ARM: k2g: Add support for dynamic programming of PLL based on SYSCLK

K2G supports various sysclk frequencies which can be
determined using sysboot pins. PLLs should be configured
based on this sysclock frequency. Add PLL configurations
for all supported sysclk frequencies.

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

1 files changed, 95 insertions, 21 deletions

diff --git a/board/ti/ks2_evm/board_k2g.c b/board/ti/ks2_evm/board_k2g.c
index 79e110e..2093342 100644
--- a/board/ti/ks2_evm/board_k2g.c
+++ b/board/ti/ks2_evm/board_k2g.c
@@ -16,6 +16,13 @@
 
 #define SYS_CLK		24000000
 
+const unsigned int sysclk_array[MAX_SYSCLK] = {
+	19200000,
+	24000000,
+	25000000,
+	26000000,
+};
+
 unsigned int external_clk[ext_clk_count] = {
 	[sys_clk]	=	SYS_CLK,
 	[pa_clk]	=	SYS_CLK,
@@ -48,49 +55,116 @@ static int dev_speeds[DEVSPEED_NUMSPDS] = {
 	SPD400,
 };
 
-static struct pll_init_data main_pll_config[NUM_SPDS] = {
-	[SPD400]	= {MAIN_PLL, 100, 3, 2},
-	[SPD600]	= {MAIN_PLL, 300, 6, 2},
-	[SPD800]	= {MAIN_PLL, 200, 3, 2},
-	[SPD900] =	{TETRIS_PLL, 75, 1, 2},
-	[SPD1000] =	{TETRIS_PLL, 250, 3, 2},
+static struct pll_init_data main_pll_config[MAX_SYSCLK][NUM_SPDS] = {
+	[SYSCLK_19MHz] = {
+		[SPD400]	= {MAIN_PLL, 125, 3, 2},
+		[SPD600]	= {MAIN_PLL, 125, 2, 2},
+		[SPD800]	= {MAIN_PLL, 250, 3, 2},
+		[SPD900]	= {TETRIS_PLL, 187, 2, 2},
+		[SPD1000]	= {TETRIS_PLL, 104, 1, 2},
+	},
+	[SYSCLK_24MHz] = {
+		[SPD400]	= {MAIN_PLL, 100, 3, 2},
+		[SPD600]	= {MAIN_PLL, 300, 6, 2},
+		[SPD800]	= {MAIN_PLL, 200, 3, 2},
+		[SPD900]	= {TETRIS_PLL, 75, 1, 2},
+		[SPD1000]	= {TETRIS_PLL, 250, 3, 2},
+	},
+	[SYSCLK_25MHz] = {
+		[SPD400]	= {MAIN_PLL, 32, 1, 2},
+		[SPD600]	= {MAIN_PLL, 48, 1, 2},
+		[SPD800]	= {MAIN_PLL, 64, 1, 2},
+		[SPD900]	= {TETRIS_PLL, 72, 1, 2},
+		[SPD1000]	= {TETRIS_PLL, 80, 1, 2},
+	},
+	[SYSCLK_26MHz] = {
+		[SPD400]	= {MAIN_PLL, 400, 13, 2},
+		[SPD600]	= {MAIN_PLL, 230, 5, 2},
+		[SPD800]	= {MAIN_PLL, 123, 2, 2},
+		[SPD900]	= {TETRIS_PLL, 69, 1, 2},
+		[SPD1000]	= {TETRIS_PLL, 384, 5, 2},
+	},
 };
 
