[PATCH 2/2] i3c: dw: Add optional apb clock
From: Aniket <hidden>
Date: 2024-06-11 17:16:41
Also in:
linux-i3c, lkml
Subsystem:
i3c driver for synopsys designware, i3c subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
Besides the core clock, IP also has an apb interface clock. Add an optional hook for the same and appropriately enable and disable. Signed-off-by: Aniket <redacted> --- drivers/i3c/master/dw-i3c-master.c | 12 ++++++++++++ drivers/i3c/master/dw-i3c-master.h | 1 + 2 files changed, 13 insertions(+)
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 77a2a1c3fd1d..41cdfd6741e3 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c@@ -1470,12 +1470,20 @@ int dw_i3c_common_probe(struct dw_i3c_master *master, if (IS_ERR(master->core_clk)) return PTR_ERR(master->core_clk); + master->pclk = devm_clk_get_optional(&pdev->dev, "pclk"); + if (IS_ERR(master->pclk)) + return PTR_ERR(master->pclk); + master->core_rst = devm_reset_control_get_optional_exclusive(&pdev->dev, "core_rst"); if (IS_ERR(master->core_rst)) return PTR_ERR(master->core_rst); ret = clk_prepare_enable(master->core_clk); + if (ret) + return ret; + + ret = clk_prepare_enable(master->pclk); if (ret) goto err_disable_core_clk;
@@ -1520,6 +1528,8 @@ int dw_i3c_common_probe(struct dw_i3c_master *master, err_assert_rst: reset_control_assert(master->core_rst); + clk_disable_unprepare(master->pclk); + err_disable_core_clk: clk_disable_unprepare(master->core_clk);
@@ -1533,6 +1543,8 @@ void dw_i3c_common_remove(struct dw_i3c_master *master) reset_control_assert(master->core_rst); + clk_disable_unprepare(master->pclk); + clk_disable_unprepare(master->core_clk); } EXPORT_SYMBOL_GPL(dw_i3c_common_remove);
diff --git a/drivers/i3c/master/dw-i3c-master.h b/drivers/i3c/master/dw-i3c-master.h
index 8cb617b8147e..50c38e790c0e 100644
--- a/drivers/i3c/master/dw-i3c-master.h
+++ b/drivers/i3c/master/dw-i3c-master.h@@ -36,6 +36,7 @@ struct dw_i3c_master { void __iomem *regs; struct reset_control *core_rst; struct clk *core_clk; + struct clk *pclk; char version[5]; char type[5]; bool ibi_capable;
--
2.45.2.505.gda0bf45e8d-goog