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soc: imx: gpcv2: handle additional power-down bits in handshake register

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Some of the i.MX8MQ domains have an additional control bit in the PU
handshake (HSK) register. Documentation about this bit is a bit sparse
at the moment, but it seems that it controls a power-down request to
the AMBA domain bridge (ADB-400) attached to those domains.

As the documentation doesn't desribe the usage of this bit yet, handle
it in the same way as done in the ATF implementation.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Lucas Stach 2018-12-17 16:31:51 +01:00 committed by Shawn Guo
parent bfeffd1552
commit b798d5a1b0
1 changed files with 15 additions and 1 deletions
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16
drivers/soc/imx/gpcv2.c
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@ -65,6 +65,12 @@
#define GPC_M4_PU_PDN_FLG 0x1bc
#define GPC_PU_PWRHSK 0x1fc
#define IMX8M_GPU_HSK_PWRDNREQN BIT(6)
#define IMX8M_VPU_HSK_PWRDNREQN BIT(5)
#define IMX8M_DISP_HSK_PWRDNREQN BIT(4)
/*
* The PGC offset values in Reference Manual
* (Rev. 1, 01/2018 and the older ones) GPC chapter's
@ -102,6 +108,7 @@ struct imx_pgc_domain {
const struct {
u32 pxx;
u32 map;
u32 hsk;
} bits;
const int voltage;
@ -142,6 +149,10 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
regmap_update_bits(domain->regmap, GPC_PGC_CTRL(domain->pgc),
GPC_PGC_CTRL_PCR, GPC_PGC_CTRL_PCR);
if (domain->bits.hsk)
regmap_update_bits(domain->regmap, GPC_PU_PWRHSK,
domain->bits.hsk, on ? domain->bits.hsk : 0);
regmap_update_bits(domain->regmap, offset,
domain->bits.pxx, domain->bits.pxx);
@ -328,6 +339,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
.bits = {
.pxx = IMX8M_GPU_SW_Pxx_REQ,
.map = IMX8M_GPU_A53_DOMAIN,
.hsk = IMX8M_GPU_HSK_PWRDNREQN,
},
.pgc = IMX8M_PGC_GPU,
},
@ -339,6 +351,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
.bits = {
.pxx = IMX8M_VPU_SW_Pxx_REQ,
.map = IMX8M_VPU_A53_DOMAIN,
.hsk = IMX8M_VPU_HSK_PWRDNREQN,
},
.pgc = IMX8M_PGC_VPU,
},
@ -350,6 +363,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
.bits = {
.pxx = IMX8M_DISP_SW_Pxx_REQ,
.map = IMX8M_DISP_A53_DOMAIN,
.hsk = IMX8M_DISP_HSK_PWRDNREQN,
},
.pgc = IMX8M_PGC_DISP,
},
@ -390,7 +404,7 @@ static const struct imx_pgc_domain imx8m_pgc_domains[] = {
static const struct regmap_range imx8m_yes_ranges[] = {
regmap_reg_range(GPC_LPCR_A_CORE_BSC,
GPC_M4_PU_PDN_FLG),
GPC_PU_PWRHSK),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_MIPI),
GPC_PGC_SR(IMX8M_PGC_MIPI)),
regmap_reg_range(GPC_PGC_CTRL(IMX8M_PGC_PCIE1),