[PATCH 10/10] arm: stm32mp: fdt: update kernel device tree according the part number
Patrice CHOTARD
patrice.chotard at st.com
Wed Mar 18 11:16:59 CET 2020
On 2/12/20 7:37 PM, Patrick Delaunay wrote:
> Update the kernel device tree for STM32MP15x product lines according
> the used soc and its part number, when CONFIG_OF_SYSTEM_SETUP is activated:
> - STM32MP15XA hasn't Crypto (cryp1/2)
> - STM32M151 and STM32M153 hasn't 3D GPU and DSI host
> - STM32M151 hasn't CAN FD and has single A7
>
> For example:
>
> FDT: cpu 1 node remove for STM32MP151AAA Rev.B
> FDT: can at 4400e000 node disabled for STM32MP151AAA Rev.B
> FDT: gpu at 59000000 node disabled for STM32MP151AAA Rev.B
> FDT: dsi at 5a000000 node disabled for STM32MP151AAA Rev.B
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
>
> arch/arm/mach-stm32mp/fdt.c | 100 +++++++++++++++++++++++++++++++-----
> 1 file changed, 88 insertions(+), 12 deletions(-)
>
> diff --git a/arch/arm/mach-stm32mp/fdt.c b/arch/arm/mach-stm32mp/fdt.c
> index 82c430b7c7..a3db86dc46 100644
> --- a/arch/arm/mach-stm32mp/fdt.c
> +++ b/arch/arm/mach-stm32mp/fdt.c
> @@ -23,6 +23,12 @@
>
> #define ETZPC_RESERVED 0xffffffff
>
> +#define STM32_FDCAN_BASE 0x4400e000
> +#define STM32_CRYP2_BASE 0x4c005000
> +#define STM32_CRYP1_BASE 0x54001000
> +#define STM32_GPU_BASE 0x59000000
> +#define STM32_DSI_BASE 0x5a000000
> +
> static const u32 stm32mp1_ip_addr[] = {
> 0x5c008000, /* 00 stgenc */
> 0x54000000, /* 01 bkpsram */
> @@ -33,7 +39,7 @@ static const u32 stm32mp1_ip_addr[] = {
> ETZPC_RESERVED, /* 06 reserved */
> 0x54003000, /* 07 rng1 */
> 0x54002000, /* 08 hash1 */
> - 0x54001000, /* 09 cryp1 */
> + STM32_CRYP1_BASE, /* 09 cryp1 */
> 0x5a003000, /* 0A ddrctrl */
> 0x5a004000, /* 0B ddrphyc */
> 0x5c009000, /* 0C i2c6 */
> @@ -86,7 +92,7 @@ static const u32 stm32mp1_ip_addr[] = {
> 0x4400b000, /* 3B sai2 */
> 0x4400c000, /* 3C sai3 */
> 0x4400d000, /* 3D dfsdm */
> - 0x4400e000, /* 3E tt_fdcan */
> + STM32_FDCAN_BASE, /* 3E tt_fdcan */
> ETZPC_RESERVED, /* 3F reserved */
> 0x50021000, /* 40 lptim2 */
> 0x50022000, /* 41 lptim3 */
> @@ -99,7 +105,7 @@ static const u32 stm32mp1_ip_addr[] = {
> 0x48003000, /* 48 adc */
> 0x4c002000, /* 49 hash2 */
> 0x4c003000, /* 4A rng2 */
> - 0x4c005000, /* 4B cryp2 */
> + STM32_CRYP2_BASE, /* 4B cryp2 */
> ETZPC_RESERVED, /* 4C reserved */
> ETZPC_RESERVED, /* 4D reserved */
> ETZPC_RESERVED, /* 4E reserved */
> @@ -126,11 +132,13 @@ static const u32 stm32mp1_ip_addr[] = {
> static bool fdt_disable_subnode_by_address(void *fdt, int offset, u32 addr)
> {
> int node;
> + fdt_addr_t regs;
>
> for (node = fdt_first_subnode(fdt, offset);
> node >= 0;
> node = fdt_next_subnode(fdt, node)) {
> - if (addr == (u32)fdt_getprop(fdt, node, "reg", 0)) {
> + regs = fdtdec_get_addr(fdt, node, "reg");
> + if (addr == regs) {
> if (fdtdec_get_is_enabled(fdt, node)) {
> fdt_status_disabled(fdt, node);
>
> @@ -143,11 +151,11 @@ static bool fdt_disable_subnode_by_address(void *fdt, int offset, u32 addr)
> return false;
> }
>
> -static int stm32_fdt_fixup_etzpc(void *fdt)
> +static int stm32_fdt_fixup_etzpc(void *fdt, int soc_node)
> {
> const u32 *array;
> int array_size, i;
> - int soc_node, offset, shift;