-static struct pll_init_data tetris_pll_config[NUM_SPDS] = {
-	[SPD200] =	{TETRIS_PLL, 250, 3, 10},
-	[SPD400] =	{TETRIS_PLL, 100, 1, 6},
-	[SPD600] =	{TETRIS_PLL, 100, 1, 4},
-	[SPD800] =	{TETRIS_PLL, 400, 3, 4},
-	[SPD900] =	{TETRIS_PLL, 75, 1, 2},
-	[SPD1000] =	{TETRIS_PLL, 250, 3, 2},
+static struct pll_init_data tetris_pll_config[MAX_SYSCLK][NUM_SPDS] = {
+	[SYSCLK_19MHz] = {
+		[SPD200]	= {TETRIS_PLL, 625, 6, 10},
+		[SPD400]	= {TETRIS_PLL, 125, 1, 6},
+		[SPD600]	= {TETRIS_PLL, 125, 1, 4},
+		[SPD800]	= {TETRIS_PLL, 333, 2, 4},
+		[SPD900]	= {TETRIS_PLL, 187, 2, 2},
+		[SPD1000]	= {TETRIS_PLL, 104, 1, 2},
+	},
+	[SYSCLK_24MHz] = {
+		[SPD200]	= {TETRIS_PLL, 250, 3, 10},
+		[SPD400]	= {TETRIS_PLL, 100, 1, 6},
+		[SPD600]	= {TETRIS_PLL, 100, 1, 4},
+		[SPD800]	= {TETRIS_PLL, 400, 3, 4},
+		[SPD900]	= {TETRIS_PLL, 75, 1, 2},
+		[SPD1000]	= {TETRIS_PLL, 250, 3, 2},
+	},
+	[SYSCLK_25MHz] = {
+		[SPD200]	= {TETRIS_PLL, 80, 1, 10},
+		[SPD400]	= {TETRIS_PLL, 96, 1, 6},
+		[SPD600]	= {TETRIS_PLL, 96, 1, 4},
+		[SPD800]	= {TETRIS_PLL, 128, 1, 4},
+		[SPD900]	= {TETRIS_PLL, 72, 1, 2},
+		[SPD1000]	= {TETRIS_PLL, 80, 1, 2},
+	},
+	[SYSCLK_26MHz] = {
+		[SPD200]	= {TETRIS_PLL, 307, 4, 10},
+		[SPD400]	= {TETRIS_PLL, 369, 4, 6},
+		[SPD600]	= {TETRIS_PLL, 369, 4, 4},
+		[SPD800]	= {TETRIS_PLL, 123, 1, 4},
+		[SPD900]	= {TETRIS_PLL, 69, 1, 2},
+		[SPD1000]	= {TETRIS_PLL, 384, 5, 2},
+	},
+};
+
+static struct pll_init_data uart_pll_config[MAX_SYSCLK] = {
+	[SYSCLK_19MHz] = {UART_PLL, 160, 1, 8},
+	[SYSCLK_24MHz] = {UART_PLL, 128, 1, 8},
+	[SYSCLK_25MHz] = {UART_PLL, 768, 5, 10},
+	[SYSCLK_26MHz] = {UART_PLL, 384, 13, 2},
 };
 
-static struct pll_init_data uart_pll_config = {UART_PLL, 64, 1, 4};
-static struct pll_init_data nss_pll_config = {NSS_PLL, 250, 3, 2};
-static struct pll_init_data ddr3_pll_config = {DDR3A_PLL, 133, 1, 16};
+static struct pll_init_data nss_pll_config[MAX_SYSCLK] = {
+	[SYSCLK_19MHz] = {NSS_PLL, 625, 6, 2},
+	[SYSCLK_24MHz] = {NSS_PLL, 250, 3, 2},
+	[SYSCLK_25MHz] = {NSS_PLL, 80, 1, 2},
+	[SYSCLK_26MHz] = {NSS_PLL, 1000, 13, 2},
+};
+
+static struct pll_init_data ddr3_pll_config[MAX_SYSCLK] = {
+	[SYSCLK_19MHz] = {DDR3A_PLL, 167, 1, 16},
+	[SYSCLK_24MHz] = {DDR3A_PLL, 133, 1, 16},
+	[SYSCLK_25MHz] = {DDR3A_PLL, 128, 1, 16},
+	[SYSCLK_26MHz] = {DDR3A_PLL, 123, 1, 16},
+};
 
 struct pll_init_data *get_pll_init_data(int pll)
 {
 	int speed;
 	struct pll_init_data *data = NULL;
+	u8 sysclk_index = get_sysclk_index();
 
 	switch (pll) {
 	case MAIN_PLL:
 		speed = get_max_dev_speed(dev_speeds);
-		data = &main_pll_config[speed];
+		data = &main_pll_config[sysclk_index][speed];
 		break;
 	case TETRIS_PLL:
 		speed = get_max_arm_speed(arm_speeds);
-		data = &tetris_pll_config[speed];
+		data = &tetris_pll_config[sysclk_index][speed];
 		break;
 	case NSS_PLL:
-		data = &nss_pll_config;
+		data = &nss_pll_config[sysclk_index];
 		break;
 	case UART_PLL:
-		data = &uart_pll_config;
+		data = &uart_pll_config[sysclk_index];
 		break;
 	case DDR3_PLL:
-		data = &ddr3_pll_config;
+		data = &ddr3_pll_config[sysclk_index];
 		break;
 	default:
 		data = NULL;