From 5d9bc010db0a4f5b17b3f5f982a85c49bb911754 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sun, 4 Jul 2021 10:40:32 +0800 Subject: clk: qcom: a53-pll: Add MSM8939 a53pll support MSM8939 has 3 a53pll clocks with different frequency table for Cluster0, Cluster1 and CCI. It adds function qcom_a53pll_get_freq_tbl() to create pll_freq_tbl from OPP, so that those a53pll frequencies can be defined in DT with operating-points-v2 bindings rather than being coded in the driver. In this case, one compatible rather than three would be needed for these 3 a53pll clocks. Signed-off-by: Shawn Guo Link: https://lore.kernel.org/r/20210704024032.11559-5-shawn.guo@linaro.org Signed-off-by: Stephen Boyd --- drivers/clk/qcom/a53-pll.c | 59 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 58 insertions(+), 1 deletion(-) (limited to 'drivers/clk') diff --git a/drivers/clk/qcom/a53-pll.c b/drivers/clk/qcom/a53-pll.c index 96a118be912d..9e6decb9c26f 100644 --- a/drivers/clk/qcom/a53-pll.c +++ b/drivers/clk/qcom/a53-pll.c @@ -6,9 +6,11 @@ * Author: Georgi Djakov */ +#include #include #include #include +#include #include #include @@ -34,6 +36,55 @@ static const struct regmap_config a53pll_regmap_config = { .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; @@ -65,7 +116,12 @@ 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; + + 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", @@ -96,6 +152,7 @@ static int qcom_a53pll_probe(struct platform_device *pdev) static const struct of_device_id qcom_a53pll_match_table[] = { { .compatible = "qcom,msm8916-a53pll" }, + { .compatible = "qcom,msm8939-a53pll" }, { } }; MODULE_DEVICE_TABLE(of, qcom_a53pll_match_table); -- cgit v1.2.3-59-g8ed1b