diff options
Diffstat (limited to 'drivers/spi/spi-nxp-fspi.c')
| -rw-r--r-- | drivers/spi/spi-nxp-fspi.c | 26 |
1 files changed, 7 insertions, 19 deletions
diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c index a66fa97046ee..2b0301fc971c 100644 --- a/drivers/spi/spi-nxp-fspi.c +++ b/drivers/spi/spi-nxp-fspi.c @@ -33,6 +33,7 @@ #include <linux/acpi.h> #include <linux/bitops.h> +#include <linux/bitfield.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> @@ -315,6 +316,7 @@ #define NXP_FSPI_MIN_IOMAP SZ_4M #define DCFG_RCWSR1 0x100 +#define SYS_PLL_RAT GENMASK(6, 2) /* Access flash memory using IP bus only */ #define FSPI_QUIRK_USE_IP_ONLY BIT(0) @@ -926,9 +928,8 @@ static void erratum_err050568(struct nxp_fspi *f) { .family = "QorIQ LS1028A" }, { /* sentinel */ } }; - struct device_node *np; struct regmap *map; - u32 val = 0, sysclk = 0; + u32 val, sys_pll_ratio; int ret; /* Check for LS1028A family */ @@ -937,7 +938,6 @@ static void erratum_err050568(struct nxp_fspi *f) return; } - /* Compute system clock frequency multiplier ratio */ map = syscon_regmap_lookup_by_compatible("fsl,ls1028a-dcfg"); if (IS_ERR(map)) { dev_err(f->dev, "No syscon regmap\n"); @@ -948,23 +948,11 @@ static void erratum_err050568(struct nxp_fspi *f) if (ret < 0) goto err; - /* Strap bits 6:2 define SYS_PLL_RAT i.e frequency multiplier ratio */ - val = (val >> 2) & 0x1F; - WARN(val == 0, "Strapping is zero: Cannot determine ratio"); + sys_pll_ratio = FIELD_GET(SYS_PLL_RAT, val); + dev_dbg(f->dev, "val: 0x%08x, sys_pll_ratio: %d\n", val, sys_pll_ratio); - /* Compute system clock frequency */ - np = of_find_node_by_name(NULL, "clock-sysclk"); - if (!np) - goto err; - - if (of_property_read_u32(np, "clock-frequency", &sysclk)) - goto err; - - sysclk = (sysclk * val) / 1000000; /* Convert sysclk to Mhz */ - dev_dbg(f->dev, "val: 0x%08x, sysclk: %dMhz\n", val, sysclk); - - /* Use IP bus only if PLL is 300MHz */ - if (sysclk == 300) + /* Use IP bus only if platform clock is 300MHz */ + if (sys_pll_ratio == 3) f->devtype_data->quirks |= FSPI_QUIRK_USE_IP_ONLY; return; |