On 13 July 2017 at 06:49, <patrice.chot...@st.com> wrote: > From: Patrice Chotard <patrice.chot...@st.com> > > STM32F7 and H7 shared the same SDRAM control block. > On STM32H7 few control bits has been added. > The current driver need some minor adaptation as FMC block > enable/disable for H7. > > Signed-off-by: Patrice Chotard <patrice.chot...@st.com> > Acked-by: Vikas MANOCHA <vikas.mano...@st.com> > --- > drivers/ram/stm32_sdram.c | 23 ++++++++++++++++++++++- > 1 file changed, 22 insertions(+), 1 deletion(-)
Reviewed-by: Simon Glass <s...@chromium.org> nit / question below > > diff --git a/drivers/ram/stm32_sdram.c b/drivers/ram/stm32_sdram.c > index 5e7539c..e27c6a8 100644 > --- a/drivers/ram/stm32_sdram.c > +++ b/drivers/ram/stm32_sdram.c > @@ -54,6 +54,10 @@ struct stm32_fmc_regs { > u32 sdsr; /* SDRAM Status register */ > }; > > +/* NOR/PSRAM Control register BCR1 */ > +#define FMC_BCR1_FMCEN 31 /* FMC controller Enable, only > availabe > + for H7*/ Use the normal comment style for multi-line comments. Here I think you should merge these two comments and put them on the line before the #define. > + > /* Control register SDCR */ > #define FMC_SDCR_RPIPE_SHIFT 13 /* RPIPE bit shift */ > #define FMC_SDCR_RBURST_SHIFT 12 /* RBURST bit shift */ > @@ -123,6 +127,11 @@ enum stm32_fmc_bank { > MAX_SDRAM_BANK, > }; > > +enum stm32_fmc_family { > + STM32F7_FMC, > + STM32H7_FMC, > +}; > + > struct bank_params { > struct stm32_sdram_control *sdram_control; > struct stm32_sdram_timing *sdram_timing; > @@ -134,6 +143,7 @@ struct stm32_sdram_params { > struct stm32_fmc_regs *base; > u8 no_sdram_banks; > struct bank_params bank_params[MAX_SDRAM_BANK]; > + enum stm32_fmc_family family; > }; > > #define SDRAM_MODE_BL_SHIFT 0 > @@ -151,6 +161,10 @@ int stm32_sdram_init(struct udevice *dev) > u32 ref_count; > u8 i; > > + /* disable the FMC controller */ > + if (params->family == STM32H7_FMC) > + generic_clear_bit(FMC_BCR1_FMCEN, (unsigned long > *)®s->bcr1); I'm not sure what generic_clear_bit() is...is it different from clrbits_le32()? But why the cast to unsigned long *? Shouldn't the function handle the register (which is presumably something like u32) correctly? > + > for (i = 0; i < params->no_sdram_banks; i++) { > control = params->bank_params[i].sdram_control; > timing = params->bank_params[i].sdram_timing; > @@ -193,6 +207,7 @@ int stm32_sdram_init(struct udevice *dev) > | timing->txsr << FMC_SDTR_TXSR_SHIFT > | timing->tmrd << FMC_SDTR_TMRD_SHIFT, > ®s->sdtr2); > + > if (target_bank == SDRAM_BANK1) > ctb = FMC_SDCMR_BANK_1; > else > @@ -225,6 +240,10 @@ int stm32_sdram_init(struct udevice *dev) > writel(ref_count << 1, ®s->sdrtr); > } > > + /* enable the FMC controller */ > + if (params->family == STM32H7_FMC) > + generic_set_bit(FMC_BCR1_FMCEN, (unsigned long *)®s->bcr1); > + > return 0; > } > > @@ -305,6 +324,7 @@ static int stm32_fmc_probe(struct udevice *dev) > return -EINVAL; > > params->base = (struct stm32_fmc_regs *)addr; > + params->family = dev_get_driver_data(dev); > > #ifdef CONFIG_CLK > struct clk clk; > @@ -337,7 +357,8 @@ static struct ram_ops stm32_fmc_ops = { > }; > > static const struct udevice_id stm32_fmc_ids[] = { > - { .compatible = "st,stm32-fmc" }, > + { .compatible = "st,stm32-fmc", .data = STM32F7_FMC }, > + { .compatible = "st,stm32h7-fmc", .data = STM32H7_FMC }, > { } > }; > > -- > 1.9.1 > Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot