1 files changed, 71 insertions, 8 deletions

diff --git a/drivers/clk/qcom/a53-pll.c b/drivers/clk/qcom/a53-pll.c
index 45cfc57bff92..724a642311e5 100644
--- a/drivers/clk/qcom/a53-pll.c
+++ b/drivers/clk/qcom/a53-pll.c
@@ -6,9 +6,11 @@
  * Author: Georgi Djakov <georgi.djakov@linaro.org>
  */
 
+#include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/pm_opp.h>
 #include <linux/regmap.h>
 #include <linux/module.h>
 
@@ -31,14 +33,62 @@ static const struct regmap_config a53pll_regmap_config = {
 	.reg_stride		= 4,
 	.val_bits		= 32,
 	.max_register		= 0x40,
-	.fast_io		= true,
 };
 
+static struct pll_freq_tbl *qcom_a53pll_get_freq_tbl(struct device *dev)
+{
+	struct pll_freq_tbl *freq_tbl;
+	unsigned long xo_freq;
+	unsigned long freq;
+	struct clk *xo_clk;
+	int count;
+	int ret;
+	int i;
+
+	xo_clk = devm_clk_get(dev, "xo");
+	if (IS_ERR(xo_clk))
+		return NULL;
+
+	xo_freq = clk_get_rate(xo_clk);
+
+	ret = devm_pm_opp_of_add_table(dev);
+	if (ret)
+		return NULL;
+
+	count = dev_pm_opp_get_opp_count(dev);
+	if (count <= 0)
+		return NULL;
+
+	freq_tbl = devm_kcalloc(dev, count + 1, sizeof(*freq_tbl), GFP_KERNEL);
+	if (!freq_tbl)
+		return NULL;
+
+	for (i = 0, freq = 0; i < count; i++, freq++) {
+		struct dev_pm_opp *opp;
+
+		opp = dev_pm_opp_find_freq_ceil(dev, &freq);
+		if (IS_ERR(opp))
+			return NULL;
+
+		/* Skip the freq that is not divisible */
+		if (freq % xo_freq)
+			continue;
+
+		freq_tbl[i].freq = freq;
+		freq_tbl[i].l = freq / xo_freq;
+		freq_tbl[i].n = 1;
+
+		dev_pm_opp_put(opp);
+	}
+
+	return freq_tbl;
+}
+
 static int qcom_a53pll_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
 	struct regmap *regmap;
-	struct resource *res;
 	struct clk_pll *pll;
 	void __iomem *base;
 	struct clk_init_data init = { };
@@ -48,8 +98,7 @@ static int qcom_a53pll_probe(struct platform_device *pdev)
 	if (!pll)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
@@ -64,13 +113,24 @@ static int qcom_a53pll_probe(struct platform_device *pdev)
 	pll->mode_reg = 0x00;
 	pll->status_reg = 0x1c;
 	pll->status_bit = 16;
-	pll->freq_tbl = a53pll_freq;
 
-	init.name = "a53pll";
-	init.parent_names = (const char *[]){ "xo" };
+	pll->freq_tbl = qcom_a53pll_get_freq_tbl(dev);
+	if (!pll->freq_tbl) {
+		/* Fall on a53pll_freq if no freq_tbl is found from OPP */
+		pll->freq_tbl = a53pll_freq;
+	}
+
+	/* Use an unique name by appending @unit-address */
+	init.name = devm_kasprintf(dev, GFP_KERNEL, "a53pll%s",
+				   strchrnul(np->full_name, '@'));
+	if (!init.name)
+		return -ENOMEM;
+
+	init.parent_data = &(const struct clk_parent_data){
+		.fw_name = "xo", .name = "xo_board",
+	};
 	init.num_parents = 1;
 	init.ops = &clk_pll_sr2_ops;
-	init.flags = CLK_IS_CRITICAL;
 	pll->clkr.hw.init = &init;
 
 	ret = devm_clk_register_regmap(dev, &pll->clkr);
@@ -90,9 +150,12 @@ static int qcom_a53pll_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_a53pll_match_table[] = {
+	{ .compatible = "qcom,msm8226-a7pll" },
 	{ .compatible = "qcom,msm8916-a53pll" },
+	{ .compatible = "qcom,msm8939-a53pll" },
 	{ }
 };
+MODULE_DEVICE_TABLE(of, qcom_a53pll_match_table);
 
 static struct platform_driver qcom_a53pll_driver = {
 	.probe = qcom_a53pll_probe,