From: Joel Stanley joel@jms.id.au
stable inclusion form stable-v5.10.82 commit 9b3d3b72be84027d33d5207f7296235bc8ac7fca bugzilla: 185877 https://gitee.com/openeuler/kernel/issues/I4QU6V
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit f45c5b1c27293f834682e89003f88b3512329ab4 ]
Move the soc revision parsing to the initial probe, saving the driver from parsing the register multiple times.
Use this variable to select the correct divisor table for the AHB clock. Before this fix the A2 would have used the A0 table.
Fixes: 2d491066ccd4 ("clk: ast2600: Fix AHB clock divider for A1") Signed-off-by: Joel Stanley joel@jms.id.au Link: https://lore.kernel.org/r/20210922235449.213631-1-joel@jms.id.au Reviewed-by: Andrew Jeffery andrew@aj.id.au Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/clk/clk-ast2600.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/clk/clk-ast2600.c b/drivers/clk/clk-ast2600.c index bc3be5f3eae1..24dab2312bc6 100644 --- a/drivers/clk/clk-ast2600.c +++ b/drivers/clk/clk-ast2600.c @@ -51,6 +51,8 @@ static DEFINE_SPINLOCK(aspeed_g6_clk_lock); static struct clk_hw_onecell_data *aspeed_g6_clk_data;
static void __iomem *scu_g6_base; +/* AST2600 revision: A0, A1, A2, etc */ +static u8 soc_rev;
/* * Clocks marked with CLK_IS_CRITICAL: @@ -191,9 +193,8 @@ static struct clk_hw *ast2600_calc_pll(const char *name, u32 val) static struct clk_hw *ast2600_calc_apll(const char *name, u32 val) { unsigned int mult, div; - u32 chip_id = readl(scu_g6_base + ASPEED_G6_SILICON_REV);
- if (((chip_id & CHIP_REVISION_ID) >> 16) >= 2) { + if (soc_rev >= 2) { if (val & BIT(24)) { /* Pass through mode */ mult = div = 1; @@ -707,7 +708,7 @@ static const u32 ast2600_a1_axi_ahb200_tbl[] = { static void __init aspeed_g6_cc(struct regmap *map) { struct clk_hw *hw; - u32 val, div, divbits, chip_id, axi_div, ahb_div; + u32 val, div, divbits, axi_div, ahb_div;
clk_hw_register_fixed_rate(NULL, "clkin", NULL, 0, 25000000);
@@ -738,8 +739,7 @@ static void __init aspeed_g6_cc(struct regmap *map) axi_div = 2;
divbits = (val >> 11) & 0x3; - regmap_read(map, ASPEED_G6_SILICON_REV, &chip_id); - if (chip_id & BIT(16)) { + if (soc_rev >= 1) { if (!divbits) { ahb_div = ast2600_a1_axi_ahb200_tbl[(val >> 8) & 0x3]; if (val & BIT(16)) @@ -784,6 +784,8 @@ static void __init aspeed_g6_cc_init(struct device_node *np) if (!scu_g6_base) return;
+ soc_rev = (readl(scu_g6_base + ASPEED_G6_SILICON_REV) & CHIP_REVISION_ID) >> 16; + aspeed_g6_clk_data = kzalloc(struct_size(aspeed_g6_clk_data, hws, ASPEED_G6_NUM_CLKS), GFP_KERNEL); if (!aspeed_g6_clk_data)