CMU_IS clock domain provides clocks for IS IP-core (Image Signal
Processing Subsystem). According to Exynos850 TRM, CMU_IS generates
CSIS, IPP, ITP, VRA and GDC clocks for BLK_IS.
This patch adds next clocks:
- bus clocks in CMU_TOP needed for CMU_IS
- all internal CMU_IS clocks
- leaf clocks for IS IP-core, CSIS (Camera Serial Interface Slave),
D_TZPC (TrustZone Protection Controller), CSIS DMA, GDC (Geometric
Distortion Correction), IPP (Image Preprocessing Processing core),
ITP (Image Texture Processing core), MCSC (Multi-Channel Scaler),
VRA (Visual Recognition Accelerator), PPMU (Platform Performance
Monitoring Unit), SysMMU and SysReg
IS related gate clocks in CMU_TOP were marked as CLK_IS_CRITICAL,
because:
1. All of those have to be enabled in order to read
/sys/kernel/debug/clk/clk_summary file
2. When some user driver (e.g. exynos-sysmmu) disables some derived
leaf clock, it can lead to CMU_TOP clocks disable, which then makes
the system hang. To prevent that, the CLK_IS_CRITICAL flag is used,
as CLK_IGNORE_UNUSED is not enough.
Signed-off-by: Sam Protsenko <semen.protsenko@xxxxxxxxxx>
---
Changes in v2:
- (none)
drivers/clk/samsung/clk-exynos850.c | 199 ++++++++++++++++++++++++++++
1 file changed, 199 insertions(+)
diff --git a/drivers/clk/samsung/clk-exynos850.c b/drivers/clk/samsung/clk-exynos850.c
index c91984f3f14f..18a36d58101e 100644
--- a/drivers/clk/samsung/clk-exynos850.c
+++ b/drivers/clk/samsung/clk-exynos850.c
@@ -39,6 +39,10 @@
#define CLK_CON_MUX_MUX_CLKCMU_HSI_BUS 0x103c
#define CLK_CON_MUX_MUX_CLKCMU_HSI_MMC_CARD 0x1040
#define CLK_CON_MUX_MUX_CLKCMU_HSI_USB20DRD 0x1044
+#define CLK_CON_MUX_MUX_CLKCMU_IS_BUS 0x1048
+#define CLK_CON_MUX_MUX_CLKCMU_IS_GDC 0x104c
+#define CLK_CON_MUX_MUX_CLKCMU_IS_ITP 0x1050
+#define CLK_CON_MUX_MUX_CLKCMU_IS_VRA 0x1054
#define CLK_CON_MUX_MUX_CLKCMU_PERI_BUS 0x1070
#define CLK_CON_MUX_MUX_CLKCMU_PERI_IP 0x1074
#define CLK_CON_MUX_MUX_CLKCMU_PERI_UART 0x1078
@@ -52,6 +56,10 @@
#define CLK_CON_DIV_CLKCMU_HSI_BUS 0x1848
#define CLK_CON_DIV_CLKCMU_HSI_MMC_CARD 0x184c
#define CLK_CON_DIV_CLKCMU_HSI_USB20DRD 0x1850
+#define CLK_CON_DIV_CLKCMU_IS_BUS 0x1854
+#define CLK_CON_DIV_CLKCMU_IS_GDC 0x1858
+#define CLK_CON_DIV_CLKCMU_IS_ITP 0x185c
+#define CLK_CON_DIV_CLKCMU_IS_VRA 0x1860
#define CLK_CON_DIV_CLKCMU_PERI_BUS 0x187c
