From: Robert Marko robimarko@gmail.com
[ Upstream commit 4a5210893625f89723ea210d7c630b730abb37ad ]
This patch adds the support for giving the complete bitmask in reset structure and reset operation will use this bitmask for all reset operations.
Currently, reset structure only takes a single bit for each reset and then calculates the bitmask by using the BIT() macro.
However, this is not sufficient anymore for newer SoC-s like IPQ8074, IPQ6018 and more, since their networking resets require multiple bits to be asserted in order to properly reset the HW block completely.
So, in order to allow asserting multiple bits add "bitmask" field to qcom_reset_map, and then use that bitmask value if its populated in the driver, if its not populated, then we just default to existing behaviour and calculate the bitmask on the fly.
Signed-off-by: Robert Marko robimarko@gmail.com Signed-off-by: Bjorn Andersson andersson@kernel.org Link: https://lore.kernel.org/r/20221107132901.489240-1-robimarko@gmail.com Stable-dep-of: 2f8cf2c3f3e3 ("clk: qcom: reset: Ensure write completion on reset de/assertion") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/qcom/reset.c | 4 ++-- drivers/clk/qcom/reset.h | 1 + 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/qcom/reset.c b/drivers/clk/qcom/reset.c index fc68c8fa30ac7..60b60631c3445 100644 --- a/drivers/clk/qcom/reset.c +++ b/drivers/clk/qcom/reset.c @@ -38,7 +38,7 @@ qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
rst = to_qcom_reset_controller(rcdev); map = &rst->reset_map[id]; - mask = BIT(map->bit); + mask = map->bitmask ? map->bitmask : BIT(map->bit);
return regmap_update_bits(rst->regmap, map->reg, mask, mask); } @@ -52,7 +52,7 @@ qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
rst = to_qcom_reset_controller(rcdev); map = &rst->reset_map[id]; - mask = BIT(map->bit); + mask = map->bitmask ? map->bitmask : BIT(map->bit);
return regmap_update_bits(rst->regmap, map->reg, mask, 0); } diff --git a/drivers/clk/qcom/reset.h b/drivers/clk/qcom/reset.h index 3e30f6724c7a4..a118311503d41 100644 --- a/drivers/clk/qcom/reset.h +++ b/drivers/clk/qcom/reset.h @@ -20,6 +20,7 @@ struct qcom_reset_map { unsigned int reg; u8 bit; u8 udelay; + u32 bitmask; };
struct regmap;