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clk: meson: meson8b: Fix the polarity of the RESET_N lines 

CLKC_RESET_VID_DIVIDER_CNTL_RESET_N_POST and
CLKC_RESET_VID_DIVIDER_CNTL_RESET_N_PRE are active low. This means:
- asserting them requires setting the register value to 0
- de-asserting them requires setting the register value to 1

Set the register value accordingly for these two reset lines by setting
the inverted the register value compared to all other reset lines.

Fixes: 189621726b ("clk: meson: meson8b: register the built-in reset controller")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200417184127.1319871-3-martin.blumenstingl@googlemail.com
This commit is contained in:
Martin Blumenstingl 2020-04-17 20:41:25 +02:00 committed by Jerome Brunet
parent da1978ac3d
commit 0d3051c790
1 changed files with 56 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
drivers/clk/meson/meson8b.c
View File

@ -3506,54 +3506,87 @@ static struct clk_regmap *const meson8b_clk_regmaps[] = {
static const struct meson8b_clk_reset_line {
u32 reg;
u8 bit_idx;
bool active_low;
} meson8b_clk_reset_bits[] = {
[CLKC_RESET_L2_CACHE_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 30
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 30,
.active_low = false,
},
[CLKC_RESET_AXI_64_TO_128_BRIDGE_A5_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 29
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 29,
.active_low = false,
},
[CLKC_RESET_SCU_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 28
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 28,
.active_low = false,
},
[CLKC_RESET_CPU3_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 27
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 27,
.active_low = false,
},
[CLKC_RESET_CPU2_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 26
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 26,
.active_low = false,
},
[CLKC_RESET_CPU1_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 25
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 25,
.active_low = false,
},
[CLKC_RESET_CPU0_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 24
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 24,
.active_low = false,
},
[CLKC_RESET_A5_GLOBAL_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 18
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 18,
.active_low = false,
},
[CLKC_RESET_A5_AXI_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 17
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 17,
.active_low = false,
},
[CLKC_RESET_A5_ABP_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL0, .bit_idx = 16
.reg = HHI_SYS_CPU_CLK_CNTL0,
.bit_idx = 16,
.active_low = false,
},
[CLKC_RESET_AXI_64_TO_128_BRIDGE_MMC_SOFT_RESET] = {
.reg = HHI_SYS_CPU_CLK_CNTL1, .bit_idx = 30
.reg = HHI_SYS_CPU_CLK_CNTL1,
.bit_idx = 30,
.active_low = false,
},
[CLKC_RESET_VID_CLK_CNTL_SOFT_RESET] = {
.reg = HHI_VID_CLK_CNTL, .bit_idx = 15
.reg = HHI_VID_CLK_CNTL,
.bit_idx = 15,
.active_low = false,
},
[CLKC_RESET_VID_DIVIDER_CNTL_SOFT_RESET_POST] = {
.reg = HHI_VID_DIVIDER_CNTL, .bit_idx = 7
.reg = HHI_VID_DIVIDER_CNTL,
.bit_idx = 7,
.active_low = false,
},
[CLKC_RESET_VID_DIVIDER_CNTL_SOFT_RESET_PRE] = {
.reg = HHI_VID_DIVIDER_CNTL, .bit_idx = 3
.reg = HHI_VID_DIVIDER_CNTL,
.bit_idx = 3,
.active_low = false,
},
[CLKC_RESET_VID_DIVIDER_CNTL_RESET_N_POST] = {
.reg = HHI_VID_DIVIDER_CNTL, .bit_idx = 1
.reg = HHI_VID_DIVIDER_CNTL,
.bit_idx = 1,
.active_low = true,
},
[CLKC_RESET_VID_DIVIDER_CNTL_RESET_N_PRE] = {
.reg = HHI_VID_DIVIDER_CNTL, .bit_idx = 0
.reg = HHI_VID_DIVIDER_CNTL,
.bit_idx = 0,
.active_low = true,
},
};
@ -3562,22 +3595,22 @@ static int meson8b_clk_reset_update(struct reset_controller_dev *rcdev,
{
struct meson8b_clk_reset *meson8b_clk_reset =
container_of(rcdev, struct meson8b_clk_reset, reset);
unsigned long flags;
const struct meson8b_clk_reset_line *reset;
unsigned int value = 0;
unsigned long flags;
if (id >= ARRAY_SIZE(meson8b_clk_reset_bits))
return -EINVAL;
reset = &meson8b_clk_reset_bits[id];
if (assert != reset->active_low)
value = BIT(reset->bit_idx);
spin_lock_irqsave(&meson_clk_lock, flags);
if (assert)
regmap_update_bits(meson8b_clk_reset->regmap, reset->reg,
BIT(reset->bit_idx), BIT(reset->bit_idx));
else
regmap_update_bits(meson8b_clk_reset->regmap, reset->reg,
BIT(reset->bit_idx), 0);
regmap_update_bits(meson8b_clk_reset->regmap, reset->reg,
BIT(reset->bit_idx), value);
spin_unlock_irqrestore(&meson_clk_lock, flags);