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path: root/drivers/clk/qcom/gcc-msm8916.c
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Diffstat (limited to 'drivers/clk/qcom/gcc-msm8916.c')
-rw-r--r--drivers/clk/qcom/gcc-msm8916.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/clk/qcom/gcc-msm8916.c b/drivers/clk/qcom/gcc-msm8916.c
index 17e4a5a2a9fd..9a46794f6eb8 100644
--- a/drivers/clk/qcom/gcc-msm8916.c
+++ b/drivers/clk/qcom/gcc-msm8916.c
@@ -765,7 +765,20 @@ static struct clk_rcg2 cci_clk_src = {
},
};
+/*
+ * This is a frequency table for "General Purpose" clocks.
+ * These clocks can be muxed to the SoC pins and may be used by
+ * external devices. They're often used as PWM source.
+ *
+ * See comment at ftbl_gcc_gp1_3_clk.
+ */
static const struct freq_tbl ftbl_gcc_camss_gp0_1_clk[] = {
+ F(10000, P_XO, 16, 1, 120),
+ F(100000, P_XO, 16, 1, 12),
+ F(500000, P_GPLL0, 16, 1, 100),
+ F(1000000, P_GPLL0, 16, 1, 50),
+ F(2500000, P_GPLL0, 16, 1, 20),
+ F(5000000, P_GPLL0, 16, 1, 10),
F(100000000, P_GPLL0, 8, 0, 0),
F(200000000, P_GPLL0, 4, 0, 0),
{ }
@@ -927,7 +940,29 @@ static struct clk_rcg2 crypto_clk_src = {
},
};
+/*
+ * This is a frequency table for "General Purpose" clocks.
+ * These clocks can be muxed to the SoC pins and may be used by
+ * external devices. They're often used as PWM source.
+ *
+ * Please note that MND divider must be enabled for duty-cycle
+ * control to be possible. (M != N) Also since D register is configured
+ * with a value multiplied by 2, and duty cycle is calculated as
+ * (2 * D) % 2^W
+ * DutyCycle = ----------------
+ * 2 * (N % 2^W)
+ * (where W = .mnd_width)
+ * N must be half or less than maximum value for the register.
+ * Otherwise duty-cycle control would be limited.
+ * (e.g. for 8-bit NMD N should be less than 128)
+ */
static const struct freq_tbl ftbl_gcc_gp1_3_clk[] = {
+ F(10000, P_XO, 16, 1, 120),
+ F(100000, P_XO, 16, 1, 12),
+ F(500000, P_GPLL0, 16, 1, 100),
+ F(1000000, P_GPLL0, 16, 1, 50),
+ F(2500000, P_GPLL0, 16, 1, 20),
+ F(5000000, P_GPLL0, 16, 1, 10),
F(19200000, P_XO, 1, 0, 0),
{ }
};