Commit Graph

12 Commits

Author SHA1 Message Date
Bin Meng
47a47654e8 lib: utils/fdt: Change addr and size to uint64_t
The maximum address and size encoded in DT are 64-bit numbers, so we
should use uint64_t for 'addr' and 'size' in fdt_get_node_addr_size().

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-08-07 17:26:51 +05:30
Heinrich Schuchardt
e928472e67 lib: utils: support both of gpio-poweroff, gpio-reset
The generic GPIO reset driver has two entries in the match table:
"gpio-poweroff", "gpio-reset". Only the first entry is considered by
fdt_reset_init().

Define "gpio-poweroff" and "gpio-reset" as compatibility strings of two
separate reset drivers. They still can share code.

Fixes: e3d6919d10 ("lib: utils/reset: Add generic GPIO reset driver")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-27 17:26:54 +05:30
Heinrich Schuchardt
ce03c88ee1 lib: utils: remove unused variable in fdt_reset_init
The value of variable current_driver is unused. Remove the variable.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-27 17:16:02 +05:30
Green Wan
e3d6919d10 lib: utils/reset: Add generic GPIO reset driver
We add generic GPIO reset driver inspired from gpio-restart
and gpio-poweroff drivers of Linux kernel.

Signed-off-by: Green Wan <green.wan@sifive.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17 14:12:07 +05:30
Green Wan
b7f2cd268b lib: utils: reset: unify naming of 'sifive_test' device
Unify all the file and function names of 'sifive_test' device, to use
the same prefix. This is also a preparatory patch for upcoming sifive
reset device.

Signed-off-by: Green Wan <green.wan@sifive.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-07-05 21:36:40 +05:30
Heinrich Schuchardt
360ab88569 lib: utils: missing initialization in thead_reset_init
If property csr-copy does not exist, fdt_getprop() will return NULL and cnt
will have a random value from the stack.

Call clone_csrs() only if cnt is initialized to a non-zero value.

Fixes: 49e422c5ad ("lib: utils: reset: Add T-HEAD sample platform reset driver")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-06-11 19:20:16 +05:30
Anup Patel
54d7def6c2 lib: utils: Try other FDT drivers when we see SBI_ENODEV
We should try other FDT drivers when we see SBI_ENODEV returned
by cold_init() of FDT driver.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
2021-05-24 15:49:21 +05:30
Anup Patel
043d088e39 lib: sbi: Simplify system reset platform operations
Instead of having system_reset_check() and system_reset() callbacks
in platform operations, it will be much simpler for reset driver to
directly register these operations as a device to the sbi_system
implementation.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2021-04-28 17:25:00 +05:30
Guo Ren
49e422c5ad lib: utils: reset: Add T-HEAD sample platform reset driver
This driver is for T-HEAD test chip, fpga. It could work with
all T-HEAD riscv processors: C9xx series.

example1: (Using io-regs for reset)
reset: reset-sample {
	compatible = "thead,reset-sample";
	plic-delegate = <0xff 0xd81ffffc>;
	entry-reg = <0xff 0xff019050>;
	entry-cnt = <4>;
	control-reg = <0xff 0xff015004>;
	control-val = <0x1c>;
	csr-copy = <0x7f3 0x7c0 0x7c1 0x7c2 0x7c3 0x7c5 0x7cc>;
};

example2: (Using csr-regs for reset)
reset: reset-sample {
	compatible = "thead,reset-sample";
	plic-delegate = <0xff 0xd81ffffc>;
	using-csr-reset;
	csr-copy = <0x7c0 0x7c1 0x7c2 0x7c3 0x7c5 0x7cc
		    0x3b0 0x3b1 0x3b2 0x3b3
		    0x3b4 0x3b5 0x3b6 0x3b7
		    0x3a0>;
};

example3: (Only delegate plic enable to S-mode)
reset: reset-sample {
	compatible = "thead,reset-sample";
	plic-delegate = <0xff 0xd81ffffc>;
};

After this patch, all T-HEAD c9xx would use platform/generic with fw_dynamic
as default:

CROSS_COMPILE=riscv64-linux-gnu- PLATFORM=generic FW_PIC=y /usr/bin/make

The platform/thead will be deprecated.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-04-22 15:13:53 +05:30
Anup Patel
5c429ae213 lib: sbi: Improve system reset platform operations
To implement the SBI SRST extension, we need two platform operations
for system reset:
1) system_reset_check() - This operation will check whether given
   reset type and reason are supported by the platform
2) system_reset() - This operation will do the actual platform
   system reset and it will not return if reset type and reason
   are supported by the platform

This patch updates system reset related code everywhere as-per above.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2020-12-01 17:10:31 +05:30
Anup Patel
2c685c214f lib: utils: Extend fdt_find_match() Implementation
We extend fdt_find_match() implementation by adding node offset
parameter which represents the first node to match from.

The improved fdt_find_match() can be used to find multiple
match nodes.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2020-05-23 10:36:33 +05:30
Anup Patel
7cc6fa4d8a lib: utils: Add simple FDT reset framework
We add simple reset framework which will select and use reset driver
based on details in FDT passed by previous booting stage.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2020-05-01 10:31:37 +05:30