NPCM7xx/NPCM8xx default is boot from flash. removed set clock feature due to reliability and security. the clock will set by bootblock or tip.
Signed-off-by: Jim Liu JJLIU0@nuvoton.com --- drivers/spi/npcm_fiu_spi.c | 72 +++++++++++++++++++++++++++++++------- 1 file changed, 59 insertions(+), 13 deletions(-)
diff --git a/drivers/spi/npcm_fiu_spi.c b/drivers/spi/npcm_fiu_spi.c index 7000fe5860..73c506442a 100644 --- a/drivers/spi/npcm_fiu_spi.c +++ b/drivers/spi/npcm_fiu_spi.c @@ -11,6 +11,7 @@ #include <linux/bitfield.h> #include <linux/log2.h> #include <linux/iopoll.h> +#include <power/regulator.h>
#define DW_SIZE 4 #define CHUNK_SIZE 16 @@ -34,6 +35,34 @@ #define UMA_CTS_RDYST BIT(24) #define UMA_CTS_DEV_NUM_MASK GENMASK(9, 8)
+/* Direct Write Configuration Register */ +#define DWR_CFG_WBURST_MASK GENMASK(25, 24) +#define DWR_CFG_ADDSIZ_MASK GENMASK(17, 16) +#define DWR_CFG_ABPCK_MASK GENMASK(11, 10) +#define DRW_CFG_DBPCK_MASK GENMASK(9, 8) +#define DRW_CFG_WRCMD 2 +enum { + DWR_WBURST_1_BYTE, + DWR_WBURST_16_BYTE = 3, +}; + +enum { + DWR_ADDSIZ_24_BIT, + DWR_ADDSIZ_32_BIT, +}; + +enum { + DWR_ABPCK_BIT_PER_CLK, + DWR_ABPCK_2_BIT_PER_CLK, + DWR_ABPCK_4_BIT_PER_CLK, +}; + +enum { + DWR_DBPCK_BIT_PER_CLK, + DWR_DBPCK_2_BIT_PER_CLK, + DWR_DBPCK_4_BIT_PER_CLK, +}; + struct npcm_fiu_regs { unsigned int drd_cfg; unsigned int dwr_cfg; @@ -67,19 +96,10 @@ struct npcm_fiu_regs {
struct npcm_fiu_priv { struct npcm_fiu_regs *regs; - struct clk clk; };
static int npcm_fiu_spi_set_speed(struct udevice *bus, uint speed) { - struct npcm_fiu_priv *priv = dev_get_priv(bus); - int ret; - - debug("%s: set speed %u\n", bus->name, speed); - ret = clk_set_rate(&priv->clk, speed); - if (ret < 0) - return ret; - return 0; }
@@ -349,13 +369,38 @@ static int npcm_fiu_exec_op(struct spi_slave *slave, static int npcm_fiu_spi_probe(struct udevice *bus) { struct npcm_fiu_priv *priv = dev_get_priv(bus); - int ret; + struct udevice *vqspi_supply; + int vqspi_uv;
priv->regs = (struct npcm_fiu_regs *)dev_read_addr_ptr(bus);
- ret = clk_get_by_index(bus, 0, &priv->clk); - if (ret < 0) - return ret; + if (IS_ENABLED(CONFIG_DM_REGULATOR)) { + device_get_supply_regulator(bus, "vqspi-supply", &vqspi_supply); + vqspi_uv = dev_read_u32_default(bus, "vqspi-microvolt", 0); + /* Set IO voltage */ + if (vqspi_supply && vqspi_uv) + regulator_set_value(vqspi_supply, vqspi_uv); + } + + return 0; +} + +static int npcm_fiu_spi_bind(struct udevice *bus) +{ + struct npcm_fiu_regs *regs; + + if (dev_read_bool(bus, "nuvoton,spix-mode")) { + regs = dev_read_addr_ptr(bus); + if (!regs) + return -EINVAL; + + /* Setup direct write cfg for SPIX */ + writel(FIELD_PREP(DWR_CFG_WBURST_MASK, DWR_WBURST_16_BYTE) | + FIELD_PREP(DWR_CFG_ADDSIZ_MASK, DWR_ADDSIZ_24_BIT) | + FIELD_PREP(DWR_CFG_ABPCK_MASK, DWR_ABPCK_4_BIT_PER_CLK) | + FIELD_PREP(DRW_CFG_DBPCK_MASK, DWR_DBPCK_4_BIT_PER_CLK) | + DRW_CFG_WRCMD, ®s->dwr_cfg); + }
return 0; } @@ -384,4 +429,5 @@ U_BOOT_DRIVER(npcm_fiu_spi) = { .ops = &npcm_fiu_spi_ops, .priv_auto = sizeof(struct npcm_fiu_priv), .probe = npcm_fiu_spi_probe, + .bind = npcm_fiu_spi_bind, };