[PATCH v2 03/14] clocks: qcs404: Add support for ethernet clocks

Sumit Garg
2023-02-01T14:03:01Z

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---
arch/arm/mach-snapdragon/clock-qcs404.c | 60 +++++++++++++++++++
.../include/mach/sysmap-qcs404.h | 14 +++++
2 files changed, 74 insertions(+)

diff --git a/arch/arm/mach-snapdragon/clock-qcs404.c b/arch/arm/mach-snapdragon/clock-qcs404.c
index 6fe92afe8d..b8f5691aae 100644
--- a/arch/arm/mach-snapdragon/clock-qcs404.c
+++ b/arch/arm/mach-snapdragon/clock-qcs404.c
@@ -18,6 +18,9 @@
/* GPLL0 clock control registers */
#define GPLL0_STATUS_ACTIVE BIT(31)

+#define CFG_CLK_SRC_GPLL1 BIT(8)
+#define GPLL1_STATUS_ACTIVE BIT(31)
+
static struct vote_clk gcc_blsp1_ahb_clk = {
.cbcr_reg = BLSP1_AHB_CBCR,
.ena_vote = APCS_CLOCK_BRANCH_ENA_VOTE,
@@ -47,6 +50,13 @@ static struct pll_vote_clk gpll0_vote_clk = {
.vote_bit = BIT(0),
};

+static struct pll_vote_clk gpll1_vote_clk = {
+ .status = GPLL1_STATUS,
+ .status_bit = GPLL1_STATUS_ACTIVE,
+ .ena_vote = APCS_GPLL_ENA_VOTE,
+ .vote_bit = BIT(1),
+};
+
static const struct bcr_regs usb30_master_regs = {
.cfg_rcgr = USB30_MASTER_CFG_RCGR,
.cmd_rcgr = USB30_MASTER_CMD_RCGR,
@@ -55,6 +65,22 @@ static const struct bcr_regs usb30_master_regs = {
.D = USB30_MASTER_D,
};

+static const struct bcr_regs emac_regs = {
+ .cfg_rcgr = EMAC_CFG_RCGR,
+ .cmd_rcgr = EMAC_CMD_RCGR,
+ .M = EMAC_M,
+ .N = EMAC_N,
+ .D = EMAC_D,
+};
+
+static const struct bcr_regs emac_ptp_regs = {
+ .cfg_rcgr = EMAC_PTP_CFG_RCGR,
+ .cmd_rcgr = EMAC_PTP_CMD_RCGR,
+ .M = EMAC_M,
+ .N = EMAC_N,
+ .D = EMAC_D,
+};
+
ulong msm_set_rate(struct clk *clk, ulong rate)
{
struct msm_clk_priv *priv = dev_get_priv(clk->dev);
@@ -79,6 +105,20 @@ ulong msm_set_rate(struct clk *clk, ulong rate)
case GCC_SDCC1_AHB_CLK:
clk_enable_cbc(priv->base + SDCC_AHB_CBCR(1));
break;
+ case GCC_ETH_RGMII_CLK:
+ if (rate == 250000000)
+ clk_rcg_set_rate_mnd(priv->base, &emac_regs, 2, 0, 0,
+ CFG_CLK_SRC_GPLL1);
+ else if (rate == 125000000)
+ clk_rcg_set_rate_mnd(priv->base, &emac_regs, 4, 0, 0,
+ CFG_CLK_SRC_GPLL1);
+ else if (rate == 50000000)
+ clk_rcg_set_rate_mnd(priv->base, &emac_regs, 10, 0, 0,
+ CFG_CLK_SRC_GPLL1);
+ else if (rate == 5000000)
+ clk_rcg_set_rate_mnd(priv->base, &emac_regs, 2, 1, 50,
+ CFG_CLK_SRC_GPLL1);
+ break;
default:
return 0;
}
@@ -111,6 +151,26 @@ int msm_enable(struct clk *clk)
case GCC_USB2A_PHY_SLEEP_CLK:
clk_enable_cbc(priv->base + USB_HS_PHY_CFG_AHB_CBCR);
break;
+ case GCC_ETH_PTP_CLK:
+ /* SPEED_1000: freq -> 250MHz */
+ clk_enable_cbc(priv->base + ETH_PTP_CBCR);
+ clk_enable_gpll0(priv->base, &gpll1_vote_clk);
+ clk_rcg_set_rate_mnd(priv->base, &emac_ptp_regs, 2, 0, 0,
+ CFG_CLK_SRC_GPLL1);
+ break;
+ case GCC_ETH_RGMII_CLK:
+ /* SPEED_1000: freq -> 250MHz */
+ clk_enable_cbc(priv->base + ETH_RGMII_CBCR);
+ clk_enable_gpll0(priv->base, &gpll1_vote_clk);
+ clk_rcg_set_rate_mnd(priv->base, &emac_regs, 2, 0, 0,
+ CFG_CLK_SRC_GPLL1);
+ break;
+ case GCC_ETH_SLAVE_AHB_CLK:
+ clk_enable_cbc(priv->base + ETH_SLAVE_AHB_CBCR);
+ break;
+ case GCC_ETH_AXI_CLK:
+ clk_enable_cbc(priv->base + ETH_AXI_CBCR);
+ break;
default:
return 0;
}
diff --git a/arch/arm/mach-snapdragon/include/mach/sysmap-qcs404.h b/arch/arm/mach-snapdragon/include/mach/sysmap-qcs404.h
index e448faad2d..8920c4ee8f 100644
--- a/arch/arm/mach-snapdragon/include/mach/sysmap-qcs404.h
+++ b/arch/arm/mach-snapdragon/include/mach/sysmap-qcs404.h
@@ -12,6 +12,7 @@

/* Clocks: (from CLK_CTL_BASE) */
#define GPLL0_STATUS (0x21000)
+#define GPLL1_STATUS (0x20000)
#define APCS_GPLL_ENA_VOTE (0x45000)
#define APCS_CLOCK_BRANCH_ENA_VOTE (0x45004)

@@ -54,4 +55,17 @@
#define USB2A_PHY_SLEEP_CBCR (0x4102C)
#define USB_HS_PHY_CFG_AHB_CBCR (0x41030)

+/* ETH controller clock control registers */
+#define ETH_PTP_CBCR (0x4e004)
+#define ETH_RGMII_CBCR (0x4e008)
+#define ETH_SLAVE_AHB_CBCR (0x4e00c)
+#define ETH_AXI_CBCR (0x4e010)
+#define EMAC_PTP_CMD_RCGR (0x4e014)
+#define EMAC_PTP_CFG_RCGR (0x4e018)
+#define EMAC_CMD_RCGR (0x4e01c)
+#define EMAC_CFG_RCGR (0x4e020)
+#define EMAC_M (0x4e024)
+#define EMAC_N (0x4e028)
+#define EMAC_D (0x4e02c)
+
#endif
--
2.34.1