#define CLK_CON_DIV_CLKCMU_PERI_IP 0x1880
#define CLK_CON_DIV_CLKCMU_PERI_UART 0x1884
@@ -71,6 +79,10 @@
#define CLK_CON_GAT_GATE_CLKCMU_HSI_BUS 0x2044
#define CLK_CON_GAT_GATE_CLKCMU_HSI_MMC_CARD 0x2048
#define CLK_CON_GAT_GATE_CLKCMU_HSI_USB20DRD 0x204c
+#define CLK_CON_GAT_GATE_CLKCMU_IS_BUS 0x2050
+#define CLK_CON_GAT_GATE_CLKCMU_IS_GDC 0x2054
+#define CLK_CON_GAT_GATE_CLKCMU_IS_ITP 0x2058
+#define CLK_CON_GAT_GATE_CLKCMU_IS_VRA 0x205c
#define CLK_CON_GAT_GATE_CLKCMU_PERI_BUS 0x2080
#define CLK_CON_GAT_GATE_CLKCMU_PERI_IP 0x2084
#define CLK_CON_GAT_GATE_CLKCMU_PERI_UART 0x2088
@@ -95,6 +107,10 @@ static const unsigned long top_clk_regs[] __initconst = {
CLK_CON_MUX_MUX_CLKCMU_HSI_BUS,
CLK_CON_MUX_MUX_CLKCMU_HSI_MMC_CARD,
CLK_CON_MUX_MUX_CLKCMU_HSI_USB20DRD,
+ CLK_CON_MUX_MUX_CLKCMU_IS_BUS,
+ CLK_CON_MUX_MUX_CLKCMU_IS_GDC,
+ CLK_CON_MUX_MUX_CLKCMU_IS_ITP,
+ CLK_CON_MUX_MUX_CLKCMU_IS_VRA,
CLK_CON_MUX_MUX_CLKCMU_PERI_BUS,
CLK_CON_MUX_MUX_CLKCMU_PERI_IP,
CLK_CON_MUX_MUX_CLKCMU_PERI_UART,
@@ -108,6 +124,10 @@ static const unsigned long top_clk_regs[] __initconst = {
CLK_CON_DIV_CLKCMU_HSI_BUS,
CLK_CON_DIV_CLKCMU_HSI_MMC_CARD,
CLK_CON_DIV_CLKCMU_HSI_USB20DRD,
+ CLK_CON_DIV_CLKCMU_IS_BUS,
+ CLK_CON_DIV_CLKCMU_IS_GDC,
+ CLK_CON_DIV_CLKCMU_IS_ITP,
+ CLK_CON_DIV_CLKCMU_IS_VRA,
CLK_CON_DIV_CLKCMU_PERI_BUS,
CLK_CON_DIV_CLKCMU_PERI_IP,
CLK_CON_DIV_CLKCMU_PERI_UART,
@@ -127,6 +147,10 @@ static const unsigned long top_clk_regs[] __initconst = {
CLK_CON_GAT_GATE_CLKCMU_HSI_BUS,
CLK_CON_GAT_GATE_CLKCMU_HSI_MMC_CARD,
CLK_CON_GAT_GATE_CLKCMU_HSI_USB20DRD,
+ CLK_CON_GAT_GATE_CLKCMU_IS_BUS,
+ CLK_CON_GAT_GATE_CLKCMU_IS_GDC,
+ CLK_CON_GAT_GATE_CLKCMU_IS_ITP,
+ CLK_CON_GAT_GATE_CLKCMU_IS_VRA,
CLK_CON_GAT_GATE_CLKCMU_PERI_BUS,
CLK_CON_GAT_GATE_CLKCMU_PERI_IP,
CLK_CON_GAT_GATE_CLKCMU_PERI_UART,
@@ -176,6 +200,15 @@ PNAME(mout_hsi_mmc_card_p) = { "oscclk", "dout_shared0_div2",
"oscclk", "oscclk" };
PNAME(mout_hsi_usb20drd_p) = { "oscclk", "dout_shared0_div4",
"dout_shared1_div4", "oscclk" };
+/* List of parent clocks for Muxes in CMU_TOP: for CMU_IS */
+PNAME(mout_is_bus_p) = { "dout_shared0_div2", "dout_shared1_div2",
+ "dout_shared0_div3", "dout_shared1_div3" };
+PNAME(mout_is_itp_p) = { "dout_shared0_div2", "dout_shared1_div2",
+ "dout_shared0_div3", "dout_shared1_div3" };
