bus: imx-weim: optionally enable burst clock mode (77266e72) · Commits · 戴 / test

To enable burst clock mode, add the fsl,burst-clk-enable property to the weim bus's devicetree node. Example: weim: weim@21b8000 { compatible = "fsl,imx6q-weim"; reg = <0x021b8000 0x4000>; clocks = <&clks 196>; #address-cells = <2>; #size-cells = <1>; ranges = <0 0 0x08000000 0x08000000>; fsl,weim-cs-gpr = <&gpr>; fsl,burst-clk-enable; client-device@0,0 { compatible = "something"; reg = <0 0 0x02000000>; #address-cells = <1>; #size-cells = <1>; bank-width = <2>; fsl,weim-cs-timing = <0x00620081 0x00000001 0x1c022000 0x0000c000 0x1404a38e 0x00000000>; }; }; Signed-off-by:

Sven Van Asbroeck <TheSven73@gmail.com> Reviewed-by:

Fabio Estevam <festevam@gmail.com> Signed-off-by:

Shawn Guo <shawnguo@kernel.org>

drivers/bus/imx-weim.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,8 @@ struct imx_weim_devtype {
		unsigned int cs_count;
		unsigned int cs_regs_count;
		unsigned int cs_stride;
		unsigned int wcr_offset;
		unsigned int wcr_bcm;
		};

		static const struct imx_weim_devtype imx1_weim_devtype = {
		@@ -37,6 +39,8 @@ static const struct imx_weim_devtype imx50_weim_devtype = {
		.cs_count = 4,
		.cs_regs_count = 6,
		.cs_stride = 0x18,
		.wcr_offset = 0x90,
		.wcr_bcm = BIT(0),
		};

		static const struct imx_weim_devtype imx51_weim_devtype = {
		@@ -192,6 +196,7 @@ static int __init weim_parse_dt(struct platform_device *pdev,
		struct device_node *child;
		int ret, have_child = 0;
		struct cs_timing_state ts = {};
		u32 reg;

		if (devtype == &imx50_weim_devtype) {
		ret = imx_weim_gpr_setup(pdev);
		@@ -199,6 +204,17 @@ static int __init weim_parse_dt(struct platform_device *pdev,
		return ret;
		}

		if (of_property_read_bool(pdev->dev.of_node, "fsl,burst-clk-enable")) {
		if (devtype->wcr_bcm) {
		reg = readl(base + devtype->wcr_offset);
		writel(reg \| devtype->wcr_bcm,
		base + devtype->wcr_offset);
		} else {
		dev_err(&pdev->dev, "burst clk mode not supported.\n");
		return -EINVAL;
		}
		}

		for_each_available_child_of_node(pdev->dev.of_node, child) {
		ret = weim_timing_setup(&pdev->dev, child, base, devtype, &ts);
		if (ret)

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