diff options
Diffstat (limited to 'drivers/ram/k3-ddrss/k3-ddrss.c')
| -rw-r--r-- | drivers/ram/k3-ddrss/k3-ddrss.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c index 2467f122a8..e8b7aec9e0 100644 --- a/drivers/ram/k3-ddrss/k3-ddrss.c +++ b/drivers/ram/k3-ddrss/k3-ddrss.c @@ -30,7 +30,7 @@ #define CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS 0x80 #define CTRLMMR_DDR4_FSP_CLKCHNG_ACK_OFFS 0xc0 -#define DDRSS_V2A_R1_MAT_REG 0x0020 +#define DDRSS_V2A_CTL_REG 0x0020 #define DDRSS_ECC_CTRL_REG 0x0120 #define DDRSS_ECC_CTRL_REG_ECC_EN BIT(0) @@ -134,6 +134,7 @@ struct k3_ddrss_desc { struct power_domain ddrdata_pwrdmn; struct clk ddr_clk; struct clk osc_clk; + u32 ddr_freq0; u32 ddr_freq1; u32 ddr_freq2; u32 ddr_fhs_cnt; @@ -223,9 +224,7 @@ static void k3_lpddr4_freq_update(struct k3_ddrss_desc *ddrss) else if (req_type == 2) clk_set_rate(&ddrss->ddr_clk, ddrss->ddr_freq2); else if (req_type == 0) - /* Put DDR pll in bypass mode */ - clk_set_rate(&ddrss->ddr_clk, - clk_get_rate(&ddrss->osc_clk)); + clk_set_rate(&ddrss->ddr_clk, ddrss->ddr_freq0); else printf("%s: Invalid freq request type\n", __func__); @@ -276,8 +275,7 @@ static int k3_ddrss_init_freq(struct k3_ddrss_desc *ddrss) ret = clk_set_rate(&ddrss->ddr_clk, ddrss->ddr_freq1); break; case DENALI_CTL_0_DRAM_CLASS_LPDDR4: - /* Set to bypass frequency for LPDDR4*/ - ret = clk_set_rate(&ddrss->ddr_clk, clk_get_rate(&ddrss->osc_clk)); + ret = clk_set_rate(&ddrss->ddr_clk, ddrss->ddr_freq0); break; default: ret = -EINVAL; @@ -394,6 +392,13 @@ static int k3_ddrss_ofdata_to_priv(struct udevice *dev) ddrss->instance = 0; } + ret = dev_read_u32(dev, "ti,ddr-freq0", &ddrss->ddr_freq0); + if (ret) { + ddrss->ddr_freq0 = clk_get_rate(&ddrss->osc_clk); + dev_dbg(dev, + "ddr freq0 not populated, using bypass frequency.\n"); + } + ret = dev_read_u32(dev, "ti,ddr-freq1", &ddrss->ddr_freq1); if (ret) dev_err(dev, "ddr freq1 not populated %d\n", ret); @@ -620,8 +625,8 @@ static int k3_ddrss_probe(struct udevice *dev) return ret; #ifdef CONFIG_K3_AM64_DDRSS - - writel(0x000001EF, ddrss->ddrss_ss_cfg + DDRSS_V2A_R1_MAT_REG); + /* AM64x supports only up to 2 GB SDRAM */ + writel(0x000001EF, ddrss->ddrss_ss_cfg + DDRSS_V2A_CTL_REG); writel(0x0, ddrss->ddrss_ss_cfg + DDRSS_ECC_CTRL_REG); #endif |