and 29 deletions
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68
drivers/pmdomain/mediatek/mtk-pm-domains.c
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@ -118,26 +118,50 @@ static int scpsys_sram_disable(struct scpsys_domain *pd)
MTK_POLL_TIMEOUT);
}
static int scpsys_bus_protect_clear(const struct scpsys_bus_prot_data *bpd,
struct regmap *regmap)
{
u32 sta_mask = bpd->bus_prot_sta_mask;
u32 val;
if (bpd->flags & BUS_PROT_REG_UPDATE)
regmap_clear_bits(regmap, bpd->bus_prot_clr, bpd->bus_prot_set_clr_mask);
else
regmap_write(regmap, bpd->bus_prot_clr, bpd->bus_prot_set_clr_mask);
if (bpd->flags & BUS_PROT_IGNORE_CLR_ACK)
return 0;
return regmap_read_poll_timeout(regmap, bpd->bus_prot_sta,
val, !(val & sta_mask),
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
static int scpsys_bus_protect_set(const struct scpsys_bus_prot_data *bpd,
struct regmap *regmap)
{
u32 sta_mask = bpd->bus_prot_sta_mask;
u32 val;
if (bpd->flags & BUS_PROT_REG_UPDATE)
regmap_set_bits(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask);
else
regmap_write(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask);
return regmap_read_poll_timeout(regmap, bpd->bus_prot_sta,
val, (val & sta_mask) == sta_mask,
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
static int _scpsys_bus_protect_enable(const struct scpsys_bus_prot_data *bpd, struct regmap *regmap)
{
int i, ret;
for (i = 0; i < SPM_MAX_BUS_PROT_DATA; i++) {
u32 set_clr_mask = bpd[i].bus_prot_set_clr_mask;
u32 sta_mask = bpd[i].bus_prot_sta_mask;
u32 val;
if (!set_clr_mask)
if (!bpd[i].bus_prot_set_clr_mask)
break;
if (bpd[i].flags & BUS_PROT_REG_UPDATE)
regmap_set_bits(regmap, bpd[i].bus_prot_set, set_clr_mask);
else
regmap_write(regmap, bpd[i].bus_prot_set, set_clr_mask);
ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta,
val, (val & sta_mask) == sta_mask,
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
ret = scpsys_bus_protect_set(&bpd[i], regmap);
if (ret)
return ret;
}
@ -162,24 +186,10 @@ static int _scpsys_bus_protect_disable(const struct scpsys_bus_prot_data *bpd,
int i, ret;
for (i = SPM_MAX_BUS_PROT_DATA - 1; i >= 0; i--) {
u32 set_clr_mask = bpd[i].bus_prot_set_clr_mask;
u32 sta_mask = bpd[i].bus_prot_sta_mask;
u32 val;
if (!set_clr_mask)
if (!bpd[i].bus_prot_set_clr_mask)
continue;
if (bpd[i].flags & BUS_PROT_REG_UPDATE)
regmap_clear_bits(regmap, bpd[i].bus_prot_clr, set_clr_mask);
else
regmap_write(regmap, bpd[i].bus_prot_clr, set_clr_mask);
if (bpd[i].flags & BUS_PROT_IGNORE_CLR_ACK)
continue;
ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta,
val, !(val & sta_mask),
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
ret = scpsys_bus_protect_clear(&bpd[i], regmap);
if (ret)
return ret;
}