arm: am33xx: Add support for mulitiple PLL input frequencies

am335x supports various sysclk frequencies which can be determined
using sysboot pins. PLLs should be configures based on this
sysclk frequency. Add PLL configurations for all supported
frequencies.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

2 files changed, 52 insertions, 43 deletions

diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index 45c96ce..3e81521 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -256,24 +256,62 @@ int spl_start_uboot(void)
 }
 #endif
 
-#define OSC	(V_OSCK/1000000)
-const struct dpll_params dpll_ddr = {
-		266, OSC-1, 1, -1, -1, -1, -1};
-const struct dpll_params dpll_ddr_evm_sk = {
-		303, OSC-1, 1, -1, -1, -1, -1};
-const struct dpll_params dpll_ddr_bone_black = {
-		400, OSC-1, 1, -1, -1, -1, -1};
-
 const struct dpll_params *get_dpll_ddr_params(void)
 {
+	int ind = get_sys_clk_index();
+
 	if (board_is_evm_sk())
-		return &dpll_ddr_evm_sk;
+		return &dpll_ddr3_303MHz[ind];
 	else if (board_is_bone_lt() || board_is_icev2())
-		return &dpll_ddr_bone_black;
+		return &dpll_ddr3_400MHz[ind];
 	else if (board_is_evm_15_or_later())
-		return &dpll_ddr_evm_sk;
+		return &dpll_ddr3_303MHz[ind];
 	else
-		return &dpll_ddr;
+		return &dpll_ddr2_266MHz[ind];
+}
+
+static u8 bone_not_connected_to_ac_power(void)
+{
+	if (board_is_bone()) {
+		uchar pmic_status_reg;
+		if (tps65217_reg_read(TPS65217_STATUS,
+				      &pmic_status_reg))
+			return 1;
+		if (!(pmic_status_reg & TPS65217_PWR_SRC_AC_BITMASK)) {
+			puts("No AC power, switching to default OPP\n");
+			return 1;
+		}
+	}
+	return 0;
+}
+
+const struct dpll_params *get_dpll_mpu_params(void)
+{
+	int ind = get_sys_clk_index();
+	int freq = am335x_get_efuse_mpu_max_freq(cdev);
+
+	if (bone_not_connected_to_ac_power())
+		freq = MPUPLL_M_600;
+
+	if (board_is_bone_lt())
+		freq = MPUPLL_M_1000;
+
+	switch (freq) {
+	case MPUPLL_M_1000:
+		return &dpll_mpu_opp[ind][5];
+	case MPUPLL_M_800:
+		return &dpll_mpu_opp[ind][4];
+	case MPUPLL_M_720:
+		return &dpll_mpu_opp[ind][3];
+	case MPUPLL_M_600:
+		return &dpll_mpu_opp[ind][2];
+	case MPUPLL_M_500:
+		return &dpll_mpu_opp100;
+	case MPUPLL_M_300:
+		return &dpll_mpu_opp[ind][0];
+	}
+
+	return &dpll_mpu_opp[ind][0];
 }
 
 static void scale_vcores_bone(int freq)
@@ -294,16 +332,8 @@ static void scale_vcores_bone(int freq)
 	 * On Beaglebone White we need to ensure we have AC power
 	 * before increasing the frequency.
 	 */
-	if (board_is_bone()) {
-		uchar pmic_status_reg;
-		if (tps65217_reg_read(TPS65217_STATUS,
-				      &pmic_status_reg))
-			return;
-		if (!(pmic_status_reg & TPS65217_PWR_SRC_AC_BITMASK)) {
-			puts("No AC power, switching to default OPP\n");
-			freq = MPUPLL_M_600;
-		}
-	}
+	if (bone_not_connected_to_ac_power())
+		freq = MPUPLL_M_600;
 
 	/*
 	 * Override what we have detected since we know if we have
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index 2572029..f633e2f 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -49,8 +49,6 @@ void do_board_detect(void)
 
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 
-#define NUM_OPPS	6
-
 const struct dpll_params dpll_mpu[NUM_CRYSTAL_FREQ][NUM_OPPS] = {
 	{	/* 19.2 MHz */
 		{125, 3, 2, -1, -1, -1, -1},	/* OPP 50 */
@@ -317,25 +315,6 @@ void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size)
 	return;
 }
 
-/*
- * get_sys_clk_index : returns the index of the sys_clk read from
- *			ctrl status register. This value is either
- *			read from efuse or sysboot pins.
- */
-static u32 get_sys_clk_index(void)
-{
-	struct ctrl_stat *ctrl = (struct ctrl_stat *)CTRL_BASE;
-	u32 ind = readl(&ctrl->statusreg), src;
-
-	src = (ind & CTRL_CRYSTAL_FREQ_SRC_MASK) >> CTRL_CRYSTAL_FREQ_SRC_SHIFT;
-	if (src == CTRL_CRYSTAL_FREQ_SRC_EFUSE) /* Value read from EFUSE */
-		return ((ind & CTRL_CRYSTAL_FREQ_SELECTION_MASK) >>
-			CTRL_CRYSTAL_FREQ_SELECTION_SHIFT);
-	else /* Value read from SYS BOOT pins */
-		return ((ind & CTRL_SYSBOOT_15_14_MASK) >>
-			CTRL_SYSBOOT_15_14_SHIFT);
-}
-
 const struct dpll_params *get_dpll_ddr_params(void)
 {
 	int ind = get_sys_clk_index();