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Commit 7bf894c6 authored by Vikram Mulukutla's avatar Vikram Mulukutla
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qcom: clock-cpu-8994: Add A57 configuration for 8994 V2 



Configure the A57 cluster to run at 300MHz on bootup.

Change-Id: I15df5061b58eea9bfc8ecfa0b06a929c8ba3becf
Signed-off-by: default avatarVikram Mulukutla <markivx@codeaurora.org>
parent 1922db84

Documentation/devicetree/bindings/arm/msm/clock-cpu-8994.txt

+2 −1
Original line number Diff line number Diff line
@@ -6,7 +6,8 @@ the clocks are scaled and also other HW specific parameters like fmax tables, 
avs settings table, etc.



Required properties:

- compatible:		Must be "qcom,clock-cpu-8994"

- compatible:		Must be one of "qcom,clock-cpu-8994" or

			"qcom,clock-cpu-8994-v2"

- reg:			Pairs of physical base addresses and region sizes of

			memory mapped registers.

- reg-names:		Names of the bases for the above registers. Expected

drivers/clk/qcom/clock-cpu-8994.c

+32 −2
Original line number Diff line number Diff line
@@ -1176,6 +1176,7 @@ static int cpu_clock_8994_driver_probe(struct platform_device *pdev) 


static struct of_device_id match_table[] = {

	{ .compatible = "qcom,cpu-clock-8994" },

	{ .compatible = "qcom,cpu-clock-8994-v2" },

	{}

};
@@ -1203,12 +1204,41 @@ module_exit(cpu_clock_8994_exit); 
#define ALIAS1_GLB_BASE_PHY 0xF900F000

#define C1_PLL_BASE_PHY 0xF9016000



int __init cpu_clock_8994_init_a57_v2(void)

{

	pr_info("clock-cpu-8994-v2: configuring clocks for the A57 cluster\n");



	vbases[ALIAS1_GLB_BASE] = ioremap(ALIAS1_GLB_BASE_PHY, SZ_4K);

	if (!vbases[ALIAS1_GLB_BASE]) {

		WARN(1, "Unable to ioremap A57 mux base. Can't configure A57 clocks.\n");

		return -ENOMEM;

	}



	/* Select GPLL0 and use the div-2 divider for 300MHz */

	writel_relaxed(0x26, vbases[ALIAS1_GLB_BASE] + MUX_OFFSET);

	/* Ensure write goes through before A57s are brought up. */

	mb();

	udelay(5);



	pr_cont("clock-cpu-8994-v2: finished configuring A57 cluster clocks.\n");

	iounmap(vbases[ALIAS1_GLB_BASE]);



	return 0;

}



/* Setup the A57 clocks before _this_ driver probes, before smp_init */

int __init cpu_clock_8994_init_a57(void)

{

	u32 regval;

	int xo_sel, lfmux_sel, safe_sel;

	struct device_node *ofnode = of_find_compatible_node(NULL, NULL,

	struct device_node *ofnode;



	ofnode = of_find_compatible_node(NULL, NULL,

					 "qcom,cpu-clock-8994-v2");

	if (ofnode)

		return cpu_clock_8994_init_a57_v2();



	ofnode = of_find_compatible_node(NULL, NULL,

					 "qcom,cpu-clock-8994");

	if (!ofnode)

		return 0;