+PNAME(mout_is_vra_p) = { "dout_shared0_div2", "dout_shared1_div2",
+ "dout_shared0_div3", "dout_shared1_div3" };
+PNAME(mout_is_gdc_p) = { "dout_shared0_div2", "dout_shared1_div2",
+ "dout_shared0_div3", "dout_shared1_div3" };
/* List of parent clocks for Muxes in CMU_TOP: for CMU_PERI */
PNAME(mout_peri_bus_p) = { "dout_shared0_div4", "dout_shared1_div4" };
PNAME(mout_peri_uart_p) = { "oscclk", "dout_shared0_div4",
@@ -225,6 +258,16 @@ static const struct samsung_mux_clock top_mux_clks[] __initconst = {
MUX(CLK_MOUT_HSI_USB20DRD, "mout_hsi_usb20drd", mout_hsi_usb20drd_p,
CLK_CON_MUX_MUX_CLKCMU_HSI_USB20DRD, 0, 2),
+ /* IS */
+ MUX(CLK_MOUT_IS_BUS, "mout_is_bus", mout_is_bus_p,
+ CLK_CON_MUX_MUX_CLKCMU_IS_BUS, 0, 2),
+ MUX(CLK_MOUT_IS_ITP, "mout_is_itp", mout_is_itp_p,
+ CLK_CON_MUX_MUX_CLKCMU_IS_ITP, 0, 2),
+ MUX(CLK_MOUT_IS_VRA, "mout_is_vra", mout_is_vra_p,
+ CLK_CON_MUX_MUX_CLKCMU_IS_VRA, 0, 2),
+ MUX(CLK_MOUT_IS_GDC, "mout_is_gdc", mout_is_gdc_p,
+ CLK_CON_MUX_MUX_CLKCMU_IS_GDC, 0, 2),
+
/* PERI */
MUX(CLK_MOUT_PERI_BUS, "mout_peri_bus", mout_peri_bus_p,
CLK_CON_MUX_MUX_CLKCMU_PERI_BUS, 0, 1),
@@ -279,6 +322,16 @@ static const struct samsung_div_clock top_div_clks[] __initconst = {
DIV(CLK_DOUT_HSI_USB20DRD, "dout_hsi_usb20drd", "gout_hsi_usb20drd",
CLK_CON_DIV_CLKCMU_HSI_USB20DRD, 0, 4),
+ /* IS */
+ DIV(CLK_DOUT_IS_BUS, "dout_is_bus", "gout_is_bus",
+ CLK_CON_DIV_CLKCMU_IS_BUS, 0, 4),
+ DIV(CLK_DOUT_IS_ITP, "dout_is_itp", "gout_is_itp",
+ CLK_CON_DIV_CLKCMU_IS_ITP, 0, 4),
+ DIV(CLK_DOUT_IS_VRA, "dout_is_vra", "gout_is_vra",
+ CLK_CON_DIV_CLKCMU_IS_VRA, 0, 4),
+ DIV(CLK_DOUT_IS_GDC, "dout_is_gdc", "gout_is_gdc",
+ CLK_CON_DIV_CLKCMU_IS_GDC, 0, 4),
+
/* PERI */
DIV(CLK_DOUT_PERI_BUS, "dout_peri_bus", "gout_peri_bus",
CLK_CON_DIV_CLKCMU_PERI_BUS, 0, 4),
@@ -319,6 +372,17 @@ static const struct samsung_gate_clock top_gate_clks[] __initconst = {
GATE(CLK_GOUT_HSI_USB20DRD, "gout_hsi_usb20drd", "mout_hsi_usb20drd",
CLK_CON_GAT_GATE_CLKCMU_HSI_USB20DRD, 21, 0, 0),
+ /* IS */
+ /* TODO: These clocks have to be always enabled to access CMU_IS regs */
+ GATE(CLK_GOUT_IS_BUS, "gout_is_bus", "mout_is_bus",
+ CLK_CON_GAT_GATE_CLKCMU_IS_BUS, 21, CLK_IS_CRITICAL, 0),
+ GATE(CLK_GOUT_IS_ITP, "gout_is_itp", "mout_is_itp",
