[U-Boot] [PATCH 1/4] ARC: HSDK: CGU: update AXI, TUN, ARC clock options
Eugeniy Paltsev
Eugeniy.Paltsev at synopsys.com
Tue Jan 16 17:44:25 UTC 2018
Update default AXI, TUN, ARC clock set options:
instead of changing only idiv divider settings adjust also domain PLL
settings.
Add support of TUN_ROM and TUN_PWM clocks (subclocks of TUNN_PLL)
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
---
drivers/clk/clk-hsdk-cgu.c | 169 ++++++++++++++++++++++++++++--
include/dt-bindings/clock/snps,hsdk-cgu.h | 8 +-
2 files changed, 168 insertions(+), 9 deletions(-)
diff --git a/drivers/clk/clk-hsdk-cgu.c b/drivers/clk/clk-hsdk-cgu.c
index c80f90e..d9da477 100644
--- a/drivers/clk/clk-hsdk-cgu.c
+++ b/drivers/clk/clk-hsdk-cgu.c
@@ -42,7 +42,9 @@
* |-->| TUNNEL PLL |
* | --------------
* | |
- * | |-->|CGU_TUN_IDIV|----------->
+ * | |-->|CGU_TUN_IDIV_TUN|----------->
+ * | |-->|CGU_TUN_IDIV_ROM|----------->
+ * | |-->|CGU_TUN_IDIV_PWM|----------->
* |
* | ------------
* |-->| HDMI PLL |
@@ -60,7 +62,9 @@
DECLARE_GLOBAL_DATA_PTR;
#define CGU_ARC_IDIV 0x080
-#define CGU_TUN_IDIV 0x380
+#define CGU_TUN_IDIV_TUN 0x380
+#define CGU_TUN_IDIV_ROM 0x390
+#define CGU_TUN_IDIV_PWM 0x3A0
#define CGU_HDMI_IDIV_APB 0x480
#define CGU_SYS_IDIV_APB 0x180
#define CGU_SYS_IDIV_AXI 0x190
@@ -114,8 +118,68 @@ DECLARE_GLOBAL_DATA_PTR;
#define CREG_CORE_IF_CLK_DIV_1 0x0
#define CREG_CORE_IF_CLK_DIV_2 0x1
+#define MIN_PLL_RATE 100000000 /* 100 MHz */
#define PARENT_RATE 33333333 /* fixed clock - xtal */
-#define CGU_MAX_CLOCKS 24
+#define CGU_MAX_CLOCKS 26
+
+#define CGU_SYS_CLOCKS 16
+#define MAX_AXI_CLOCKS 4
+
+#define CGU_TUN_CLOCKS 3
+#define MAX_TUN_CLOCKS 6
+
+struct hsdk_tun_idiv_cfg {
+ u32 oft;
+ u8 val[MAX_TUN_CLOCKS];
+};
+
+struct hsdk_tun_clk_cfg {
+ const u32 clk_rate[MAX_TUN_CLOCKS];
+ const u32 pll_rate[MAX_TUN_CLOCKS];
+ const struct hsdk_tun_idiv_cfg idiv[CGU_TUN_CLOCKS];
+};
+
+static const struct hsdk_tun_clk_cfg tun_clk_cfg = {
+ { 25000000, 50000000, 75000000, 100000000, 125000000, 150000000 },
+ { 600000000, 600000000, 600000000, 600000000, 700000000, 600000000 }, {
+ { CGU_TUN_IDIV_TUN, { 24, 12, 8, 6, 6, 4 } },
+ { CGU_TUN_IDIV_ROM, { 4, 4, 4, 4, 5, 4 } },
+ { CGU_TUN_IDIV_PWM, { 8, 8, 8, 8, 10, 8 } }
+ }
+};
+
+struct hsdk_sys_idiv_cfg {
+ u32 oft;
+ u8 val[MAX_AXI_CLOCKS];
+};
+
+struct hsdk_axi_clk_cfg {
+ const u32 clk_rate[MAX_AXI_CLOCKS];
+ const u32 pll_rate[MAX_AXI_CLOCKS];
+ const struct hsdk_sys_idiv_cfg idiv[CGU_SYS_CLOCKS];
+};
+
+static const struct hsdk_axi_clk_cfg axi_clk_cfg = {
+ { 200000000, 400000000, 600000000, 800000000 },
+ { 800000000, 800000000, 600000000, 800000000 }, {
+ { CGU_SYS_IDIV_APB, { 4, 4, 3, 4 } }, /* APB */
+ { CGU_SYS_IDIV_AXI, { 4, 2, 1, 1 } }, /* AXI */
+ { CGU_SYS_IDIV_ETH, { 2, 2, 2, 2 } }, /* ETH */
+ { CGU_SYS_IDIV_USB, { 2, 2, 2, 2 } }, /* USB */
+ { CGU_SYS_IDIV_SDIO, { 2, 2, 2, 2 } }, /* SDIO */
