[PATCH 03/11] i2c: imx-lpi2c: add ipg clk for lpi2c driver
From: Clark Wang <xiaoning.wang@nxp.com>
Date: 2021-03-17 06:54:57
Also in:
linux-i2c, lkml
Subsystem:
freescale imx lpi2c driver, i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Dong Aisheng, Andi Shyti, Linus Torvalds
The lpi2c IP needs two clks: ipg clk and per clk. The old lpi2c driver missed ipg clk. This patch adds ipg clk for lpi2c driver. Signed-off-by: Gao Pan <redacted> Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Acked-by: Fugang Duan <redacted> --- drivers/i2c/busses/i2c-imx-lpi2c.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-)
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 1e920e7ac7c1..664fcc0dba51 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c@@ -94,7 +94,8 @@ enum lpi2c_imx_pincfg { struct lpi2c_imx_struct { struct i2c_adapter adapter; - struct clk *clk; + struct clk *clk_per; + struct clk *clk_ipg; void __iomem *base; __u8 *rx_buf; __u8 *tx_buf;
@@ -563,10 +564,16 @@ static int lpi2c_imx_probe(struct platform_device *pdev) strlcpy(lpi2c_imx->adapter.name, pdev->name, sizeof(lpi2c_imx->adapter.name)); - lpi2c_imx->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(lpi2c_imx->clk)) { + lpi2c_imx->clk_per = devm_clk_get(&pdev->dev, "per"); + if (IS_ERR(lpi2c_imx->clk_per)) { dev_err(&pdev->dev, "can't get I2C peripheral clock\n"); - return PTR_ERR(lpi2c_imx->clk); + return PTR_ERR(lpi2c_imx->clk_per); + } + + lpi2c_imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); + if (IS_ERR(lpi2c_imx->clk_ipg)) { + dev_err(&pdev->dev, "can't get I2C ipg clock\n"); + return PTR_ERR(lpi2c_imx->clk_ipg); } ret = of_property_read_u32(pdev->dev.of_node,
@@ -633,7 +640,8 @@ static int __maybe_unused lpi2c_runtime_suspend(struct device *dev) { struct lpi2c_imx_struct *lpi2c_imx = dev_get_drvdata(dev); - clk_disable_unprepare(lpi2c_imx->clk); + clk_disable_unprepare(lpi2c_imx->clk_ipg); + clk_disable_unprepare(lpi2c_imx->clk_per); pinctrl_pm_select_idle_state(dev); return 0;
@@ -645,12 +653,18 @@ static int __maybe_unused lpi2c_runtime_resume(struct device *dev) int ret; pinctrl_pm_select_default_state(dev); - ret = clk_prepare_enable(lpi2c_imx->clk); + ret = clk_prepare_enable(lpi2c_imx->clk_per); if (ret) { - dev_err(dev, "can't enable I2C clock, ret=%d\n", ret); + dev_err(dev, "can't enable I2C per clock, ret=%d\n", ret); return ret; } + ret = clk_prepare_enable(lpi2c_imx->clk_ipg); + if (ret) { + clk_disable_unprepare(lpi2c_imx->clk_per); + dev_err(dev, "can't enable I2C ipg clock, ret=%d\n", ret); + } + return ret; }
--
2.25.1
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