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| author | Emmanuel Vadot <manu@FreeBSD.org> | 2021-07-24 15:44:18 +0000 |
|---|---|---|
| committer | Emmanuel Vadot <manu@FreeBSD.org> | 2021-07-24 15:46:25 +0000 |
| commit | 12faeba9953ac7fa5198b258dcd80f89b3b4b947 (patch) | |
| tree | 358ea07d80099711c2635e222575978264773e9e /sys/arm | |
| parent | a2e3e1187309f9404940b61ca49a93bd0536559d (diff) | |
| download | src-12faeba9953ac7fa5198b258dcd80f89b3b4b947.tar.gz src-12faeba9953ac7fa5198b258dcd80f89b3b4b947.zip | |
allwinner: rsb: Set the PMIC to RSB mode
With recent ATF (v2.5) the PMIC is reset to I2C mode.
Without a PMIC no regulators can be changed/enabled/disabled
This fixes cpufreq on A64 (at least) and anything else that needs
regulators handled by the PMIC.
MFC after: 3 days
Sponsored by: Diablotin Systems
Diffstat (limited to 'sys/arm')
| -rw-r--r-- | sys/arm/allwinner/aw_rsb.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sys/arm/allwinner/aw_rsb.c b/sys/arm/allwinner/aw_rsb.c index 48103af6ac6e..e6714107d7b4 100644 --- a/sys/arm/allwinner/aw_rsb.c +++ b/sys/arm/allwinner/aw_rsb.c @@ -71,6 +71,10 @@ __FBSDID("$FreeBSD$"); #define DLEN_READ (1 << 4) #define RSB_DATA0 0x1c #define RSB_DATA1 0x20 +#define RSB_PMCR 0x28 +#define RSB_PMCR_START (1 << 31) +#define RSB_PMCR_DATA(x) (x << 16) +#define RSB_PMCR_REG(x) (x << 8) #define RSB_CMD 0x2c #define CMD_SRTA 0xe8 #define CMD_RD8 0x8b @@ -93,6 +97,10 @@ __FBSDID("$FreeBSD$"); #define RSB_ADDR_PMIC_SECONDARY 0x745 #define RSB_ADDR_PERIPH_IC 0xe89 +#define PMIC_MODE_REG 0x3e +#define PMIC_MODE_I2C 0x00 +#define PMIC_MODE_RSB 0x7c + #define A31_P2WI 1 #define A23_RSB 2 @@ -436,6 +444,9 @@ rsb_attach(device_t dev) goto fail; } + /* Set the PMIC into RSB mode as ATF might have leave it in I2C mode */ + RSB_WRITE(sc, RSB_PMCR, RSB_PMCR_REG(PMIC_MODE_REG) | RSB_PMCR_DATA(PMIC_MODE_RSB) | RSB_PMCR_START); + sc->iicbus = device_add_child(dev, "iicbus", -1); if (sc->iicbus == NULL) { device_printf(dev, "cannot add iicbus child device\n"); |