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authorJasper Mattsson <jasu@njomotys.info>2019-02-14 17:32:42 +0100
committerStephen Boyd <sboyd@kernel.org>2019-02-26 18:54:50 +0100
commitb35656de2a13298512a558506fa8d97a9eda5494 (patch)
treeb1bea96f1f55bc3c8164161fcddaf6e8551314be /drivers/clk/mediatek
parentclk: mediatek: Add flags to mtk_gate (diff)
downloadlinux-b35656de2a13298512a558506fa8d97a9eda5494.tar.xz
linux-b35656de2a13298512a558506fa8d97a9eda5494.zip
clk: mediatek: Mark bus and DRAM related clocks as critical
Currently, DRAM-related clocks are not marked with CLK_IS_CRITICAL for MT6797. This causes memory corruption when the system is booted without clk_ignore_unused. This patch marks MUX ddrphycfg_sel as well as gates infra_dramc_f26m and infra_dramc_b_f26m as CLK_IS_CRITICAL. Signed-off-by: Jasper Mattsson <jasu@njomotys.info> Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/mediatek')
-rw-r--r--drivers/clk/mediatek/clk-mt6797.c68
1 files changed, 43 insertions, 25 deletions
diff --git a/drivers/clk/mediatek/clk-mt6797.c b/drivers/clk/mediatek/clk-mt6797.c
index 5702bc974ed9..c2b46b184b9a 100644
--- a/drivers/clk/mediatek/clk-mt6797.c
+++ b/drivers/clk/mediatek/clk-mt6797.c
@@ -324,6 +324,10 @@ static const char * const anc_md32_parents[] = {
"univpll_d5",
};
+/*
+ * Clock mux ddrphycfg is needed by the DRAM controller. We mark it as
+ * critical as otherwise the system will hang after boot.
+ */
static const struct mtk_composite top_muxes[] = {
MUX(CLK_TOP_MUX_ULPOSC_AXI_CK_MUX_PRE, "ulposc_axi_ck_mux_pre",
ulposc_axi_ck_mux_pre_parents, 0x0040, 3, 1),
@@ -331,8 +335,8 @@ static const struct mtk_composite top_muxes[] = {
ulposc_axi_ck_mux_parents, 0x0040, 2, 1),
MUX(CLK_TOP_MUX_AXI, "axi_sel", axi_parents,
0x0040, 0, 2),
- MUX(CLK_TOP_MUX_DDRPHYCFG, "ddrphycfg_sel", ddrphycfg_parents,
- 0x0040, 16, 2),
+ MUX_FLAGS(CLK_TOP_MUX_DDRPHYCFG, "ddrphycfg_sel", ddrphycfg_parents,
+ 0x0040, 16, 2, CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
MUX(CLK_TOP_MUX_MM, "mm_sel", mm_parents,
0x0040, 24, 2),
MUX_GATE(CLK_TOP_MUX_PWM, "pwm_sel", pwm_parents, 0x0050, 0, 3, 7),
@@ -424,33 +428,45 @@ static const struct mtk_gate_regs infra2_cg_regs = {
.sta_ofs = 0x00b0,
};
-#define GATE_ICG0(_id, _name, _parent, _shift) { \
- .id = _id, \
- .name = _name, \
- .parent_name = _parent, \
- .regs = &infra0_cg_regs, \
- .shift = _shift, \
- .ops = &mtk_clk_gate_ops_setclr, \
+#define GATE_ICG0(_id, _name, _parent, _shift) { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _parent, \
+ .regs = &infra0_cg_regs, \
+ .shift = _shift, \
+ .ops = &mtk_clk_gate_ops_setclr, \
}
