Apparently, members of clk_bit_info array do not map correctly to the members of enum periph_id. This mapping got broken after we changed periph_id(s) to reflect interrupt number instead of their position in a sequence. This patch intends to fix above mentioned issue.
Signed-off-by: Akshay Saraswat akshay.s@samsung.com --- arch/arm/cpu/armv7/exynos/clock.c | 81 ++++++++++++++++++++++++--------------- 1 file changed, 50 insertions(+), 31 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index b31c13b..863974a 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -20,42 +20,49 @@ * positions of the peripheral clocks of the src and div registers */ struct clk_bit_info { + enum periph_id id; int8_t src_bit; int8_t div_bit; int8_t prediv_bit; };
-/* src_bit div_bit prediv_bit */ +/* periph_id src_bit div_bit prediv_bit */ static struct clk_bit_info clk_bit_info[] = { - {0, 0, -1}, - {4, 4, -1}, - {8, 8, -1}, - {12, 12, -1}, - {0, 0, 8}, - {4, 16, 24}, - {8, 0, 8}, - {12, 16, 24}, - {-1, -1, -1}, - {16, 0, 8}, - {20, 16, 24}, - {24, 0, 8}, - {0, 0, 4}, - {4, 12, 16}, - {-1, -1, -1}, - {-1, -1, -1}, - {-1, 24, 0}, - {-1, 24, 0}, - {-1, 24, 0}, - {-1, 24, 0}, - {-1, 24, 0}, - {-1, 24, 0}, - {-1, 24, 0}, - {-1, 24, 0}, - {24, 0, -1}, - {24, 0, -1}, - {24, 0, -1}, - {24, 0, -1}, - {24, 0, -1}, + {PERIPH_ID_UART0, 0, 0, -1}, + {PERIPH_ID_UART1, 4, 4, -1}, + {PERIPH_ID_UART2, 8, 8, -1}, + {PERIPH_ID_UART3, 12, 12, -1}, + {PERIPH_ID_I2C0, -1, 24, 0}, + {PERIPH_ID_I2C1, -1, 24, 0}, + {PERIPH_ID_I2C2, -1, 24, 0}, + {PERIPH_ID_I2C3, -1, 24, 0}, + {PERIPH_ID_I2C4, -1, 24, 0}, + {PERIPH_ID_I2C5, -1, 24, 0}, + {PERIPH_ID_I2C6, -1, 24, 0}, + {PERIPH_ID_I2C7, -1, 24, 0}, + {PERIPH_ID_SPI0, 16, 0, 8}, + {PERIPH_ID_SPI1, 20, 16, 24}, + {PERIPH_ID_SPI2, 24, 0, 8}, + {PERIPH_ID_SDMMC0, 0, 0, 8}, + {PERIPH_ID_SDMMC1, 4, 16, 24}, + {PERIPH_ID_SDMMC2, 8, 0, 8}, + {PERIPH_ID_SDMMC3, 12, 16, 24}, + {PERIPH_ID_I2C8, -1, -1, -1}, + {PERIPH_ID_I2C9, -1, -1, -1}, + {PERIPH_ID_I2S0, 0, 0, 4}, + {PERIPH_ID_I2S1, 4, 12, 16}, + {PERIPH_ID_SROMC, -1, -1, -1}, + {PERIPH_ID_SPI3, 0, 0, 4}, + {PERIPH_ID_SPI4, 4, 12, 16}, + {PERIPH_ID_SDMMC4, 16, 0, 8}, + {PERIPH_ID_PWM0, 24, 0, -1}, + {PERIPH_ID_PWM1, 24, 0, -1}, + {PERIPH_ID_PWM2, 24, 0, -1}, + {PERIPH_ID_PWM3, 24, 0, -1}, + {PERIPH_ID_PWM4, 24, 0, -1}, + {PERIPH_ID_I2C10, -1, -1, -1}, + + {PERIPH_ID_NONE, -1, -1, -1}, };
/* Epll Clock division values to achive different frequency output */ @@ -260,9 +267,21 @@ static unsigned long exynos5_get_pll_clk(int pllreg) return fout; }
+static struct clk_bit_info *get_clk_bit_info(int peripheral) +{ + int i; + + for (i = 0; exynos5_bit_info[i].id != PERIPH_ID_NONE; i++) { + if (exynos5_bit_info[i].id == peripheral) + break; + } + + return &exynos5_bit_info[i]; +} + static unsigned long exynos5_get_periph_rate(int peripheral) { - struct clk_bit_info *bit_info = &clk_bit_info[peripheral]; + struct clk_bit_info *bit_info = get_clk_bit_info(peripheral); unsigned long sclk, sub_clk; unsigned int src, div, sub_div; struct exynos5_clock *clk =