Messages in this thread Patch in this message | | | From | Ben Dooks <> | Subject | [PATCH 1/8] clk: tegra: implement reset status callback | Date | Fri, 20 Jul 2018 14:45:25 +0100 |
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Add a the status callback for the reset controller part of the clock code in the tegra to allow drivers to query the status of a reset line.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> --- drivers/clk/tegra/clk.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c index ffaf17f71860..a2cb3d0d38bf 100644 --- a/drivers/clk/tegra/clk.c +++ b/drivers/clk/tegra/clk.c @@ -146,6 +146,19 @@ static const struct tegra_clk_periph_regs periph_regs[] = { static void __iomem *clk_base; +static int tegra_clk_rst_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + void __iomem *reg; + + if (id < periph_banks * 32) { + reg = clk_base + periph_regs[id / 32].rst_reg; + return readl_relaxed(reg) & BIT(id % 32) ? 1 : 0; + } + + return -EINVAL; +} + static int tegra_clk_rst_assert(struct reset_controller_dev *rcdev, unsigned long id) { @@ -288,6 +301,7 @@ void __init tegra_init_from_table(struct tegra_clk_init_table *tbl, } static const struct reset_control_ops rst_ops = { + .status = tegra_clk_rst_status, .assert = tegra_clk_rst_assert, .deassert = tegra_clk_rst_deassert, .reset = tegra_clk_rst_reset, -- 2.18.0
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