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Commit 74c94a90 authored by Taniya Das's avatar Taniya Das Committed by Gerrit - the friendly Code Review server
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clk: qcom: clock-a7: Add support to read efuse for MSM8916 



Efuse bits have been modified for msm8916. Read
the efuse bits and identify the parts.

Change-Id: I8a2246754a9016dad6e7af69c1ef41ceeb25af83
Signed-off-by: default avatarTaniya Das <tdas@codeaurora.org>
parent 90f1b5b9

drivers/clk/qcom/clock-a7.c

+41 −1
Original line number Diff line number Diff line
@@ -153,6 +153,39 @@ static void get_speed_bin(struct platform_device *pdev, int *bin, int *version) 
	return;

}



static void get_speed_bin_b(struct platform_device *pdev, int *bin,

								int *version)

{

	struct resource *res;

	void __iomem *base;

	u32 pte_efuse;



	*bin = 0;

	*version = 0;



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "efuse");

	if (!res) {

		dev_info(&pdev->dev,

			 "No speed/PVS binning available. Defaulting to 0!\n");

		return;

	}



	base = devm_ioremap(&pdev->dev, res->start, resource_size(res));

	if (!base) {

		dev_warn(&pdev->dev,

			 "Unable to read efuse data. Defaulting to 0!\n");

		return;

	}



	pte_efuse = readl_relaxed(base);

	devm_iounmap(&pdev->dev, base);



	*bin = (pte_efuse >> 2) & 0x7;



	dev_info(&pdev->dev, "Speed bin: %d PVS Version: %d\n", *bin,

								*version);

}



static int of_get_clk_src(struct platform_device *pdev, struct clk_src *parents)

{

	struct device_node *of = pdev->dev.of_node;
@@ -195,6 +228,10 @@ static int clock_a7_probe(struct platform_device *pdev) 
	struct clk *aux_clk, *main_pll;

	char prop_name[] = "qcom,speedX-bin-vX";

	const void *prop;

	bool compat_bin = false;



	compat_bin = of_device_is_compatible(pdev->dev.of_node,

						"qcom,clock-a53-8916");



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rcg-base");

	if (!res) {
@@ -225,6 +262,9 @@ static int clock_a7_probe(struct platform_device *pdev) 
	if (prop)

		a7ssmux.safe_freq = of_read_ulong(prop, 1);



	if (compat_bin)

		get_speed_bin_b(pdev, &speed_bin, &version);

	else

		get_speed_bin(pdev, &speed_bin, &version);



	snprintf(prop_name, ARRAY_SIZE(prop_name),