Hi Soeren,
On Mon, 9 Dec 2019 at 17:28, Soeren Moch <smoch@xxxxxx> wrote:
>
> With the device tree property "rockchip,system-power-controller" we
> explicitly request to use this PMIC to power off the system. So always
> register our poweroff function, even if some other handler (probably
> PSCI poweroff) was registered before.
>
> Signed-off-by: Soeren Moch <smoch@xxxxxx>
> ---
> Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> Cc: Heiko Stuebner <heiko@xxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-rockchip@xxxxxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> ---
> drivers/mfd/rk808.c | 11 ++---------
> 1 file changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
> index a69a6742ecdc..616e44e7ef98 100644
> --- a/drivers/mfd/rk808.c
> +++ b/drivers/mfd/rk808.c
> @@ -550,7 +550,7 @@ static int rk808_probe(struct i2c_client *client,
> const struct mfd_cell *cells;
> int nr_pre_init_regs;
> int nr_cells;
> - int pm_off = 0, msb, lsb;
> + int msb, lsb;
> unsigned char pmic_id_msb, pmic_id_lsb;
> int ret;
> int i;
> @@ -674,16 +674,9 @@ static int rk808_probe(struct i2c_client *client,
> goto err_irq;
> }
>
> - pm_off = of_property_read_bool(np,
> - "rockchip,system-power-controller");
> - if (pm_off && !pm_power_off) {
> + if (of_property_read_bool(np, "rockchip,system-power-controller")) {
> rk808_i2c_client = client;
> pm_power_off = rk808->pm_pwroff_fn;
> - }
> -
> - if (pm_off && !pm_power_off_prepare) {
> - if (!rk808_i2c_client)
> - rk808_i2c_client = client;
> pm_power_off_prepare = rk808->pm_pwroff_prep_fn;
> }
>
I gave this a try on my Rock960 and Odroid N1
both got kernel panic below.
[ 58.305868] xhci-hcd xhci-hcd.0.auto: USB bus 5 deregistered
[ 58.306747] reboot: Power down
[ 58.307106] ------------[ cut here ]------------
[ 58.307510] No atomic I2C transfer handler for 'i2c-0'
[ 58.308007] WARNING: CPU: 0 PID: 1 at drivers/i2c/i2c-core.h:41
i2c_transfer+0xe4/0xf8
[ 58.308696] Modules linked in: snd_soc_hdmi_codec dw_hdmi_i2s_audio
rockchipdrm analogix_dp brcmfmac nvme dw_mipi_dsi nvme_core dw_hdmi
panfrost cec brcmutil drm_kms_helper gpu_sched cfg80211 hci_uart drm
btbcm crct10dif_ce snd_soc_simple_card bluetooth snd_soc_rockchip_i2s
snd_soc_simple_card_utils snd_soc_rockchip_pcm phy_rockchip_pcie
ecdh_generic rtc_rk808 ecc pcie_rockchip_host rfkill rockchip_thermal
ip_tables x_tables ipv6 nf_defrag_ipv6
[ 58.312150] CPU: 0 PID: 1 Comm: shutdown Not tainted 5.5.0-rc1-dirty #1
[ 58.312725] Hardware name: 96boards Rock960 (DT)
[ 58.313131] pstate: 60000085 (nZCv daIf -PAN -UAO)
[ 58.313551] pc : i2c_transfer+0xe4/0xf8
[ 58.313889] lr : i2c_transfer+0xe4/0xf8
[ 58.314225] sp : ffff80001004bb00
[ 58.314516] x29: ffff80001004bb00 x28: ffff00007d208000
[ 58.314981] x27: 0000000000000000 x26: 0000000000000000
[ 58.315446] x25: 0000000000000000 x24: 0000000000000008
[ 58.315910] x23: 0000000000000000 x22: ffff80001004bc74
[ 58.316375] x21: 0000000000000002 x20: ffff80001004bb58
[ 58.316841] x19: ffff0000784f0880 x18: 0000000000000010
[ 58.317305] x17: 0000000000000001 x16: 0000000000000019
[ 58.317770] x15: ffffffffffffffff x14: ffff8000118398c8
[ 58.318236] x13: ffff80009004b867 x12: ffff80001004b86f
[ 58.318701] x11: ffff800011851000 x10: ffff80001004b7f0
[ 58.319166] x9 : 00000000ffffffd0 x8 : ffff800010699ad8
[ 58.319631] x7 : 0000000000000265 x6 : ffff800011a20be9
[ 58.320096] x5 : 0000000000000000 x4 : 0000000000000000
[ 58.320561] x3 : 00000000ffffffff x2 : ffff800011851ab8
[ 58.321026] x1 : d375c0d4f4751f00 x0 : 0000000000000000
[ 58.321491] Call trace:
[ 58.321710] i2c_transfer+0xe4/0xf8
[ 58.322020] regmap_i2c_read+0x5c/0x98
[ 58.322350] _regmap_raw_read+0xcc/0x138
[ 58.322694] _regmap_bus_read+0x3c/0x70
[ 58.323034] _regmap_read+0x60/0xe0
[ 58.323341] _regmap_update_bits+0xc8/0x108
[ 58.323707] regmap_update_bits_base+0x60/0x90
[ 58.324099] rk808_device_shutdown+0x38/0x50
[ 58.324476] machine_power_off+0x24/0x30
[ 58.324823] kernel_power_off+0x64/0x70
[ 58.325159] __do_sys_reboot+0x15c/0x240
[ 58.325504] __arm64_sys_reboot+0x20/0x28
[ 58.325858] el0_svc_common.constprop.2+0x88/0x150
[ 58.326279] el0_svc_handler+0x20/0x80
[ 58.326607] el0_sync_handler+0x118/0x188
[ 58.326960] el0_sync+0x140/0x180
[ 58.327251] ---[ end trace b1de39d03d724d01 ]---
-Anand
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