-#define GATE_ICG1(_id, _name, _parent, _shift) { \
- .id = _id, \
- .name = _name, \
- .parent_name = _parent, \
- .regs = &infra1_cg_regs, \
- .shift = _shift, \
- .ops = &mtk_clk_gate_ops_setclr, \
+#define GATE_ICG1(_id, _name, _parent, _shift) \
+ GATE_ICG1_FLAGS(_id, _name, _parent, _shift, 0)
+
+#define GATE_ICG1_FLAGS(_id, _name, _parent, _shift, _flags) { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _parent, \
+ .regs = &infra1_cg_regs, \
+ .shift = _shift, \
+ .ops = &mtk_clk_gate_ops_setclr, \
+ .flags = _flags, \
}
-#define GATE_ICG2(_id, _name, _parent, _shift) { \
- .id = _id, \
- .name = _name, \
- .parent_name = _parent, \
- .regs = &infra2_cg_regs, \
- .shift = _shift, \
- .ops = &mtk_clk_gate_ops_setclr, \
+#define GATE_ICG2(_id, _name, _parent, _shift) \
+ GATE_ICG2_FLAGS(_id, _name, _parent, _shift, 0)
+
+#define GATE_ICG2_FLAGS(_id, _name, _parent, _shift, _flags) { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _parent, \
+ .regs = &infra2_cg_regs, \
+ .shift = _shift, \
+ .ops = &mtk_clk_gate_ops_setclr, \
+ .flags = _flags, \
}
+/*
+ * Clock gates dramc and dramc_b are needed by the DRAM controller.
+ * We mark them as critical as otherwise the system will hang after boot.
+ */
static const struct mtk_gate infra_clks[] = {
GATE_ICG0(CLK_INFRA_PMIC_TMR, "infra_pmic_tmr", "ulposc", 0),
GATE_ICG0(CLK_INFRA_PMIC_AP, "infra_pmic_ap", "pmicspi_sel", 1),
@@ -505,7 +521,8 @@ static const struct mtk_gate infra_clks[] = {
GATE_ICG1(CLK_INFRA_CCIF_AP, "infra_ccif_ap", "axi_sel", 23),
GATE_ICG1(CLK_INFRA_AUDIO, "infra_audio", "axi_sel", 25),
GATE_ICG1(CLK_INFRA_CCIF_MD, "infra_ccif_md", "axi_sel", 26),
- GATE_ICG1(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m", "clk26m", 31),
+ GATE_ICG1_FLAGS(CLK_INFRA_DRAMC_F26M, "infra_dramc_f26m",
+ "clk26m", 31, CLK_IS_CRITICAL),
GATE_ICG2(CLK_INFRA_I2C4, "infra_i2c4", "axi_sel", 0),
GATE_ICG2(CLK_INFRA_I2C_APPM, "infra_i2c_appm", "axi_sel", 1),
GATE_ICG2(CLK_INFRA_I2C_GPUPM, "infra_i2c_gpupm", "axi_sel", 2),
@@ -516,7 +533,8 @@ static const struct mtk_gate infra_clks[] = {
GATE_ICG2(CLK_INFRA_I2C5, "infra_i2c5", "axi_sel", 7),
GATE_ICG2(CLK_INFRA_SYS_CIRQ, "infra_sys_cirq", "axi_sel", 8),
GATE_ICG2(CLK_INFRA_SPI1, "infra_spi1", "spi_sel", 10),
- GATE_ICG2(CLK_INFRA_DRAMC_B_F26M, "infra_dramc_b_f26m", "clk26m", 11),
+ GATE_ICG2_FLAGS(CLK_INFRA_DRAMC_B_F26M, "infra_dramc_b_f26m",
+ "clk26m", 11, CLK_IS_CRITICAL),
GATE_ICG2(CLK_INFRA_ANC_MD32, "infra_anc_md32", "anc_md32_sel", 12),
GATE_ICG2(CLK_INFRA_ANC_MD32_32K, "infra_anc_md32_32k", "clk26m", 13),
GATE_ICG2(CLK_INFRA_DVFS_SPM1, "infra_dvfs_spm1", "axi_sel", 15),