+ CLK_CON_GAT_GATE_CLKCMU_IS_ITP, 21, CLK_IS_CRITICAL, 0),
+ GATE(CLK_GOUT_IS_VRA, "gout_is_vra", "mout_is_vra",
+ CLK_CON_GAT_GATE_CLKCMU_IS_VRA, 21, CLK_IS_CRITICAL, 0),
+ GATE(CLK_GOUT_IS_GDC, "gout_is_gdc", "mout_is_gdc",
+ CLK_CON_GAT_GATE_CLKCMU_IS_GDC, 21, CLK_IS_CRITICAL, 0),
+
/* PERI */
GATE(CLK_GOUT_PERI_BUS, "gout_peri_bus", "mout_peri_bus",
CLK_CON_GAT_GATE_CLKCMU_PERI_BUS, 21, 0, 0),
@@ -952,6 +1016,138 @@ static const struct samsung_cmu_info hsi_cmu_info __initconst = {
.clk_name = "dout_hsi_bus",
};
+/* ---- CMU_IS -------------------------------------------------------------- */
+
+#define PLL_CON0_MUX_CLKCMU_IS_BUS_USER 0x0600
+#define PLL_CON0_MUX_CLKCMU_IS_GDC_USER 0x0610
+#define PLL_CON0_MUX_CLKCMU_IS_ITP_USER 0x0620
+#define PLL_CON0_MUX_CLKCMU_IS_VRA_USER 0x0630
+#define CLK_CON_DIV_DIV_CLK_IS_BUSP 0x1800
+#define CLK_CON_GAT_CLK_IS_CMU_IS_PCLK 0x2000
+#define CLK_CON_GAT_GOUT_IS_CSIS0_ACLK 0x2040
+#define CLK_CON_GAT_GOUT_IS_CSIS1_ACLK 0x2044
+#define CLK_CON_GAT_GOUT_IS_CSIS2_ACLK 0x2048
+#define CLK_CON_GAT_GOUT_IS_TZPC_PCLK 0x204c
+#define CLK_CON_GAT_GOUT_IS_CLK_CSIS_DMA 0x2050
+#define CLK_CON_GAT_GOUT_IS_CLK_GDC 0x2054
+#define CLK_CON_GAT_GOUT_IS_CLK_IPP 0x2058
+#define CLK_CON_GAT_GOUT_IS_CLK_ITP 0x205c
+#define CLK_CON_GAT_GOUT_IS_CLK_MCSC 0x2060
+#define CLK_CON_GAT_GOUT_IS_CLK_VRA 0x2064
+#define CLK_CON_GAT_GOUT_IS_PPMU_IS0_ACLK 0x2074
+#define CLK_CON_GAT_GOUT_IS_PPMU_IS0_PCLK 0x2078
+#define CLK_CON_GAT_GOUT_IS_PPMU_IS1_ACLK 0x207c
+#define CLK_CON_GAT_GOUT_IS_PPMU_IS1_PCLK 0x2080
+#define CLK_CON_GAT_GOUT_IS_SYSMMU_IS0_CLK_S1 0x2098
+#define CLK_CON_GAT_GOUT_IS_SYSMMU_IS1_CLK_S1 0x209c
+#define CLK_CON_GAT_GOUT_IS_SYSREG_PCLK 0x20a0
+
+static const unsigned long is_clk_regs[] __initconst = {
+ PLL_CON0_MUX_CLKCMU_IS_BUS_USER,
+ PLL_CON0_MUX_CLKCMU_IS_GDC_USER,
+ PLL_CON0_MUX_CLKCMU_IS_ITP_USER,
+ PLL_CON0_MUX_CLKCMU_IS_VRA_USER,
+ CLK_CON_DIV_DIV_CLK_IS_BUSP,
+ CLK_CON_GAT_CLK_IS_CMU_IS_PCLK,
+ CLK_CON_GAT_GOUT_IS_CSIS0_ACLK,
+ CLK_CON_GAT_GOUT_IS_CSIS1_ACLK,
+ CLK_CON_GAT_GOUT_IS_CSIS2_ACLK,
+ CLK_CON_GAT_GOUT_IS_TZPC_PCLK,
+ CLK_CON_GAT_GOUT_IS_CLK_CSIS_DMA,
+ CLK_CON_GAT_GOUT_IS_CLK_GDC,
+ CLK_CON_GAT_GOUT_IS_CLK_IPP,
+ CLK_CON_GAT_GOUT_IS_CLK_ITP,
+ CLK_CON_GAT_GOUT_IS_CLK_MCSC,
+ CLK_CON_GAT_GOUT_IS_CLK_VRA,
+ CLK_CON_GAT_GOUT_IS_PPMU_IS0_ACLK,