> + int offset, shift;
> u32 addr, status, decprot[ETZPC_DECPROT_NB];
>
> array = stm32mp1_ip_addr;
> @@ -156,10 +164,6 @@ static int stm32_fdt_fixup_etzpc(void *fdt)
> for (i = 0; i < ETZPC_DECPROT_NB; i++)
> decprot[i] = readl(ETZPC_DECPROT(i));
>
> - soc_node = fdt_path_offset(fdt, "/soc");
> - if (soc_node < 0)
> - return soc_node;
> -
> for (i = 0; i < array_size; i++) {
> offset = i / NB_PROT_PER_REG;
> shift = (i % NB_PROT_PER_REG) * DECPROT_NB_BITS;
> @@ -180,6 +184,40 @@ static int stm32_fdt_fixup_etzpc(void *fdt)
> return 0;
> }
>
> +/* deactivate all the cpu except core 0 */
> +static void stm32_fdt_fixup_cpu(void *blob, char *name)
> +{
> + int off;
> + u32 reg;
> +
> + off = fdt_path_offset(blob, "/cpus");
> + if (off < 0) {
> + printf("%s: couldn't find /cpus node\n", __func__);
> + return;
> + }
> +
> + off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
> + while (off != -FDT_ERR_NOTFOUND) {
> + reg = fdtdec_get_addr(blob, off, "reg");
> + if (reg != 0) {
> + fdt_del_node(blob, off);
> + printf("FDT: cpu %d node remove for %s\n", reg, name);
> + /* after delete we can't trust the offsets anymore */
> + off = -1;
> + }
> + off = fdt_node_offset_by_prop_value(blob, off,
> + "device_type", "cpu", 4);
> + }
> +}
> +
> +static void stm32_fdt_disable(void *fdt, int offset, u32 addr,
> + const char *string, const char *name)
> +{
> + if (fdt_disable_subnode_by_address(fdt, offset, addr))
> + printf("FDT: %s@%08x node disabled for %s\n",
> + string, addr, name);
> +}
> +
> /*
> * This function is called right before the kernel is booted. "blob" is the
> * device tree that will be passed to the kernel.
> @@ -187,14 +225,52 @@ static int stm32_fdt_fixup_etzpc(void *fdt)
> int ft_system_setup(void *blob, bd_t *bd)
> {
> int ret = 0;
> - u32 pkg;
> + int soc;
> + u32 pkg, cpu;
> + char name[SOC_NAME_SIZE];
> +
> + soc = fdt_path_offset(blob, "/soc");
> + if (soc < 0)
> + return soc;
>
> if (CONFIG_IS_ENABLED(STM32_ETZPC)) {
> - ret = stm32_fdt_fixup_etzpc(blob);
> + ret = stm32_fdt_fixup_etzpc(blob, soc);
> if (ret)
> return ret;
> }
>
> + /* MPUs Part Numbers and name*/
> + cpu = get_cpu_type();
> + get_soc_name(name);
> +
> + switch (cpu) {
> + case CPU_STM32MP151Cxx:
> + case CPU_STM32MP151Axx:
> + stm32_fdt_fixup_cpu(blob, name);
> + /* after cpu delete we can't trust the soc offsets anymore */
> + soc = fdt_path_offset(blob, "/soc");
> + stm32_fdt_disable(blob, soc, STM32_FDCAN_BASE, "can", name);
> + /* fall through */
> + case CPU_STM32MP153Cxx:
> + case CPU_STM32MP153Axx:
> + stm32_fdt_disable(blob, soc, STM32_GPU_BASE, "gpu", name);
> + stm32_fdt_disable(blob, soc, STM32_DSI_BASE, "dsi", name);
> + break;
> + default:
> + break;
> + }
> +
> + switch (cpu) {
> + case CPU_STM32MP157Axx:
> + case CPU_STM32MP153Axx:
> + case CPU_STM32MP151Axx:
> + stm32_fdt_disable(blob, soc, STM32_CRYP1_BASE, "cryp", name);
> + stm32_fdt_disable(blob, soc, STM32_CRYP2_BASE, "cryp", name);
> + break;
> + default:
> + break;
> + }
> +
> switch (get_cpu_package()) {
> case PKG_AA_LBGA448:
> pkg = STM32MP_PKG_AA;
Acked-by: Patrice Chotard <patrice.chotard at st.com>
Thanks
Patrice
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