From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Dooks Subject: [PATCH 1/8] clk: tegra: implement reset status callback Date: Fri, 20 Jul 2018 14:45:25 +0100 Message-ID: <20180720134532.13148-2-ben.dooks@codethink.co.uk> References: <20180720134532.13148-1-ben.dooks@codethink.co.uk> Return-path: In-Reply-To: <20180720134532.13148-1-ben.dooks@codethink.co.uk> Sender: linux-kernel-owner@vger.kernel.org To: linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Cc: pdeschrijver@nvidia.com, pgaikwad@nvidia.com, jonathanh@nvidia.co, thierry.reding@gmail.com, linux-kernel@lists.codethink.co.uk, Ben Dooks List-Id: linux-tegra@vger.kernel.org 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 --- 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