+ CLK_CON_GAT_GOUT_IS_PPMU_IS0_PCLK,
+ CLK_CON_GAT_GOUT_IS_PPMU_IS1_ACLK,
+ CLK_CON_GAT_GOUT_IS_PPMU_IS1_PCLK,
+ CLK_CON_GAT_GOUT_IS_SYSMMU_IS0_CLK_S1,
+ CLK_CON_GAT_GOUT_IS_SYSMMU_IS1_CLK_S1,
+ CLK_CON_GAT_GOUT_IS_SYSREG_PCLK,
+};
+
+/* List of parent clocks for Muxes in CMU_IS */
+PNAME(mout_is_bus_user_p) = { "oscclk", "dout_is_bus" };
+PNAME(mout_is_itp_user_p) = { "oscclk", "dout_is_itp" };
+PNAME(mout_is_vra_user_p) = { "oscclk", "dout_is_vra" };
+PNAME(mout_is_gdc_user_p) = { "oscclk", "dout_is_gdc" };
+
+static const struct samsung_mux_clock is_mux_clks[] __initconst = {
+ MUX(CLK_MOUT_IS_BUS_USER, "mout_is_bus_user", mout_is_bus_user_p,
+ PLL_CON0_MUX_CLKCMU_IS_BUS_USER, 4, 1),
+ MUX(CLK_MOUT_IS_ITP_USER, "mout_is_itp_user", mout_is_itp_user_p,
+ PLL_CON0_MUX_CLKCMU_IS_ITP_USER, 4, 1),
+ MUX(CLK_MOUT_IS_VRA_USER, "mout_is_vra_user", mout_is_vra_user_p,
+ PLL_CON0_MUX_CLKCMU_IS_VRA_USER, 4, 1),
+ MUX(CLK_MOUT_IS_GDC_USER, "mout_is_gdc_user", mout_is_gdc_user_p,
+ PLL_CON0_MUX_CLKCMU_IS_GDC_USER, 4, 1),
+};
+
+static const struct samsung_div_clock is_div_clks[] __initconst = {
+ DIV(CLK_DOUT_IS_BUSP, "dout_is_busp", "mout_is_bus_user",
+ CLK_CON_DIV_DIV_CLK_IS_BUSP, 0, 2),
+};
+
+static const struct samsung_gate_clock is_gate_clks[] __initconst = {
+ /* TODO: Should be enabled in IS driver */
+ GATE(CLK_GOUT_IS_CMU_IS_PCLK, "gout_is_cmu_is_pclk", "dout_is_busp",
+ CLK_CON_GAT_CLK_IS_CMU_IS_PCLK, 21, CLK_IGNORE_UNUSED, 0),
+ GATE(CLK_GOUT_IS_CSIS0_ACLK, "gout_is_csis0_aclk", "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_CSIS0_ACLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_CSIS1_ACLK, "gout_is_csis1_aclk", "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_CSIS1_ACLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_CSIS2_ACLK, "gout_is_csis2_aclk", "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_CSIS2_ACLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_TZPC_PCLK, "gout_is_tzpc_pclk", "dout_is_busp",
+ CLK_CON_GAT_GOUT_IS_TZPC_PCLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_CSIS_DMA_CLK, "gout_is_csis_dma_clk",
+ "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_CLK_CSIS_DMA, 21, 0, 0),
+ GATE(CLK_GOUT_IS_GDC_CLK, "gout_is_gdc_clk", "mout_is_gdc_user",
+ CLK_CON_GAT_GOUT_IS_CLK_GDC, 21, 0, 0),