+ { CGU_SYS_IDIV_HDMI, { 2, 2, 2, 2 } }, /* HDMI */
+ { CGU_SYS_IDIV_GFX_CORE, { 1, 1, 1, 1 } }, /* GPU-CORE */
+ { CGU_SYS_IDIV_GFX_DMA, { 2, 2, 2, 2 } }, /* GPU-DMA */
+ { CGU_SYS_IDIV_GFX_CFG, { 4, 4, 3, 4 } }, /* GPU-CFG */
+ { CGU_SYS_IDIV_DMAC_CORE,{ 2, 2, 2, 2 } }, /* DMAC-CORE */
+ { CGU_SYS_IDIV_DMAC_CFG, { 4, 4, 3, 4 } }, /* DMAC-CFG */
+ { CGU_SYS_IDIV_SDIO_REF, { 8, 8, 6, 8 } }, /* SDIO-REF */
+ { CGU_SYS_IDIV_SPI_REF, { 24, 24, 18, 24 } }, /* SPI-REF */
+ { CGU_SYS_IDIV_I2C_REF, { 4, 4, 3, 4 } }, /* I2C-REF */
+ { CGU_SYS_IDIV_UART_REF, { 24, 24, 18, 24 } }, /* UART-REF */
+ { CGU_SYS_IDIV_EBI_REF, { 16, 16, 12, 16 } } /* EBI-REF */
+ }
+};
struct hsdk_pll_cfg {
u32 rate;
@@ -201,6 +265,9 @@ static const struct hsdk_pll_devdata hdmi_pll_dat = {
};
static ulong idiv_set(struct clk *, ulong);
+static ulong cpu_clk_set(struct clk *, ulong);
+static ulong axi_clk_set(struct clk *, ulong);
+static ulong tun_clk_set(struct clk *, ulong);
static ulong idiv_get(struct clk *);
static int idiv_off(struct clk *);
static ulong pll_set(struct clk *, ulong);
@@ -218,11 +285,11 @@ struct hsdk_cgu_clock_map {
static const struct hsdk_cgu_clock_map clock_map[] = {
{ CGU_ARC_PLL, 0, 0, &core_pll_dat, pll_get, pll_set, NULL },
- { CGU_ARC_PLL, 0, CGU_ARC_IDIV, &core_pll_dat, idiv_get, idiv_set, idiv_off },
+ { CGU_ARC_PLL, 0, CGU_ARC_IDIV, &core_pll_dat, idiv_get, cpu_clk_set, idiv_off },
{ CGU_DDR_PLL, 0, 0, &sdt_pll_dat, pll_get, pll_set, NULL },
{ CGU_SYS_PLL, 0, 0, &sdt_pll_dat, pll_get, pll_set, NULL },
{ CGU_SYS_PLL, 0, CGU_SYS_IDIV_APB, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
- { CGU_SYS_PLL, 0, CGU_SYS_IDIV_AXI, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
+ { CGU_SYS_PLL, 0, CGU_SYS_IDIV_AXI, &sdt_pll_dat, idiv_get, axi_clk_set, idiv_off },
{ CGU_SYS_PLL, 0, CGU_SYS_IDIV_ETH, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
{ CGU_SYS_PLL, 0, CGU_SYS_IDIV_USB, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
{ CGU_SYS_PLL, 0, CGU_SYS_IDIV_SDIO, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
@@ -238,7 +305,9 @@ static const struct hsdk_cgu_clock_map clock_map[] = {
{ CGU_SYS_PLL, 0, CGU_SYS_IDIV_UART_REF, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
{ CGU_SYS_PLL, 0, CGU_SYS_IDIV_EBI_REF, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
{ CGU_TUN_PLL, 0, 0, &sdt_pll_dat, pll_get, pll_set, NULL },
- { CGU_TUN_PLL, 0, CGU_TUN_IDIV, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
+ { CGU_TUN_PLL, 0, CGU_TUN_IDIV_TUN, &sdt_pll_dat, idiv_get, tun_clk_set, idiv_off },
+ { CGU_TUN_PLL, 0, CGU_TUN_IDIV_ROM, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
+ { CGU_TUN_PLL, 0, CGU_TUN_IDIV_PWM, &sdt_pll_dat, idiv_get, idiv_set, idiv_off },
{ CGU_HDMI_PLL, 0, 0, &hdmi_pll_dat, pll_get, pll_set, NULL },
{ CGU_HDMI_PLL, 0, CGU_HDMI_IDIV_APB, &hdmi_pll_dat, idiv_get, idiv_set, idiv_off }
};
@@ -453,6 +522,94 @@ static ulong idiv_get(struct clk *sclk)
