A branch clock is basically a clock that can be gated for power savings,
but is also what devices/drivers consume. Configuring a branch clock's
rate needs to be done at the source, so for all branch clocks which have
a defined parent, set CLK_SET_RATE_PARENT so that clk_set_rate() calls on
branch clocks can do what is expected. This is important as most drivers
do not check the resulting clock rate after a successful clk_set_rate()
call, thus the driver may get out of sync with the actual hardware state
and weird issues might crop up. This has been observed with issues
getting SDHCI to reliably support "fast" cards such as SDR104.
Fixes: 4807c71cc688 (arm64: dts: Add msm8998 SoC and MTP board support)
Signed-off-by: Jeffrey Hugo <jhugo@xxxxxxxxxxxxxx>
---
drivers/clk/qcom/gcc-msm8998.c | 48 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/drivers/clk/qcom/gcc-msm8998.c b/drivers/clk/qcom/gcc-msm8998.c
index 1b77939..b618bbf 100644
--- a/drivers/clk/qcom/gcc-msm8998.c
+++ b/drivers/clk/qcom/gcc-msm8998.c
@@ -1189,6 +1189,7 @@ enum {
"ufs_axi_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1206,6 +1207,7 @@ enum {
"usb30_master_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1288,6 +1290,7 @@ enum {
"blsp1_qup1_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1305,6 +1308,7 @@ enum {
"blsp1_qup1_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1322,6 +1326,7 @@ enum {
"blsp1_qup2_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1339,6 +1344,7 @@ enum {
"blsp1_qup2_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1356,6 +1362,7 @@ enum {
"blsp1_qup3_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1373,6 +1380,7 @@ enum {
"blsp1_qup3_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1390,6 +1398,7 @@ enum {
"blsp1_qup4_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1407,6 +1416,7 @@ enum {
"blsp1_qup4_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1424,6 +1434,7 @@ enum {
"blsp1_qup5_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1441,6 +1452,7 @@ enum {
"blsp1_qup5_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1458,6 +1470,7 @@ enum {
"blsp1_qup6_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1475,6 +1488,7 @@ enum {
"blsp1_qup6_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1505,6 +1519,7 @@ enum {
"blsp1_uart1_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1522,6 +1537,7 @@ enum {
"blsp1_uart2_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1539,6 +1555,7 @@ enum {
"blsp1_uart3_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1569,6 +1586,7 @@ enum {
"blsp2_qup1_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1586,6 +1604,7 @@ enum {
"blsp2_qup1_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1603,6 +1622,7 @@ enum {
"blsp2_qup2_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1620,6 +1640,7 @@ enum {
"blsp2_qup2_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1637,6 +1658,7 @@ enum {
"blsp2_qup3_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1654,6 +1676,7 @@ enum {
"blsp2_qup3_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1671,6 +1694,7 @@ enum {
"blsp2_qup4_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1688,6 +1712,7 @@ enum {
"blsp2_qup4_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1705,6 +1730,7 @@ enum {
"blsp2_qup5_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1722,6 +1748,7 @@ enum {
"blsp2_qup5_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1739,6 +1766,7 @@ enum {
"blsp2_qup6_i2c_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1756,6 +1784,7 @@ enum {
"blsp2_qup6_spi_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1786,6 +1815,7 @@ enum {
"blsp2_uart1_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1803,6 +1833,7 @@ enum {
"blsp2_uart2_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1820,6 +1851,7 @@ enum {
"blsp2_uart3_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1837,6 +1869,7 @@ enum {
"usb30_master_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1854,6 +1887,7 @@ enum {
"gp1_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1871,6 +1905,7 @@ enum {
"gp2_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1888,6 +1923,7 @@ enum {
"gp3_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1957,6 +1993,7 @@ enum {
"hmss_ahb_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -1987,6 +2024,7 @@ enum {
"hmss_rbcpr_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2088,6 +2126,7 @@ enum {
"pcie_aux_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2157,6 +2196,7 @@ enum {
"pcie_aux_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2174,6 +2214,7 @@ enum {
"pdm2_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2243,6 +2284,7 @@ enum {
"sdcc2_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2273,6 +2315,7 @@ enum {
"sdcc4_apps_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2316,6 +2359,7 @@ enum {
"tsif_ref_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2346,6 +2390,7 @@ enum {
"ufs_axi_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2441,6 +2486,7 @@ enum {
"usb30_master_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2458,6 +2504,7 @@ enum {
"usb30_mock_utmi_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
@@ -2488,6 +2535,7 @@ enum {
"usb3_phy_aux_clk_src",
},
.num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
.ops = &clk_branch2_ops,
},
},
--
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Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