+ GATE(CLK_GOUT_IS_IPP_CLK, "gout_is_ipp_clk", "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_CLK_IPP, 21, 0, 0),
+ GATE(CLK_GOUT_IS_ITP_CLK, "gout_is_itp_clk", "mout_is_itp_user",
+ CLK_CON_GAT_GOUT_IS_CLK_ITP, 21, 0, 0),
+ GATE(CLK_GOUT_IS_MCSC_CLK, "gout_is_mcsc_clk", "mout_is_itp_user",
+ CLK_CON_GAT_GOUT_IS_CLK_MCSC, 21, 0, 0),
+ GATE(CLK_GOUT_IS_VRA_CLK, "gout_is_vra_clk", "mout_is_vra_user",
+ CLK_CON_GAT_GOUT_IS_CLK_VRA, 21, 0, 0),
+ GATE(CLK_GOUT_IS_PPMU_IS0_ACLK, "gout_is_ppmu_is0_aclk",
+ "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_PPMU_IS0_ACLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_PPMU_IS0_PCLK, "gout_is_ppmu_is0_pclk", "dout_is_busp",
+ CLK_CON_GAT_GOUT_IS_PPMU_IS0_PCLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_PPMU_IS1_ACLK, "gout_is_ppmu_is1_aclk",
+ "mout_is_itp_user",
+ CLK_CON_GAT_GOUT_IS_PPMU_IS1_ACLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_PPMU_IS1_PCLK, "gout_is_ppmu_is1_pclk", "dout_is_busp",
+ CLK_CON_GAT_GOUT_IS_PPMU_IS1_PCLK, 21, 0, 0),
+ GATE(CLK_GOUT_IS_SYSMMU_IS0_CLK, "gout_is_sysmmu_is0_clk",
+ "mout_is_bus_user",
+ CLK_CON_GAT_GOUT_IS_SYSMMU_IS0_CLK_S1, 21, 0, 0),
+ GATE(CLK_GOUT_IS_SYSMMU_IS1_CLK, "gout_is_sysmmu_is1_clk",
+ "mout_is_itp_user",
+ CLK_CON_GAT_GOUT_IS_SYSMMU_IS1_CLK_S1, 21, 0, 0),
+ GATE(CLK_GOUT_IS_SYSREG_PCLK, "gout_is_sysreg_pclk", "dout_is_busp",
+ CLK_CON_GAT_GOUT_IS_SYSREG_PCLK, 21, 0, 0),
+};
+
+static const struct samsung_cmu_info is_cmu_info __initconst = {
+ .mux_clks = is_mux_clks,
+ .nr_mux_clks = ARRAY_SIZE(is_mux_clks),
+ .div_clks = is_div_clks,
+ .nr_div_clks = ARRAY_SIZE(is_div_clks),
+ .gate_clks = is_gate_clks,
+ .nr_gate_clks = ARRAY_SIZE(is_gate_clks),
+ .nr_clk_ids = IS_NR_CLK,
+ .clk_regs = is_clk_regs,
+ .nr_clk_regs = ARRAY_SIZE(is_clk_regs),
+ .clk_name = "dout_is_bus",
+};
+
/* ---- CMU_PERI ------------------------------------------------------------ */
/* Register Offset definitions for CMU_PERI (0x10030000) */
@@ -1334,6 +1530,9 @@ static const struct of_device_id exynos850_cmu_of_match[] = {
}, {
.compatible = "samsung,exynos850-cmu-hsi",
.data = &hsi_cmu_info,
+ }, {
+ .compatible = "samsung,exynos850-cmu-is",
+ .data = &is_cmu_info,
}, {
.compatible = "samsung,exynos850-cmu-core",
.data = &core_cmu_info,
--
2.30.2