return parent_rate / div_factor;
}
+/* Special behavior: wen we set this clock we set both idiv and pll */
+static ulong cpu_clk_set(struct clk *sclk, ulong rate)
+{
+ ulong ret;
+
+ ret = pll_set(sclk, rate);
+ idiv_set(sclk, rate);
+
+ return ret;
+}
+
+/* Special behavior: wen we set this clock we set both idiv and pll and all pll dividers */
+static ulong axi_clk_set(struct clk *sclk, ulong rate)
+{
+ struct hsdk_cgu_clk *clk = dev_get_priv(sclk->dev);
+ ulong pll_rate;
+ int i, freq_idx = -1;
+ ulong ret = 0;
+
+ pll_rate = pll_get(sclk);
+
+ for (i = 0; i < MAX_AXI_CLOCKS; i++) {
+ if (axi_clk_cfg.clk_rate[i] == rate) {
+ freq_idx = i;
+ break;
+ }
+ }
+
+ if (freq_idx < 0) {
+ pr_err("axi clk: invalid rate=%ld Hz\n", rate);
+ return -EINVAL;
+ }
+
+ /* configure PLL before dividers */
+ if (axi_clk_cfg.pll_rate[freq_idx] < pll_rate)
+ ret = pll_set(sclk, axi_clk_cfg.pll_rate[freq_idx]);
+
+ /* configure SYS dividers */
+ for (i = 0; i < CGU_SYS_CLOCKS; i++) {
+ clk->idiv_regs = clk->cgu_regs + axi_clk_cfg.idiv[i].oft;
+ hsdk_idiv_write(clk, axi_clk_cfg.idiv[i].val[freq_idx]);
+ }
+
+ /* configure PLL after dividers */
+ if (axi_clk_cfg.pll_rate[freq_idx] >= pll_rate)
+ ret = pll_set(sclk, axi_clk_cfg.pll_rate[freq_idx]);
+
+ return ret;
+}
+
+static ulong tun_clk_set(struct clk *sclk, ulong rate)
+{
+ struct hsdk_cgu_clk *clk = dev_get_priv(sclk->dev);
+ ulong pll_rate;
+ int i, freq_idx = -1;
+ ulong ret = 0;
+
+ pll_rate = pll_get(sclk);
+
+ for (i = 0; i < MAX_TUN_CLOCKS; i++) {
+ if (tun_clk_cfg.clk_rate[i] == rate) {
+ freq_idx = i;
+ break;
+ }
+ }
+
+ if (freq_idx < 0) {
+ pr_err("tun clk: invalid rate=%ld Hz\n", rate);
+ return -EINVAL;
+ }
+
+ /* configure PLL before dividers */
+ if (tun_clk_cfg.pll_rate[freq_idx] < pll_rate)
+ ret = pll_set(sclk, tun_clk_cfg.pll_rate[freq_idx]);
+
+ /* configure SYS dividers */
+ for (i = 0; i < CGU_TUN_CLOCKS; i++) {
+ clk->idiv_regs = clk->cgu_regs + tun_clk_cfg.idiv[i].oft;
+ hsdk_idiv_write(clk, tun_clk_cfg.idiv[i].val[freq_idx]);
+ }
+
+ /* configure PLL after dividers */
+ if (tun_clk_cfg.pll_rate[freq_idx] >= pll_rate)
+ ret = pll_set(sclk, tun_clk_cfg.pll_rate[freq_idx]);
+
+ return ret;
+}
+
static ulong idiv_set(struct clk *sclk, ulong rate)
{
struct hsdk_cgu_clk *clk = dev_get_priv(sclk->dev);
diff --git a/include/dt-bindings/clock/snps,hsdk-cgu.h b/include/dt-bindings/clock/snps,hsdk-cgu.h
index 813ab71..2cfe34e 100644
--- a/include/dt-bindings/clock/snps,hsdk-cgu.h
+++ b/include/dt-bindings/clock/snps,hsdk-cgu.h
@@ -33,8 +33,10 @@
#define CLK_SYS_UART_REF 18
#define CLK_SYS_EBI_REF 19
#define CLK_TUN_PLL 20
-#define CLK_TUN 21
-#define CLK_HDMI_PLL 22
-#define CLK_HDMI 23
+#define CLK_TUN_TUN 21
+#define CLK_TUN_ROM 22
+#define CLK_TUN_PWM 23
+#define CLK_HDMI_PLL 24
+#define CLK_HDMI 25
#endif /* __DT_BINDINGS_CLK_HSDK_CGU_H_ */
--
2.9.3
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